Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WebForms / System / Web / UI / Design / WebControls / SqlDataSourceDesigner.cs / 1 / SqlDataSourceDesigner.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
namespace System.Web.UI.Design.WebControls {
using System;
using System.Collections;
using System.Collections.Specialized;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Data;
using System.Data.Common;
using System.ComponentModel.Design.Data;
using System.Design;
using System.Diagnostics;
using System.Drawing.Design;
using System.Globalization;
using System.IO;
using System.Web.UI;
using System.Web.UI.Design;
using System.Web.UI.Design.Util;
using System.Web.UI.WebControls;
using System.Windows.Forms;
using System.Windows.Forms.Design;
///
/// SqlDataSourceDesigner is the designer associated with a SqlDataSource.
///
[System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand, Flags=System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)]
public class SqlDataSourceDesigner : DataSourceDesigner {
internal const string AspNetDatabaseObjectPrefix = "AspNet_";
internal const string DefaultProviderName = "System.Data.SqlClient";
internal const string DefaultViewName = "DefaultView";
private const string DesignerStateDataSourceSchemaKey = "DataSourceSchema";
private const string DesignerStateDataSourceSchemaConnectionStringHashKey = "DataSourceSchemaConnectionStringHash";
private const string DesignerStateDataSourceSchemaProviderNameKey = "DataSourceSchemaProviderName";
private const string DesignerStateDataSourceSchemaSelectCommandKey = "DataSourceSchemaSelectMethod";
private const string DesignerStateTableQueryStateKey = "TableQueryState";
private const string DesignerStateSaveConfiguredConnectionStateKey = "SaveConfiguredConnectionState";
// Properties to be removed from the property grid at design time
// The SelectCommand is not hidden here, it is hidden separately
// because it has a special design time shadow property.
private static readonly string[] _hiddenProperties = new string[] {
"DeleteCommand",
"DeleteParameters",
"InsertCommand",
"InsertParameters",
"SelectParameters",
"UpdateCommand",
"UpdateParameters",
};
private DesignerDataSourceView _view;
// Indicates that when retrieving schema, the schema should be returned even
// if it is no longer consistent with the current state of the data source.
private bool _forceSchemaRetrieval;
///
///
public override bool CanConfigure {
get {
IDataEnvironment dataEnvironment = (IDataEnvironment)Component.Site.GetService(typeof(IDataEnvironment));
return (dataEnvironment != null);
}
}
///
///
public override bool CanRefreshSchema {
get {
string connectionString = ConnectionString;
return ((connectionString != null) &&
(connectionString.Trim().Length != 0) &&
(SelectCommand.Trim().Length != 0));
}
}
///
/// Implements the designer's version of the ConnectionString property.
/// This is used to shadow the ConnectionString property of the
/// runtime control.
///
public string ConnectionString {
get {
return GetConnectionString();
}
set {
if (value != ConnectionString) {
SqlDataSource.ConnectionString = value;
UpdateDesignTimeHtml();
OnDataSourceChanged(EventArgs.Empty);
}
}
}
///
/// Dummy design-time property.
///
[
Category("Data"),
DefaultValue(DataSourceOperation.Delete),
SRDescription(SR.SqlDataSourceDesigner_DeleteQuery),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
Editor(typeof(SqlDataSourceQueryEditor), typeof(UITypeEditor)),
MergableProperty(false),
TypeConverter(typeof(SqlDataSourceQueryConverter)),
]
public DataSourceOperation DeleteQuery {
get {
return DataSourceOperation.Delete;
}
set {
}
}
///
/// Dummy design-time property.
///
[
Category("Data"),
DefaultValue(DataSourceOperation.Insert),
SRDescription(SR.SqlDataSourceDesigner_InsertQuery),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
Editor(typeof(SqlDataSourceQueryEditor), typeof(UITypeEditor)),
MergableProperty(false),
TypeConverter(typeof(SqlDataSourceQueryConverter)),
]
public DataSourceOperation InsertQuery {
get {
return DataSourceOperation.Insert;
}
set {
}
}
///
/// Implements the designer's version of the ProviderName property.
/// This is used to shadow the ProviderName property of the
/// runtime control.
