Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / Data / System / Data / OleDb / OleDbConnection.cs / 1 / OleDbConnection.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// [....]
// [....]
//-----------------------------------------------------------------------------
namespace System.Data.OleDb {
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.Common;
using System.Data.ProviderBase;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Permissions;
using System.Text;
using System.Threading;
using SysTx = System.Transactions;
// wraps the OLEDB IDBInitialize interface which represents a connection
// Notes about connection pooling
// 1. Connection pooling isn't supported on Win95
// 2. Only happens if we use the IDataInitialize or IDBPromptInitialize interfaces
// it won't happen if you directly create the provider and set its properties
// 3. First call on IDBInitialize must be Initialize, can't QI for any other interfaces before that
[DefaultEvent("InfoMessage")]
#if WINFSInternalOnly
internal
#else
public
#endif
sealed partial class OleDbConnection : DbConnection, ICloneable, IDbConnection {
static private readonly object EventInfoMessage = new object();
public OleDbConnection(string connectionString) : this() {
ConnectionString = connectionString;
}
private OleDbConnection(OleDbConnection connection) : this() { // Clone
CopyFrom(connection);
}
[
DefaultValue(""),
RecommendedAsConfigurable(true),
RefreshProperties(RefreshProperties.All),
ResCategoryAttribute(Res.DataCategory_Data),
Editor("Microsoft.VSDesigner.Data.ADO.Design.OleDbConnectionStringEditor, " + AssemblyRef.MicrosoftVSDesigner, "System.Drawing.Design.UITypeEditor, " + AssemblyRef.SystemDrawing),
ResDescriptionAttribute(Res.OleDbConnection_ConnectionString),
]
override public string ConnectionString {
get {
return ConnectionString_Get();
}
set {
ConnectionString_Set(value);
}
}
private OleDbConnectionString OleDbConnectionStringValue {
get { return (OleDbConnectionString)ConnectionOptions; }
}
[
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
ResDescriptionAttribute(Res.OleDbConnection_ConnectionTimeout),
]
override public int ConnectionTimeout {
get {
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#\n", ObjectID);
try {
object value = null;
if (IsOpen) {
value = GetDataSourceValue(OleDbPropertySetGuid.DBInit, ODB.DBPROP_INIT_TIMEOUT);
}
else {
OleDbConnectionString constr = this.OleDbConnectionStringValue;
value = (null != constr) ? constr.ConnectTimeout : ADP.DefaultConnectionTimeout;
}
if (null != value) {
return Convert.ToInt32(value, CultureInfo.InvariantCulture);
}
else {
return ADP.DefaultConnectionTimeout;
}
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
}
[
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
ResDescriptionAttribute(Res.OleDbConnection_Database),
]
override public string Database {
get {
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#\n", ObjectID);
try {
OleDbConnectionString constr = (OleDbConnectionString)UserConnectionOptions;
object value = (null != constr) ? constr.InitialCatalog : ADP.StrEmpty;
if ((null != value) && !((string)value).StartsWith(DbConnectionOptions.DataDirectory, StringComparison.OrdinalIgnoreCase)) {
OleDbConnectionInternal connection = GetOpenConnection();
if (null != connection) {
if (connection.HasSession) {
value = GetDataSourceValue(OleDbPropertySetGuid.DataSource, ODB.DBPROP_CURRENTCATALOG);
}
else {
value = GetDataSourceValue(OleDbPropertySetGuid.DBInit, ODB.DBPROP_INIT_CATALOG);
}
}
else {
constr = this.OleDbConnectionStringValue;
value = (null != constr) ? constr.InitialCatalog : ADP.StrEmpty;
}
}
return Convert.ToString(value, CultureInfo.InvariantCulture);
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
}
[
Browsable(true),
ResDescriptionAttribute(Res.OleDbConnection_DataSource),
]
override public string DataSource {
get {
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#\n", ObjectID);
try {
OleDbConnectionString constr = (OleDbConnectionString)UserConnectionOptions;
object value = (null != constr) ? constr.DataSource : ADP.StrEmpty;
if ((null != value) && !((string)value).StartsWith(DbConnectionOptions.DataDirectory, StringComparison.OrdinalIgnoreCase)) {
if (IsOpen) {
value = GetDataSourceValue(OleDbPropertySetGuid.DBInit, ODB.DBPROP_INIT_DATASOURCE);
if ((null == value) || ((value is string) && (0 == (value as string).Length))) {
value = GetDataSourceValue(OleDbPropertySetGuid.DataSourceInfo, ODB.DBPROP_DATASOURCENAME); // MDAC 76248
}
}
else {
constr = this.OleDbConnectionStringValue;
value = (null != constr) ? constr.DataSource : ADP.StrEmpty;
}
}
return Convert.ToString(value, CultureInfo.InvariantCulture);
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
}
internal bool IsOpen {
