ASP.NET/VB.NET FileUpload控件 [英] ASP.NET/VB.NET FileUpload Control

问题描述

我有一个文件上传一个问题，当我从本地机器选择一个文件，它不会带来真正的路径的文件，它将使用路径为项目文件，并假定我选择的文件是存在的，任何想法？

例如：
文件名是Q.JPG，是在C：\\
当我浏览到C：\\，然后选择Q.JPG，并点击打开，我得到以下错误
找不到文件'C：\\ Program Files文件\\微软的Visual Studio 8 \\ Common7 \\ IDE \\ q.jpg。
所以，当我火了code的文件上传到FTP为例，由于文件不存在，它会返回一个错误

HTML端：

 ＆LT; ASP：文件上传ID =FU=服务器HEIGHT =24px的/＆GT;
 

下面是VB code：

 保护小组btnUpload_Click（BYVAL发件人为System.Object的，BYVAL E上System.EventArgs）把手btnUpload.C​​lick    如果FU.PostedFile IsNot运算没有AndAlso运算FU.PostedFile.FileName＆LT;＆GT;  然后
        昏暗MAXSIZE作为整数= FU.PostedFile.ContentLength
        如果MAXSIZE＆GT; 2097152接着
            lblUpload.Text =文件大小不能超过2 MB
            btnSave.Focus（）
            转到99
        万一
        --------------------------
        建立的请求......
        昏暗LOCFILE作为字符串= FU.PostedFile.FileName
        昏暗clsRequest作为System.Net.FtpWebRequest = DirectCast（System.Net.WebRequest.Create（ftp://myftp.com/＆放大器; LOCFILE），System.Net.FtpWebRequest）
        clsRequest.Credentials =新System.Net.NetworkCredential（用户名，密码）
        clsRequest.Method = System.Net.WebRequestMethods.Ftp.UploadFile        读文件...
        昏暗BFILE（）作为字节= System.IO.File.ReadAllBytes（FU.PostedFile.FileName）        ' 上传文件...
        昏暗clsStream作为的System.IO.Stream = clsRequest.GetRequestStream（）
        clsStream.Write（BFILE，0，bFile.Length）
        clsStream.Close（）
        clsStream.Dispose（）
        --------------------------
        lblUpload.Text =上传
        btnSave.Focus（）
    其他
        lblUpload.Text =选择要上传的文件
        btnSave.Focus（）
    万一
 

99：'你没事

 结束小组
 

解决方案

问题是你想在PostedFile读为本地文件（Web服务器上），而不是从连接到FileUploader的HttpPostedFile对象。

尝试：

 昏暗objFileStream作为的System.IO.Stream = FU.PostedFile.InputStream
昏暗BFILE（objFileStream.Length）为字节
objFileStream.Read（BFILE，0，objFileStream.Length）
 

I have a problem with FileUpload, when I select a file from the local machine, it will not bring the real path of the file, it will use the path for the project files and assume the file I am selecting is there, any ideas?

Example: File name is "Q.JPG" and is in "C:\" when I browse to "C:\" and select "Q.JPG" and click open, I get the following Error Could not find file 'C:\Program Files\Microsoft Visual Studio 8\Common7\IDE\q.jpg'. So when I fire up the code for Uploading the file to FTP for example, it will return an error because file doesn't exist

HTML side:

<asp:FileUpload ID="FU" runat="server" Height="24px" />

Below is the VB code:

Protected Sub btnUpload_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpload.Click

    If FU.PostedFile IsNot Nothing AndAlso FU.PostedFile.FileName <> "" Then
        Dim MaxSize As Integer = FU.PostedFile.ContentLength
        If MaxSize > "2097152" Then
            lblUpload.Text = "The file size cannot exceed 2 MB"
            btnSave.Focus()
            GoTo 99
        End If


        '--------------------------
        ' set up request...
        Dim LocFile As String = FU.PostedFile.FileName
        Dim clsRequest As System.Net.FtpWebRequest = DirectCast(System.Net.WebRequest.Create("ftp://myftp.com/" & LocFile), System.Net.FtpWebRequest)
        clsRequest.Credentials = New System.Net.NetworkCredential("username", "password")
        clsRequest.Method = System.Net.WebRequestMethods.Ftp.UploadFile

        ' read in file...
        Dim bFile() As Byte = System.IO.File.ReadAllBytes(FU.PostedFile.FileName)

        ' upload file...
        Dim clsStream As System.IO.Stream = clsRequest.GetRequestStream()
        clsStream.Write(bFile, 0, bFile.Length)
        clsStream.Close()
        clsStream.Dispose()
        '--------------------------


        lblUpload.Text = "Uploaded"
        btnSave.Focus()
    Else
        lblUpload.Text = "Choose a file to upload"
        btnSave.Focus()
    End If

99: 'Do Nothing

End Sub

解决方案

The problem is you're trying to read in the PostedFile as a local file (on the web server), not from the HttpPostedFile object attached to the FileUploader.

Try:

Dim objFileStream As System.IO.Stream = FU.PostedFile.InputStream
Dim bFile(objFileStream.Length) As Byte
objFileStream.Read(bFile, 0, objFileStream.Length)

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