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HttpPostedFileBase Class
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HttpPostedFileBase Class

Serves as the base class for classes that provide access to individual files that have been uploaded by a client.

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

public abstract class HttpPostedFileBase

The HttpPostedFileBase type exposes the following members.

Protected methodHttpPostedFileBaseInitializes the class for use by an inherited class instance. This constructor can only be called by an inherited class.

Public propertyContentLengthWhen overridden in a derived class, gets the size of an uploaded file, in bytes.
Public propertyContentTypeWhen overridden in a derived class, gets the MIME content type of an uploaded file.
Public propertyFileNameWhen overridden in a derived class, gets the fully qualified name of the file on the client.
Public propertyInputStreamWhen overridden in a derived class, gets a Stream object that points to an uploaded file to prepare for reading the contents of the file.

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 methodSaveAsWhen overridden in a derived class, saves the contents of an uploaded file.
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)

The HttpPostedFileBase class is an abstract class that contains the same members as the HttpPostedFile class. The HttpPostedFileBase class lets you create derived classes that are like the HttpPostedFile class, but that you can customize and that work outside the ASP.NET pipeline. When you perform unit testing, you typically use a derived class to implement members that have customized behavior that fulfills the scenario you are testing.

The HttpPostedFileWrapper class derives from the HttpPostedFileBase class. The HttpPostedFileWrapper class serves as a wrapper for the HttpPostedFile class. At run time, you typically use an instance of the HttpPostedFileWrapper class to call members of the HttpPostedFile object.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5 SP1

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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