MultipartFormDataStreamProvider Class

Article
12/19/2012

An IMultipartStreamProvider suited for use with HTML file uploads for writing file content to a FileStream. The stream provider looks at the Content-Disposition header field and determines an output Stream based on the presence of a filename parameter. If a filename parameter is present in the Content-Disposition header field then the body part is written to a FileStream, otherwise it is written to a MemoryStream. This makes it convenient to process MIME Multipart HTML Form data which is a combination of form data and file content.

Inheritance Hierarchy

System.Object
  System.Net.Http.MultipartStreamProvider
    System.Net.Http.MultipartFileStreamProvider
      System.Net.Http.MultipartFormDataStreamProvider

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

Syntax

'Declaration
Public Class MultipartFormDataStreamProvider _
    Inherits MultipartFileStreamProvider
'Usage
Dim instance As MultipartFormDataStreamProvider

public class MultipartFormDataStreamProvider : MultipartFileStreamProvider

public ref class MultipartFormDataStreamProvider : public MultipartFileStreamProvider

type MultipartFormDataStreamProvider =  
    class
        inherit MultipartFileStreamProvider
    end

public class MultipartFormDataStreamProvider extends MultipartFileStreamProvider

The MultipartFormDataStreamProvider type exposes the following members.

Constructors

	Name	Description
	MultipartFormDataStreamProvider(String)	Initializes a new instance of the MultipartFormDataStreamProvider class.
	MultipartFormDataStreamProvider(String, Int32)	Initializes a new instance of the MultipartFormDataStreamProvider class.

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Properties

	Name	Description
	BufferSize	Gets or sets the number of bytes buffered for writes to the file. (Inherited from MultipartFileStreamProvider.)
	Contents	Gets or sets the contents for this MultipartStreamProvider. (Inherited from MultipartStreamProvider.)
	FileData	Gets or sets the multipart file data. (Inherited from MultipartFileStreamProvider.)
	FormData	Gets a NameValueCollection of form data passed as part of the multipart form data.
	RootPath	Gets or sets the root path where the content of MIME multipart body parts are written to. (Inherited from MultipartFileStreamProvider.)

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Methods

	Name	Description
	Equals	(Inherited from Object.)
	ExecutePostProcessingAsync	Reads the non-file contents as form data (Overrides MultipartStreamProvider.ExecutePostProcessingAsync().)
	Finalize	(Inherited from Object.)
	GetHashCode	(Inherited from Object.)
	GetLocalFileName	Gets the name of the local file which will be combined with the root path to create an absolute file name where the contents of the current MIME body part will be stored. (Inherited from MultipartFileStreamProvider.)
	GetStream	(Overrides MultipartFileStreamProvider.GetStream(HttpContent, HttpContentHeaders).)
	GetType	(Inherited from Object.)
	MemberwiseClone	(Inherited from Object.)
	ToString	(Inherited from Object.)

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Thread Safety

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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