已下载的文件已破坏其格式 [英] Downloaded file has broken its format

问题描述

我为我的网络应用程序编写了一个代码，我正在上传一些文件（Pdf和png等）并在gridview中显示这些文件。我希望在点击行时从gridview下载上传的文件。我已成功完成该任务，但是当我打开下载的文件时，我面临文件无法打开的错误。我怎么摆脱它。



这是我用来从gridview下载文件的代码。



我尝试过：



protected void GridView1_RowCommand（object sender，GridViewCommandEventArgs e）

{

if（e.CommandName ==Download）{



Response.Clear（）;

Response.ContentType =application / octect-stream;

Response.AppendHeader（content-disposition，filename =+ e.CommandArgument）;



Response.End（）;

}

}

I have written a code for my web application, i which i am uploading some files (Pdf and png etc) and displaying the files in the gridview. I am desirous to download the uploaded file from gridview on clicking the row. I have successfully done that task, but when i open the downloaded file, i face the error that "File is unable to open". How i can get rid from that.

Here is my code which i am using to download the file from the gridview.

What I have tried:

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Download") {

Response.Clear();
Response.ContentType = "application/octect-stream";
Response.AppendHeader("content-disposition","filename="+ e.CommandArgument);

Response.End();
}
}

推荐答案

你需要做类似下面的代码

you need to do like below code

string filename = Path.GetFileName(FileUpload1.PostedFile.FileName);
    string contentType = FileUpload1.PostedFile.ContentType;
Stream fs = FileUpload1.PostedFile.InputStream;
BinaryReader br = new BinaryReader(fs);
byte[] bytes = br.ReadBytes((Int32)fs.Length);

Response.Clear();
    Response.Buffer = true;
    Response.Charset = "";
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    Response.ContentType = contentType;
    Response.AppendHeader("Content-Disposition", "attachment; filename=" + fileName);
    Response.BinaryWrite(bytes);
    Response.Flush();
    Response.End();

代码未经测试需要检查

code is not tested you need to check

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