get { return (null != GetOpenConnection()); }
}
internal OleDbTransaction LocalTransaction {
set {
OleDbConnectionInternal openConnection = GetOpenConnection();
if (null != openConnection) {
openConnection.LocalTransaction = value;
}
}
}
[
Browsable(true),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
ResCategoryAttribute(Res.DataCategory_Data),
ResDescriptionAttribute(Res.OleDbConnection_Provider),
]
public String Provider {
get {
Bid.Trace(" %d#\n", ObjectID);
OleDbConnectionString constr = this.OleDbConnectionStringValue;
string value = ((null != constr) ? constr.ConvertValueToString(ODB.Provider, null) : null);
return ((null != value) ? value : ADP.StrEmpty);
}
}
internal OleDbConnectionPoolGroupProviderInfo ProviderInfo {
get {
return (OleDbConnectionPoolGroupProviderInfo)PoolGroup.ProviderInfo;
}
}
[
ResDescriptionAttribute(Res.OleDbConnection_ServerVersion),
]
override public string ServerVersion { // MDAC 55481
get {
return InnerConnection.ServerVersion;
}
}
[
EditorBrowsableAttribute(EditorBrowsableState.Advanced),
]
public void ResetState() { // MDAC 58606
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#\n", ObjectID);
try {
if (IsOpen) {
object value = GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo, ODB.DBPROP_CONNECTIONSTATUS);
if (value is Int32) {
int connectionStatus = (int) value;
switch (connectionStatus) {
case ODB.DBPROPVAL_CS_UNINITIALIZED: // provider closed on us
case ODB.DBPROPVAL_CS_COMMUNICATIONFAILURE: // broken connection
GetOpenConnection().DoomThisConnection();
NotifyWeakReference(OleDbReferenceCollection.Canceling); // MDAC 71435
Close();
break;
case ODB.DBPROPVAL_CS_INITIALIZED: // everything is okay
break;
default: // have to assume everything is okay
Debug.Assert(false, "Unknown 'Connection Status' value " + connectionStatus.ToString("G", CultureInfo.InvariantCulture));
break;
}
}
}
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
[
ResCategoryAttribute(Res.DataCategory_InfoMessage),
ResDescriptionAttribute(Res.DbConnection_InfoMessage),
]
public event OleDbInfoMessageEventHandler InfoMessage {
add {
Events.AddHandler(EventInfoMessage, value);
}
remove {
Events.RemoveHandler(EventInfoMessage, value);
}
}
internal UnsafeNativeMethods.ICommandText ICommandText() {
Debug.Assert(null != GetOpenConnection(), "ICommandText closed");
return GetOpenConnection().ICommandText();
}
private IDBPropertiesWrapper IDBProperties() {
Debug.Assert(null != GetOpenConnection(), "IDBProperties closed");
return GetOpenConnection().IDBProperties();
}
internal IOpenRowsetWrapper IOpenRowset() {
Debug.Assert(null != GetOpenConnection(), "IOpenRowset closed");
return GetOpenConnection().IOpenRowset();
}
internal int SqlSupport() {
Debug.Assert(null != this.OleDbConnectionStringValue, "no OleDbConnectionString SqlSupport");
return this.OleDbConnectionStringValue.GetSqlSupport(this);
}
internal bool SupportMultipleResults() {
Debug.Assert(null != this.OleDbConnectionStringValue, "no OleDbConnectionString SupportMultipleResults");
return this.OleDbConnectionStringValue.GetSupportMultipleResults(this);
}
internal bool SupportIRow(OleDbCommand cmd) { // MDAC 72902
Debug.Assert(null != this.OleDbConnectionStringValue, "no OleDbConnectionString SupportIRow");
return this.OleDbConnectionStringValue.GetSupportIRow(this, cmd);
}
internal int QuotedIdentifierCase() { // MDAC 67385
Debug.Assert(null != this.OleDbConnectionStringValue, "no OleDbConnectionString QuotedIdentifierCase");
int quotedIdentifierCase;
object value = GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo, ODB.DBPROP_QUOTEDIDENTIFIERCASE);
if (value is Int32) {// not OleDbPropertyStatus
quotedIdentifierCase = (int) value;
}
else {
quotedIdentifierCase = -1;
}
return quotedIdentifierCase;
}
new public OleDbTransaction BeginTransaction() {
return BeginTransaction(IsolationLevel.Unspecified);
}
new public OleDbTransaction BeginTransaction(IsolationLevel isolationLevel) {
return (OleDbTransaction)InnerConnection.BeginTransaction(isolationLevel);
}
override public void ChangeDatabase(string value) {
OleDbConnection.ExecutePermission.Demand();
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#, value='%ls'\n", ObjectID, value);
try {
CheckStateOpen(ADP.ChangeDatabase);
if ((null == value) || (0 == value.Trim().Length)) { // MDAC 62679
throw ADP.EmptyDatabaseName();
}
SetDataSourcePropertyValue(OleDbPropertySetGuid.DataSource, ODB.DBPROP_CURRENTCATALOG, ODB.Current_Catalog, true, value);
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
internal void CheckStateOpen(string method) {
ConnectionState state = State;
if (ConnectionState.Open != state) {
throw ADP.OpenConnectionRequired(method, state);
}
}
object ICloneable.Clone() {
OleDbConnection clone = new OleDbConnection(this);
