Asp net request time out calling an async webmethod in asmx from jquery


ASP.NET is a popular programming used for web applications. It provides a framework for developing dynamic websites and web services. One common issue that developers face is the request timeout when calling an asynchronous web method in ASMX from jQuery. In this article, we will explore this and a solution with examples.

The Problem

When making an asynchronous call to a web method in ASMX from jQuery, the request may time out if it too long to complete. This can happen when the web method performs a time-consuming operation or when there is a delay in the network. The default timeout for ASP.NET is 110 seconds, which may not be sufficient in some cases.


To this problem, we can increase the timeout value for the ASP.NET request. This can be done by modifying the web.config file of the ASP.NET application. Open the web.config file and locate the . Add the following code inside the section:

This code sets the timeout to 360 seconds (6 minutes). You can adjust the value according to your requirements.


Let's consider an example where we have a web method in ASMX that performs a time-consuming operation. We want to call this web method asynchronously from jQuery without facing any timeout issues.

First, let's create the ASMX file with the web method:

using System;
using System.Web.Services;

[WebService(Namespace = "")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class MyWebService : WebService
    public string PerformOperation()
        // Simulate a time-consuming operation

        return "Operation completed successfully";

Next, let's create the jQuery code to call this web method asynchronously:

    type: "POST",
    url: "MyWebService.asmx/PerformOperation",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    timeout: 600000, // Set the timeout value to 10 minutes
    success: function (response) {
        // Handle the response
    : function (xhr, status, error) {
        // Handle the error

In this example, we set the timeout value to 10 minutes (600000 milliseconds) to ensure that the request does not time out before the web method completes its operation. The success and error callbacks handle the response and error scenarios, respectively.


By increasing the timeout value for ASP.NET requests, we can avoid timeout issues when calling asynchronous web methods in ASMX from jQuery. This can be achieved by modifying the web.config file and setting the executionTimeout attribute. Additionally, we provided an example that demonstrates how to call an asynchronous web method without facing any timeout problems.

Remember to adjust the timeout value according to the specific requirements of your application.

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