GridView Show Header

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

ABHIJIT B - 06 Feb 2008 17:51 GMT

Hi,

I am using GridView in my web form and binding DataTable in code
behind file as given below.

gvUsersList.DataSource = dtUserList;
gvUsersList.DataBind();

If no records exists in DataTable GridView should display Coulmn
Header text.
In my case I have enabled following property,

gvUsersList.ShowHeader = true;

It is not working so tried following code which works for DataGrid but
not for GridView

dtUserList.Columns.Add(new DataColumn("LoginID",
typeof(string)));
dtUserList.Columns.Add(new DataColumn("FirstName",
typeof(string)));
dtUserList.Columns.Add(new DataColumn("LastName",
typeof(string)));

gvUsersList.DataSource = dtUserList;
gvUsersList.DataBind();
gvUsersList.ShowHeader = true;

Kindly help me where I am doing mistake or GridView property which
needs to be set.

Regards,
Abhijit B

Reply to this Message

Larry Bud - 06 Feb 2008 18:08 GMT

> Hi,
>
[quoted text clipped - 26 lines]
> Kindly help me where I am doing mistake or GridView property which
> needs to be set.

Unfortunately, that's how it works. A GridView won't show the header
unless there is data.

There is an EmptyDataText property which will display in the event
there is no data.

I haven't tried it, but your datasource could add an empty row of data
in case there are no rows.

Reply to this Message

Mark Moeykens - 06 Feb 2008 19:51 GMT

I tried what Larry Bud wrote with the GridView.EmptyDataText property. It
seems like it only shows just that text with no header. Probably used if you
want to give the user feedback if no data returned. It looked like this:

gvUsersList.EmptyDataText = "No Data Returned";
gvUsersList.DataSource = dtUserList;
gvUsersList.DataBind();

and rendered out as:
<table cellspacing="0" rules="all" border="1" id="gvUsersList"
style="border-collapse:collapse;">
<tr>
<td>No Data Returned</td>
</tr>
</table>

So I think you'll need to check for no rows and add an empty row:

if (dtUserList.Rows.Count == 0)
{
dtUserList.Rows.Add(new object[] { "" });
}

gvUsersList.DataSource = dtUserList;
gvUsersList.DataBind();

So you will see the GridView show up with a blank row as well.

Hope this helps,
Mark Moeykens

> Hi,
>
[quoted text clipped - 29 lines]
> Regards,
> Abhijit B

Reply to this Message

ABHIJIT B - 08 Feb 2008 20:26 GMT

Hi Larry ,Mark,

Thanks for reply.I agree with Mark by adding dummy row without any
data we can show header text in GridView.The Problem in my code is
that I am using checkbox as Template column.If I addd blank row it
shows other fields blank but checkbox visible.

Kindly need assistance from anyone.Is it possible to solve using AJAX.

Regards,
Abhijit B

On Feb 6, 2:51 pm, Mark Moeykens
<MarkMoeyk...@discussions.microsoft.com> wrote:

> I tried what Larry Bud wrote with the GridView.EmptyDataText property. It
> seems like it only shows just that text with no header. Probably used if you
[quoted text clipped - 64 lines]
>
> - Show quoted text -

Reply to this Message

Mark Moeykens - 08 Feb 2008 22:52 GMT

Ok, here's what you can do with the column that contains the checkbox.
Convert it to a template column. Then edit that column and give the checkbox
a meaningful name, say for example, "myCheckbox". Now, you want to make that
checkbox invisible if you added a blank row so you'll have to modify your
code to look something like this:

bool hideCheckBox = false;

if (dtUserList.Rows.Count == 0)
{
dtUserList.Rows.Add(new object[] { "" });
hideCheckBox = true;
}

gvUsersList.DataSource = dtUserList;
gvUsersList.DataBind();

((CheckBox)gvUsersList.Rows(0).FindControl("myCheckbox")).Visible =
hideCheckBox;

This could do it.
Mark Moeykens

> Hi Larry ,Mark,
>
[quoted text clipped - 78 lines]
> >
> > - Show quoted text -

Reply to this Message

GridView Show Header

Free Magazines