[Solved] CommandItemTemplate

[Srinath]

I have a linkbutton in CommandItemTemplate of RadGrid. I need to disable it in

ItemDataBound of Radgrid

 in code behind. Could you pls let me know how can i do that.


--Srinath

[Princy]

Hello Srinath,

Check out the following code snippet.

CS:

 protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
    {

        if (e.Item is GridCommandItem)
        {
            GridCommandItem item = (GridCommandItem)e.Item;
            LinkButton lnkbtn = (LinkButton)item.FindControl("LinkButton1");
            lnkbtn.Enabled = false;
        }
    }

Thanks
Princy.

[Srinath]

I have the linkButton in

<MasterTableView>

       <<DetailTables>>
               
                  <detailtables>
                                   <CommandItemTemplate>
                            <asp:LinkButton ID="LinkButton1" runat="server"               CommandName="InitInsert" Enabled="false" CssClass="new">Add New Course</asp:LinkButton>
                        </CommandItemTemplate>

My Grids structure is defined as above. Pls suggest .

--Srinath

[Shinu]

Hi Srinath,

Set the Name property for the Detail Table and try accessing the linkButton in the CommandItemTemplate as shown below.

ASPX:

 <DetailTables>
       <telerik:GridTableView runat="server" DataSourceID="SqlDataSource1" Name="Detail2"  CommandItemDisplay="top"  >
       <CommandItemTemplate>
           <asp:LinkButton ID="LinkButton2" Text="Click"  runat="server"></asp:LinkButton>
       </CommandItemTemplate>

CS:

protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
    {
        if ((e.Item is GridCommandItem) && (e.Item.OwnerTableView.Name == "Detail2"))
        {
            GridCommandItem cmdItem = (GridCommandItem)e.Item;
            LinkButton lnkbtn = (LinkButton)cmdItem.FindControl("LinkButton2");
            lnkbtn.ForeColor = System.Drawing.Color.Red;
        }


   }

Hope this helps..
Shinu.

[Srinath]

Unable to cast object of type 'Telerik.Web.UI.GridDataItem' to type 'Telerik.Web.UI.GridCommandItem'.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidCastException: Unable to cast object of type 'Telerik.Web.UI.GridDataItem' to type 'Telerik.Web.UI.GridCommandItem'.

Source Error:

Line 355: { Line 356: Line 357: GridCommandItem cmdItem = (GridCommandItem)e.Item; Line 358: LinkButton lnkbtn = (LinkButton)cmdItem.FindControl("LinkButton1"); Line 359: lnkbtn.ForeColor = System.Drawing.Color.Red;

Source File: \admin\Edit.ascx.cs    Line: 357


It is throwing the above error.

Even I have RadGrid_DetailTableDataBind Event

Can I access from there? Pls suggest.

[Shinu]

Hi Srinath,

Are you checking the above given code in the ItemdataBound event? Have you set the ItemDataBound Event handler in the aspx?

Shinu.

[Srinath]

No It is in my Ascx only. Rest of the code is working fine. I just need to access that Linkbutton and set that to Invisible based on a condition.

Thanks,
--Srinath

[Shinu]

Hi Srinath,

Sending your ASPX/ASCX will be more good.

Shinu.

[Srinath]

<PortalControls:GridControl
        ID="CurriculumGrid"
        runat="server"
        EnableEmbeddedSkins="false"
        Skin="Default"
        PageSize="20"
        AutoGenerateColumns="False"
        AllowSorting="false"
        AllowMultiRowSelection="False"
        ShowStatusBar="false"
        AllowPaging="True"
        OnDetailTableDataBind="CurriculumGrid_DetailTableDataBind"
        OnNeedDataSource="CurriculumGrid_NeedDataSource"
        GridLines="None"
        OnItemDataBound="CurriculumGrid_ItemDataBound"
        AllowAutomaticInserts="false"
        AllowAutomaticUpdates="false"
        AllowAutomaticDeletes="false"
        OnItemCommand="CurriculumGrid_ItemCommand"
        OnCancelCommand="CurriculumGrid_CancelCommand"
        OnEditCommand="CurriculumGrid_EditCommand"
        OnInsertCommand="CurriculumGrid_InsertCommand"
        OnDeleteCommand="CurriculumGrid_DeleteCommand"
        OnItemDeleted="CurriculumGrid_ItemDeleted"
        OnItemInserted="CurriculumGrid_ItemInserted"
        OnItemUpdated="CurriculumGrid_ItemUpdated"
        OnUpdateCommand="CurriculumGrid_UpdateCommand">
       