///
public string ProviderName {
get {
return SqlDataSource.ProviderName;
}
set {
if (value != ProviderName) {
SqlDataSource.ProviderName = value;
UpdateDesignTimeHtml();
OnDataSourceChanged(EventArgs.Empty);
}
}
}
///
/// Stores the state of the "Save Configured Connection" checkbox in
/// the wizard's panel.
///
internal bool SaveConfiguredConnectionState {
get {
object o = DesignerState[DesignerStateSaveConfiguredConnectionStateKey];
if (o == null) {
return true;
}
return (bool)o;
}
set {
DesignerState[DesignerStateSaveConfiguredConnectionStateKey] = value;
}
}
///
/// Implements the designer's version of the SelectCommand property.
/// This is used to shadow the SelectCommand property of the
/// runtime control.
///
public string SelectCommand {
get {
return SqlDataSource.SelectCommand;
}
set {
if (value != SelectCommand) {
SqlDataSource.SelectCommand = value;
UpdateDesignTimeHtml();
OnDataSourceChanged(EventArgs.Empty);
}
}
}
///
/// Dummy design-time property.
///
[
Category("Data"),
DefaultValue(DataSourceOperation.Select),
SRDescription(SR.SqlDataSourceDesigner_SelectQuery),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
Editor(typeof(SqlDataSourceQueryEditor), typeof(UITypeEditor)),
MergableProperty(false),
TypeConverter(typeof(SqlDataSourceQueryConverter)),
]
public DataSourceOperation SelectQuery {
get {
return DataSourceOperation.Select;
}
set {
}
}
///
/// The SqlDataSource associated with this designer.
///
internal SqlDataSource SqlDataSource {
get {
return (SqlDataSource)Component;
}
}
///
/// Stores the state of the Configure Data Source wizard's table/field
/// picker for smart re-entrancy.
///
internal Hashtable TableQueryState {
get {
return DesignerState[DesignerStateTableQueryStateKey] as Hashtable;
}
set {
DesignerState[DesignerStateTableQueryStateKey] = value;
}
}
///
/// Dummy design-time property.
///
[
Category("Data"),
DefaultValue(DataSourceOperation.Update),
SRDescription(SR.SqlDataSourceDesigner_UpdateQuery),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
Editor(typeof(SqlDataSourceQueryEditor), typeof(UITypeEditor)),
MergableProperty(false),
TypeConverter(typeof(SqlDataSourceQueryConverter)),
]
public DataSourceOperation UpdateQuery {
get {
return DataSourceOperation.Update;
}
set {
}
}
///
/// Builds a select command with associated parameters.
///
internal DbCommand BuildSelectCommand(DbProviderFactory factory, DbConnection connection, string commandText, ParameterCollection parameters, SqlDataSourceCommandType commandType) {
//
DbCommand command = CreateCommand(factory, commandText, connection);
// Add parameters, if any
if (parameters != null && parameters.Count > 0) {
IOrderedDictionary parameterValues = parameters.GetValues(null, null);
string parameterPrefix = GetParameterPrefix(factory);
for (int i = 0; i < parameters.Count; i++ ) {
Parameter parameter = parameters[i];
DbParameter dbParam = CreateParameter(factory);
dbParam.ParameterName = parameterPrefix + parameter.Name;
if (parameter.Type != TypeCode.Empty && parameter.Type != TypeCode.DBNull) {
dbParam.DbType = ConvertTypeCodeToDbType(parameter.Type);
}
if (parameter.Type == TypeCode.Empty && ProviderRequiresDbTypeSet(factory)) {
// VSWhidbey 493918: ODBC and OLE DB apparently require that the type of the
// parameter be set explicitly, so we just set is to Object.
dbParam.DbType = DbType.Object;
}
dbParam.Value = parameterValues[i];
if (dbParam.Value == null) {
dbParam.Value = DBNull.Value;
}
// For some providers, variable length types require explicit sizes
if (parameter.Type == TypeCode.String) {
if ((dbParam.Value is string) && (dbParam.Value != null)) {
dbParam.Size = ((string)dbParam.Value).Length;
}
else {
dbParam.Size = 1;
}
}
command.Parameters.Add(dbParam);
}
}
// Set commmand type
command.CommandType = GetCommandType(commandType);
return command;
}
///
/// Handles the Configure DataSource designer verb event.
