71 lines
2.4 KiB
C#
71 lines
2.4 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="AsyncCompletedEventArgs.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.ComponentModel
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{
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using System.Diagnostics.CodeAnalysis;
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using System.Security.Permissions;
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using System.Reflection;
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[HostProtection(SharedState = true)]
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public class AsyncCompletedEventArgs : System.EventArgs
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{
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private readonly Exception error;
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private readonly bool cancelled;
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private readonly object userState;
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[Obsolete("This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.", true)]
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[EditorBrowsable(EditorBrowsableState.Never)]
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public AsyncCompletedEventArgs()
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{
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// This method was public in .NET CF, but didn't do anything. The fact that it was public was to
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// work around a tooling issue on their side.
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}
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public AsyncCompletedEventArgs(Exception error, bool cancelled, object userState)
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{
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this.error = error;
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this.cancelled = cancelled;
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this.userState = userState;
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}
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[ SRDescription(SR.Async_AsyncEventArgs_Cancelled) ]
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public bool Cancelled
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{
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get { return cancelled; }
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}
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[ SRDescription(SR.Async_AsyncEventArgs_Error) ]
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public Exception Error
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{
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get { return error; }
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}
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[ SRDescription(SR.Async_AsyncEventArgs_UserState) ]
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public object UserState
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{
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get { return userState; }
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}
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// Call from every result 'getter'. Will throw if there's an error or operation was cancelled
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//
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[SuppressMessage("Microsoft.Design", "CA1030:UseEventsWhereAppropriate")]
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protected void RaiseExceptionIfNecessary()
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{
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if (Error != null)
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{
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throw new TargetInvocationException(SR.GetString(SR.Async_ExceptionOccurred), Error);
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}
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else if (Cancelled)
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{
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throw new InvalidOperationException(SR.GetString(SR.Async_OperationCancelled));
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}
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}
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}
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}
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