I am using ckeditor to format some data inside my textarea
According to this question the maximum practical length of a URL is 2000 characters. This isn't going to be able to hold a massive Wikipedia article like you're trying to send.
Instead of putting the data on the URL you should be putting it in the body of a POST request. You need to add a data
value to the object you're passing to the ajax function call. Like this:
function editAbout(){
var about=escape( $("#editorAbout").text());
$.ajax({
url: "Allcammand.aspx?cmd=EditAboutCompany&idCompany="+getParam("idCompany"),
type:"post",
async: false,
data: {
about: about
},
success: function(response){
},
error:function(xhr, ajaxOptions, thrownError){alert(xhr.responseText); ShowMessage("??? ?? ?????? ??????? ????","fail");}
});
}