///
public override void Configure() {
InvokeTransactedChange(Component, new TransactedChangeCallback(ConfigureDataSourceChangeCallback), null, SR.GetString(SR.DataSource_ConfigureTransactionDescription));
}
///
/// Transacted change callback to invoke the Configure DataSource wizard.
///
private bool ConfigureDataSourceChangeCallback(object context) {
try {
SuppressDataSourceEvents();
IServiceProvider site = Component.Site;
IDataEnvironment dataEnvironment = (IDataEnvironment)site.GetService(typeof(IDataEnvironment));
if (dataEnvironment == null) {
Debug.Fail("Cannot launch Configure DataSource Wizard without IDataEnvironment service");
return false;
}
IDataSourceViewSchema oldViewSchema = GetView(DefaultViewName).Schema;
bool wasForceUsed = false;
if (oldViewSchema == null) {
_forceSchemaRetrieval = true;
oldViewSchema = GetView(DefaultViewName).Schema;
_forceSchemaRetrieval = false;
if (oldViewSchema != null) {
// Only consider it to be a "forced" schema retrieval if we actually got something out of it
wasForceUsed = true;
}
}
SqlDataSourceWizardForm form = CreateConfigureDataSourceWizardForm(site, dataEnvironment);
DialogResult result = UIServiceHelper.ShowDialog(site, form);
if (result == DialogResult.OK) {
// We force this call to make sure that expression-bound properties such as
// ConnectionString and ProviderName get updated with their evaluated values.
OnComponentChanged(this, new ComponentChangedEventArgs(Component, null, null, null));
// Compare new schema to old schema and if it changed, raise the SchemaRefreshed event
IDataSourceViewSchema newViewSchema = null;
try {
_forceSchemaRetrieval = true;
newViewSchema = GetView(DefaultViewName).Schema;
}
finally {
_forceSchemaRetrieval = false;
}
if (!wasForceUsed && !ViewSchemasEquivalent(oldViewSchema, newViewSchema)) {
OnSchemaRefreshed(EventArgs.Empty);
}
OnDataSourceChanged(EventArgs.Empty);
return true;
}
else {
return false;
}
}
finally {
ResumeDataSourceEvents();
}
}
///
/// Returns true if these two connections are equivalent. Currently the
/// check is to make sure they use the exact same connection string and
/// provider, though this could potentially be improved to check for
/// the specific database and server.
///
internal static bool ConnectionsEqual(DesignerDataConnection connection1, DesignerDataConnection connection2) {
Debug.Assert((connection1 != null) || (connection2 != null), "At least one of the connections must be non null");
// If either connection is null, these are not the same connection
if ((connection1 == null) || (connection2 == null)) {
return false;
}
// Compare connection strings
if (connection1.ConnectionString != connection2.ConnectionString) {
return false;
}
// Compare provider names, taking into account the default provider
string providerName1 = (connection1.ProviderName.Trim().Length == 0 ? DefaultProviderName : connection1.ProviderName);
string providerName2 = (connection2.ProviderName.Trim().Length == 0 ? DefaultProviderName : connection2.ProviderName);
return (providerName1 == providerName2);
}
///
/// Gets the equivalent TypeCode from a DbType.
///
internal static TypeCode ConvertDbTypeToTypeCode(DbType dbType) {
switch (dbType) {
case DbType.AnsiString:
case DbType.AnsiStringFixedLength:
case DbType.String:
case DbType.StringFixedLength:
return TypeCode.String;
case DbType.Boolean:
return TypeCode.Boolean;
case DbType.Byte:
return TypeCode.Byte;
case DbType.VarNumeric: // ???
case DbType.Currency:
case DbType.Decimal:
return TypeCode.Decimal;
case DbType.Date:
case DbType.DateTime:
case DbType.Time:
return TypeCode.DateTime;
case DbType.Double:
return TypeCode.Double;
case DbType.Int16:
return TypeCode.Int16;
case DbType.Int32:
return TypeCode.Int32;
case DbType.Int64:
return TypeCode.Int64;
case DbType.SByte:
return TypeCode.SByte;
case DbType.Single:
return TypeCode.Single;
case DbType.UInt16:
return TypeCode.UInt16;
case DbType.UInt32:
return TypeCode.UInt32;
case DbType.UInt64:
return TypeCode.UInt64;
case DbType.Guid: // ???
case DbType.Binary:
case DbType.Object:
default:
return TypeCode.Object;
}
}
///
/// Gets the equivalent DbType from a TypeCode.
