[Solved] GridTemplateColumn Checkbox disappears after clicking Delete command button

[RJ]

Hi I was able to create dynamic column creation using code behind but I'm having a problem when I click on delete button, my gridTemplateColumn checkbox disappears.
Heres my code:

<rad:radgrid id="RadGrid1" runat="server" Height="200px" AllowMultiRowSelection="True" ForeColor="White" AllowMultiRowEdit="True" Skin="outlook" width="985px" ItemStyle-BackColor="WhiteSmoke" AlternatingItemStyle-BackColor="White" BorderStyle="None" GridLines="Both">

<AlternatingItemStyle Font-Size="Small" Font-Names="Arial Narrow" HorizontalAlign="Left" VerticalAlign="Middle" BorderStyle="None" CssClass="AlternatingItemRow" BackColor="White"></AlternatingItemStyle>

<MasterTableView DataKeyNames="ID" AllowAutomaticInserts="True" EditMode="InPlace" CommandItemDisplay="Top" AutoGenerateColumns="False">

<CommandItemStyle BackColor="#FFE39A"></CommandItemStyle>
<ItemStyle HorizontalAlign="Left" VerticalAlign="Middle"></ItemStyle>





<CommandItemTemplate>
    <table class="MyCommandItemClass" width="100%">
    <tr>
                                        <td align="left" style="width: 75%; padding-top:4px">
                                            <asp:Label ID="lblPN" runat="server" Text="PlanName" CssClass="basicfontbold" ForeColor="black" Font-Size="12px" Visible="true"></asp:Label>


                                        </td>

                                        <td align="right">
                                        <asp:Button id="btnAdd" Runat="server" CommandName="InitInsert"  ToolTip="Add New Record" Text="Add" CssClass="ButtonGray" Visible='<%# Not RadGrid1.MasterTableView.IsItemInserted and showInsert %>' />

                                            <asp:Button ID="PerformInsert" runat="server" CommandName="PerformInsert"  ToolTip="Save" CssClass="ButtonRed" Text="Save" Visible='<%# RadGrid1.MasterTableView.IsItemInserted and showInsert %>'/>
                                            <asp:Button ID="CancelInsert" runat="server" CommandName="CancelInsert" ToolTip="Cancel" CssClass="ButtonGray" Text="Cancel" Visible='<%# RadGrid1.MasterTableView.IsItemInserted and showInsert %>'/>

                                           <asp:Button id="Linkbutton1" Runat="server" CommandName="DeleteChecked" Text="Delete" CssClass="ButtonGray" Visible='<%# Not RadGrid1.MasterTableView.IsItemInserted and showDelete %>' Enabled='<%# showDelete %>'/>



                                        </td>
                                                                            </tr>
                                </table>
                            </CommandItemTemplate>
                            <ExpandCollapseColumn>
                                <HeaderStyle Width="20px"></HeaderStyle>
                            </ExpandCollapseColumn>
                            <FooterStyle BorderStyle="None" BackColor="#FFE39A"></FooterStyle>
                        </MasterTableView>

                        <HeaderStyle Font-Size="Small" Font-Names="Arial Narrow" Font-Bold="True" ForeColor="White" ></HeaderStyle>
                        <SelectedItemStyle CssClass="RadGridSelectedItem"></SelectedItemStyle>
                        <ItemStyle Font-Size="Small" Font-Names="Arial Narrow" HorizontalAlign="Left" VerticalAlign="Middle"></ItemStyle>
                        <ClientSettings>
                            <Selecting AllowRowSelect="True" EnableDragToSelectRows="False"></Selecting>
                            <Resizing ResizeGridOnColumnResize="True" AllowColumnResize="True"></Resizing>
                            <ClientEvents OnRowDeselected="RowDeselected" OnRowSelected="RowSelected" OnRowCreated="RowCreated"></ClientEvents>
                            <Scrolling ScrollHeight="202px" AllowScroll="True" UseStaticHeaders="True" SaveScrollPosition="true" FrozenColumnsCount="5"></Scrolling>
                        </ClientSettings>
                    </rad:radgrid>

Code behind

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load, Me.Load

If Not IsPostBack Then

Try

Dim boundColumn As GridBoundColumn

boundColumn = New GridBoundColumn()

RadGrid1.MasterTableView.Columns.Add(boundColumn)

boundColumn.HeaderText = "ID"

boundColumn.DataField = "ID"

boundColumn.UniqueName = "ID"

boundColumn.ItemStyle.HorizontalAlign = HorizontalAlign.Left

boundColumn.ItemStyle.VerticalAlign = VerticalAlign.Middle

boundColumn.ReadOnly = True

boundColumn.Visible = False

Catch ex As Exception

End Try

Try

Dim templateColumnName As String = "Delete"

Dim templateColumn As New GridTemplateColumn()

templateColumn.ItemTemplate = New GridCheckboxTemplate(templateColumnName)

templateColumn.HeaderImageUrl = "images/delete.gif"

templateColumn.ItemStyle.HorizontalAlign = HorizontalAlign.Center

templateColumn.HeaderStyle.HorizontalAlign = HorizontalAlign.Left

templateColumn.ItemStyle.VerticalAlign = VerticalAlign.Middle

templateColumn.HeaderStyle.Width = Unit.Pixel(23)

templateColumn.ItemStyle.Width = Unit.Pixel(35)

RadGrid1.MasterTableView.Columns.Add(templateColumn)

Catch ex As Exception

End Try               Several more columns defined here.....             RadGrid1 Code Binding here.......

end if

end sub

Private Class GridCheckboxTemplate

Implements ITemplate

Protected boolValue As CheckBox

Private colname As String

Public Sub New(ByVal cName As String)

colname = cName

End Sub

Public Sub InstantiateIn(ByVal container As System.Web.UI.Control) Implements ITemplate.InstantiateIn

boolValue = New CheckBox()

boolValue.ID = "CheckBox1"

AddHandler boolValue.DataBinding, AddressOf boolValue_DataBinding

boolValue.Enabled = True

boolValue.AutoPostBack = False

container.Controls.Add(boolValue)

End Sub

Sub boolValue_DataBinding(ByVal sender As Object, ByVal e As EventArgs)

Dim cBox As CheckBox = DirectCast(sender, CheckBox)

Dim container As GridDataItem = DirectCast(cBox.NamingContainer, GridDataItem)

End Sub

End Class

Im using the checkbox column template to delete all items thats been checked.
Any feedback would be appreciated.

Thanks in advance,
RJ

[Princy]

Hello RJ,

Try creating the Template column in the Page_Init event rather than creating them in the Page_Load event. When checking for the  Not IsPostBack condition and then adding the columns, the columns does not persist on postback. Check out the section 'Creating template columns programmatically' following help document to understand better:
Programmatic creation

Thanks
Princy.

[RJ]

Thanks princy page init did the job but it also made some duplicates with my gridBoundColumn. Any workaround with this one?