        <PagerStyle Mode="NumericPages"></PagerStyle>
        <MasterTableView DataKeyNames="ClassificationID" AllowMultiColumnSorting="false" Width="100%"
            CommandItemDisplay="Top" Name="Classification">
            <CommandItemTemplate>
                <asp:LinkButton ID="AddNew" runat="server" CommandName="InitInsert" CssClass="new">Add New Classification</asp:LinkButton>
            </CommandItemTemplate>
            <NoRecordsTemplate>
                <p>
                    <asp:Label runat="server" ID="Label1">No Classifications</asp:Label></p>
            </NoRecordsTemplate>
            <DetailTables>
                <telerik:GridTableView DataKeyNames="CourseGroupID" Name="Curriculum" Width="100%" AllowPaging="false"
                    CommandItemDisplay="Top" runat="server">
                    <parenttablerelation>
                         <telerik:GridRelationFields DetailKeyField="ClassificationID" MasterKeyField="ClassificationID" />
                    </parenttablerelation>
                    <commanditemtemplate>
                        <asp:LinkButton ID="AddNew" runat="server" CommandName="InitInsert" CssClass="new">Add New Curricula</asp:LinkButton>
                    </commanditemtemplate>
                    <norecordstemplate>
                    <p><asp:Label runat="server" ID="Label1">No Curricula has been assiged to this Classification</asp:Label></p>
                </norecordstemplate>
                    <detailtables>
                    <telerik:GridTableView  DataKeyNames="CourseGroupProductGroupID,ProductGroupID" Name="Courses" Width="100%"
                        AllowPaging="false"  CommandItemDisplay="Top"  runat="server">
                        <CommandItemTemplate>
                            <asp:LinkButton ID="LinkButton1" runat="server" CommandName="InitInsert" Enabled="false" CssClass="new">Add New Course</asp:LinkButton>
                        </CommandItemTemplate>
                        <ParentTableRelation>
                            <telerik:GridRelationFields DetailKeyField="CourseGroupID" MasterKeyField="CourseGroupID" />
                        </ParentTableRelation>
                        <NoRecordsTemplate>
                            <p><asp:Label runat="server" ID="Label2">No Courses have been assigned to this curricula.</asp:Label></p>
                        </NoRecordsTemplate>        
                        <Columns>
                            <telerik:GridBoundColumn UniqueName="CybCourseCode" SortExpression="CybCourseCode" HeaderText="Code" DataField="CybCourseCode" />
                            <telerik:GridBoundColumn UniqueName="Title" SortExpression="Title" HeaderText="Course Title" DataField="Title" />           
                            <telerik:GridBoundColumn UniqueName="ProductGroupDisplayOrder" visible="true" SortExpression="DisplayOrder" HeaderText="Order" DataField="DisplayOrder" />
                            <telerik:GridBoundColumn UniqueName="ProductGroupID" SortExpression="ProductGroupID" HeaderText="Code" DataField="ProductGroupID" visible="false" />
                           
                            <telerik:GridTemplateColumn UniqueName="OtherOptions">
                                <ItemTemplate>
                                    <div>
                                        <label title="Check box if course should be assigned to students who are assigned this curriculum."><asp:Checkbox ID="AssignWithCourseGroup" runat="server" AutoPostBack="true" OnCheckedChanged="AssignWithCourseGroup_CheckedChanged" Text="Assign W/ Curriculum" Visible="true" ></asp:Checkbox></label><br />
                                        <asp:Checkbox ID="IncludeOnReports" runat="server" AutoPostBack="true" OnCheckedChanged="IncludeOnReports_CheckedChanged" Text="Include in Reports" Visible="true"></asp:Checkbox><br />
                                        <asp:Checkbox ID="DisplayOnMyCourses" runat="server" AutoPostBack="true" OnCheckedChanged="DisplayOnMyCourses_CheckedChanged" Text="Display on My Courses" Visible="true"></asp:Checkbox>
                                    </div>
                                </ItemTemplate>
                            </telerik:GridTemplateColumn>
                           