Bid.Trace(" %d#, clone=%d#\n", ObjectID, clone.ObjectID);
return clone;
}
override public void Close() {
InnerConnection.CloseConnection(this, ConnectionFactory);
// does not require GC.KeepAlive(this) because of OnStateChange
}
new public OleDbCommand CreateCommand() {
return new OleDbCommand("", this);
}
private void DisposeMe(bool disposing) { // MDAC 65459
if (disposing) { // release mananged objects
if (DesignMode) {
// release the object pool in design-mode so that
// native MDAC can be properly released during shutdown
OleDbConnection.ReleaseObjectPool();
}
}
}
public void EnlistDistributedTransaction(System.EnterpriseServices.ITransaction transaction) {
EnlistDistributedTransactionHelper(transaction);
}
internal object GetDataSourcePropertyValue(Guid propertySet, int propertyID) {
OleDbConnectionInternal connection = GetOpenConnection();
return connection.GetDataSourcePropertyValue(propertySet, propertyID);
}
internal object GetDataSourceValue(Guid propertySet, int propertyID) {
object value = GetDataSourcePropertyValue(propertySet, propertyID);
if ((value is OleDbPropertyStatus) || Convert.IsDBNull(value)) {
value = null;
}
return value;
}
private OleDbConnectionInternal GetOpenConnection() {
DbConnectionInternal innerConnection = InnerConnection;
return (innerConnection as OleDbConnectionInternal);
}
internal void GetLiteralQuotes(string method, out string quotePrefix, out string quoteSuffix) {
CheckStateOpen(method);
OleDbConnectionPoolGroupProviderInfo info = ProviderInfo;
if (info.HasQuoteFix) {
quotePrefix = info.QuotePrefix;
quoteSuffix = info.QuoteSuffix;
}
else {
OleDbConnectionInternal connection = GetOpenConnection();
quotePrefix = connection.GetLiteralInfo(ODB.DBLITERAL_QUOTE_PREFIX);
quoteSuffix = connection.GetLiteralInfo(ODB.DBLITERAL_QUOTE_SUFFIX);
if (null == quotePrefix) {
quotePrefix = "";
}
if (null == quoteSuffix) {
quoteSuffix = quotePrefix;
}
info.SetQuoteFix(quotePrefix, quoteSuffix);
}
}
public DataTable GetOleDbSchemaTable(Guid schema, object[] restrictions) { // MDAC 61846
OleDbConnection.ExecutePermission.Demand();
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#, schema=%p{GUID}, restrictions\n", ObjectID, schema);
try {
CheckStateOpen(ADP.GetOleDbSchemaTable);
OleDbConnectionInternal connection = GetOpenConnection();
if (OleDbSchemaGuid.DbInfoLiterals == schema) {
if ((null == restrictions) || (0 == restrictions.Length)) {
return connection.BuildInfoLiterals();
}
throw ODB.InvalidRestrictionsDbInfoLiteral("restrictions");
}
else if (OleDbSchemaGuid.SchemaGuids == schema) {
if ((null == restrictions) || (0 == restrictions.Length)) {
return connection.BuildSchemaGuids();
}
throw ODB.InvalidRestrictionsSchemaGuids("restrictions");
}
else if (OleDbSchemaGuid.DbInfoKeywords == schema) {
if ((null == restrictions) || (0 == restrictions.Length)) {
return connection.BuildInfoKeywords();
}
throw ODB.InvalidRestrictionsDbInfoKeywords("restrictions");
}
if (connection.SupportSchemaRowset(schema)) {
return connection.GetSchemaRowset(schema, restrictions);
}
else {
using(IDBSchemaRowsetWrapper wrapper = connection.IDBSchemaRowset()) {
if (null == wrapper.Value) {
throw ODB.SchemaRowsetsNotSupported(Provider); // MDAC 72689
}
}
throw ODB.NotSupportedSchemaTable(schema, this); // MDAC 63279
}
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
internal DataTable GetSchemaRowset(Guid schema, object[] restrictions) {
Debug.Assert(null != GetOpenConnection(), "GetSchemaRowset closed");
return GetOpenConnection().GetSchemaRowset(schema, restrictions);
}
internal bool HasLiveReader(OleDbCommand cmd) {
bool result = false;
OleDbConnectionInternal openConnection = GetOpenConnection();
if (null != openConnection) {
result = openConnection.HasLiveReader(cmd);
}
return result;
}
internal void OnInfoMessage(UnsafeNativeMethods.IErrorInfo errorInfo, OleDbHResult errorCode) {
OleDbInfoMessageEventHandler handler = (OleDbInfoMessageEventHandler) Events[EventInfoMessage];
if (null != handler) {
try {
OleDbException exception = OleDbException.CreateException(errorInfo, errorCode, null);
OleDbInfoMessageEventArgs e = new OleDbInfoMessageEventArgs(exception);
if (Bid.TraceOn) {
Bid.Trace(" %d#, Message='%ls'\n", ObjectID, e.Message);
}
handler(this, e);
}
catch (Exception e) { // eat the exception
//
if (!ADP.IsCatchableOrSecurityExceptionType(e)) {
throw;
}
ADP.TraceExceptionWithoutRethrow(e);
}
}
#if DEBUG
else {
OleDbException exception = OleDbException.CreateException(errorInfo, errorCode, null);
Bid.Trace(" %d#, Message='%ls'\n", ObjectID, exception.Message);
}
#endif
}
override public void Open() {
InnerConnection.OpenConnection(this, ConnectionFactory);
// SQLBUDT #276132 - need to manually enlist in some cases, because
// native OLE DB doesn't know about SysTx transactions.
