Find control in LayoutTemplate

[Erik Kleinreesink]

Please telle me how I can find controls in the LayoutTemplate (see attached picture).
I need to set the text attributes for different languages.

[Sebastian]

Hi Erik,

Merely invoking the FindControl(labelId) method for the RadListView instance should be sufficient to locate the controls inside its layout template. This can be done inside the PageLoad handler of the page, for example:

C#
(RadListView1.FindControl("lblForum") as Label).Text = ....

VB.NET
CType(RadListView1.FindControl("lblForum"), Label).Text = .....

Best regards,
Sebastian
the Telerik team

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[Erik Kleinreesink]

Thank you for your answer.
When I tried it, it didn't work. But I found out it depends on the page event in wich you use this statement.
De control is not yet defined in the page_load event.
When I used it in the RadListView1_PreRender event it worked fine.

[slnavn2000]

Hi All, 

With this code, I could find control in LayoutTemplate,  

protected void RadListView1_PreRender(object sender, EventArgs e)

        {            

            Label lblTest= RadListView1.FindControl("lblTest") as Label;

            lblTest.Text = "Hello";

        }

but, when I using this to find control in EmptyDataTemplate, it return null, I don't know why?!!

Please give me some suggestion!

Thanks, 

slnavn2000

[Kiara]

Listen for the ItemCreated server event of the listview for this purpose. This code worked as expected on my end:

        <asp:ScriptManager ID="ScriptManager1" runat="server" />
        <telerik:RadListView ID="RadListView1" DataSourceID="SqlDataSource1" runat="server"
            ItemPlaceholderID="ProductItemContainer" Skin=""
            onitemcreated="RadListView1_ItemCreated">
            <LayoutTemplate>
                <fieldset id="ProductItemContainer" runat="server" />
            </LayoutTemplate>
            <ItemTemplate>
                <ul>
                    <li>
                        <label>
                            Product name:</label>
                        <%#Eval("ProductName")%>
                    </li>
                    <li>
                        <label>
                            Quantity per unit:</label>
                        <%#Eval("QuantityPerUnit")%>
                    </li>
                    <li>
                        <label>
                            Unit price:</label>
                        <%# DataBinder.Eval(Container.DataItem, "UnitPrice", "{0:C}")%>
                    </li>
                    <li>
                        <label>
                            Units in stock:</label>
                        <%#Eval("UnitsInStock")%>
                    </li>
                    <li>
                        <label>
                            Discontinued:</label>
                        <%#Eval("Discontinued")%>
                    </li>
                </ul>
            </ItemTemplate>
            <EmptyDataTemplate>
                <asp:Label ID="lblEmpty" runat="server" Text="No data" />
            </EmptyDataTemplate>
        </telerik:RadListView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
            ProviderName="System.Data.SqlClient" SelectCommand="SELECT TOP 3 ProductID, ProductName, QuantityPerUnit, UnitPrice, UnitsInStock, Discontinued FROM Products WHERE 1=0" />

    protected void RadListView1_ItemCreated(object sender, RadListViewItemEventArgs e)
    {
        if (e.Item is RadListViewEmptyDataItem)
        {
            Label lbl1 = e.Item.FindControl("lblEmpty") as Label;
            lbl1.Text = "No data available";
        }
    }

Kiara

[slnavn2000]

yeah, I can find control in ItemCreated event

thanks Kiara very much :)

[howard]

   <telerik:RadListView ID="RLVTEST" runat="server" RenderMode="Lightweight" ItemPlaceholderID="itemPlaceholder" AllowPaging="True" PageSize="5"
                    DataKeyNames="G,M,GID" ClientDataKeyNames="G,M,GID" OnItemCommand="RLVTEST_ItemCommand" BorderWidth="0px">
                    <LayoutTemplate>
                        <div class="RadListView RadListView_<%# Container.Skin %>" style="border-width: 0px; width: 100%;">
                            <fieldset id="FieldSet1" style="border-width: 0px; width: 100%;">
                                <asp:PlaceHolder ID="itemPlaceholder" runat="server"></asp:PlaceHolder>
                            </fieldset>
                        </div>
                    </LayoutTemplate>
                    <ItemTemplate>
                       
                    </ItemTemplate>
                    <EmptyDataTemplate>
                        <div >
                            <div class="rlvEmpty">
                                <asp:Label ID="LB_MSG" runat="server" Text="no data"></asp:Label>
                            </div>
                        </div>
                    </EmptyDataTemplate>
                </telerik:RadListView>

 

 

How can i  change Label:LB_MSG text from EmptyDataTemplate  Code Behind???

 

[Vessy]

Hi howard,

Using the approach suggested by Kiara will allow you to change the text of the label as follows:

<telerik:RadListView ID="RLVTEST" runat="server" RenderMode="Lightweight"
    ItemPlaceholderID="itemPlaceholder" AllowPaging="True" PageSize="5"
    DataKeyNames="G,M,GID" ClientDataKeyNames="G,M,GID"
    OnItemCommand="RLVTEST_ItemCommand" BorderWidth="0px"
    OnItemCreated="RadListView1_ItemCreated">
    <LayoutTemplate>
        <div class="RadListView RadListView_<%# Container.Skin %>" style="border-width: 0px; width: 100%;">
            <fieldset id="FieldSet1" style="border-width: 0px; width: 100%;">
                <asp:PlaceHolder ID="itemPlaceholder" runat="server"></asp:PlaceHolder>
            </fieldset>
        </div>
    </LayoutTemplate>
    <ItemTemplate>
    </ItemTemplate>
    <EmptyDataTemplate>
        <div>
            <div class="rlvEmpty">
                <asp:Label ID="LB_MSG" runat="server" Text="no data"></asp:Label>
            </div>
        </div>
    </EmptyDataTemplate>
</telerik:RadListView>

protected void RadListView1_ItemCreated(object sender, RadListViewItemEventArgs e)
{
    var type = e.Item.GetType().FullName;

    if (e.Item is RadListViewEmptyDataItem)
    {
        Label lbl1 = e.Item.FindControl("LB_MSG") as Label;
        lbl1.Text = "No data available";
    }
}

Regards,
Vessy
Progress Telerik

[howard]

Oh my goodness, it's Work!!!!!!!!  I truly appreciate your help!!!

[Vessy]

Hi,

You are welcome, howard - I am glad my reply helped you to achieve your goal :)

Regards,
Vessy
Progress Telerik