JSON字符串终止于大约3900-4000个字符

Question

例外

org.json.JSONException：3990 [字符3991第1行]处的未终止字符串

JavaScript代码

[HttpPost]
public ActionResult Index(CreateUser model)
{
    //Domain name
    var domainName = "XXX";
    //Fully distinguished name of OU to create user in
    var location = model.Location;
    var userOU = "OU=" + location + ",OU=XXX,DC=XXX,DC=com"; 

    using (var pc = new PrincipalContext(ContextType.Domain, domainName, userOU))
    {
        using (var up = new UserPrincipal(pc))
        {
            //Creates username and display name from firstname and lastname
            **var userName = model.FirstName[0].ToString().ToLower() + model.LastName.ToString().ToLower();**

            var displayName = model.FirstName + " " + model.LastName;
            var password = "XXX";

            up.Name = displayName;
            up.DisplayName = displayName;
            up.GivenName = model.FirstName;
            up.MiddleName = model.MiddleI;
            up.Surname = model.LastName;
            up.SamAccountName = userName;
            up.EmailAddress = userName + "@XXX.com";
            up.UserPrincipalName = userName + "@XXX.com";
            up.SetPassword(password);
            up.Enabled = true;
            up.ExpirePasswordNow();

            try
            {
                //Attempt to save the account to AD
                up.Save();
            }
            catch (Exception e)
            {
                ModelState.AddModelError("", "Exception creating user object. " + e);
                return View(model);
            }

            //Set department to add
            DirectoryEntry entry = up.GetUnderlyingObject() as DirectoryEntry;

            //DirectoryEntry group = entry.Children.Add("CN="+ )
            entry.Properties["department"].Value = model.Department;
            //entry.Properties["member"].Add(up);
            try
            {
                //try and commit the changes
                entry.CommitChanges();
            }
            catch(Exception e)
            {
                ModelState.AddModelError("", "Exception adding department. " + e);
                return View(model);
            }
        }
    }

    //Redirect to completed page if successful
    return RedirectToAction("Completed");

}//POST Index

代码在下面的行中失败。

 function dialogUpdateConfirm(action) {
$('#dialogConfirm').dialog({
    title : Update',
    bgiframe : true,
    width : 500,
    height : 200,
    autoOpen : false,
    modal : true,
    show : 'fold',
    hide : 'blind',
    resizable : false,
    buttons : { 
        Yes : function() { 
            $(this).dialog("close");
            var json = new Object();
            json.arr = jsonSaveObject;

            console.log(JSON.stringify(json));
  // This output to the console is not getting cut off. But  the jsonWFSManual is getting cut off once the java code executes.



  window.location.href = 'updatemanual?action=' + action + '&jsonWFSManual=' + JSON.stringify(json);
        }, 
        No : function() { $(this).dialog("close"); }
    }
});

这里有字符限制问题吗？