What is this Error- htmlfile: Unknown Runtime Error?

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I have written the following AJAX code for getting response from .aspx page. But getting an error htmlfile: Unknown Runtime Error for the below line in bold:

C#

function CheckCode() {
var sname = document.getElementById('<%=txtName.ClientID %>').value;
if (sname != "" || sname != null) {
request = new XMLHttpRequest();
request.onreadystatechange = function () {
if (request.readyState == 4 && request.status == 200) {
document.getElementById('<%=lblNameError.ClientID %>').innerHTML = request.responseText;
}
}
var loc = "CheckCode.aspx?name=" + sname;
request.open("GET", loc, true);
request.send();
}
in Checkcode.aspx

//..some code
if (dr.Read())
{
checkno = 0;
Response.Write("already exists");
}
else
{
checkno = 1;
Response.Write("continue");
}

Posted 16-May-11 22:10pm

hemantwithu

Updated 16-May-11 22:41pm

walterhevedeich

v2

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Comments

Sergey Alexandrovich Kryukov 17-May-11 15:53pm

Not clear, because you need to show in which line of code it happens. You need to catch all exception and provide exception dump with stack and all inner exceptions, recursively.
--SA

2 solutions

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ProTrojan · Answer 1 · 2012-11-21T03:00:00

When you are sendind any response using "Response.Write(........)", then it may have some previous value.
try to clear it first and then ending it.

try this
=======================================================

C#

Response.Clear();   //Add this line
if (dr.Read())
{
checkno = 0;
Response.Write("already exists");
}
else
{
checkno = 1;
Response.Write("continue");
}
Response.End();    //And add this

=======================================================
And you are good to go. :)

thatraja · Answer 2 · 2011-05-17T21:01:00

Solution 1

Here you go for the solved link

ASP.NET UpdatePanel Error htmlfile: Unknown runtime error, updatePanelElement.innerHTML=rendering[^]

Posted 17-May-11 21:01pm

thatraja

Comments

ankitmahesh91186 14-Nov-11 6:37am

I also having the same issue.. plz help

thatraja 14-Nov-11 6:48am

Don't you check the link in my answer? See that for solution(s)