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DownloadProgressChangedEventArgs Class

Provides data for the DownloadProgressChanged event of a WebClient.

System.Object
  System.EventArgs
    System.ComponentModel.ProgressChangedEventArgs
      System.Net.DownloadProgressChangedEventArgs

Namespace:  System.Net
Assembly:  System (in System.dll)

public class DownloadProgressChangedEventArgs : ProgressChangedEventArgs

The DownloadProgressChangedEventArgs type exposes the following members.

  NameDescription
Public propertyBytesReceivedGets the number of bytes received.
Public propertyProgressPercentageGets the asynchronous task progress percentage. (Inherited from ProgressChangedEventArgs.)
Public propertyTotalBytesToReceiveGets the total number of bytes in a WebClient data download operation.
Public propertyUserStateGets a unique user state. (Inherited from ProgressChangedEventArgs.)
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  NameDescription
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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Instances of this class are passed to the DownloadProgressChangedEventHandler.

The following code example demonstrates setting an event handler for the DownloadProgressChanged event.

    // Sample call : DownLoadFileInBackground2 ("http://www.contoso.com/logs/January.txt");
    public static void DownLoadFileInBackground2 (string address)
    {
        WebClient client = new WebClient ();
        Uri uri = new Uri(address);

        // Specify that the DownloadFileCallback method gets called 
        // when the download completes.
        client.DownloadFileCompleted += new AsyncCompletedEventHandler (DownloadFileCallback2);
        // Specify a progress notification handler.
        client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(DownloadProgressCallback);
        client.DownloadFileAsync (uri, "serverdata.txt");
    }

The following code example shows an implementation of a handler for this event.

private static void UploadProgressCallback(object sender, UploadProgressChangedEventArgs e)
{
    // Displays the operation identifier, and the transfer progress.
    Console.WriteLine("{0}    uploaded {1} of {2} bytes. {3} % complete...", 
        (string)e.UserState, 
        e.BytesSent, 
        e.TotalBytesToSend,
        e.ProgressPercentage);
}
private static void DownloadProgressCallback(object sender, DownloadProgressChangedEventArgs e)
{
    // Displays the operation identifier, and the transfer progress.
    Console.WriteLine("{0}    downloaded {1} of {2} bytes. {3} % complete...", 
        (string)e.UserState, 
        e.BytesReceived, 
        e.TotalBytesToReceive,
        e.ProgressPercentage);
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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