Can anyone help me with this.
I have a datagrid on a page which is used to show different views from
SQL-Server.
With autogenerate columns, this works fine for me. But now I want a checkbox
before every caption in the header. With this checkbox I'm goint to determine
if the user wants that field in his/her final print or export.

I'm able to add the checkbox on designtime by using Itemtemplates, but I can
not get this to work on runtime.

Thanks in advance

Hi Victor,
Shouldn't you be adding the checkbox control in the
<HeaderTemplate></HeaderTemplate> instead of <ItemTemplate>? then in the
ItemDataBound event of the datagrid, write:
public void DataGrid1_ItemDataBound(object sender, DataGridItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Header)
{
CheckBox myCheckbox = (CheckBox)e.Item.FindControl("CheckBox1");
if (myCheckbox != null)
{
// Inject clientside click event to capture the checkbox's value
and put it into a hidden field txtColumnSelected
myCheckbox.Attributes.Add("onclick",
"document.all.txtColumnSelected.value = " + myCheckbox.checked);
}
}
}

Hope that's what you're looking for.
Calvin.

"Victor Heijke" wrote:

> Can anyone help me with this.
> I have a datagrid on a page which is used to show different views from
> SQL-Server.
> With autogenerate columns, this works fine for me. But now I want a checkbox
> before every caption in the header. With this checkbox I'm goint to determine
> if the user wants that field in his/her final print or export.
>
> I'm able to add the checkbox on designtime by using Itemtemplates, but I can
> not get this to work on runtime.
>
> Thanks in advance

Thanks for your reaction, you are right.
I'm not even able to add the items to the header on runtime.
If I use something like this in ItemDataBound

Dim chkBox As CheckBox
Try

If e.Item.ItemType = ListItemType.Header Then
chkBox = New CheckBox
e.Item.Controls.Add(chkBox)
End If
Catch ex As Exception
Response.Write(ex.Message)
End Try

than I get a 'TableRow' cannot have children of type 'CheckBox'. error

Any ideas?

Victor

"Calvin KD" wrote:

> Hi Victor,
> Shouldn't you be adding the checkbox control in the
> <HeaderTemplate></HeaderTemplate> instead of <ItemTemplate>? then in the
> ItemDataBound event of the datagrid, write:
> public void DataGrid1_ItemDataBound(object sender, DataGridItemEventArgs e)
> {
> if (e.Item.ItemType == ListItemType.Header)
> {
> CheckBox myCheckbox = (CheckBox)e.Item.FindControl("CheckBox1");
> if (myCheckbox != null)
> {
> // Inject clientside click event to capture the checkbox's value
> and put it into a hidden field txtColumnSelected
> myCheckbox.Attributes.Add("onclick",
> "document.all.txtColumnSelected.value = " + myCheckbox.checked);
> }
> }
> }
>
> Hope that's what you're looking for.
> Calvin.
>
> "Victor Heijke" wrote:
>
> > Can anyone help me with this.
> > I have a datagrid on a page which is used to show different views from
> > SQL-Server.
> > With autogenerate columns, this works fine for me. But now I want a checkbox
> > before every caption in the header. With this checkbox I'm goint to determine
> > if the user wants that field in his/her final print or export.
> >
> > I'm able to add the checkbox on designtime by using Itemtemplates, but I can
> > not get this to work on runtime.
> >
> > Thanks in advance

Hi Victor,
First of all, I'd like to establish that you're using .Net Framework 1.1
aren't you? because my solution only works with 1.1, not 2.0.
OK, I always use an HTML Table rather than the Webcontrol table. Here's what
i do:
<aspataGrid ...>
<HeaderTemplate>
<Table id="..." ... runat="server">
<tr>
<td width="10%"><asp:CheckBox id="CheckBox1" ...> Column1
Header</td>
<td width="10%"><asp:CheckBox id="CheckBox2" ...> Column2
Header</td>
...
</tr>
</Table>
</HeaderTemplate>
</aspataGrid>

The check boxes are created at design time rather than at runtime. Once
that's done, use the solution that i previously proposed to try and obtain
the values from those checkboxes.

Let me know if still have problems. More than happy to help you out.
Cheers,
Calvin
"Victor Heijke" wrote:

> Thanks for your reaction, you are right.
> I'm not even able to add the items to the header on runtime.
> If I use something like this in ItemDataBound
>
> Dim chkBox As CheckBox
> Try
>
> If e.Item.ItemType = ListItemType.Header Then
> chkBox = New CheckBox
> e.Item.Controls.Add(chkBox)
> End If
> Catch ex As Exception
> Response.Write(ex.Message)
> End Try
>
> than I get a 'TableRow' cannot have children of type 'CheckBox'. error
>
> Any ideas?
>
> Victor
>
> "Calvin KD" wrote:
>
> > Hi Victor,
> > Shouldn't you be adding the checkbox control in the
> > <HeaderTemplate></HeaderTemplate> instead of <ItemTemplate>? then in the
> > ItemDataBound event of the datagrid, write:
> > public void DataGrid1_ItemDataBound(object sender, DataGridItemEventArgs e)
> > {
> > if (e.Item.ItemType == ListItemType.Header)
> > {
> > CheckBox myCheckbox = (CheckBox)e.Item.FindControl("CheckBox1");
> > if (myCheckbox != null)
> > {
> > // Inject clientside click event to capture the checkbox's value
> > and put it into a hidden field txtColumnSelected
> > myCheckbox.Attributes.Add("onclick",
> > "document.all.txtColumnSelected.value = " + myCheckbox.checked);
> > }
> > }
> > }
> >
> > Hope that's what you're looking for.
> > Calvin.
> >
> > "Victor Heijke" wrote:
> >
> > > Can anyone help me with this.
> > > I have a datagrid on a page which is used to show different views from
> > > SQL-Server.
> > > With autogenerate columns, this works fine for me. But now I want a checkbox
> > > before every caption in the header. With this checkbox I'm goint to determine
> > > if the user wants that field in his/her final print or export.
> > >
> > > I'm able to add the checkbox on designtime by using Itemtemplates, but I can
> > > not get this to work on runtime.
> > >
> > > Thanks in advance