Script GridClientSelectColumn Header Object From Server-Side

[codispdp]

How can I check the ClientSelectColumn checked state in the header from CodeBehind on the ItemCommand event?

[Shinu]

Hi,

Try using a GridTemplateColumn with a Checkbox in the HeaderTemplate and ItemTemplate for selecting the Grid rows instead of using GridClientSelectColumn. So that you can check the header checkbox in the ItemCommand event. Here I  have added a button in the commandItemTemplate and in its click event I am accessing the header check box and checking it.

ASPX:

<MasterTableView DataSourceID="SqlDataSource1" CommandItemDisplay="top"  >
     <CommandItemTemplate>
        <asp:LinkButton ID="LinkButton1" runat="server" Text="Check" CommandName="Check" ></asp:LinkButton>
    </CommandItemTemplate>

  <Columns>

      <telerik:GridTemplateColumn    HeaderText="TempCol"  DataField="ProductName"  UniqueName="TempCol" >
       <HeaderTemplate>
             <asp:CheckBox ID="CheckBox2" AutoPostBack="true" runat="server" />
       </HeaderTemplate>
      <ItemTemplate>
         <asp:CheckBox ID="CheckBox1"  AutoPostBack="true" runat="server" />
      </ItemTemplate>
     </telerik:GridTemplateColumn>
  </Columns>
</MasterTableView>

CS:

// code to select all rows on clicking the header CheckBox

protected void RadGrid1_PreRender(object sender, EventArgs e)
    {
        foreach (GridHeaderItem header in RadGrid1.MasterTableView.GetItems(GridItemType.Header))
        {
            CheckBox chkbx = (CheckBox)header["SelectCol"].Controls[0];
            if (chkbx.Checked)
            {
                foreach (GridDataItem item in RadGrid1.MasterTableView.Items)
                {
                    item.Selected = true;
                }
            }
        }
    }

CS:

//code to check all rows on clicking the linkbutton in the CommanditemTemplate.

protected void RadGrid1_ItemCommand(object source, GridCommandEventArgs e)
    {
        if (e.CommandName == "Check")
        {
            foreach (GridHeaderItem header in RadGrid1.MasterTableView.GetItems(GridItemType.Header))
            {
                CheckBox chkbx = (CheckBox)header["SelectCol"].Controls[0];
                chkbx.Checked = true;
            }
        }


    }

Thanks
Shinu.

[codispdp]

Shinu,

Thanks I have the check/uncheck all  function working now with a HeaderTemplate and ItemTemplate for the dataitems. I am using the RadGrid hierarchy model and the persistence of checked items and header item using ViewState. I have everything working except when a GridDataItem is uncheck in the detailsTable I am trying too access the GridHeaderItem checkbox for that GridDataItem to remove the UniqueID of the header Checkbox control to remove it from the ViewState. Is there a way to access the  details table gridheader from the sender object of the itemtemplate checkbox?

Thanks again

<telerik:RadGrid
ID="rgProjects"
runat="server"
Skin="WebBlue"
Width="95%"
CellPadding="1"
CellSpacing="0"
PageSize="100"
AllowPaging="True"
AllowSorting="True"
ShowStatusBar="true"
AllowMultiRowSelection="True"
AutoGenerateColumns="False">
<PagerStyle Mode="NumericPages"></PagerStyle>
<MasterTableView Width="100%" DataKeyNames="Profile_Num" AllowMultiColumnSorting="True" Name=ProjectProfile>
<Columns>
<telerik:GridTemplateColumn UniqueName="MasterTemplate" >
<HeaderTemplate>
<asp:CheckBox ID="headerChkbox" AutoPostBack="true" runat="server" OnCheckedChanged="ToggleSelectedState" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="cbChecked" Runat="server" AutoPostBack="True" OnCheckedChanged="CheckChanged" />
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridBoundColumn SortExpression="PROJECT_NUMBER" HeaderText="Project" HeaderButtonType="TextButton" DataField="PROJECT_NUMBER" />
<telerik:GridBoundColumn SortExpression="PROFILE_NUM" HeaderText="Profile" HeaderButtonType="TextButton" DataField="PROFILE_NUM" />
<telerik:GridBoundColumn SortExpression="LOGO" HeaderText="Logo" HeaderButtonType="TextButton" DataField="LOGO" />
<telerik:GridBoundColumn SortExpression="COORDINATOR_NAME" HeaderText="Coord" HeaderButtonType="TextButton" DataField="COORDINATOR_NAME" />
<telerik:GridBoundColumn SortExpression="DESCRIPTION" HeaderText="Profile Description" HeaderButtonType="TextButton" DataField="DESCRIPTION" />
<telerik:GridBoundColumn SortExpression="REGION_DESC" HeaderText="Region" HeaderButtonType="TextButton" DataField="REGION_DESC" />
<telerik:GridBoundColumn SortExpression="CREATOR" HeaderText="Created By" HeaderButtonType="TextButton" DataField="CREATOR" />
</Columns>

<DetailTables>
<telerik:GridTableView DataKeyNames="TASK_NUMBER" Name="Tasks" Width="100%">
<Columns>
<telerik:GridTemplateColumn UniqueName="ChildTemplate" >
<HeaderTemplate>
<asp:CheckBox ID="headerChkbox" AutoPostBack="true" runat="server" OnCheckedChanged="ToggleSelectedState" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox id="cbChecked" Runat="server" AutoPostBack="True" OnCheckedChanged="CheckChanged" />
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridBoundColumn DataField="TASK_DESCRIPTION_B" HeaderText="Task Description" HeaderButtonType="TextButton" />
<telerik:GridBoundColumn DataField="GROUP_ASSIGNED" HeaderText="Grp" HeaderButtonType="TextButton" />
<telerik:GridBoundColumn DataField="COMPLETED_FLAG" HeaderText="Cmp" HeaderButtonType="TextButton" />
<telerik:GridBoundColumn DataField="USER_COMPLETED" HeaderText="User Completed" HeaderButtonType="TextButton" />
<telerik:GridBoundColumn DataField="DATE_COMPLETED" HeaderText="Date Completed" HeaderButtonType="TextButton" />
<telerik:GridBoundColumn DataField="ACTIVE_FLAG" HeaderText="Act" HeaderButtonType="TextButton" />
<telerik:GridBoundColumn DataField="DATE_ACTIVATED" HeaderText="Date Activated" HeaderButtonType="TextButton" />
<telerik:GridBoundColumn DataField="TASK_NUMBER" HeaderText="Task#" HeaderButtonType="TextButton" />
<telerik:GridBoundColumn DataField="DATE_CREATED" HeaderText="Date Created" HeaderButtonType="TextButton" />
</Columns>
</telerik:GridTableView>
</DetailTables>
</MasterTableView>
</telerik:RadGrid>