if ((0!=(ODB.DBPROPVAL_OS_TXNENLISTMENT & ((OleDbConnectionString)(this.ConnectionOptions)).OleDbServices))
&& ADP.NeedManualEnlistment()) {
GetOpenConnection().EnlistTransactionInternal(SysTx.Transaction.Current, true);
}
}
internal void SetDataSourcePropertyValue(Guid propertySet, int propertyID, string description, bool required, object value) {
CheckStateOpen(ADP.SetProperties);
OleDbHResult hr;
using(IDBPropertiesWrapper idbProperties = IDBProperties()) {
using(DBPropSet propSet = DBPropSet.CreateProperty(propertySet, propertyID, required, value)) {
Bid.Trace(" %d#\n", ObjectID);
hr = idbProperties.Value.SetProperties(propSet.PropertySetCount, propSet);
Bid.Trace(" %08X{HRESULT}\n", hr);
if (hr < 0) {
Exception e = OleDbConnection.ProcessResults(hr, null, this);
if (OleDbHResult.DB_E_ERRORSOCCURRED == hr) {
StringBuilder builder = new StringBuilder();
Debug.Assert(1 == propSet.PropertySetCount, "too many PropertySets");
tagDBPROP[] dbprops = propSet.GetPropertySet(0, out propertySet);
Debug.Assert(1 == dbprops.Length, "too many Properties");
ODB.PropsetSetFailure(builder, description, dbprops[0].dwStatus);
e = ODB.PropsetSetFailure(builder.ToString(), e);
}
if (null != e) {
throw e;
}
}
else {
SafeNativeMethods.Wrapper.ClearErrorInfo();
}
}
}
}
internal bool SupportSchemaRowset(Guid schema) {
return GetOpenConnection().SupportSchemaRowset(schema);
}
internal OleDbTransaction ValidateTransaction(OleDbTransaction transaction, string method) {
return GetOpenConnection().ValidateTransaction(transaction, method);
}
static internal Exception ProcessResults(OleDbHResult hresult, OleDbConnection connection, object src) {
if ((0 <= (int)hresult) && ((null == connection) || (null == connection.Events[EventInfoMessage]))) {
SafeNativeMethods.Wrapper.ClearErrorInfo();
return null;
}
// ErrorInfo object is to be checked regardless the hresult returned by the function called
Exception e = null;
UnsafeNativeMethods.IErrorInfo errorInfo = null;
OleDbHResult hr = UnsafeNativeMethods.GetErrorInfo(0, out errorInfo); // 0 - IErrorInfo exists, 1 - no IErrorInfo
if ((OleDbHResult.S_OK == hr) && (null != errorInfo)) {
if (hresult < 0) {
//
e = OleDbException.CreateException(errorInfo, hresult, null);
//}
if (OleDbHResult.DB_E_OBJECTOPEN == hresult) {
e = ADP.OpenReaderExists(e);
}
ResetState(connection);
}
else if (null != connection) {
connection.OnInfoMessage(errorInfo, hresult);
}
else {
Bid.Trace(" ErrorInfo available, but not connection %08X{HRESULT}\n", hresult);
}
Marshal.ReleaseComObject(errorInfo);
}
else if (0 < hresult) {
// @devnote: OnInfoMessage with no ErrorInfo
Bid.Trace(" ErrorInfo not available %08X{HRESULT}\n", hresult);
}
else if ((int)hresult < 0) {
e = ODB.NoErrorInformation((null != connection) ? connection.Provider : null, hresult, null); // OleDbException
ResetState(connection);
}
if (null != e) {
ADP.TraceExceptionAsReturnValue(e);
}
return e;
}
// @devnote: should be multithread safe
static public void ReleaseObjectPool() {
(new OleDbPermission(PermissionState.Unrestricted)).Demand();
IntPtr hscp;
Bid.ScopeEnter(out hscp, "\n");
try {
OleDbConnectionString.ReleaseObjectPool();
OleDbConnectionInternal.ReleaseObjectPool();
OleDbConnectionFactory.SingletonInstance.ClearAllPools();
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
static private void ResetState(OleDbConnection connection) {
if (null != connection) {
connection.ResetState();
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// [....]
// [....]
//-----------------------------------------------------------------------------
namespace System.Data.OleDb {
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.Common;
using System.Data.ProviderBase;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Permissions;
using System.Text;
using System.Threading;
using SysTx = System.Transactions;
// wraps the OLEDB IDBInitialize interface which represents a connection
// Notes about connection pooling
// 1. Connection pooling isn't supported on Win95
// 2. Only happens if we use the IDataInitialize or IDBPromptInitialize interfaces
// it won't happen if you directly create the provider and set its properties
// 3. First call on IDBInitialize must be Initialize, can't QI for any other interfaces before that
[DefaultEvent("InfoMessage")]
#if WINFSInternalOnly
internal
#else
public
#endif
sealed partial class OleDbConnection : DbConnection, ICloneable, IDbConnection {
static private readonly object EventInfoMessage = new object();
public OleDbConnection(string connectionString) : this() {
ConnectionString = connectionString;
}
private OleDbConnection(OleDbConnection connection) : this() { // Clone
CopyFrom(connection);
}
[
DefaultValue(""),
