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.NET Development
.NET Framework 3.5
HttpResponse Class
 TransmitFile Method (String)
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This page is specific to
Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:
.NET Framework Class Library
HttpResponse..::.TransmitFile Method (String)

Writes the specified file directly to an HTTP response output stream, without buffering it in memory.

Namespace:  System.Web
Assembly:  System.Web (in System.Web.dll)
Visual Basic (Declaration)
Public Sub TransmitFile ( _
    filename As String _
)
Visual Basic (Usage)
Dim instance As HttpResponse
Dim filename As String

instance.TransmitFile(filename)
C#
public void TransmitFile(
    string filename
)
Visual C++
public:
void TransmitFile(
    String^ filename
)
JScript
public function TransmitFile(
    filename : String
)

Parameters

filename
Type: System..::.String
The name of the file to write to the HTTP output.
ExceptionCondition
ArgumentNullException

The filename parameter is nullNothingnullptra null reference (Nothing in Visual Basic)

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0
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This method does not work with UNC-share file paths.      A_HREF   |   Edit   |   Show History

This method does not work with UNC-share file paths, so you have to check it before using this method, for example:

if (filePath.StartsWith(@"\\"))
context.Response.WriteFile(filePath, false);
else
context.Response.TransmitFile(filePath);
Processing
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