download document through C#

Question

how to download file from server mapath through C#

i am using

   public static void DownloadFile(HttpResponse response, string fileRelativePath)
    {

        try
        {
            string contentType = "";
            //Get the physical path to the file.
            string FilePath = HttpContext.Current.Server.MapPath(fileRelativePath);

            string fileExt = Path.GetExtension(fileRelativePath).Split('.')[1].ToLower();

            if (fileExt == "pdf")
            {
                //Set the appropriate ContentType.
                contentType = "Application/pdf";
            }

            //Set the appropriate ContentType.

            response.ContentType = contentType;
            response.AppendHeader("content-disposition", "attachment; filename=" + (new FileInfo(fileRelativePath)).Name);

            //Write the file directly to the HTTP content output stream.
            response.WriteFile(FilePath);
            response.End();
        }
        catch
        {
            //To Do
        }
    }

how to call this method...

can anyone help me..

Madan Shekar · Answer

Used Namespace: using System; using System.Web; Step 1 : This is used to get Project Location to download File inside the Current Project. /// /// This is used to get the current Project Location. /// public static string ServerMapPath(string path) { return HttpContext.Current.Server.MapPath(path); } Step 2: Next Step, we have to get the current response. /// /// This is used to get Current Response. /// public static HttpResponse GetHttpResponse() { return HttpContext.Current.Response; } Step 3: This method Helps to download any type of File within the server by passing filename in parameter. /// /// This is used to download file from server. /// /// public static void DownLoadFileFromServer(string fileName) { //This is used to get Project Location. string filePath = ServerMapPath(fileName); //This is used to get the current response. HttpResponse res = GetHttpResponse(); res.Clear(); res.AppendHeader("content-disposition", "attachment; filename=" + filePath); res.ContentType = "application/octet-stream"; res.WriteFile(filePath); res.Flush(); res.End(); } Step 4: Creating Event for Button to download File from server by providing filename in the textbox. protected void Button1_Click(object sender, EventArgs e) { //string fileName = "DownloadTextFile.txt"; string fileName = FileNameTxt.Text; //This method helps to download File from Server. DownLoadFileFromServer(fileName); } Thus I have explained how to Download File form server by specifying filename. if it helps mark as answer..

Madan Shekar · Answer

use this line response .Redirect(url,false);

Mahendren Myya · Answer

Hello Madan Sorap, Thank you for your codes. But this codes not working, i got exception "Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack"