Question

I have binded a data grid to an array. Also, there is a button there to delete the row. The problem is that I am not sure how to implement it since the data source is an array.

See below

  <Columns>    
     <asp:TemplateColumn>        
            <ItemTemplate>          
       <asp:Label ID="lblItems" runat="server" Text='<%# Container.DataItem>' />         
       </ItemTemplate>    
     </asp:TemplateColumn>     
        <asp:ButtonColumn ButtonType="PushButton" CommandName="Delete" Text="Delete">
          </asp:ButtonColumn>
                 </Columns> 

and here I would like to implement it..

   private void DataGrid1_DeleteCommand(object source,
                  System.Web.UI.WebControls.DataGridCommandEventArgs e)
    {
        int rowToDelete = e.Item.ItemIndex;

        myDataGrid.DataBind();
    }

In the code for the deletion, how can I access the index of my array based on the button clicked (per row)?

Answer 1

Here is an example

Markup.

<asp:DataGrid ID="DataGrid1" runat="server"
        AutoGenerateColumns="False" 
        OnDeleteCommand="DataGrid1_DeleteCommand">
    <Columns>
        <asp:TemplateColumn HeaderText="Name">
            <ItemTemplate>
                <asp:Label ID="lblItems" runat="server" 
                    Text='<%# Container.DataItem %>'>
                </asp:Label>
            </ItemTemplate>
        </asp:TemplateColumn>
        <asp:ButtonColumn ButtonType="PushButton" 
                CommandName="Delete" 
                HeaderText="Actions" 
                Text="Delete">
        </asp:ButtonColumn>
    </Columns>
</asp:DataGrid>

Code-behind.

private static string[] names = new string[] { "Matt", "Joanne", "Robert" };
protected void Page_Load(object sender, EventArgs e)
{
    if(!IsPostBack)
    {
        BindGrid();
    }
}
private void BindGrid()
{
    DataGrid1.DataSource = names;
    DataGrid1.DataBind();
}
protected void DataGrid1_DeleteCommand(object source, DataGridCommandEventArgs e)
{
    string deletedItem = ((Label) DataGrid1.Items[e.Item.ItemIndex].FindControl("lblItems")).Text;
    names = names.Where(val => val != deletedItem).ToArray();
    BindGrid();
}

Hope this helps.