                            <telerik:GridTemplateColumn UniqueName="CourseActionColumn">
                                <ItemTemplate>
                                    <div>
                                        <asp:LinkButton ID="lbCourseMoveUp" runat="server" CssClass="moveUp" CommandName="Up" Text="Move Up" Visible="true"></asp:LinkButton>
                                        <asp:LinkButton ID="lbCourseDelete" runat="server" Enabled="true" CssClass="delete" CommandName="Delete" Text="Delete" Visible="true" ></asp:LinkButton>
                                        <asp:LinkButton ID="lbCourseMoveDown" runat="server" CssClass="moveDown" CommandName="Down" Text="Move Down" Visible="true"></asp:LinkButton>
                                    </div>
                                </ItemTemplate>
                            </telerik:GridTemplateColumn>
                        </Columns>
                        <EditFormSettings editformtype="Template">
                            <EditColumn uniquename="Title"></EditColumn>
                            <FormTemplate>
                                <asp:Label id="lbCourse" runat="server" Text='Select Course to add:' Font-Bold="true" /><br />
                                <asp:dropdownlist ID="ddProductList" runat="server" Width="500px" DataTextField="Title" DataValueField="ProductGroupID" DataSource="<%# ddProductList_DataSource() %>"></asp:dropdownlist>
                                <label title="Check box if course should be assigned to students who are assigned this curriculum."><asp:Label id="lblAssign" runat="server" Text='Assign w/ Curriculum:' Font-Bold="true" /></label>
                                <asp:Checkbox ID="chkAssignWithCourseGroup" runat="server" /><br />
                                <asp:Label id="lblReports" runat="server" Text='Include On Reports:' Font-Bold="true" />
                                <asp:Checkbox ID="chkIncludeOnReports" runat="server" /><br />
                                <asp:Label id="lblMyCourses" runat="server" Text='Display On My Courses:' Font-Bold="true" />
                                <asp:Checkbox ID="chkDisplayOnMyCourses" runat="server" /><br />
                                <asp:Label id="lbCourseMessage" runat="server" Text="" ForeColor="Red" /><br />
                                <asp:Button ID="btnUpdate1" Text='<%# (Container as GridItem).OwnerTableView.IsItemInserted ? "Insert" : "Update" %>'
                                     runat="server" CommandName='<%# (Container as GridItem).OwnerTableView.IsItemInserted ? "PerformInsert" : "Update" %>'>
                                </asp:Button>&nbsp;
                                <asp:Button ID="btnCancel1" Text="Cancel" runat="server" CausesValidation="False"
                                        CommandName="Cancel"></asp:Button>
                            </FormTemplate>
                        </EditFormSettings>
                        <SortExpressions>
                            <telerik:GridSortExpression FieldName="DisplayOrder" SortOrder="Ascending"></telerik:GridSortExpression>
                        </SortExpressions>
                     </telerik:GridTableView>
                </detailtables>
                    <columns>
                    <telerik:GridBoundColumn UniqueName="CurriculumName" SortExpression="CurriculumName" HeaderStyle-HorizontalAlign="Left" HeaderText="Curriculum Name" DataField="CurriculumName" />
                    <telerik:GridBoundColumn UniqueName="CurriculumDisplayOrder" visible="true" SortExpression="DisplayOrder" HeaderText="Order" DataField="DisplayOrder" />
                    <telerik:GridBoundColumn UniqueName="CourseGroupID" SortExpression="CourseGroupID" HeaderText="Code" DataField="CourseGroupID" visible="false" />
                    <telerik:GridTemplateColumn UniqueName="CurriculumActionColumn">
                        <ItemTemplate>
                            <div>
                                <asp:LinkButton ID="lbCurriculumMoveUp" runat="server" CssClass="moveUp" CommandName="Up" Text="Move Up" Visible="true"></asp:LinkButton>
                                <asp:LinkButton ID="lbCurriculumEdit" runat="server" CssClass="edit" CommandName="Edit" Text="Edit" Visible="true"></asp:LinkButton>
                                <asp:LinkButton ID="lbCurriculumDelete" runat="server" CssClass="delete" CommandName="Delete" Text="Delete" Visible="true"  ></asp:LinkButton>
                                <asp:LinkButton ID="lbCurriculumMoveDown" runat="server" CssClass="moveDown" CommandName="Down" Text="Move Down" Visible="true"></asp:LinkButton>
                            </div>
                        </ItemTemplate>
                    </telerik:GridTemplateColumn>
                </columns>
                    <editformsettings editformtype="Template">
                    <EditColumn uniquename="CurriculumName"></EditColumn>
                    <FormTemplate>
                        <asp:panel id="pnlddCurriculum" runat="server" >
                        <asp:Label id="lbCurriculum" runat="server" Text='Select Curriculum to add:' Font-Bold="true" /><br />
                        <asp:dropdownlist ID="ddCourseGroupID" runat="server" DataTextField="Name" DataValueField="CourseGroupID" DataSource="<%# ddCourseList_DataSource() %>"></asp:dropdownlist>
                        <asp:Label id="lbOR" runat="server" Text='<br /><br />- OR -<br /><br />' Font-Bold="true" />
                        </asp:panel>
                        <asp:Label id="lbCurriculum2" runat="server" Text='<%# (Container as GridItem).OwnerTableView.IsItemInserted ? "Type in a new curriculum name:" : "Curriculum Name:" %>' Font-Bold="true" /><br />
                        <asp:TextBox ID="txtCurriculum" runat="server" Text='<%# Bind( "CurriculumName" ) %>' MaxLength="250" Width="400px" />
                        <%--<asp:CustomValidator ID="cvCurriculum" runat="server" ErrorMessage="Invalid input" ControlToValidate="txtCurriculum" OnServerValidate="CustomValidator1_ServerValidate"></asp:CustomValidator>--%>
                        <asp:Label id="lblMessage" runat="server" Text="" ForeColor="Red" /><br />
                        <asp:panel id="pnlAllowCurriculum" runat="server">
                        <asp:Label id="lblConfirmation" runat="server" Text='Allow Curricula to be Assigned to Students:' Font-Bold="true" />
                        <asp:radiobutton GroupName="confirmation" ID="rbYes" Text="Yes" Checked="true" runat="server" /> &nbsp;
                        <asp:radiobutton GroupName="confirmation" ID="rbNo" Text="No" runat="server" />
                        <asp:Label ID="lblAllowAssignToStudents" Text='<%# Bind( "AllowAssignToStudents" ) %>' Visible="false" runat="server" /> &nbsp;
                        <br />
                        </asp:panel>
                        <asp:Button ID="btnUpdate" Text='<%# (Container as GridItem).OwnerTableView.IsItemInserted ? "Insert" : "Update" %>'
                        runat="server" CommandName='<%# (Container as GridItem).OwnerTableView.IsItemInserted ? "PerformInsert" : "Update" %>'>
                        </asp:Button>&nbsp;
                        <asp:Button ID="btnCancel" Text="Cancel" runat="server" CausesValidation="False" CommandName="Cancel"></asp:Button>
                        <%--<asp:Label id="lblMessage" Visible="false" runat="server" Text='Please enter a value or select from a value from list' ForeColor="red" Font-Bold="true" /><br />--%>
                    </FormTemplate>