RecommendedAsConfigurable(true),
RefreshProperties(RefreshProperties.All),
ResCategoryAttribute(Res.DataCategory_Data),
Editor("Microsoft.VSDesigner.Data.ADO.Design.OleDbConnectionStringEditor, " + AssemblyRef.MicrosoftVSDesigner, "System.Drawing.Design.UITypeEditor, " + AssemblyRef.SystemDrawing),
ResDescriptionAttribute(Res.OleDbConnection_ConnectionString),
]
override public string ConnectionString {
get {
return ConnectionString_Get();
}
set {
ConnectionString_Set(value);
}
}
private OleDbConnectionString OleDbConnectionStringValue {
get { return (OleDbConnectionString)ConnectionOptions; }
}
[
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
ResDescriptionAttribute(Res.OleDbConnection_ConnectionTimeout),
]
override public int ConnectionTimeout {
get {
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#\n", ObjectID);
try {
object value = null;
if (IsOpen) {
value = GetDataSourceValue(OleDbPropertySetGuid.DBInit, ODB.DBPROP_INIT_TIMEOUT);
}
else {
OleDbConnectionString constr = this.OleDbConnectionStringValue;
value = (null != constr) ? constr.ConnectTimeout : ADP.DefaultConnectionTimeout;
}
if (null != value) {
return Convert.ToInt32(value, CultureInfo.InvariantCulture);
}
else {
return ADP.DefaultConnectionTimeout;
}
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
}
[
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
ResDescriptionAttribute(Res.OleDbConnection_Database),
]
override public string Database {
get {
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#\n", ObjectID);
try {
OleDbConnectionString constr = (OleDbConnectionString)UserConnectionOptions;
object value = (null != constr) ? constr.InitialCatalog : ADP.StrEmpty;
if ((null != value) && !((string)value).StartsWith(DbConnectionOptions.DataDirectory, StringComparison.OrdinalIgnoreCase)) {
OleDbConnectionInternal connection = GetOpenConnection();
if (null != connection) {
if (connection.HasSession) {
value = GetDataSourceValue(OleDbPropertySetGuid.DataSource, ODB.DBPROP_CURRENTCATALOG);
}
else {
value = GetDataSourceValue(OleDbPropertySetGuid.DBInit, ODB.DBPROP_INIT_CATALOG);
}
}
else {
constr = this.OleDbConnectionStringValue;
value = (null != constr) ? constr.InitialCatalog : ADP.StrEmpty;
}
}
return Convert.ToString(value, CultureInfo.InvariantCulture);
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
}
[
Browsable(true),
ResDescriptionAttribute(Res.OleDbConnection_DataSource),
]
override public string DataSource {
get {
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#\n", ObjectID);
try {
OleDbConnectionString constr = (OleDbConnectionString)UserConnectionOptions;
object value = (null != constr) ? constr.DataSource : ADP.StrEmpty;
if ((null != value) && !((string)value).StartsWith(DbConnectionOptions.DataDirectory, StringComparison.OrdinalIgnoreCase)) {
if (IsOpen) {
value = GetDataSourceValue(OleDbPropertySetGuid.DBInit, ODB.DBPROP_INIT_DATASOURCE);
if ((null == value) || ((value is string) && (0 == (value as string).Length))) {
value = GetDataSourceValue(OleDbPropertySetGuid.DataSourceInfo, ODB.DBPROP_DATASOURCENAME); // MDAC 76248
}
}
else {
constr = this.OleDbConnectionStringValue;
value = (null != constr) ? constr.DataSource : ADP.StrEmpty;
}
}
return Convert.ToString(value, CultureInfo.InvariantCulture);
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
}
internal bool IsOpen {
get { return (null != GetOpenConnection()); }
}
internal OleDbTransaction LocalTransaction {
set {
OleDbConnectionInternal openConnection = GetOpenConnection();
if (null != openConnection) {
openConnection.LocalTransaction = value;
}
}
}
[
Browsable(true),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
ResCategoryAttribute(Res.DataCategory_Data),
ResDescriptionAttribute(Res.OleDbConnection_Provider),
]
public String Provider {
get {
Bid.Trace(" %d#\n", ObjectID);
OleDbConnectionString constr = this.OleDbConnectionStringValue;
string value = ((null != constr) ? constr.ConvertValueToString(ODB.Provider, null) : null);
return ((null != value) ? value : ADP.StrEmpty);
}
}
internal OleDbConnectionPoolGroupProviderInfo ProviderInfo {
get {
return (OleDbConnectionPoolGroupProviderInfo)PoolGroup.ProviderInfo;
}
}
[
ResDescriptionAttribute(Res.OleDbConnection_ServerVersion),
]
override public string ServerVersion { // MDAC 55481
get {
return InnerConnection.ServerVersion;
}
}
[
EditorBrowsableAttribute(EditorBrowsableState.Advanced),
]
public void ResetState() { // MDAC 58606
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#\n", ObjectID);
try {
if (IsOpen) {
object value = GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo, ODB.DBPROP_CONNECTIONSTATUS);
if (value is Int32) {
int connectionStatus = (int) value;
