DbDataSourceEnumerator.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / System / Data / Common / DbDataSourceEnumerator.cs / 1 / DbDataSourceEnumerator.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
//----------------------------------------------------------------------------- 
 
namespace System.Data.Common {
 
    using System;
    using System.Collections;
    using System.ComponentModel;
    using System.Data; 
    using System.Diagnostics;
    using System.Threading; 
 
#if WINFSInternalOnly
    internal 
#else
    public
#endif
    abstract class DbDataSourceEnumerator { // V1.2.3300 

        protected DbDataSourceEnumerator() { // V1.2.3300 
        } 

 
        abstract public DataTable GetDataSources(); // V1.2.3300

        /*
        virtual public IAsyncResult BeginGetDataSources(AsyncCallback callback, object asyncStateObject) { // V1.2.3300 
            DbEnumSynchronousAsyncResult asyncResult = new DbEnumSynchronousAsyncResult(callback, asyncStateObject);
            try { 
                asyncResult._dataTable = GetElements(); 
                asyncResult.SetCompletedSynchronously();
            } 
            catch(DataAdapterException e) {
                ADP.TraceExceptionForCapture(e);
                asyncResult.ExceptionObject = e;
            } 
            if (null == asyncResult._dataTable) {
                throw ADP.DataAdapter("no datatable"); 
            } 
            if (null != callback) {
                callback(asyncResult); 
            }
            return asyncResult;
        }
 
        virtual public DataTable EndGetDataSources(IAsyncResult asyncResult) { // V1.2.3300
            ADP.CheckArgumentNull(asyncResult, "asyncResult"); 
            DbEnumSynchronousAsyncResult ar = (asyncResult as DbEnumSynchronousAsyncResult); 
            if (ar._endXxxCalled) {
                throw ADP.InvalidOperation("EndGetElements called twice"); 
            }
            ar._endXxxCalled = true;

            if (null != ar.ExceptionObject) { 
                throw ar.ExceptionObject;
            } 
            return ar._dataTable; 
        }
 
        sealed private class DbEnumSynchronousAsyncResult : DbAsyncResult {
            internal bool      _endXxxCalled;
            internal DataTable _dataTable;
 
            internal DbEnumSynchronousAsyncResult(AsyncCallback callback, Object asyncStateObject) : base(null, callback, asyncStateObject) {
            } 
        } 
        */
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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