///
internal static DbType ConvertTypeCodeToDbType(TypeCode typeCode) {
switch (typeCode) {
case TypeCode.Boolean:
return DbType.Boolean;
case TypeCode.Byte:
return DbType.Byte;
case TypeCode.Char:
return DbType.StringFixedLength; // ???
case TypeCode.DateTime:
return DbType.DateTime;
case TypeCode.Decimal:
return DbType.Decimal;
case TypeCode.Double:
return DbType.Double;
case TypeCode.Int16:
return DbType.Int16;
case TypeCode.Int32:
return DbType.Int32;
case TypeCode.Int64:
return DbType.Int64;
case TypeCode.SByte:
return DbType.SByte;
case TypeCode.Single:
return DbType.Single;
case TypeCode.String:
return DbType.String;
case TypeCode.UInt16:
return DbType.UInt16;
case TypeCode.UInt32:
return DbType.UInt32;
case TypeCode.UInt64:
return DbType.UInt64;
case TypeCode.DBNull:
case TypeCode.Empty:
case TypeCode.Object:
default:
return DbType.Object;
}
}
///
/// Copies an ICollection of ICloneable items to another IList.
///
internal void CopyList(ICollection source, IList dest) {
dest.Clear();
foreach (ICloneable item in source) {
object clonedItem = item.Clone();
RegisterClone(item, clonedItem);
dest.Add(clonedItem);
}
}
///
/// Creates the appropriate wizard for the Configure Data Source task.
///
internal virtual SqlDataSourceWizardForm CreateConfigureDataSourceWizardForm(IServiceProvider serviceProvider, IDataEnvironment dataEnvironment) {
return new SqlDataSourceWizardForm(serviceProvider, this, dataEnvironment);
}
///
/// Creates an DbCommand based on the ProviderName.
///
internal static DbCommand CreateCommand(DbProviderFactory factory, string commandText, DbConnection connection) {
DbCommand command = factory.CreateCommand();
command.CommandText = commandText;
command.Connection = connection;
return command;
}
///
/// Creates an DbDataAdapter based on the ProviderName.
///
internal static DbDataAdapter CreateDataAdapter(DbProviderFactory factory, DbCommand command) {
DbDataAdapter dataAdapter = factory.CreateDataAdapter();
((IDbDataAdapter)dataAdapter).SelectCommand = command;
return dataAdapter;
}
///
/// Creates an DbParameter based on the ProviderName.
///
internal static DbParameter CreateParameter(DbProviderFactory factory) {
return factory.CreateParameter();
}
protected virtual SqlDesignerDataSourceView CreateView(string viewName) {
return new SqlDesignerDataSourceView(this, viewName);
}
///
/// Calls the appropriate CommandBuilder (e.g. SqlCommandBuilder) to derive the parameters of a stored procedure.
///
protected virtual void DeriveParameters(string providerName, DbCommand command) {
//
if (String.Equals(providerName, "System.Data.Odbc", StringComparison.OrdinalIgnoreCase)) {
System.Data.Odbc.OdbcCommandBuilder.DeriveParameters((System.Data.Odbc.OdbcCommand)command);
}
else {
if (String.Equals(providerName, "System.Data.OleDb", StringComparison.OrdinalIgnoreCase)) {
System.Data.OleDb.OleDbCommandBuilder.DeriveParameters((System.Data.OleDb.OleDbCommand)command);
}
else {
if (String.Equals(providerName, "System.Data.SqlClient", StringComparison.OrdinalIgnoreCase) ||
String.IsNullOrEmpty(providerName)) {
System.Data.SqlClient.SqlCommandBuilder.DeriveParameters((System.Data.SqlClient.SqlCommand)command);
}
else {
UIServiceHelper.ShowError(
SqlDataSource.Site,
SR.GetString(SR.SqlDataSourceDesigner_InferStoredProcedureNotSupported, providerName));
}
}
}
}
///
/// Converts a SqlDataSourceCommandType to a System.Data.CommandType.
