上传文件时出现问题 [英] Problem in uploading a file

问题描述

使用此代码我正在上传文件并在gridview上显示。但是当我点击上传按钮时没有任何事情发生，没有错误来....



我选择文件时通过调试检查HttpFileCollection的对象没有任何内容意味着hfc给出null。



请帮帮我

Using this code I''m uploading the file and showing on gridview. But when I click the upload button nothing happen and no error come....

I have checked by debugging when I select the file nothing comes to the object of HttpFileCollection means hfc gives null.

Please help me

protected void btnUpload_Click(object sender, EventArgs e)
{
    HttpFileCollection hfc = Request.Files; // htc gives null
    foreach (string filetagname in hfc)
    {
        HttpPostedFile hpf = Request.Files[filetagname];
        if (hpf.ContentLength > 0)
        {
            int size = hpf.ContentLength;
            string name = hpf.FileName;
            int position = name.LastIndexOf(@"\\");
            name = name.Substring(position + 1);
            string content = hpf.ContentType;
            byte[] filedata = new byte[size];
            hpf.InputStream.Read(filedata, 0, size);
            filedownload.savefile(name, content, size, filedata);

        }
    }

    DataTable dt = filedownload.GetFileList();
    GridView1.DataSource = dt;
    GridView1.DataBind();
}

推荐答案

嘿见 HttpRequest.Files Property [ ^ ]

它显示了使用此功能的一个很好的例子，希望这有帮助。

Hey see HttpRequest.Files Property[^]
It shows a good example of using this functionality, Hope this helps.

按照答案上传多个文件aspx.net C＃ [ ^ ]。

Follow the answer Upload more than one file aspx.net C#[^].

引用：

据我所见，您只需要在表单中添加enctype =multipart / form-data： br />


您没有使用asp：FileUpload控件自动添加该类型，因此您应该手动执行此操作。

As far as I can see, you just need to add enctype="multipart/form-data" to your form:

You are not using asp:FileUpload control which adds that enctype automatically, so you should do that manually.

谢谢......

Thanks...

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