switch (connectionStatus) {
case ODB.DBPROPVAL_CS_UNINITIALIZED: // provider closed on us
case ODB.DBPROPVAL_CS_COMMUNICATIONFAILURE: // broken connection
GetOpenConnection().DoomThisConnection();
NotifyWeakReference(OleDbReferenceCollection.Canceling); // MDAC 71435
Close();
break;
case ODB.DBPROPVAL_CS_INITIALIZED: // everything is okay
break;
default: // have to assume everything is okay
Debug.Assert(false, "Unknown 'Connection Status' value " + connectionStatus.ToString("G", CultureInfo.InvariantCulture));
break;
}
}
}
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
[
ResCategoryAttribute(Res.DataCategory_InfoMessage),
ResDescriptionAttribute(Res.DbConnection_InfoMessage),
]
public event OleDbInfoMessageEventHandler InfoMessage {
add {
Events.AddHandler(EventInfoMessage, value);
}
remove {
Events.RemoveHandler(EventInfoMessage, value);
}
}
internal UnsafeNativeMethods.ICommandText ICommandText() {
Debug.Assert(null != GetOpenConnection(), "ICommandText closed");
return GetOpenConnection().ICommandText();
}
private IDBPropertiesWrapper IDBProperties() {
Debug.Assert(null != GetOpenConnection(), "IDBProperties closed");
return GetOpenConnection().IDBProperties();
}
internal IOpenRowsetWrapper IOpenRowset() {
Debug.Assert(null != GetOpenConnection(), "IOpenRowset closed");
return GetOpenConnection().IOpenRowset();
}
internal int SqlSupport() {
Debug.Assert(null != this.OleDbConnectionStringValue, "no OleDbConnectionString SqlSupport");
return this.OleDbConnectionStringValue.GetSqlSupport(this);
}
internal bool SupportMultipleResults() {
Debug.Assert(null != this.OleDbConnectionStringValue, "no OleDbConnectionString SupportMultipleResults");
return this.OleDbConnectionStringValue.GetSupportMultipleResults(this);
}
internal bool SupportIRow(OleDbCommand cmd) { // MDAC 72902
Debug.Assert(null != this.OleDbConnectionStringValue, "no OleDbConnectionString SupportIRow");
return this.OleDbConnectionStringValue.GetSupportIRow(this, cmd);
}
internal int QuotedIdentifierCase() { // MDAC 67385
Debug.Assert(null != this.OleDbConnectionStringValue, "no OleDbConnectionString QuotedIdentifierCase");
int quotedIdentifierCase;
object value = GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo, ODB.DBPROP_QUOTEDIDENTIFIERCASE);
if (value is Int32) {// not OleDbPropertyStatus
quotedIdentifierCase = (int) value;
}
else {
quotedIdentifierCase = -1;
}
return quotedIdentifierCase;
}
new public OleDbTransaction BeginTransaction() {
return BeginTransaction(IsolationLevel.Unspecified);
}
new public OleDbTransaction BeginTransaction(IsolationLevel isolationLevel) {
return (OleDbTransaction)InnerConnection.BeginTransaction(isolationLevel);
}
override public void ChangeDatabase(string value) {
OleDbConnection.ExecutePermission.Demand();
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#, value='%ls'\n", ObjectID, value);
try {
CheckStateOpen(ADP.ChangeDatabase);
if ((null == value) || (0 == value.Trim().Length)) { // MDAC 62679
throw ADP.EmptyDatabaseName();
}
SetDataSourcePropertyValue(OleDbPropertySetGuid.DataSource, ODB.DBPROP_CURRENTCATALOG, ODB.Current_Catalog, true, value);
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
internal void CheckStateOpen(string method) {
ConnectionState state = State;
if (ConnectionState.Open != state) {
throw ADP.OpenConnectionRequired(method, state);
}
}
object ICloneable.Clone() {
OleDbConnection clone = new OleDbConnection(this);
Bid.Trace(" %d#, clone=%d#\n", ObjectID, clone.ObjectID);
return clone;
}
override public void Close() {
InnerConnection.CloseConnection(this, ConnectionFactory);
// does not require GC.KeepAlive(this) because of OnStateChange
}
new public OleDbCommand CreateCommand() {
return new OleDbCommand("", this);
}
private void DisposeMe(bool disposing) { // MDAC 65459
if (disposing) { // release mananged objects
if (DesignMode) {
// release the object pool in design-mode so that
// native MDAC can be properly released during shutdown
OleDbConnection.ReleaseObjectPool();
}
}
}
public void EnlistDistributedTransaction(System.EnterpriseServices.ITransaction transaction) {
EnlistDistributedTransactionHelper(transaction);
}
internal object GetDataSourcePropertyValue(Guid propertySet, int propertyID) {
OleDbConnectionInternal connection = GetOpenConnection();
return connection.GetDataSourcePropertyValue(propertySet, propertyID);
}
internal object GetDataSourceValue(Guid propertySet, int propertyID) {
object value = GetDataSourcePropertyValue(propertySet, propertyID);
if ((value is OleDbPropertyStatus) || Convert.IsDBNull(value)) {
value = null;
}
return value;
}
private OleDbConnectionInternal GetOpenConnection() {