///
private static CommandType GetCommandType(SqlDataSourceCommandType commandType) {
if (commandType == SqlDataSourceCommandType.Text) {
return CommandType.Text;
}
return CommandType.StoredProcedure;
}
///
/// Gets the data source's connection string. Override this if the data source
/// has to perform any additional operations in order for the connection string
/// to be retrieved. By default this method returns the runtime control's
/// connection string.
///
protected virtual string GetConnectionString() {
return SqlDataSource.ConnectionString;
}
///
/// Gets the DbProviderFactory associated with the provider type specified in the ProviderName property.
/// If no provider is specified, the System.Data.SqlClient factory is used.
///
internal static DbProviderFactory GetDbProviderFactory(string providerName) {
// Default to SQL provider
if (providerName.Length == 0) {
providerName = DefaultProviderName;
}
DbProviderFactory factory = DbProviderFactories.GetFactory(providerName);
Debug.Assert(factory != null);
return factory;
}
///
/// Gets a design-time version of a given connection. This might
/// involve using an alternate set of credentials or mapping paths
/// in the connection string such that they are valid at design time.
///
internal static DbConnection GetDesignTimeConnection(IServiceProvider serviceProvider, DesignerDataConnection connection) {
if (serviceProvider != null) {
IDataEnvironment de = (IDataEnvironment)serviceProvider.GetService(typeof(IDataEnvironment));
if (de != null) {
if (String.IsNullOrEmpty(connection.ProviderName)) {
connection = new DesignerDataConnection(connection.Name, DefaultProviderName, connection.ConnectionString);
}
return de.GetDesignTimeConnection(connection);
}
}
return null;
}
public override DesignerDataSourceView GetView(string viewName) {
if (String.IsNullOrEmpty(viewName)) {
viewName = DefaultViewName;
}
if (String.Equals(viewName, DefaultViewName, StringComparison.OrdinalIgnoreCase)) {
if (_view == null) {
_view = CreateView(viewName);
}
return _view;
}
return null;
}
public override string[] GetViewNames() {
return new string[] { DefaultViewName };
}
///
/// Indicates the prefix for parameter placeholders (as used in
/// DbCommand.CommandText property).
///
internal static string GetParameterPlaceholderPrefix(DbProviderFactory factory) {
if (factory == null) {
throw new ArgumentNullException("factory");
}
//
if (factory == System.Data.SqlClient.SqlClientFactory.Instance) {
return "@";
}
else {
if (factory == System.Data.OracleClient.OracleClientFactory.Instance) {
return ":";
}
else {
return "?";
}
}
}
///
/// Indicates the prefix for parameters (as used in the
/// DbCommand.Parameters collection).
///
internal static string GetParameterPrefix(DbProviderFactory factory) {
if (factory == null) {
throw new ArgumentNullException("factory");
}
//
if (factory == System.Data.SqlClient.SqlClientFactory.Instance) {
return "@";
}
else {
return String.Empty;
}
}
///
/// Returns an array of all known parameter prefixes.
///
private static string[] GetParameterPrefixes() {
return new string[] { "@", "?", ":" };
}
///
/// Gets an array of Parameter objects from a SqlDataSource's command.
/// If the command text indicates a stored procedure, a call will be made to the server
/// to get the parameter types. Otherwise a SQL parser is used to extract the parameter
/// names.
///
protected internal virtual Parameter[] InferParameterNames(DesignerDataConnection connection, string commandText, SqlDataSourceCommandType commandType) {
Cursor originalCursor = Cursor.Current;
try {
Cursor.Current = Cursors.WaitCursor;
if (commandText.Length == 0) {
UIServiceHelper.ShowError(
SqlDataSource.Site,
SR.GetString(SR.SqlDataSourceDesigner_NoCommand));
return null;
}
if (commandType == SqlDataSourceCommandType.Text) {
// Command text
return SqlDataSourceParameterParser.ParseCommandText(connection.ProviderName, commandText);
}
else {
// Stored procedure
DbProviderFactory factory = GetDbProviderFactory(connection.ProviderName);
DbConnection conn = null;
try {
conn = GetDesignTimeConnection(Component.Site, connection);
}
catch (Exception ex) {
if (conn == null) {
UIServiceHelper.ShowError(
SqlDataSource.Site,
ex,
SR.GetString(SR.SqlDataSourceDesigner_CouldNotCreateConnection));
return null;
}
}
if (conn == null) {
UIServiceHelper.ShowError(
SqlDataSource.Site,
SR.GetString(SR.SqlDataSourceDesigner_CouldNotCreateConnection));
return null;
}
DbCommand command = BuildSelectCommand(factory, conn, commandText, null, commandType);
command.CommandType = CommandType.StoredProcedure;
try {
Debug.Assert(conn.State == ConnectionState.Open, "Expected connection state to be open - IDataEnvironment.GetDesignTimeConnection() should have done this");
DeriveParameters(connection.ProviderName, command);
}
catch (Exception ex) {
// If there were any errors in deriving the parameters, abort
// the entire operation.
