如何在上传之前显示上传的文件名？ [英] how to display uploaded files name before uploading it?

问题描述

我想显示文件名（逐个）..我已经给出了我的代码，但它会抛出错误



i used .net framework 4.0

I want to show the file names(one by one).. I have given my codes but it throws error

i used .net framework 4.0

protected void btnUpload_Click2(object sender, EventArgs e)
    {
        for (int i = 0; i < Request.Files.Count; i++)
        {
            HttpPostedFile PostedFile = Request.Files[i];
            if (PostedFile.ContentLength > 0)
            {
                if (FileUpload1.HasFile)
                {
                    foreach (var file in FileUpload1.PostedFile)
                    {
                        //upload logic
                        Response.Write(file.FileName + " - " + file.ContentLength + " Bytes. <br />");


                        string FileName = System.IO.Path.GetExtension(PostedFile.FileName);
                        PostedFile.SaveAs(Server.MapPath("~/files") + PostedFile.FileName);
                    }

                }

            }
        }

    }

推荐答案

您好，

您的代码应该修改如下：



在aspx文件中你放置此代码：

Hello,
Your code should be modified as bellow:

In aspx file you place this code:

<form id="form1" runat="server">
    <div>
        <input type="file" multiple="true" runat="server" id="FileUpload2" />
        <asp:Button runat="server" ID="btnUpload" Text="Upload" OnClick="btnUpload_Click"/>
    </div>
    </form>

在代码后面放置此代码：

And in code behind place this code:

protected void btnUpload_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < Request.Files.Count; i++)
            {
                HttpPostedFile postedFile = Request.Files[i];
                if (postedFile.ContentLength > 0)
                {
                    //upload logic
                    var fileName = System.IO.Path.GetFileName(postedFile.FileName);
                    Response.Write(fileName + " - " + postedFile.ContentLength + " Bytes. <br />");
                    var savefilePath = Server.MapPath("~/files/") + fileName;
                    postedFile.SaveAs(savefilePath);
                }
            }
        }

快乐编码！。

Happy coding!.

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