FileUpload上傳控制元件用法詳解--來自MSDN幫助文件

阿新 • • 發佈：2019-01-12

Visual Basic	複製程式碼
<%@ Page Language="VB" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" > <script runat="server" > Sub UploadButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) ' Save the uploaded file to an "Uploads" directory ' that already exists in the file system of the ' currently executing ASP.NET application. ' Creating an "Uploads" directory isolates uploaded ' files in a separate directory. This helps prevent ' users from overwriting existing application files by ' uploading files with names like "Web.config". Dim saveDir As String = "/Uploads/" ' Get the physical file system path for the currently ' executing application. Dim appPath As String = Request.PhysicalApplicationPath ' Before attempting to save the file, verify ' that the FileUpload control contains a file. If (FileUpload1.HasFile) Then Dim savePath As String = appPath + saveDir + _ Server.HtmlEncode(FileUpload1.FileName) ' Call the SaveAs method to save the ' uploaded file to the specified path. ' This example does not perform all ' the necessary error checking. ' If a file with the same name ' already exists in the specified path, ' the uploaded file overwrites it. FileUpload1.SaveAs(savePath) ' Notify the user that the file was uploaded successfully. UploadStatusLabel.Text = "Your file was uploaded successfully." Else ' Notify the user that a file was not uploaded. UploadStatusLabel.Text = "You did not specify a file to upload." End If End Sub </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server" > <title>FileUpload Class Example</title> </head> <body> <h3>FileUpload Class Example: Save To Application Directory</h3> <form id="form1" runat="server" > <div> <h4>Select a file to upload:</h4> <asp:FileUpload id="FileUpload1" runat="server" > </asp:FileUpload> <br/><br/> <asp:Button id="UploadButton" Text="Upload file" OnClick="UploadButton_Click" runat="server" > </asp:Button> <hr /> <asp:Label id="UploadStatusLabel" runat="server" > </asp:Label> </div> </form> </body> </html>

Visual Basic

複製程式碼

<%@ Page Language="VB"
 %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
>

<script runat="server"
>
    Sub
 UploadButton_Click(ByVal
 sender As
 Object, ByVal
 e As
 System.EventArgs)

        ' Save the uploaded file to an "Uploads" directory 


        ' that already exists in the file system of the 

        ' currently executing ASP.NET application.  

        ' Creating an "Uploads" directory isolates uploaded 

        ' files in a separate directory. This helps prevent

        ' users from overwriting existing application files by

        ' uploading files with names like "Web.config". 


        Dim
 saveDir As
 String = "/Uploads/"


        ' Get the physical file system path for the currently

        ' executing application.

        Dim
 appPath As
 String = Request.PhysicalApplicationPath

        ' Before attempting to save the file, verify

        ' that the FileUpload control contains a file. 


        If (FileUpload1.HasFile) Then

            Dim
 savePath As
 String = appPath + saveDir + _
                Server.HtmlEncode(FileUpload1.FileName)

            ' Call the SaveAs method to save the 

            ' uploaded file to the specified path.

            ' This example does not perform all

            ' the necessary error checking.               

            ' If a file with the same name

            ' already exists in the specified path,  

            ' the uploaded file overwrites it.

            FileUpload1.SaveAs(savePath)

            ' Notify the user that the file was uploaded successfully.

            UploadStatusLabel.Text = "Your file was uploaded successfully."


        Else

            ' Notify the user that a file was not uploaded.

            UploadStatusLabel.Text = "You did not specify a file to upload."

        End
 If

    End
 Sub


</script>

<html xmlns="http://www.w3.org/1999/xhtml"
 >
<head runat="server"
>
    <title>FileUpload Class
 Example</title>
</head>
<body>
   <h3>FileUpload Class
 Example: Save To
 Application Directory</h3>
   <form id="form1" runat="server"
>
   <div>   
       <h4>Select
 a file to upload:</h4>

       <asp:FileUpload id="FileUpload1"
                 
           runat="server"
>
       </asp:FileUpload>

       <br/><br/>

       <asp:Button id="UploadButton"
 
           Text="Upload file"

           OnClick="UploadButton_Click"

           runat="server"
>
       </asp:Button>    

       <hr />

       <asp:Label id="UploadStatusLabel"

           runat="server"
>
       </asp:Label>       

   </div>
   </form>
</body>
</html>

FileUpload上傳控制元件用法詳解--來自MSDN幫助文件

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FileUpload上傳控制元件用法詳解--來自MSDN幫助文件

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