UIServiceHelper.ShowError(
SqlDataSource.Site,
SR.GetString(SR.SqlDataSourceDesigner_InferStoredProcedureError, ex.Message));
return null;
}
finally {
if (command.Connection.State == ConnectionState.Open) {
conn.Close();
}
}
int paramCount = command.Parameters.Count;
Parameter[] derivedParameters = new Parameter[paramCount];
for (int i = 0; i < paramCount; i++) {
IDataParameter parameter = command.Parameters[i] as IDataParameter;
if (parameter != null) {
// Trim parameter prefix if present
string paramName = StripParameterPrefix(parameter.ParameterName);
// Convert type from DB type to CLR type
TypeCode type = ConvertDbTypeToTypeCode(parameter.DbType);
derivedParameters[i] = new Parameter(paramName, type);
derivedParameters[i].Direction = parameter.Direction;
}
else {
//
Debug.Fail("Parameter is not an IDataParameter");
}
}
return derivedParameters;
}
}
finally {
Cursor.Current = originalCursor;
}
}
///
/// Attempts to load the schema for this SqlDataSource. If the
/// schema is not consistent with the current properties, then it is
/// removed from state.
///
internal DataTable LoadSchema() {
if (!_forceSchemaRetrieval) {
// Only check for consistency if we are not forcing the retrieval
object connectionStringHash = DesignerState[DesignerStateDataSourceSchemaConnectionStringHashKey];
string providerName = DesignerState[DesignerStateDataSourceSchemaProviderNameKey] as string;
string selectCommand = DesignerState[DesignerStateDataSourceSchemaSelectCommandKey] as string;
if (String.IsNullOrEmpty(providerName)) {
providerName = DefaultProviderName;
}
if (String.IsNullOrEmpty(ConnectionString)) {
// If there is no connection string, we definitely don't have any schema
return null;
}
DesignerDataConnection oldConnection = new DesignerDataConnection(String.Empty, ProviderName, ConnectionString);
string oldConnectionString = oldConnection.ConnectionString;
int oldConnectionStringHash = oldConnectionString.GetHashCode();
string oldProviderName = oldConnection.ProviderName;
string oldSelectCommand = SelectCommand;
if (String.IsNullOrEmpty(oldProviderName)) {
oldProviderName = DefaultProviderName;
}
if ((connectionStringHash == null) ||
((int)connectionStringHash != oldConnectionStringHash) ||
(!String.Equals(providerName, oldProviderName, StringComparison.OrdinalIgnoreCase)) ||
(!String.Equals(selectCommand, oldSelectCommand, StringComparison.Ordinal))) {
// The schema is not consistent with the current properties, return nothing
return null;
}
}
// Either we are forcing schema retrieval, or we're not forcing but we're consistent, so get the schema
DataTable schema = DesignerState[DesignerStateDataSourceSchemaKey] as DataTable;
if (schema != null) {
schema.TableName = DefaultViewName;
return schema;
}
else {
return null;
}
}
///
/// Overridden by the designer to shadow various runtime properties
/// with corresponding properties that it implements.