DbConnectionInternal innerConnection = InnerConnection;
return (innerConnection as OleDbConnectionInternal);
}
internal void GetLiteralQuotes(string method, out string quotePrefix, out string quoteSuffix) {
CheckStateOpen(method);
OleDbConnectionPoolGroupProviderInfo info = ProviderInfo;
if (info.HasQuoteFix) {
quotePrefix = info.QuotePrefix;
quoteSuffix = info.QuoteSuffix;
}
else {
OleDbConnectionInternal connection = GetOpenConnection();
quotePrefix = connection.GetLiteralInfo(ODB.DBLITERAL_QUOTE_PREFIX);
quoteSuffix = connection.GetLiteralInfo(ODB.DBLITERAL_QUOTE_SUFFIX);
if (null == quotePrefix) {
quotePrefix = "";
}
if (null == quoteSuffix) {
quoteSuffix = quotePrefix;
}
info.SetQuoteFix(quotePrefix, quoteSuffix);
}
}
public DataTable GetOleDbSchemaTable(Guid schema, object[] restrictions) { // MDAC 61846
OleDbConnection.ExecutePermission.Demand();
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#, schema=%p{GUID}, restrictions\n", ObjectID, schema);
try {
CheckStateOpen(ADP.GetOleDbSchemaTable);
OleDbConnectionInternal connection = GetOpenConnection();
if (OleDbSchemaGuid.DbInfoLiterals == schema) {
if ((null == restrictions) || (0 == restrictions.Length)) {
return connection.BuildInfoLiterals();
}
throw ODB.InvalidRestrictionsDbInfoLiteral("restrictions");
}
else if (OleDbSchemaGuid.SchemaGuids == schema) {
if ((null == restrictions) || (0 == restrictions.Length)) {
return connection.BuildSchemaGuids();
}
throw ODB.InvalidRestrictionsSchemaGuids("restrictions");
}
else if (OleDbSchemaGuid.DbInfoKeywords == schema) {
if ((null == restrictions) || (0 == restrictions.Length)) {
return connection.BuildInfoKeywords();
}
throw ODB.InvalidRestrictionsDbInfoKeywords("restrictions");
}
if (connection.SupportSchemaRowset(schema)) {
return connection.GetSchemaRowset(schema, restrictions);
}
else {
using(IDBSchemaRowsetWrapper wrapper = connection.IDBSchemaRowset()) {
if (null == wrapper.Value) {
throw ODB.SchemaRowsetsNotSupported(Provider); // MDAC 72689
}
}
throw ODB.NotSupportedSchemaTable(schema, this); // MDAC 63279
}
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
internal DataTable GetSchemaRowset(Guid schema, object[] restrictions) {
Debug.Assert(null != GetOpenConnection(), "GetSchemaRowset closed");
return GetOpenConnection().GetSchemaRowset(schema, restrictions);
}
internal bool HasLiveReader(OleDbCommand cmd) {
bool result = false;
OleDbConnectionInternal openConnection = GetOpenConnection();
if (null != openConnection) {
result = openConnection.HasLiveReader(cmd);
}
return result;
}
internal void OnInfoMessage(UnsafeNativeMethods.IErrorInfo errorInfo, OleDbHResult errorCode) {
OleDbInfoMessageEventHandler handler = (OleDbInfoMessageEventHandler) Events[EventInfoMessage];
if (null != handler) {
try {
OleDbException exception = OleDbException.CreateException(errorInfo, errorCode, null);
OleDbInfoMessageEventArgs e = new OleDbInfoMessageEventArgs(exception);
if (Bid.TraceOn) {
Bid.Trace(" %d#, Message='%ls'\n", ObjectID, e.Message);
}
handler(this, e);
}
catch (Exception e) { // eat the exception
//
if (!ADP.IsCatchableOrSecurityExceptionType(e)) {
throw;
}
ADP.TraceExceptionWithoutRethrow(e);
}
}
#if DEBUG
else {
OleDbException exception = OleDbException.CreateException(errorInfo, errorCode, null);
Bid.Trace(" %d#, Message='%ls'\n", ObjectID, exception.Message);
}
#endif
}
override public void Open() {
InnerConnection.OpenConnection(this, ConnectionFactory);
// SQLBUDT #276132 - need to manually enlist in some cases, because
// native OLE DB doesn't know about SysTx transactions.
if ((0!=(ODB.DBPROPVAL_OS_TXNENLISTMENT & ((OleDbConnectionString)(this.ConnectionOptions)).OleDbServices))
&& ADP.NeedManualEnlistment()) {
GetOpenConnection().EnlistTransactionInternal(SysTx.Transaction.Current, true);
}
}
internal void SetDataSourcePropertyValue(Guid propertySet, int propertyID, string description, bool required, object value) {
CheckStateOpen(ADP.SetProperties);
OleDbHResult hr;
using(IDBPropertiesWrapper idbProperties = IDBProperties()) {
using(DBPropSet propSet = DBPropSet.CreateProperty(propertySet, propertyID, required, value)) {
Bid.Trace(" %d#\n", ObjectID);
hr = idbProperties.Value.SetProperties(propSet.PropertySetCount, propSet);
Bid.Trace(" %08X{HRESULT}\n", hr);
if (hr < 0) {
Exception e = OleDbConnection.ProcessResults(hr, null, this);
if (OleDbHResult.DB_E_ERRORSOCCURRED == hr) {
StringBuilder builder = new StringBuilder();
Debug.Assert(1 == propSet.PropertySetCount, "too many PropertySets");
tagDBPROP[] dbprops = propSet.GetPropertySet(0, out propertySet);
Debug.Assert(1 == dbprops.Length, "too many Properties");
ODB.PropsetSetFailure(builder, description, dbprops[0].dwStatus);
