Add linkbutton field to Gridview

[graphicsxp]

Hi,
I've added a linkbutton field to my gridview. Now I would like that
when the user clicks on it for a particular row, a server-side function
should be executed, which takes as parameters the id of the selected
row. How can I do that ?

Thanks

[Gary]

You'll want to capture the rowcommand event. The important thing to
remember is that this event is called at various times during loading,
and so you need to check the CommandName field of the event argument.

So if you're definition looks like this:

<asp:ButtonFiel d CommandName="Se lect" Text="Sel"></asp:ButtonField >

Your handler will need to look like this:

Protected Sub List_RowCommand (ByVal sender As Object, ByVal e As
System.Web.UI.W ebControls.Grid ViewCommandEven tArgs) Handles
List.RowCommand
If e.CommandName = "Select" Then
' Do work here
End If
End Sub

All this being said, a more '2.0' method is to use the CommandField
construct. So check in MSDN for GridView CommandField and check out
the SelectedIndexCh anged event.

Thanks,
Gary
graphicsxp wrote:

Hi,
I've added a linkbutton field to my gridview. Now I would like that
when the user clicks on it for a particular row, a server-side function
should be executed, which takes as parameters the id of the selected
row. How can I do that ?

Thanks

[Jesse Liberty]

Attached is a very small web site that does what you want (zipped). The
steps are:

1. Create the web site
2. Drag the customers table from Northwind onto the page to create a data
source control and a grid
3. use the smart tag in the grid to add a new (command field) column. I
added a button field and set its command name to Select, its button type to
Link its header to My Button Field and its text (creatively) to My Button.
4. Click on the grid and set its RowCommand Event as follows:

protected void GridView1_RowCo mmand( object sender, GridViewCommand EventArgs
e )
{
int index = Convert.ToInt32 ( e.CommandArgume nt );
myFunction( index );
}

This grabs the index of the row from the CommandArgument property of the
GridViewCommand EventArgs passed into the event. You can then use it in your
server side method, thus...

private void myFunction (int rowIndex)
{
Response.Write ("Do some action with row " + rowIndex.ToStri ng());
}

Remember, however that the rows are zero-based (the first row is row zero.

Best of luck.
--

Jesse Liberty
Author, Programmer
Microsoft MVP
"graphicsxp " <sa************ *@googlemail.co mwrote in message
news:11******** *************@m 79g2000cwm.goog legroups.com...

Hi,
I've added a linkbutton field to my gridview. Now I would like that
when the user clicks on it for a particular row, a server-side function
should be executed, which takes as parameters the id of the selected
row. How can I do that ?

Thanks

[graphicsxp]

Hi,
thank for the reply.
I can't see any attachments....

First probleme is that if I create a commandfield column, there is no
commandname property ?

Jesse Liberty wrote:

Attached is a very small web site that does what you want (zipped). The
steps are:

1. Create the web site
2. Drag the customers table from Northwind onto the page to create a data
source control and a grid
3. use the smart tag in the grid to add a new (command field) column. I
added a button field and set its command name to Select, its button type to
Link its header to My Button Field and its text (creatively) to My Button.
4. Click on the grid and set its RowCommand Event as follows:

protected void GridView1_RowCo mmand( object sender, GridViewCommand EventArgs
e )
{
int index = Convert.ToInt32 ( e.CommandArgume nt );
myFunction( index );
}

This grabs the index of the row from the CommandArgument property of the
GridViewCommand EventArgs passed into the event. You can then use it in your
server side method, thus...

private void myFunction (int rowIndex)
{
Response.Write ("Do some action with row " + rowIndex.ToStri ng());
}

Remember, however that the rows are zero-based (the first row is row zero.

Best of luck.
--

Jesse Liberty
Author, Programmer
Microsoft MVP
"graphicsxp " <sa************ *@googlemail.co mwrote in message
news:11******** *************@m 79g2000cwm.goog legroups.com...

Hi,
I've added a linkbutton field to my gridview. Now I would like that
when the user clicks on it for a particular row, a server-side function
should be executed, which takes as parameters the id of the selected
row. How can I do that ?

Thanks

[Gary]

Sorry, should have been more specific, but I had to run. What you'd do
with the commandfield approach is use a GridView something like this:

<asp:GridView ID="MyList" runat="server" DataKeyNames="M yTableKey">
<Columns>
<asp:CommandFie ld SelectText="Sel ect" ShowSelectButto n="True" />
</Columns>
</asp:GridView>

Then in the code you'd trap the event like this:

Protected Sub MyList_Selected IndexChanged(By Val sender As Object, ByVal
e As System.EventArg s) Handles MyList.Selected IndexChanged
' Obtain the database key defined in the DataKeyNames attribute of
the GridView tag
Dim theKey As Int32 = MyList.Selected DataKey.Value
' Do work here
End Sub

In this way you can easily capture the key associated with the selected
row. I hope this helps.

Thanks,
Gary

[graphicsxp]

Thanks for replying.

Actually I've achieved it by doing this:

<asp:TemplateFi eld ShowHeader="Fal se" >
<ItemStyle width="50px" HorizontalAlign ="Center"
VerticalAlign=" Middle" />
<ItemTemplate >
<asp:LinkButt on ID="lnkScrap" CommandName="Sc rap" runat="server"
CommandArgument ='<%# Bind("CuttingID ")%>' Text="Scrap It"

></asp:LinkButton>

</ItemTemplate>
</asp:TemplateFie ld>
Protected Sub grdCuttings_Row Command(ByVal sender As Object, ByVal e
As System.Web.UI.W ebControls.Grid ViewCommandEven tArgs) Handles
grdCuttings.Row Command
If e.CommandName = "Scrap" Then
'I do my stuff here
End If
End Sub


Gary wrote:

Sorry, should have been more specific, but I had to run. What you'd do
with the commandfield approach is use a GridView something like this:

<asp:GridView ID="MyList" runat="server" DataKeyNames="M yTableKey">
<Columns>
<asp:CommandFie ld SelectText="Sel ect" ShowSelectButto n="True" />
</Columns>
</asp:GridView>

Then in the code you'd trap the event like this:

Protected Sub MyList_Selected IndexChanged(By Val sender As Object, ByVal
e As System.EventArg s) Handles MyList.Selected IndexChanged
' Obtain the database key defined in the DataKeyNames attribute of
the GridView tag
Dim theKey As Int32 = MyList.Selected DataKey.Value
' Do work here
End Sub

In this way you can easily capture the key associated with the selected
row. I hope this helps.

Thanks,
Gary