Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / Odbc / OdbcEnvironmentHandle.cs / 1305376 / OdbcEnvironmentHandle.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Data.Common; using System.Diagnostics; using System.Globalization; using System.Runtime.InteropServices; using System.Security; using System.Security.Permissions; using System.Text; using System.Threading; using System.Runtime.Versioning; namespace System.Data.Odbc { sealed internal class OdbcEnvironmentHandle : OdbcHandle { // SxS: this method uses SQLSetEnvAttr to setup ODBC environment handle settings. Environment handle is safe in SxS. [ResourceExposure(ResourceScope.None)] [ResourceConsumption(ResourceScope.Process, ResourceScope.Process)] internal OdbcEnvironmentHandle() : base(ODBC32.SQL_HANDLE.ENV, null) { ODBC32.RetCode retcode; //Set the expected driver manager version // retcode = UnsafeNativeMethods.SQLSetEnvAttr( this, ODBC32.SQL_ATTR.ODBC_VERSION, ODBC32.SQL_OV_ODBC3, ODBC32.SQL_IS.INTEGER); // ignore retcode //Turn on connection pooling //Note: the env handle controls pooling. Only those connections created under that //handle are pooled. So we have to keep it alive and not create a new environment //for every connection. // retcode = UnsafeNativeMethods.SQLSetEnvAttr( this, ODBC32.SQL_ATTR.CONNECTION_POOLING, ODBC32.SQL_CP_ONE_PER_HENV, ODBC32.SQL_IS.INTEGER); switch(retcode) { case ODBC32.RetCode.SUCCESS: case ODBC32.RetCode.SUCCESS_WITH_INFO: break; default: Dispose(); throw ODBC.CantEnableConnectionpooling(retcode); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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