HttpPostedFile.InputStream-Eigenschaft

Ruft ein Stream-Objekt ab, das auf eine geuploadete Datei zeigt, um das Lesen des Dateiinhalts vorzubereiten.

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

Syntax

'Declaration
Public ReadOnly Property InputStream As Stream
'Usage
Dim instance As HttpPostedFile
Dim value As Stream

value = instance.InputStream

public Stream InputStream { get; }

public:
property Stream^ InputStream {
    Stream^ get ();
}

/** @property */
public Stream get_InputStream ()

public function get InputStream () : Stream

Eigenschaftenwert

Ein Stream, der auf eine Datei zeigt.

Beispiel

Im folgenden Beispiel wird veranschaulicht, wie der Inhalt der ersten Datei in der Dateiauflistung des Clients in ein Bytearray eingelesen und dieses anschließend in eine Zeichenfolge kopiert wird.

Imports System
Imports System.Web
Imports System.Web.UI

Public Class Page1: Inherits Page

 Protected Loop1 As Integer
 Protected MyString As String

  Protected Sub Page_Load(sender As Object, e As EventArgs)

    Dim MyFileCollection As HttpFileCollection
    Dim MyFile As HttpPostedFile
    Dim FileLen As Integer
    Dim MyString As String
    Dim MyStream As System.IO.Stream
 
    MyFileCollection = Request.Files
    MyFile = MyFileCollection(0)
 
    FileLen = MyFile.ContentLength
    Dim Input(FileLen) As Byte
 
    ' Initialize the stream.
    MyStream = MyFile.InputStream
 
    ' Read the file into the byte array.
    MyStream.Read(input, 0, FileLen)
 
    ' Copy the byte array into a string.
    For Loop1 = 0 To FileLen-1
      MyString = MyString & Input(Loop1).ToString()
    Next Loop1
    
 End Sub

End Class

using System;
using System.Web;
using System.Web.UI;

public class Page1: Page
{
 protected string MyString;
 private void Page_Load(Object sender, EventArgs e)
 {
   HttpFileCollection MyFileCollection;
   HttpPostedFile MyFile;
   int FileLen;
   System.IO.Stream MyStream;
 
   MyFileCollection = Request.Files;
   MyFile = MyFileCollection[0];
 
   FileLen = MyFile.ContentLength;
   byte[] input = new byte[FileLen];
 
   // Initialize the stream.
   MyStream = MyFile.InputStream;
 
   // Read the file into the byte array.
   MyStream.Read(input, 0, FileLen);
 
   // Copy the byte array into a string.
   for (int Loop1 = 0; Loop1 < FileLen; Loop1++)
     MyString = MyString + input[Loop1].ToString();
    
 }
}

import System.*;
import System.Web.*;
import System.Web.UI.*;

public class Page1 extends Page
{
    protected String myString;
    private void Page_Load(Object sender, EventArgs e)
    {
        HttpFileCollection myFileCollection;
        HttpPostedFile myFile;
        int fileLen;
        System.IO.Stream myStream;

        myFileCollection = get_Request().get_Files();
        myFile = myFileCollection.get_Item(0);

        fileLen = myFile.get_ContentLength();
        ubyte input[] = new ubyte[fileLen];

        // Initialize the stream.
        myStream = myFile.get_InputStream();

        // Read the file into the byte array.
        myStream.Read(input, 0, fileLen);

        // Copy the byte array into a string.
        for (int loop1 = 0; loop1 < fileLen; loop1++) {
            myString = myString + input.get_Item(loop1).ToString();
        }
    } //Page_Load
} //Page1

import System
import System.Web
import System.Web.UI

class Page1 extends Page{

 var myString : String

  function Page_Load(sender : Object, e : EventArgs){
    var myFileCollection : HttpFileCollection
    var myFile : HttpPostedFile
    var fileLen : int
    var myString : String = ""
    var myStream : System.IO.Stream

    myFileCollection = Request.Files
    myFile = myFileCollection[0]

    fileLen = myFile.ContentLength
    var input : Byte[] = new Byte[fileLen]

    // Initialize the Stream.
    myStream = myFile.InputStream

    // Read the file into the byte array.
    myStream.Read(input, 0, fileLen)

    // Copy the Byte array into a string.
    for(var i=0; i < fileLen; i++){
      myString = myString + input[i].ToString()
    }

   }
}

Plattformen

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

HttpPostedFile-Klasse
HttpPostedFile-Member
System.Web-Namespace