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//------------------------------------------------------------------------------
// <copyright file="DbDataSourceEnumerator.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
// <owner current="true" primary="false">Microsoft</owner>
//------------------------------------------------------------------------------
namespace System.Data.Common {
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Threading;
public 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) {
}
}
*/
}
}
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