	Private ReadOnly Property ProfilesChecked() As Hashtable
	Get
	Dim res As Object = ViewState("_pc")
	If (res Is Nothing) Then
	res = New Hashtable
	ViewState("_pc") = res
	End If
	Return CType(res, Hashtable)
	End Get
	End Property
	Private ReadOnly Property TasksChecked() As Hashtable
	Get
	Dim res As Object = ViewState("_tc")
	If (res Is Nothing) Then
	res = New Hashtable
	ViewState("_tc") = res
	End If
	Return CType(res, Hashtable)
	End Get
	End Property
	Private ReadOnly Property TasksHeaderChecked() As Hashtable
	Get
	Dim res As Object = ViewState("_thc")
	If (res Is Nothing) Then
	res = New Hashtable
	ViewState("_thc") = res
	End If
	Return CType(res, Hashtable)
	End Get
	End Property
	Protected Sub CheckChanged(ByVal sender As Object, ByVal e As System.EventArgs)
	Dim sDataKey As String = Nothing
	Dim target As Hashtable = Nothing
	Dim sTemplate As String = Nothing
	Dim box As CheckBox = CType(sender, CheckBox)
	Dim item As GridDataItem = CType(box.NamingContainer, GridDataItem)
	Dim hitem As GridHeaderItem = CType(item.NamingContainer, GridHeaderItem)
	Select Case item.OwnerTableView.Name
	Case "ProjectProfile"
	sTemplate = "MasterTemplate"
	target = ProfilesChecked
	sDataKey = "Profile_Num"
	Case "Tasks"
	sTemplate = "ChildTemplate"
	target = TasksChecked
	sDataKey = "Task_Number"
	End Select
	If box.Checked Then
	target(item(sDataKey).Text) = True
	item.Selected = True
	Else
	target.Remove(item(sDataKey).Text)
	item.Selected = False
	'TasksHeaderChecked.Clear()
	End If
	End Sub
	Protected Sub ToggleSelectedState(ByVal sender As Object, ByVal e As EventArgs)
	Dim sTemplate As String = Nothing
	Dim sDataKey As String = Nothing
	Dim target As Hashtable = Nothing
	Dim box As CheckBox = DirectCast(sender, CheckBox)
	Dim hItem As GridHeaderItem = DirectCast(box.NamingContainer, GridHeaderItem)
	Select Case hItem.OwnerTableView.Name
	Case "ProjectProfile"
	sTemplate = "MasterTemplate"
	sDataKey = "Profile_Num"
	target = ProfilesChecked
	Case "Tasks"
	sTemplate = "ChildTemplate"
	sDataKey = "Task_Number"
	target = TasksChecked
	If box.Checked Then
	TasksHeaderChecked(CType(hItem("ChildTemplate").FindControl("headerChkbox"), CheckBox).UniqueID) = True
	Else
	TasksHeaderChecked.Remove(CType(hItem("ChildTemplate").FindControl("headerChkbox"), CheckBox).UniqueID)
	End If
	End Select
	For Each Item As GridDataItem In hItem.OwnerTableView.Items
	Item.Selected = box.Checked
	TryCast(Item(sTemplate).Controls(1), CheckBox).Checked = box.Checked
	If box.Checked Then
	target(Item(sDataKey).Text) = True
	Else
	target.Remove(Item(sDataKey).Text)
	End If
	Next
	End Sub
	Private Sub rgProjects_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Handles rgProjects.ItemDataBound
	If TypeOf e.Item Is GridDataItem Then
	Dim item As GridDataItem = CType(e.Item, GridDataItem)
	Dim box As CheckBox = CType(item.FindControl("cbChecked"), CheckBox)
	Dim isChecked As Object = Nothing
	Select Case item.OwnerTableView.Name
	Case "ProjectProfile"
	isChecked = ProfilesChecked(item("Profile_Num").Text)
	Case "Tasks"
	isChecked = TasksChecked(item("Task_Number").Text)
	End Select
	If Not (isChecked Is Nothing) Then
	item.Selected = CType(isChecked, Boolean) = True
	box.Checked = CType(isChecked, Boolean) = True
	End If
	End If
	If (TypeOf e.Item Is GridHeaderItem) And e.Item.OwnerTableView.Name = "Tasks" Then
	Dim header As GridHeaderItem = CType(e.Item, GridHeaderItem)
	Dim chkbx As CheckBox = DirectCast(header("ChildTemplate").FindControl("headerChkbox"), CheckBox)
	chkbx.Checked = TasksHeaderChecked(chkbx.UniqueID)
	End If
	End Sub

[Shinu]

Hi,

Give a try with the following code snippet and see if it helps.

CS:

protected void cbChecked_CheckedChanged(object sender, EventArgs e)
    {
        CheckBox chkbx = (CheckBox)sender;
        GridDataItem childItem = (GridDataItem)chkbx.NamingContainer;
        GridTableView ChiltTable = (GridTableView)childItem.OwnerTableView;
        foreach(GridHeaderItem header in ChiltTable.GetItems(GridItemType.Header) )
        {
            CheckBox headChkBx = (CheckBox)header["ChildTemplate"].FindControl("headerChkbox");
            headChkBx.Checked = chkbx.Checked;
        }
    }

Thanks
Shinu.

[codispdp]

Shinu,

Perfect that did the trick.

Thanks    

Dan