ajax call to a static method

Sie Ste

I am having a problem with an ajax call to a shared (static) vb.net function to obtain data from the database.

In a vb.net 2010 web form application, I needed to make a call from a javascript function to a shared (static) function to

obtain data from a sql server 2012 database. The first ajax call below is the original call and the second call is the one

I came up by copying the first call.

The problem is the first call always occurs before the second ajax call regardless of what I do with the code. There are cases when I

only want the second call to occur. By stepping through the code, I see that there is alot of jquery code that occurs.

$.ajax({

type: "POST",

contentType: "application/json; charset=utf-8",

url: document.location.pathname + "/GetStudentLetter",

data: "{ " + strData + " }",

dataType: "json",

success: function (data) {

LoadEditor(JSON.parse(data.d), milestone);

error: AjaxFailed

});

if (milestone == '999') {

$.ajax({

type: "POST",

contentType: "application/json; charset=utf-8",

url: document.location.pathname + "/Gettattschyr",

data: "{ " + strData + " }",

dataType: "json",

success: function (data) {

successtest(eval(data));

error: AjaxFailed

});

}

function successtest(sletter) {

var sle = sletter

_txtattschyr = sletter.d

if (_txtattschyr > '1') {

alert('You have selected student(s) having more than one Entry for the current school year. ');

return

}

Thus would you tell me what you think is wrong and/or tell me how I can change the second ajax call to try to solve this issue?

8 Replies

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Manas Mohapatra10y ago
error: AjaxFailed
}).done(function() {
// Call other function to execute other scripts
PerformOperation();
});
done() fires when your request completes. As per your require you are sending multiple times AJAX request to server. In side done(), you can call user defined method or write code to call AJAX again.
Sie Ste10y ago
What other code would you add specifically to this section?
error: AjaxFailed
}).done(function() {
// Call other function to execute other scripts
PerformOperation();
});
Sie Ste10y ago
What other code would you add specifically to thissection?
Manas Mohapatra10y ago
You can use async : false in AJAX :
$.ajax({
...
async: false,
...
});

However, async is getting deprecated, you can use done() like:

$.ajax({
    type: "POST",
    contentType: "application/json; charset=utf-8",
    url: document.location.pathname + "/GetStudentLetter",
    data: "{ " + strData + " }",
    dataType: "json",
    success: function (data) {
        LoadEditor(JSON.parse(data.d), milestone);
    },
    error: AjaxFailed
}).done(function() {
    // Call other function to execute other scripts
    PerformOperation();
});
Jinish Gandhi10y ago
put the ajax both the different javacript section and whatever you want to call . call it

Step-1
view page code with two javascript ajax call first check the username is valid and other one is for list of data
@model MvcApplication4.Models.Employee
@{
ViewBag.Title = "Create";
}
Create
@Html.AntiForgeryToken()
@Html.ValidationSummary(true)

Employee

@Html.LabelFor(model => model.Name)

@Html.EditorFor(model => model.Name)
@Html.ValidationMessageFor(model => model.Name)

@Html.LabelFor(model => model.subject)

@Html.EditorFor(model => model.subject)
@Html.ValidationMessageFor(model => model.subject)

@section Scripts {
@Scripts.Render("~/bundles/jqueryval")

________________________________________________________________________________________

--ajax call
}

___________________________________________________________________________________________________

2-(Controller part)
for show the data on list and other is for the username is already there or not

[HttpPost]
public JsonResult chkUserName(string name, Employee emp)
{
JsonResult _Result = new JsonResult();
var status = "";
using (db)
{
var v = db.Employees.Where(u => u.Name == name).FirstOrDefault();
if (v == null)
{
status = "Success";
}
else
{
status = "Fail";
}
}
return Json(new JsonUtilities { Status = status });
// return Json(JsonRequestBehavior.AllowGet);
}

public ActionResult Create()
{
return View();
}
//
// POST: /Home1/Create
[HttpPost]
// [ValidateAntiForgeryToken]

public ActionResult Create(Employee employee)
{
//chkUserName(null,null);
if (ModelState.IsValid)
{
db.Employees.Add(employee);
db.SaveChanges();
// return RedirectToAction("Index");
}
List iList = new List();
iList = db.Employees.ToList();
return View("Index", iList);
}

use that code .it will be definately help
Midhun Tp10y ago
Hi, you can call using ajax itself. But here what is your actual problem? Is your ajax call not working? Or do you want the ajax to be called only at certain times?
Sie Ste10y ago
I need the ajax to be called since it is used from a javascript function. The only way that I know how to make a database call from javascript is to use ajax and jquery to call a static method on the main web page.
Is there another way? If so, can you tell me what the other way is and show me the code and/or point me to a url that shows how to implement your suggestion?
Midhun Tp10y ago
Hi,
Couldn't understand your problem. If you don't need first ajax to be called always, then put it inside a function and call it whenever necessary.

ajax call to a static method

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