Calling web service using javascript error
- by politrok
Hi ,
I try to call webservice using json , when i call to web service without excepted parameters , its work ,
but when i'm try to send parameter , ive got an error :
This is my code:
function GetSynchronousJSONResponse(url, postData)
{
var xmlhttp = null;
if (window.XMLHttpRequest)
xmlhttp = new XMLHttpRequest();
else if (window.ActiveXObject) {
if (new ActiveXObject("Microsoft.XMLHTTP"))
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
else
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
}
url = url + "?rnd=" + Math.random(); // to be ensure non-cached version
xmlhttp.open("POST", url, false);
xmlhttp.setRequestHeader("Content-Type", "application/json; charset=utf-8");
xmlhttp.send(postData);
var responseText = xmlhttp.responseText;
return responseText;
}
function Test()
{
var result = GetSynchronousJSONResponse('http://localhost:1517/Mysite/Myservice.asmx/myProc', '{"MyParam":"' + 'test' + '"}');
result = eval('(' + result + ')');
alert(result.d);
}
This is the error :
System.InvalidOperationException: Request format is invalid: application/json; charset=utf-8.
at System.Web.Services.Protocols.HttpServerProtocol.ReadParameters()
at System.Web.Services.Protocols.WebServiceHandler.CoreProcessRequest
What is wrong ?
Thanks in advance .