                </editformsettings>
                    <sortexpressions>
                    <telerik:GridSortExpression FieldName="DisplayOrder"></telerik:GridSortExpression>
                </sortexpressions>
                </telerik:GridTableView>
            </DetailTables>
            <Columns>
                <telerik:GridBoundColumn UniqueName="Classification" SortExpression="ClassificationName"
                    HeaderText="Classification Name" DataField="ClassificationName" />
                <telerik:GridBoundColumn UniqueName="ClassificationDisplayOrder" visible="true" SortExpression="DisplayOrder"
                    HeaderText="Order" DataField="DisplayOrder" />
                <telerik:GridBoundColumn UniqueName="ClassificationID" visible="false" SortExpression="ClassificationID"
                    HeaderText="Code" DataField="ClassificationID" />
                <telerik:GridTemplateColumn UniqueName="ClassificationActionColumn">
                    <itemtemplate>
                    <div>
                        <asp:LinkButton ID="lbMoveUp" runat="server" CssClass="moveUp" CommandName="Up" Text="Move Up" Visible="true"></asp:LinkButton>
                        <asp:LinkButton ID="lbClassificationEdit" runat="server" CssClass="edit" CommandName="Edit" Text="Edit" Visible="true"></asp:LinkButton>
                        <asp:LinkButton ID="lbClassificationDelete" runat="server" CssClass="delete" CommandName="Delete" Text="Delete" Visible="true"></asp:LinkButton>
                        <asp:LinkButton ID="lbMoveDown" runat="server" CssClass="moveDown" CommandName="Down" Text="Move Down" Visible="true"></asp:LinkButton>
                    </div>
                </itemtemplate>
                </telerik:GridTemplateColumn>
            </Columns>
            <EditFormSettings EditFormType="Template">
                <EditColumn UniqueName="Classification">
                </EditColumn>
                <FormTemplate>
                    <asp:Label ID="lbClassification" runat="server" Text='<%# (Container as GridItem).OwnerTableView.IsItemInserted ? "Enter new classification name:" : "Classification Name:" %>'
                        Font-Bold="true" /><br />
                    <asp:TextBox ID="txtClassification" runat="server" Text='<%# Bind( "ClassificationName" ) %>'
                        MaxLength="500" Width="400px" />
                      <asp:Label id="lblClassificationMessage" runat="server" Text="" ForeColor="Red" />
                    <%--<asp:RequiredFieldValidator ID="valClassification" runat="server" ErrorMessage="<br>Please enter a classification name."
                        ControlToValidate="txtClassification" Display="Dynamic"></asp:RequiredFieldValidator>--%>
                    <asp:TextBox ID="txtClassificationID" runat="server" Text='<%# Bind( "ClassificationID" ) %>'
                        Visible="false" />
                    <br />
                    <asp:Button ID="btnUpdate2" Text='<%# (Container as GridItem).OwnerTableView.IsItemInserted ? "Insert" : "Update" %>'
                        runat="server" CommandName='<%# (Container as GridItem).OwnerTableView.IsItemInserted ? "PerformInsert" : "Update" %>'>
                    </asp:Button>&nbsp;
                    <asp:Button ID="btnCancel" Text="Cancel" runat="server" CausesValidation="False"
                        CommandName="Cancel"></asp:Button>
                </FormTemplate>
            </EditFormSettings>
            <SortExpressions>
                <telerik:GridSortExpression FieldName="DisplayOrder">
                </telerik:GridSortExpression>
            </SortExpressions>
            <PagerTemplate>
            </PagerTemplate>
        </MasterTableView>
        <PagerStyle Position="Bottom" />
    </PortalControls:GridControl>

