How to clear text box records before or after downloading a file in ASP.NET web application

Question

     using (FileStream fs = File.Create(dataDir + xmlFileToConvertTo))
                            {
                                Byte[] info = new UTF8Encoding(true).GetBytes(xmlData);
                                fs.Write(info, 0, info.Length);
                            }
							    string message = $"{xmlFileToConvertTo} has been stored in {dataDir1}";
                                ScriptManager.RegisterClientScriptBlock(Page, typeof(Page), "ClientScript", "alert('"+message+"')", true);
                                txtPartNo.Text = string.Empty;
							    DdStrand.Text = string.Empty;
							    string _path = @"\server
ecipe\" + xmlFileToConvertTo;
							    System.IO.FileInfo _file = new System.IO.FileInfo(_path);
							if (_file.Exists)
							{
								    Response.Clear();
								    Response.AddHeader("Content-Disposition", "attachment; filename=" + _file.Name);
								    Response.AddHeader("Content-Length", _file.Length.ToString());
								    Response.ContentType = "application/octet-stream";
								    Response.WriteFile(_file.FullName);
								    Response.End();
                                    txtPartNo.Text = null;
                                    DdStrand.Text = null;

							}

Accepted Answer

Hi @Roefatin, Ridzuan,

Well, what I think you need to understand is this: when you do a download operation, the respond to browser is file, not the page. So if you want to implement such a requirement, you can try to use javascript, something like this:

And the button click event:


        protected void btnDownload_Click(object sender, EventArgs e)
        {
            if (_File.HasFile)
            {
                txtPartNo.Text = null;
                Response.Clear();
                Response.AddHeader("Content-Disposition", "attachment; filename=" + _File.FileName);
                Response.AddHeader("Content-Length", _File.FileContent.Length.ToString());
                Response.ContentType = "application/octet-stream";
                Response.WriteFile("background.jpg");
                Response.End();
                //txtPartNo.Text = null;
            }
        }

Result: enter image description here

Best regards,

Xudong Peng

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How to clear text box records before or after downloading a file in ASP.NET web application

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