[Solved] Access GridItems on different page (AllowPaging is enabled in grid)

[Cade]

Here is my my aspx page. I have paging set to true on the grid (which is working properly). I want to toggle the selected state of each of the checkboxes in the GridItems instead of just the GridItems on the current page.

Each GridItem has a chkInclude (its an ItemTemplate).

ASPX Code:

<asp:CheckBox ID="chkIncludeAll" runat="server" AutoPostBack="true" OnCheckedChanged="chkIncludeAll_OnCheckedChanged"

                    Text="Select/Deselect All" />

                <telerik:RadGrid ID="RadGrid1" AutoGenerateColumns="false" AllowPaging="True" AllowSorting="true"

                    Width="434px" Height="300px" BorderStyle="None" HorizontalAlign="Left" runat="server"

                    OnNeedDataSource="RadGrid1_NeedDataSource">

                    <ClientSettings Scrolling-AllowScroll="false">

                        <ClientEvents OnRowSelected="RadGrid1_RowSelected" />

                    </ClientSettings>

                    <MasterTableView ClientDataKeyNames="TimeZoneIndex,Roving" PageSize="15">

                        <Columns>

                            <telerik:GridTemplateColumn HeaderText="Include" HeaderTooltip="Include" UniqueName="Include">

                                <HeaderStyle Width="20px" />

                                <ItemTemplate>

                                    <asp:CheckBox ID="chkInclude" runat="server" />

                                </ItemTemplate>

                            </telerik:GridTemplateColumn>

                            <telerik:GridBoundColumn DataField="EmployeeId" UniqueName="EmployeeId" HeaderText="Id"

                                HeaderTooltip="Id">

                            </telerik:GridBoundColumn>

                            <telerik:GridBoundColumn DataField="LastName" UniqueName="LastName" HeaderText="Last Name"

                                HeaderTooltip="Last Name">

                            </telerik:GridBoundColumn>

                            <telerik:GridBoundColumn DataField="FirstName" UniqueName="FirstName" HeaderText="First Name"

                                HeaderTooltip="First Name">

                            </telerik:GridBoundColumn>

                        </Columns>

                    </MasterTableView>

                </telerik:RadGrid>

C# Code:

protected void chkIncludeAll_OnCheckedChanged(Object sender, EventArgs e)

        {

            CheckBox checkboxIncludeAll = sender as CheckBox;

            if (checkboxIncludeAll is CheckBox)

            {

                foreach (GridItem item in RadGrid1.Items)

                {

                    if (item.ItemType != GridItemType.Item && item.ItemType != GridItemType.AlternatingItem)

                    {

                        continue;

                    }

                    CheckBox checkboxIncludeSingle = item.FindControl("chkInclude") as CheckBox;

                    if (checkboxIncludeSingle is CheckBox)

                    {

                        checkboxIncludeSingle.Checked = checkboxIncludeAll.Checked;

                    }

                }

            }

        }

[Princy]

Hello Cade,

You can try out following code in the PreRender event of the grid so as to toggle selected state of checkbox across pages in the grid:
c#:

protected void RadGrid1_PreRender(object sender, EventArgs e)
    {
           foreach (GridItem item in RadGrid1.Items)
            {
                if (item.ItemType != GridItemType.Item && item.ItemType != GridItemType.AlternatingItem)
                {
                    continue;
                }

                CheckBox checkboxIncludeSingle = item.FindControl("chkInclude") as CheckBox;
                if (checkboxIncludeSingle is CheckBox)
                {
                    checkboxIncludeSingle.Checked = chkIncludeAll.Checked;
                }
            }
    }

Thanks
Princy.

[Cade]

Thanks Princy...Works like a charm.

[Cade]

Well...that worked for showing the items selected when the page loads but I actually need them selected on the previous/subsequent pages.

For example, when the user selects the chkIncludeAll checkbox, it should select all the items on all the pages. The second part of my problem is that I need to be able to determine the checked state of all the items in the grid. I might have 2000 items in the grid with only 10 items shown per page. If the user selects thte chkIncludeAll checkbox, i want to select all of the items on all of the pages because I am going to write the state of the items to the database when the user saves which items they have selected (there is a save button on the page).