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/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / Data / System / Data / Odbc / OdbcCommandBuilder.cs / 1 / OdbcCommandBuilder.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Data.Common; using System.Data.ProviderBase; using System.Diagnostics; using System.Runtime.InteropServices; using System.Threading; using System.Globalization; using System.Text; namespace System.Data.Odbc { #if WINFSInternalOnly internal #else public #endif sealed class OdbcCommandBuilder : DbCommandBuilder { public OdbcCommandBuilder() : base() { GC.SuppressFinalize(this); } public OdbcCommandBuilder(OdbcDataAdapter adapter) : this() { DataAdapter = adapter; } [ DefaultValue(null), ResCategoryAttribute(Res.DataCategory_Update), ResDescriptionAttribute(Res.OdbcCommandBuilder_DataAdapter), // MDAC 60524 ] new public OdbcDataAdapter DataAdapter { get { return (base.DataAdapter as OdbcDataAdapter); } set { base.DataAdapter = value; } } private void OdbcRowUpdatingHandler(object sender, OdbcRowUpdatingEventArgs ruevent) { RowUpdatingHandler(ruevent); } new public OdbcCommand GetInsertCommand() { return (OdbcCommand) base.GetInsertCommand(); } new public OdbcCommand GetInsertCommand(bool useColumnsForParameterNames) { return (OdbcCommand) base.GetInsertCommand(useColumnsForParameterNames); } new public OdbcCommand GetUpdateCommand() { return (OdbcCommand) base.GetUpdateCommand(); } new public OdbcCommand GetUpdateCommand(bool useColumnsForParameterNames) { return (OdbcCommand) base.GetUpdateCommand(useColumnsForParameterNames); } new public OdbcCommand GetDeleteCommand() { return (OdbcCommand) base.GetDeleteCommand(); } new public OdbcCommand GetDeleteCommand(bool useColumnsForParameterNames) { return (OdbcCommand) base.GetDeleteCommand(useColumnsForParameterNames); } override protected string GetParameterName(int parameterOrdinal) { return "p" + parameterOrdinal.ToString(System.Globalization.CultureInfo.InvariantCulture); } override protected string GetParameterName(string parameterName) { return parameterName; } override protected string GetParameterPlaceholder(int parameterOrdinal) { return "?"; } override protected void ApplyParameterInfo(DbParameter parameter, DataRow datarow, StatementType statementType, bool whereClause) { OdbcParameter p = (OdbcParameter) parameter; object valueType = datarow[SchemaTableColumn.ProviderType]; p.OdbcType = (OdbcType) valueType; object bvalue = datarow[SchemaTableColumn.NumericPrecision]; if (DBNull.Value != bvalue) { byte bval = (byte)(short)bvalue; p.PrecisionInternal = ((0xff != bval) ? bval : (byte)0); } bvalue = datarow[SchemaTableColumn.NumericScale]; if (DBNull.Value != bvalue) { byte bval = (byte)(short)bvalue; p.ScaleInternal = ((0xff != bval) ? bval : (byte)0); } } static public void DeriveParameters(OdbcCommand command) { // MDAC 65927 OdbcConnection.ExecutePermission.Demand(); if (null == command) { throw ADP.ArgumentNull("command"); } switch (command.CommandType) { case System.Data.CommandType.Text: throw ADP.DeriveParametersNotSupported(command); case System.Data.CommandType.StoredProcedure: break; case System.Data.CommandType.TableDirect: // CommandType.TableDirect - do nothing, parameters are not supported throw ADP.DeriveParametersNotSupported(command); default: throw ADP.InvalidCommandType(command.CommandType); } if (ADP.IsEmpty(command.CommandText)) { throw ADP.CommandTextRequired(ADP.DeriveParameters); } OdbcConnection connection = command.Connection; if (null == connection) { throw ADP.ConnectionRequired(ADP.DeriveParameters); } ConnectionState state = connection.State; if (ConnectionState.Open != state) { throw ADP.OpenConnectionRequired(ADP.DeriveParameters, state); } OdbcParameter[] list = DeriveParametersFromStoredProcedure(connection, command); OdbcParameterCollection parameters = command.Parameters; parameters.Clear(); int count = list.Length; if (0 < count) { for(int i = 0; i < list.Length; ++i) { parameters.Add(list[i]); } } } // DeriveParametersFromStoredProcedure ( // OdbcConnection connection, // OdbcCommand command); // // Uses SQLProcedureColumns to create an array of OdbcParameters // static private OdbcParameter[] DeriveParametersFromStoredProcedure(OdbcConnection connection, OdbcCommand command) { ListrParams = new List (); // following call ensures that the command has a statement handle allocated CMDWrapper cmdWrapper = command.GetStatementHandle(); OdbcStatementHandle hstmt = cmdWrapper.StatementHandle; int cColsAffected; // maps an enforced 4-part qualified string as follows // parts[0] = null - ignored but removal would be a run-time breaking change from V1.0 // parts[1] = CatalogName (optional, may be null) // parts[2] = SchemaName (optional, may be null) // parts[3] = ProcedureName // string quote = connection.QuoteChar(ADP.DeriveParameters); string[] parts = MultipartIdentifier.ParseMultipartIdentifier(command.CommandText, quote, quote, '.', 4, true, Res.ODBC_ODBCCommandText, false); if (null == parts[3]) { // match everett behavior, if the commandtext is nothing but whitespace set the command text to the whitespace parts[3] = command.CommandText; } // note: native odbc appears to ignore all but the procedure name ODBC32.RetCode retcode = hstmt.ProcedureColumns(parts[1], parts[2], parts[3], null); // Note: the driver does not return an error if the given stored procedure does not exist // therefore we cannot handle that case and just return not parameters. if (ODBC32.RetCode.SUCCESS != retcode) { connection.HandleError(hstmt, retcode); } using (OdbcDataReader reader = new OdbcDataReader(command, cmdWrapper, CommandBehavior.Default)) { reader.FirstResult(); cColsAffected = reader.FieldCount; // go through the returned rows and filter out relevant parameter data // while (reader.Read()) { // devnote: column types are specified in the ODBC Programmer's Reference // COLUMN_TYPE Smallint 16bit // COLUMN_SIZE Integer 32bit // DECIMAL_DIGITS Smallint 16bit // NUM_PREC_RADIX Smallint 16bit OdbcParameter parameter = new OdbcParameter(); parameter.ParameterName = reader.GetString(ODBC32.COLUMN_NAME-1); switch ((ODBC32.SQL_PARAM)reader.GetInt16(ODBC32.COLUMN_TYPE-1)){ case ODBC32.SQL_PARAM.INPUT: parameter.Direction = ParameterDirection.Input; break; case ODBC32.SQL_PARAM.OUTPUT: parameter.Direction = ParameterDirection.Output; break; case ODBC32.SQL_PARAM.INPUT_OUTPUT: parameter.Direction = ParameterDirection.InputOutput; break; case ODBC32.SQL_PARAM.RETURN_VALUE: parameter.Direction = ParameterDirection.ReturnValue; break; default: Debug.Assert(false, "Unexpected Parametertype while DeriveParamters"); break; } parameter.OdbcType = TypeMap.FromSqlType((ODBC32.SQL_TYPE)reader.GetInt16(ODBC32.DATA_TYPE-1))._odbcType; parameter.Size = (int)reader.GetInt32(ODBC32.COLUMN_SIZE-1); switch(parameter.OdbcType){ case OdbcType.Decimal: case OdbcType.Numeric: parameter.ScaleInternal = (Byte)reader.GetInt16(ODBC32.DECIMAL_DIGITS-1); parameter.PrecisionInternal = (Byte)reader.GetInt16(ODBC32.NUM_PREC_RADIX-1); break; } rParams.Add (parameter); } } retcode = hstmt.CloseCursor(); return rParams.ToArray();; } public override string QuoteIdentifier(string unquotedIdentifier){ return QuoteIdentifier(unquotedIdentifier,null); } public string QuoteIdentifier( string unquotedIdentifier, OdbcConnection connection){ ADP.CheckArgumentNull(unquotedIdentifier, "unquotedIdentifier"); // if the user has specificed a prefix use the user specified prefix and suffix // otherwise get them from the provider string quotePrefix = QuotePrefix; string quoteSuffix = QuoteSuffix; if (ADP.IsEmpty(quotePrefix) == true) { if (connection == null) { throw ADP.QuotePrefixNotSet(ADP.QuoteIdentifier); } quotePrefix = connection.QuoteChar(ADP.QuoteIdentifier); quoteSuffix = quotePrefix; } // by the ODBC