///
protected override void PreFilterProperties(IDictionary properties) {
base.PreFilterProperties(properties);
PropertyDescriptor property;
// Hide runtime properties
foreach (string propertyName in _hiddenProperties) {
property = (PropertyDescriptor)properties[propertyName];
if (property != null) {
properties[propertyName] = TypeDescriptor.CreateProperty(property.ComponentType, property, BrowsableAttribute.No);
}
}
// Add design-time properties
properties["DeleteQuery"] = TypeDescriptor.CreateProperty(
GetType(),
"DeleteQuery",
typeof(DataSourceOperation));
properties["InsertQuery"] = TypeDescriptor.CreateProperty(
GetType(),
"InsertQuery",
typeof(DataSourceOperation));
properties["SelectQuery"] = TypeDescriptor.CreateProperty(
GetType(),
"SelectQuery",
typeof(DataSourceOperation));
properties["UpdateQuery"] = TypeDescriptor.CreateProperty(
GetType(),
"UpdateQuery",
typeof(DataSourceOperation));
// Shadow runtime ConnectionString property
property = (PropertyDescriptor)properties["ConnectionString"];
Debug.Assert(property != null);
properties["ConnectionString"] = TypeDescriptor.CreateProperty(this.GetType(), property, new Attribute[0]);
// Shadow runtime ProviderName property
property = (PropertyDescriptor)properties["ProviderName"];
Debug.Assert(property != null);
properties["ProviderName"] = TypeDescriptor.CreateProperty(this.GetType(), property, new Attribute[0]);
// Shadow runtime SelectCommand property
property = (PropertyDescriptor)properties["SelectCommand"];
Debug.Assert(property != null);
properties["SelectCommand"] = TypeDescriptor.CreateProperty(this.GetType(), property, BrowsableAttribute.No);
}
///
/// Returns true is the provider requires that the DbType property of a DbParameter
/// be set explicitly.
///
private static bool ProviderRequiresDbTypeSet(DbProviderFactory factory) {
return (factory == System.Data.OleDb.OleDbFactory.Instance ||
factory == System.Data.Odbc.OdbcFactory.Instance);
}
///
/// Refreshes the data source's schema. Override this method to perform whatever actions are necessary
/// for the Schema property to return correct schema.
///
public override void RefreshSchema(bool preferSilent) {
try {
SuppressDataSourceEvents();
bool success = false;
IServiceProvider site = SqlDataSource.Site;
// If the data source is not yet set up, abort the Refresh Schema operation
if (!CanRefreshSchema) {
if (!preferSilent) {
UIServiceHelper.ShowError(
site,
SR.GetString(SR.SqlDataSourceDesigner_RefreshSchemaRequiresSettings));
}
return;
}
IDataSourceViewSchema oldViewSchema = GetView(DefaultViewName).Schema;
bool wasForceUsed = false;
if (oldViewSchema == null) {
_forceSchemaRetrieval = true;
oldViewSchema = GetView(DefaultViewName).Schema;
_forceSchemaRetrieval = false;
wasForceUsed = true;
}
DesignerDataConnection runtimeConnection = new DesignerDataConnection(String.Empty, ProviderName, ConnectionString);
if (preferSilent) {
// Silent mode - just get schema directly, and ignore errors
success = RefreshSchema(runtimeConnection, SelectCommand, SqlDataSource.SelectCommandType, SqlDataSource.SelectParameters, true);
}
else {
// Non-silent mode - show UI to get parameter information
// Infer parameters
Parameter[] inferedParameters = InferParameterNames(runtimeConnection, SelectCommand, SqlDataSource.SelectCommandType);
// A null return value implies there was a problem retrieving parameters
if (inferedParameters == null) {
return;
}
ParameterCollection inputParameters = new ParameterCollection();
ParameterCollection existingParameters = new ParameterCollection();
foreach (ICloneable param in SqlDataSource.SelectParameters) {
existingParameters.Add((Parameter)param.Clone());
}
// Filter out all non-input parameters
foreach (Parameter inferedParameter in inferedParameters) {
if ((inferedParameter.Direction == ParameterDirection.Input) ||
(inferedParameter.Direction == ParameterDirection.InputOutput)) {
// Try to match this parameter with an existing parameter so we
// can automatically pick up on a previously set default value
// or type.
