Why it is null?

[etam]

Hi, does anyone know why o == null?!

protected void ShowProjectsGridView_SelectedIndexChanged(object
sender, EventArgs e) {
Object o = ProjectsGridView.SelectedRow.DataItem;
//...
}

Thanks,
Etam.

 

[Mark Rae]

Hi, does anyone know why o == null?!

protected void ShowProjectsGridView_SelectedIndexChanged(object
sender, EventArgs e) {
Object o = ProjectsGridView.SelectedRow.DataItem;
//...
}

Thanks,
Etam.

Have you forgotten to specify the DataKeyNames property in the
<asp:GridView> tag...?

 

[etam]

Mark Rae napisa (a):

Have you forgotten to specify the DataKeyNames property in the
<asp:GridView> tag...?

No, it is set to "id".

 

[Mark Rae]

Mark Rae napisa (a):

No, it is set to "id".

???

You actually have a field in your database table called 'id'...???

 

[etam]

You actually have a field in your database table called 'id'...???

Yes . Strange for me is that
Int64 id = (Int64)ProjectsGridView.SelectedDataKey.Value;
is OK :/.

Regards,
Etam.

 

[Eliyahu Goldin]

DataItem property is available only in RowDataBound. It makes a lot of sense
if you think about it since this event is the only time when grid items
actually meet their datasources.

--
Eliyahu Goldin,
Software Developer & Consultant
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

 

[etam]

DataItem property is available only in RowDataBound. It makes a lot of sense
if you think about it since this event is the only time when grid items
actually meet their datasources.

So what for is the DataItem property in GridViewRow?

Regards,
Etam.

 

[Eliyahu Goldin]

It does get the data object that supplies data to the rows but it does it
only during the RowDataBound event. In all other times it returns null.

--
Eliyahu Goldin,
Software Developer & Consultant
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

 

[etam]

It does get the data object that supplies data to the rows but it does it
only during the RowDataBound event. In all other times it returns null.

Thanks! It explains a lot . Could You give me a link where can I
read about it from?

Regards,
Etam.

 

[Eliyahu Goldin]

msdn library is good enough:

http://msdn2.microsoft.com/en-us/library/system.web.ui.webcontrols.gridviewrow.dataitem.aspx

--
Eliyahu Goldin,
Software Developer & Consultant
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net