spec "If the data source does not support quoted identifiers, a blank is returned." // So if a blank is returned the string is returned unchanged. Otherwise the returned string is used // to quote the string if ((ADP.IsEmpty(quotePrefix) == false) && (quotePrefix != " ")) { return ADP.BuildQuotedString(quotePrefix,quoteSuffix,unquotedIdentifier); } else { return unquotedIdentifier; } } override protected void SetRowUpdatingHandler(DbDataAdapter adapter) { Debug.Assert(adapter is OdbcDataAdapter, "!OdbcDataAdapter"); if (adapter == base.DataAdapter) { // removal case ((OdbcDataAdapter)adapter).RowUpdating -= OdbcRowUpdatingHandler; } else { // adding case ((OdbcDataAdapter)adapter).RowUpdating += OdbcRowUpdatingHandler; } } public override string UnquoteIdentifier( string quotedIdentifier){ return UnquoteIdentifier(quotedIdentifier, null); } public string UnquoteIdentifier(string quotedIdentifier, OdbcConnection connection){ ADP.CheckArgumentNull(quotedIdentifier, "quotedIdentifier"); // if the user has specificed a prefix use the user specified prefix and suffix // otherwise get them from the provider string quotePrefix = QuotePrefix; string quoteSuffix = QuoteSuffix; if (ADP.IsEmpty(quotePrefix) == true) { if (connection == null) { throw ADP.QuotePrefixNotSet(ADP.UnquoteIdentifier); } quotePrefix = connection.QuoteChar(ADP.UnquoteIdentifier); quoteSuffix = quotePrefix; } String unquotedIdentifier; // by the ODBC spec "If the data source does not support quoted identifiers, a blank is returned." // So if a blank is returned the string is returned unchanged. Otherwise the returned string is used // to unquote the string if ((ADP.IsEmpty(quotePrefix) == false) || (quotePrefix != " ")) { // ignoring the return value because it is acceptable for the quotedString to not be quoted in this // context. ADP.RemoveStringQuotes(quotePrefix, quoteSuffix, quotedIdentifier, out unquotedIdentifier); } else { unquotedIdentifier = quotedIdentifier; } return unquotedIdentifier; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Data.Common; using System.Data.ProviderBase; using System.Diagnostics; using System.Runtime.InteropServices; using System.Threading; using System.Globalization; using System.Text; namespace System.Data.Odbc { #if WINFSInternalOnly internal #else public #endif sealed class OdbcCommandBuilder : DbCommandBuilder { public OdbcCommandBuilder() : base() { GC.SuppressFinalize(this); } public OdbcCommandBuilder(OdbcDataAdapter adapter) : this() { DataAdapter = adapter; } [ DefaultValue(null), ResCategoryAttribute(Res.DataCategory_Update), ResDescriptionAttribute(Res.OdbcCommandBuilder_DataAdapter), // MDAC 60524 ] new public OdbcDataAdapter DataAdapter { get { return (base.DataAdapter as OdbcDataAdapter); } set { base.DataAdapter = value; } } private void OdbcRowUpdatingHandler(object sender, OdbcRowUpdatingEventArgs ruevent) { RowUpdatingHandler(ruevent); } new public OdbcCommand GetInsertCommand() { return (OdbcCommand) base.GetInsertCommand(); } new public OdbcCommand GetInsertCommand(bool useColumnsForParameterNames) { return (OdbcCommand) base.GetInsertCommand(useColumnsForParameterNames); } new public OdbcCommand GetUpdateCommand() { return (OdbcCommand) base.GetUpdateCommand(); } new public OdbcCommand GetUpdateCommand(bool useColumnsForParameterNames) { return (OdbcCommand) base.GetUpdateCommand(useColumnsForParameterNames); } new public OdbcCommand GetDeleteCommand() { return (OdbcCommand) base.GetDeleteCommand(); } new public OdbcCommand GetDeleteCommand(bool useColumnsForParameterNames) { return (OdbcCommand) base.GetDeleteCommand(useColumnsForParameterNames); } override protected string GetParameterName(int parameterOrdinal) { return "p" + parameterOrdinal.ToString(System.Globalization.CultureInfo.InvariantCulture); } override protected string GetParameterName(string parameterName) { return parameterName; } override protected string GetParameterPlaceholder(int parameterOrdinal) { return "?"; } override protected void ApplyParameterInfo(DbParameter parameter, DataRow datarow, StatementType statementType, bool whereClause) { OdbcParameter p = (OdbcParameter) parameter; object valueType = datarow[SchemaTableColumn.ProviderType]; p.OdbcType = (OdbcType) valueType; object bvalue = datarow[SchemaTableColumn.NumericPrecision]; if (DBNull.Value != bvalue) { byte bval = (byte)(short)bvalue; p.PrecisionInternal = ((0xff != bval) ? bval : (byte)0); } bvalue = datarow[SchemaTableColumn.NumericScale]; if (DBNull.Value != bvalue) { byte bval = (byte)(short)bvalue; p.ScaleInternal = ((0xff != bval) ? bval : (byte)0); } } static public void DeriveParameters(OdbcCommand command) { // MDAC 65927 OdbcConnection.ExecutePermission.Demand(); if (null == command) { throw ADP.ArgumentNull("command"); } switch (command.CommandType) { case System.Data.CommandType.Text: throw ADP.DeriveParametersNotSupported(command); case System.Data.CommandType.StoredProcedure: break; case System.Data.CommandType.TableDirect: // CommandType.TableDirect - do nothing, parameters are not supported throw ADP.DeriveParametersNotSupported(command); default: throw ADP.InvalidCommandType(command.CommandType); } if (ADP.IsEmpty(command.CommandText)) { throw ADP.CommandTextRequired(ADP.DeriveParameters); } OdbcConnection connection = command.Connection; if (null == connection) { throw ADP.ConnectionRequired(ADP.DeriveParameters); } ConnectionState state = connection.State; if (ConnectionState.Open != state) { throw ADP.OpenConnectionRequired(ADP.DeriveParameters, state); } OdbcParameter[] list = DeriveParametersFromStoredProcedure(connection, command); OdbcParameterCollection parameters = command.Parameters; parameters.Clear(); int count = list.Length; if (0 < count) { for(int i = 0; i < list.Length; ++i) { parameters.Add(list[i]); } } } // DeriveParametersFromStoredProcedure ( // OdbcConnection connection, // OdbcCommand command); // // Uses SQLProcedureColumns to create an array of OdbcParameters // static private OdbcParameter[] DeriveParametersFromStoredProcedure(OdbcConnection connection, OdbcCommand command) { ListrParams = new List (); // following call ensures that the command has a statement handle allocated CMDWrapper cmdWrapper = command.GetStatementHandle(); OdbcStatementHandle hstmt = cmdWrapper.StatementHandle; int cColsAffected; // maps an enforced 4-part qualified string as follows // parts[0] = null - ignored but removal would be a run-time breaking change from V1.0 // parts[1] = CatalogName (optional, may be null) // parts[2] = SchemaName (optional, may be null) // parts[3] = ProcedureName // string quote = connection.QuoteChar(ADP.DeriveParameters); string[] parts = MultipartIdentifier.ParseMultipartIdentifier(command.CommandText, quote, quote, '.', 4, true, Res.ODBC_ODBCCommandText, false); if (null == parts[3]) { // match everett behavior, if the commandtext is nothing but whitespace set the command text to the whitespace parts[3] = command.CommandText; } // note: native odbc appears to ignore all but the procedure name ODBC32.RetCode retcode = hstmt.ProcedureColumns(parts[1], parts[2], parts[3], null); // Note: the driver does not return an error if the given stored procedure does not exist // therefore we cannot handle that case and just return not parameters. if (ODBC32.RetCode.SUCCESS != retcode) { connection.HandleError(hstmt, retcode); } using (OdbcDataReader reader = new OdbcDataReader(command, cmdWrapper, CommandBehavior.Default)) { reader.FirstResult(); cColsAffected = reader.FieldCount; // go through the returned rows and filter out relevant parameter data // while (reader.Read()) { // devnote: column types are specified in the ODBC Programmer's Reference // COLUMN_TYPE Smallint 16bit // COLUMN_SIZE Integer 32bit // DECIMAL_DIGITS Smallint 16bit // NUM_PREC_RADIX Smallint 