Parameter existingParameter = existingParameters[inferedParameter.Name];
if (existingParameter != null) {
inferedParameter.DefaultValue = existingParameter.DefaultValue;
if (inferedParameter.Type == TypeCode.Empty) {
inferedParameter.Type = existingParameter.Type;
}
existingParameters.Remove(existingParameter);
}
inputParameters.Add(inferedParameter);
}
}
if (inputParameters.Count > 0) {
SqlDataSourceRefreshSchemaForm form = new SqlDataSourceRefreshSchemaForm(site, this, inputParameters);
DialogResult result = UIServiceHelper.ShowDialog(site, form);
success = (result == DialogResult.OK);
}
else {
success = RefreshSchema(runtimeConnection, SelectCommand, SqlDataSource.SelectCommandType, inputParameters, false);
}
}
if (success) {
// Compare new schema to old schema and if it changed, raise the SchemaRefreshed event
IDataSourceViewSchema newViewSchema = GetView(DefaultViewName).Schema;
if (wasForceUsed && ViewSchemasEquivalent(oldViewSchema, newViewSchema)) {
OnDataSourceChanged(EventArgs.Empty);
}
else {
if (!ViewSchemasEquivalent(oldViewSchema, newViewSchema)) {
OnSchemaRefreshed(EventArgs.Empty);
}
}
}
}
finally {
ResumeDataSourceEvents();
}
}
///
/// Refreshes the schema of the data source.
///
internal bool RefreshSchema(DesignerDataConnection connection, string commandText, SqlDataSourceCommandType commandType, ParameterCollection parameters, bool preferSilent) {
IServiceProvider site = SqlDataSource.Site;
// Get schema from database
DbCommand selectCommand = null;
try {
DbProviderFactory factory = GetDbProviderFactory(connection.ProviderName);
DbConnection conn = GetDesignTimeConnection(Component.Site, connection);
if (conn == null) {
if (!preferSilent) {
UIServiceHelper.ShowError(
SqlDataSource.Site,
SR.GetString(SR.SqlDataSourceDesigner_CouldNotCreateConnection));
}
return false;
}
selectCommand = BuildSelectCommand(factory, conn, commandText, parameters, commandType);
DbDataAdapter adapter = CreateDataAdapter(factory, selectCommand);
adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
DataSet dataSet = new DataSet();
adapter.FillSchema(dataSet, SchemaType.Source, DefaultViewName);
// Some providers, such as Microsoft JET, do not necessarily throw an exception
// when they are unable to retrieve schema. Instead, they silently fail, so we
// have to check if they returned a schema table.
DataTable schemaTable = dataSet.Tables[DefaultViewName];
if (schemaTable == null) {
if (!preferSilent) {
UIServiceHelper.ShowError(site, SR.GetString(SR.SqlDataSourceDesigner_CannotGetSchema));
}
return false;
}
// Save the schema using the state service
SaveSchema(connection, commandText, schemaTable);
return true;
}
catch (Exception ex) {
if (!preferSilent) {
UIServiceHelper.ShowError(site, ex, SR.GetString(SR.SqlDataSourceDesigner_CannotGetSchema));
}
}
finally {
if (selectCommand != null && selectCommand.Connection.State == ConnectionState.Open) {
selectCommand.Connection.Close();
}
}
return false;
}
///
/// Saves schema using the DesignerState. Along with the schema are
/// stored the type and method used to generate the schema so that we
/// can make sure the schema is consistent.
///
private void SaveSchema(DesignerDataConnection connection, string selectCommand, DataTable schemaTable) {
DesignerState[DesignerStateDataSourceSchemaKey] = schemaTable;
DesignerState[DesignerStateDataSourceSchemaConnectionStringHashKey] = connection.ConnectionString.GetHashCode();
DesignerState[DesignerStateDataSourceSchemaProviderNameKey] = connection.ProviderName;
DesignerState[DesignerStateDataSourceSchemaSelectCommandKey] = selectCommand;
}
///
/// Strips all known parameter prefixes from a parameter name.
///
internal static string StripParameterPrefix(string parameterName) {
foreach (string prefix in GetParameterPrefixes()) {
if (parameterName.StartsWith(prefix, StringComparison.OrdinalIgnoreCase)) {
return parameterName.Substring(prefix.Length);
}
}
return parameterName;
}
///
/// Indicates whether the provider supports named parameters.
///
internal static bool SupportsNamedParameters(DbProviderFactory factory) {
if (factory == null) {
throw new ArgumentNullException("factory");
}
//
if ((factory == System.Data.SqlClient.SqlClientFactory.Instance) ||
(factory == System.Data.OracleClient.OracleClientFactory.Instance)) {
return true;
}
else {
return false;
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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