如何在Asp.Net中使用Response.WriteFile方法下载文件后进行回发 [英] How to do postback after downloading File using Response.WriteFile method in Asp.Net

问题描述

我正在使用Response.WriteFile方法将Excel工作表从所需位置下载到客户端机器。下面是代码： -

I am using Response.WriteFile method for downloading an excel sheet from a desired location to client machine.Below is the code:-

// Checking if file exists
                if (myfile.Exists)
                {
                    // Clear the content of the response  
                    HttpContext.Current.Response.ClearContent();

                    // Add the file name and attachment, which will force the open/cancel/save dialog box to show, to the header
                    HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + myfile.Name);

                    // Add the file size into the response header
                    HttpContext.Current.Response.AddHeader("Content-Length", myfile.Length.ToString());

                    // Set the ContentType
                    HttpContext.Current.Response.ContentType = ReturnExtension(myfile.Extension.ToLower());

                    // Write the file into the response (TransmitFile is for ASP.NET 2.0. In ASP.NET 1.1 you have to use WriteFile instead)
                    HttpContext.Current.Response.WriteFile(myfile.FullName);

                    // End the response
                    HttpContext.Current.Response.End();
                }
private string ReturnExtension(string fileExtension)
        {
            switch (fileExtension)
            {
                case ".xlsx":
                    return "application/excel";
                default:
                    return "application/octet-stream";
            }
        }

我想要一旦下载弹出窗口出现并要求保存/打开/取消并且最终用户选择他的选项然后在完成该任务之后，回调发生在调用它的网页上。假设用户单击保存然后保存文件，并且在保存帖子后将会发生。如果用户选择打开，则会打开该文件，然后在调用此下载功能的网页上发回帖子。

I want that once the download pop up will appear and asking for Save/Open/Cancel and the end user select his option then after completion of that task a post back happen to the webpage from where it is been invoked. Suppose if user click save then the file get saved and after saving a post back will happen.Same if user select open then the file will be opened and then a post back happen to the webpage from where this Download function is invoked.

推荐答案

这是非常容易的人你可以添加带有visible =false属性的按钮和

OnClick =button1_Click属性

it is very easy man you can add button with visible = "false" property and with
OnClick="button1_Click" property

button1_Click((object sender, System.EventArgs e)
{
   //and leave it empty;
}

在你完成代码结束后调用此按钮事件

如下：

the after you finish your code at the end call this button event
as follows:

button1_Click(null,null);

ex：正如你所说的，如果用户选择open，那么文件将被打开，然后发回一个帖子就可以了这个代码的结尾（和打开的文件）调用空函数...简单



关于

ex: as you say if user select open then the file will be opened and then a post back happen ok at the end of this code (and the file opened)call the empty function...easy

regard

我有一个同样的问题PLZ帮助我

解决方案1不起作用

i have a same problem plz help me
solution1 does''t work

< pre lang =c＃ >< pre lang =text>< pre lang =text>< / pre>< / pre>< / pre> All You可以。在导出Excel之前，您应该使用JavaScript方法。调用服务器端事件。或者，如果你可以在JavaScript中处理它会更好..

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