To access controls inside static method

Question

In the below code i have a static method i want to access controls like gridview .But it throws object reference error.I tried like the below link :How to access page controls inside a static web method?. Pls help me to solve the issue.

     [WebMethod]
            public static void Grade()
{
     if (HttpContext.Current != null)
                {
                    Page page = (Page)HttpContext.Current.Handler;
                    GridView gd = (GridView)page.FindControl("gdgrade");//null value
                    DataSet ds = GradeSystem.GradeSystem();
                    gd.DataSource = ds.Tables[0];
                    gd.DataBind();


                }
    }

Ugh, you should avoid doing this completely (assuming it's possible, which the answer you linked to suggests it isn't). If you need to bind some data to the table, have your method return the data, and have the client side format it and display it. — mason, Sep 21 '15 at 18:52

score 1 · Answer 1 · answered Sep 21 '15 at 18:53

1

"The whole point of [WebMethod]s is that they don't run the ASP.Net page lifecycle. This way, they're fast and parallelizable. Your controls don't exist." - from the example you cited... reading the text and not just the code is often helpful ;)

If you want to load the grid, use a jquery AJAX call to a webmethod that returns the data you want:

http://www.codeproject.com/Tips/775585/Bind-Gridview-using-AJAX

answered Sep 21 '15 at 18:53

Clay Sills

235
1
9

i have controls like edit,delete,view in gridview will this functionalities can be done through ajax – Dotnet Sep 21 '15 at 18:56
Yup! You just need a separate ajax call and control method for each action. Welcome to REST! – Clay Sills Sep 21 '15 at 18:57
I am asking can i bind gridview with these controls – Dotnet Sep 21 '15 at 18:59
Actually, this one is probably a lot clearer for you: http://www.asp.net/web-api/overview/older-versions/build-restful-apis-with-aspnet-web-api – Clay Sills Sep 21 '15 at 19:05

To access controls inside static method

1 Answers1