============================================================ The above is the code for the RadGrid. And I Have to access the linkbutton with ID as  "LinkButton1" in any of the following Events,

CurriculumGrid_ItemDataBound
CurriculumGrid_DetailTableDataBind

Please let me know how to access that link in the above mentioned events.

Thanks,
--Srinath

[Shinu]

Hi,

Is your Grid in the ASCX page?

Shinu

[Srinath]

yes, It is in Ascx. This Grid is no where related to my Aspx. page.

Thanks,
--Srinath

[Princy]

Hi Srinath,

Have you set the proper NameSpace at the top of the ascx.cs Page? Try setting it as shown below.

ascx.cs:

using Telerik.Web.UI;

Thanks
Princy.

[Srinath]

Yes Princy,

I am using that. My code in ascx.cs is working fine with out errors, All the events are firing with out any road blocks.. I just need to access the below mentioned link in one of the below mentioned events. Its bit urgent Princy. Could pls help me out.

Thanks,
--Srinath

[Shinu]

Hi Srinath,

I tried this on my end and it is working as expected. Here is the code:

ASCX:

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControl.ascx.cs" Inherits="WebUserControl" %>
<%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
    Namespace="System.Web.UI" TagPrefix="asp" %>
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
<br />
<br />
<br />
<asp:ScriptManager id="ScriptManager1" runat="server">
</asp:ScriptManager><br />
<br />
<br />
<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1"
    GridLines="None" OnItemDataBound="RadGrid1_ItemDataBound" OnNeedDataSource="RadGrid1_NeedDataSource">
    <MasterTableView DataKeyNames="ProductID" DataSourceID="SqlDataSource1">
        <RowIndicatorColumn Visible="False">
            <HeaderStyle Width="20px" />
        </RowIndicatorColumn>
        <ExpandCollapseColumn Resizable="False" Visible="False">
            <HeaderStyle Width="20px" />
        </ExpandCollapseColumn>
        <Columns>
            <telerik:GridBoundColumn DataField="ProductName" HeaderText="ProductName" SortExpression="ProductName"
                UniqueName="ProductName">
            </telerik:GridBoundColumn>
            <telerik:GridBoundColumn DataField="ProductID" DataType="System.Int32" HeaderText="ProductID"
                ReadOnly="True" SortExpression="ProductID" UniqueName="ProductID">
            </telerik:GridBoundColumn>
            <telerik:GridBoundColumn DataField="SupplierID" DataType="System.Int32" HeaderText="SupplierID"
                SortExpression="SupplierID" UniqueName="SupplierID">
            </telerik:GridBoundColumn>
        </Columns>
          <DetailTables>
            <telerik:GridTableView runat="server" DataSourceID="SqlDataSource1" >
             <Columns>
             <telerik:GridBoundColumn DataField="ProductName"   UniqueName="ProductName" HeaderText="ProductName" SortExpression="ProductName" ></telerik:GridBoundColumn>

             </Columns>

              <DetailTables>
                <telerik:GridTableView runat="server" DataSourceID="SqlDataSource1" Name="Detail2" CommandItemDisplay="top"  >
                 <CommandItemTemplate>
                     <asp:LinkButton ID="LinkButton1" runat="server">LinkButton</asp:LinkButton>
                 </CommandItemTemplate>
                 <Columns>
                  <telerik:GridBoundColumn DataField="ProductName" HeaderText="ProductName"  UniqueName="ProductName" SortExpression="ProductName" ></telerik:GridBoundColumn>

                 </Columns>
                </telerik:GridTableView>
              </DetailTables>
            </telerik:GridTableView>
          </DetailTables>
        <EditFormSettings>
            <PopUpSettings ScrollBars="None" />
        </EditFormSettings>
    </MasterTableView>
</telerik:RadGrid>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
    SelectCommand="SELECT [ProductName], [ProductID], [SupplierID] FROM [Products]">
</asp:SqlDataSource>

ASCX.CS:

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Telerik.Web.UI;

public partial class WebUserControl : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void RadGrid1_ItemDataBound(object sender, Telerik.Web.UI.GridItemEventArgs e)
    {
        if ((e.Item is GridCommandItem) && (e.Item.OwnerTableView.Name == "Detail2"))
        {

            GridCommandItem cmditem = (GridCommandItem)e.Item;
            LinkButton lnkbtn = (LinkButton)cmditem.FindControl("LinkButton1");
            lnkbtn.Enabled = false;

        }
    }

}

Thanks
Shinu.

[Srinath]

Thanks Dude.. :) It is working now.

--Srinath

[Shinu]

Hi Srinath,

You can also go through the following help document link.
Traversing detail tables/items in Telerik RadGrid

Shinu.