A potentially dangerous Request.Form value was detected from the client (ctl00$cphMain$txCourseDescription="-ace="'MS Sans Serif&#-")

My screen has a Telrik rad popup which populate on a button click(btnCourseDescription). I have taken a label to show html formated data and a textbox to work with code behind file. when I click on btnCourseDescription; Telrik's popup opens and and after submit it shows data on label and assign value to textbox using Javascript ... Here is my Javascript code...

<script type="text/javascript"> function clientShow(sender, eventArgs) { //$find(); var txtInput = document.getElementById("<%=lbCourseDescription.ClientID%>"); sender.argument = txtInput.innerHTML; } function clientClose(sender, args) { if (args.get_argument() != null) { var lbInput = document.getElementById("<%=lbCourseDescription.ClientID%>"); var txtInput = document.getElementById("<%=txCourseDescription.ClientID%>"); lbInput.innerHTML = args.get_argument(); txtInput.value = args.get_argument.htmlEncode(); } } </script>

Now when I click on btnCourseDescription and and assign value using popup data submits successfully but when I want to update any other field means I am not updating HTML formatted data, HARDERROR occurs:

A potentially dangerous Request.Form value was detected from the client (ctl00$cphMain$txCourseDescription="...ace="'MS Sans Serif&#...").

Please suggest me what should I do?

Category:javascript Views:17 Time:2018-05-13

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