Everyday Learning

Generate new token on each request in MVC Ajax post call (Custom Code) Step: 1 In controller add below Code to generate new random token and store it in the session protected string GenerateCSRFToken() {   RandomNumberGenerator rng = new RNGCryptoServiceProvider ( "Add Your Salt String" );   var tokenData = new byte [64];  rng.GetBytes(tokenData);   var token = Convert .ToBase64String(tokenData);  Session[ "CSRFtoken" ] = token.Trim();  return token; } Step: 2 In controller generate new token and pass it to view using ViewData. public ActionResult Index() {  ViewData[ "CSRFtoken" ] = GenerateCSRFToken();  return View(); } Step: 3 In View create hidden field and assign ViewData value to it. < input type ="hidden" value =" @ ViewData[ "CSRFtoken" ] " id ="hdnCSRFtoken" /> Step: 4 In View read and pass the hidden field value as method parameter/

Password Protected File Validation for(.doc/.docx/.xls/.xlsx/.pdf) file types protected void btnUpload_Click( object sender, EventArgs e)         {             //Check if File Upload control has file or not             if (FileUpload1.HasFile)             {                 //Get Uploaded file bytes                 var bytes = FileUpload1.FileBytes;                 //Get Uploaded File Extension                 FileInfo objFileInfo = new FileInfo (FileUpload1.FileName);                 string StrFileExt = objFileInfo.Extension.ToUpper();                                 //Based on the File extension call appropriate user defined method.                 //For PDF file type                 if (StrFileExt == ".PDF" )                 {                     //Upload and save file in server temp folder                     var newfilename = DateTime .Now.GetHashCode() + FileUpload1.FileName;                     FileUpload1.SaveAs(Syst