16bit OdbcParameter parameter = new OdbcParameter(); parameter.ParameterName = reader.GetString(ODBC32.COLUMN_NAME-1); switch ((ODBC32.SQL_PARAM)reader.GetInt16(ODBC32.COLUMN_TYPE-1)){ case ODBC32.SQL_PARAM.INPUT: parameter.Direction = ParameterDirection.Input; break; case ODBC32.SQL_PARAM.OUTPUT: parameter.Direction = ParameterDirection.Output; break; case ODBC32.SQL_PARAM.INPUT_OUTPUT: parameter.Direction = ParameterDirection.InputOutput; break; case ODBC32.SQL_PARAM.RETURN_VALUE: parameter.Direction = ParameterDirection.ReturnValue; break; default: Debug.Assert(false, "Unexpected Parametertype while DeriveParamters"); break; } parameter.OdbcType = TypeMap.FromSqlType((ODBC32.SQL_TYPE)reader.GetInt16(ODBC32.DATA_TYPE-1))._odbcType; parameter.Size = (int)reader.GetInt32(ODBC32.COLUMN_SIZE-1); switch(parameter.OdbcType){ case OdbcType.Decimal: case OdbcType.Numeric: parameter.ScaleInternal = (Byte)reader.GetInt16(ODBC32.DECIMAL_DIGITS-1); parameter.PrecisionInternal = (Byte)reader.GetInt16(ODBC32.NUM_PREC_RADIX-1); break; } rParams.Add (parameter); } } retcode = hstmt.CloseCursor(); return rParams.ToArray();; } public override string QuoteIdentifier(string unquotedIdentifier){ return QuoteIdentifier(unquotedIdentifier,null); } public string QuoteIdentifier( string unquotedIdentifier, OdbcConnection connection){ ADP.CheckArgumentNull(unquotedIdentifier, "unquotedIdentifier"); // if the user has specificed a prefix use the user specified prefix and suffix // otherwise get them from the provider string quotePrefix = QuotePrefix; string quoteSuffix = QuoteSuffix; if (ADP.IsEmpty(quotePrefix) == true) { if (connection == null) { throw ADP.QuotePrefixNotSet(ADP.QuoteIdentifier); } quotePrefix = connection.QuoteChar(ADP.QuoteIdentifier); quoteSuffix = quotePrefix; } // by the ODBC spec "If the data source does not support quoted identifiers, a blank is returned." // So if a blank is returned the string is returned unchanged. Otherwise the returned string is used // to quote the string if ((ADP.IsEmpty(quotePrefix) == false) && (quotePrefix != " ")) { return ADP.BuildQuotedString(quotePrefix,quoteSuffix,unquotedIdentifier); } else { return unquotedIdentifier; } } override protected void SetRowUpdatingHandler(DbDataAdapter adapter) { Debug.Assert(adapter is OdbcDataAdapter, "!OdbcDataAdapter"); if (adapter == base.DataAdapter) { // removal case ((OdbcDataAdapter)adapter).RowUpdating -= OdbcRowUpdatingHandler; } else { // adding case ((OdbcDataAdapter)adapter).RowUpdating += OdbcRowUpdatingHandler; } } public override string UnquoteIdentifier( string quotedIdentifier){ return UnquoteIdentifier(quotedIdentifier, null); } public string UnquoteIdentifier(string quotedIdentifier, OdbcConnection connection){ ADP.CheckArgumentNull(quotedIdentifier, "quotedIdentifier"); // if the user has specificed a prefix use the user specified prefix and suffix // otherwise get them from the provider string quotePrefix = QuotePrefix; string quoteSuffix = QuoteSuffix; if (ADP.IsEmpty(quotePrefix) == true) { if (connection == null) { throw ADP.QuotePrefixNotSet(ADP.UnquoteIdentifier); } quotePrefix = connection.QuoteChar(ADP.UnquoteIdentifier); quoteSuffix = quotePrefix; } String unquotedIdentifier; // by the ODBC spec "If the data source does not support quoted identifiers, a blank is returned." // So if a blank is returned the string is returned unchanged. Otherwise the returned string is used // to unquote the string if ((ADP.IsEmpty(quotePrefix) == false) || (quotePrefix != " ")) { // ignoring the return value because it is acceptable for the quotedString to not be quoted in this // context. ADP.RemoveStringQuotes(quotePrefix, quoteSuffix, quotedIdentifier, out unquotedIdentifier); } else { unquotedIdentifier = quotedIdentifier; } return unquotedIdentifier; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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