e = ODB.PropsetSetFailure(builder.ToString(), e);
}
if (null != e) {
throw e;
}
}
else {
SafeNativeMethods.Wrapper.ClearErrorInfo();
}
}
}
}
internal bool SupportSchemaRowset(Guid schema) {
return GetOpenConnection().SupportSchemaRowset(schema);
}
internal OleDbTransaction ValidateTransaction(OleDbTransaction transaction, string method) {
return GetOpenConnection().ValidateTransaction(transaction, method);
}
static internal Exception ProcessResults(OleDbHResult hresult, OleDbConnection connection, object src) {
if ((0 <= (int)hresult) && ((null == connection) || (null == connection.Events[EventInfoMessage]))) {
SafeNativeMethods.Wrapper.ClearErrorInfo();
return null;
}
// ErrorInfo object is to be checked regardless the hresult returned by the function called
Exception e = null;
UnsafeNativeMethods.IErrorInfo errorInfo = null;
OleDbHResult hr = UnsafeNativeMethods.GetErrorInfo(0, out errorInfo); // 0 - IErrorInfo exists, 1 - no IErrorInfo
if ((OleDbHResult.S_OK == hr) && (null != errorInfo)) {
if (hresult < 0) {
//
e = OleDbException.CreateException(errorInfo, hresult, null);
//}
if (OleDbHResult.DB_E_OBJECTOPEN == hresult) {
e = ADP.OpenReaderExists(e);
}
ResetState(connection);
}
else if (null != connection) {
connection.OnInfoMessage(errorInfo, hresult);
}
else {
Bid.Trace(" ErrorInfo available, but not connection %08X{HRESULT}\n", hresult);
}
Marshal.ReleaseComObject(errorInfo);
}
else if (0 < hresult) {
// @devnote: OnInfoMessage with no ErrorInfo
Bid.Trace(" ErrorInfo not available %08X{HRESULT}\n", hresult);
}
else if ((int)hresult < 0) {
e = ODB.NoErrorInformation((null != connection) ? connection.Provider : null, hresult, null); // OleDbException
ResetState(connection);
}
if (null != e) {
ADP.TraceExceptionAsReturnValue(e);
}
return e;
}
// @devnote: should be multithread safe
static public void ReleaseObjectPool() {
(new OleDbPermission(PermissionState.Unrestricted)).Demand();
IntPtr hscp;
Bid.ScopeEnter(out hscp, "\n");
try {
OleDbConnectionString.ReleaseObjectPool();
OleDbConnectionInternal.ReleaseObjectPool();
OleDbConnectionFactory.SingletonInstance.ClearAllPools();
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
static private void ResetState(OleDbConnection connection) {
if (null != connection) {
connection.ResetState();
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- RouteCollection.cs
- DiscoveryServiceExtension.cs
- CodeSubDirectoriesCollection.cs
- HighlightComponent.cs
- ChtmlMobileTextWriter.cs
- WebServiceData.cs
- Normalization.cs
- SqlSupersetValidator.cs
- EntityTransaction.cs
- LiteralControl.cs
- NotifyParentPropertyAttribute.cs
- BuildResultCache.cs
- RoutedEventArgs.cs
- SimpleWebHandlerParser.cs
- XmlNodeChangedEventArgs.cs
- Automation.cs
- AdornerHitTestResult.cs
- EntityContainerEmitter.cs
- RTLAwareMessageBox.cs
- MenuBase.cs
- DependencyObjectType.cs
- MbpInfo.cs
- JournalEntryListConverter.cs
- HtmlInputText.cs
- DBCommandBuilder.cs
- ProtectedConfigurationProviderCollection.cs
- OdbcConnectionPoolProviderInfo.cs
- SelectedDatesCollection.cs
- GetPageNumberCompletedEventArgs.cs
- TextRenderer.cs
- FontUnitConverter.cs
- ConstraintCollection.cs
- FileVersionInfo.cs
- EntityDataSourceChangingEventArgs.cs
- ColumnReorderedEventArgs.cs
- TableStyle.cs
- SiteMembershipCondition.cs
- IPPacketInformation.cs
- Section.cs
- SqlServer2KCompatibilityAnnotation.cs
- WebZone.cs
- QilDataSource.cs
- HandlerBase.cs
- CustomErrorsSection.cs
- TextEndOfLine.cs
- PopupControlService.cs
- BitmapEffect.cs
- InfoCardTraceRecord.cs
- SchemaMapping.cs
- TextEditorCharacters.cs
- HttpPostedFile.cs
- InternalCache.cs
- Merger.cs
- JulianCalendar.cs
- RequestResizeEvent.cs
- Viewport2DVisual3D.cs
- AuthenticateEventArgs.cs
- CommandCollectionEditor.cs
- ISessionStateStore.cs
- WSSecureConversation.cs
- DelegateSerializationHolder.cs
- EncoderNLS.cs
- Model3DGroup.cs
- HostExecutionContextManager.cs
- SBCSCodePageEncoding.cs
- QuaternionConverter.cs
- SiteMembershipCondition.cs
- ChannelSinkStacks.cs
- EmbeddedObject.cs
- Rules.cs
- Events.cs
- StringInfo.cs
- StaticFileHandler.cs
- WebContext.cs
- DataGridViewBand.cs
- PropertyDescriptorComparer.cs
- UInt16Converter.cs
- RtfControlWordInfo.cs
- Visual3DCollection.cs
- MsmqProcessProtocolHandler.cs
- MDIWindowDialog.cs
- Configuration.cs
- LinearGradientBrush.cs
- PostBackOptions.cs
- ResourceExpressionBuilder.cs
- SystemWebSectionGroup.cs
- PostBackOptions.cs
- MetadataHelper.cs
- MaskDescriptor.cs
- MenuItem.cs
- TypeNameHelper.cs
- FileLoadException.cs
- DbSourceCommand.cs
- PersonalizationDictionary.cs
- DataColumnMapping.cs
- WebBrowserBase.cs
- EditingCommands.cs
- SecurityState.cs
- SQLInt16Storage.cs
- DataGridViewCellParsingEventArgs.cs