Asp.net gridview selectmethod loading issue

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Hi everyone,

In asp.net 4.7.1. I am trying to use VNext capabilities to load a GridView.
ItemType is set, SelectMethod is set.
In code behind the public IQueryable<itemtype> GetData() is set.
It loads data from a stored procedure. The datatable rows are converted to a List<model> object. That data is called in het GetData() method and casted to IQueryable

When I load the page I see the method is called.

It will not give data because I need to add the value of a DropDownList.SelectedValue.

When selecting an item from the DropDownlist the GetData() method is not called again.

What do I have to do to get that working?

What I have tried:

See 'describe the problem'section.

For DropDownList loading in the same way I do not have this problem

Posted 26-Jan-24 1:32am

Herman<T>.Instance

Updated 31-Jan-24 22:30pm

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Dave Kreskowiak 26-Jan-24 13:14pm

Ummm, what is this VNext you speak of?

Herman<T>.Instance 30-Jan-24 3:19am

Look at this story from Scott Guthrie from 2014.

Dave Kreskowiak 30-Jan-24 10:02am

Sigh. "vNext" refers to the "next version" of a product, not a product itself. So, you're not using "VNext capabilities".

Herman<T>.Instance 31-Jan-24 9:20am

read this than: vnext in asp.net. It is about a way to load the data

Dave Kreskowiak 31-Jan-24 11:57am

You seem to have a comprehension problem. From the article you linked:
The vNext releases of .NET and Visual Studio include a ton of great new features and capabilities.
Whever you see "vNext", it is ONLY ever referring to the next version of a product, be it ASP.NET, MVC, Visual Studio, SQL Server, Access, Word, Excel, Mahjong, Solitaire, ...

Dave Kreskowiak 31-Jan-24 12:01pm

In 2011, when Gu posted that blog entry, the current version of ASP.NET was 4.0, released in 2010.

In 2011, the "vNext" version of ASP.NET was released in 2012, as version 4.5, with Visual Studio 2012 and the .NET Framework 4.5.

vNext HAS NEVER BEEN NOR WILL EVER BE A TECHNOLOGY OR TECHNOLOGY STACK.

Herman<T>.Instance 1-Feb-24 4:30am

Sigh....This question was not about what VNext means, but why the data was not reloaded again.

Dave Kreskowiak 1-Feb-24 16:20pm

I quote: "trying to use VNext capabilities"
Whatever "capabilities" means when refering to "VNext". That makes no sense at all.

Herman<T>.Instance 2-Feb-24 10:11am

you must have the last word. Isn't it!

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Herman<T>.Instance · Accepted Answer · 2024-01-29T21:20:00

Solution 1

In the OnSelectedIndexChanged all you have to do is call DropDownList.DataBind() and the SelectMethod will be executed and the data will be loaded in the DropDownList

Posted 29-Jan-24 21:20pm

Herman<T>.Instance