Call a gridview from inside a public shared function?

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Hi,

My problem is that I am using the shown below code:

XML

<System.Web.Services.WebMethod()> _
    Public Shared Function GetCurrentTime()

...

C#

    GridView1.DataSource = SqlDataSource1
    GridView1.DataBind()


End Function

I am getting the error:

C#

Cannot refer to an instance member of a class from within a shared method or shared member initializer without an explicit instance of the class.

Please help me fix this problem. Forum members, don't just tell the problem with the code but also post a relevant code that can fix the problem.

Thanks in Advance.

What I have tried:

VB.NET

Public Shared Function GetCurrentTime()

...

C#

    GridView1.DataSource = SqlDataSource1
    GridView1.DataBind()


End Function

Posted 11-Dec-16 3:25am

ZohaibRazaTheDProgrammer

Updated 11-Dec-16 23:19pm

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OriginalGriff · Answer 1 · 2016-12-11T04:56:00

You can't access instance members from within Shared methods: that is the whole point of Shared - it declares a method that operates without an instance being needed or even ever created. Shared methods do not have any access to a Me object reference.

If you want to access controls (or other non-shared objects in your class) the method cannot be Shared - it must be a normal instance method.

F-ES Sitecore · Answer 2 · 2016-12-11T23:19:00

That's not your real problem, your real problem is that you're trying to access server controls via a webmethod. When you do a form postback you send a lot of data to the server and it goes through the asp.net page lifecycle. This allows asp.net to re-create the state of your controls and to update them, and that updated state is then converted into html to be shown in the browser. When you call a web method the only data sent is the data in the parameters, so .net can't recreate the controls, it doesn't run the whole page lifecycyle, and as the web method doesn't result in the whole page being re-endererd you can't update the controls in your web method either.

For what you want to do you should look at the UpdatePanel as that is a component designed to facilitate what you're trying to do, ie update the controls via ajax.

Call a gridview from inside a public shared function?

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