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Panelbar inside a ListView

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PanelBar

This is a migrated thread and some comments may be shown as answers.

Raventhorn asked on 28 May 2012, 10:30 PM

I have a DataListView that contains a panelbar and the panelbar contains a textbox and button. I have the ListView bound to a SQL Datasource and the panelbar is not bound to anything. Inside the panel bar I need to set values to these controls using the Eval() command. However, it is returning null. If I move the textbox and button outside of the panelbar they can grab the data no problem. Once inside it's null. I know it's because they're looking for the datasource of the panelbar... is there anyway to override this? I want the textbox and button to get their values from the datasource of the listview.

<telerik:RadListView ID="wall" runat="server" Skin="Metro" AllowPaging="True" PageSize="200"

DataSourceID="WallSource">

<ItemTemplate>

<div class="wallPostPicture">

<telerik:RadBinaryImage ID="imgPosterPic" runat="server" DataValue='<%# Eval("Image") %>'

Height="50px" Width="50px" AutoAdjustImageControlSize="false" CssClass="friend" />

<telerik:RadToolTip ID="WallTip" runat="server" Position="MiddleRight" RelativeTo="Element"

Skin="Metro" TargetControlID="imgPosterPic" ShowEvent="OnMouseOver" HideEvent="LeaveTargetAndToolTip"

Animation="Resize" AutoCloseDelay="0" Title='<%# string.Format("{0} {1}", Eval("FirstName").ToString(), Eval("LastName").ToString())%>'>

<div>

<asp:Label ID="lblStatus" runat="server" Text='<%# Eval("Status") %>' /></div>

</div>

</telerik:RadToolTip>

</div>

<div style="float: right; padding-top: 10px;">

<asp:Label ID="lblCounter" runat="server" Text="0" CssClass="CounterText" ForeColor="LightGray" />

</div>

<div class="wallPostTitle">

<%# string.Format("{0} {1}", Eval("FirstName").ToString(), Eval("LastName").ToString())%></div>

<div class="wallPostDate">

<%# Eval("Date").ToString().ToLower() %></div>

<div class="wallPostDate" style="text-decoration: 'underline'">

<asp:LinkButton ID="lbtnRepost" runat="server" Text="repost" /> <b>·</b> <asp:LinkButton

ID="LinkButton1" runat="server" Text="upvote" /></div>

<div class="wallPostValue">

<%# Eval("Value") %></div>

<div class="wallPostComments">

<telerik:RadPanelBar runat="server" ID="RadPanelBar1" ExpandMode="SingleExpandedItem"

AllowCollapseAllItems="true" Skin="Metro" Width="100%" PersistStateInCookie="true">

<Items>

<telerik:RadPanelItem Text='comments' Expanded="False" runat="server">

<ContentTemplate>

<telerik:RadListView runat="server" ID="listComments" Skin="Metro" AllowPaging="true"

PageSize="15" DataSourceID="commentSource">

<ItemTemplate>

<div class="commentBlock">

<div class="wallPostPicture">

<telerik:RadBinaryImage ID="imgPosterPic" runat="server" DataValue='<%# Eval("Image") %>'

Height="40px" Width="40px" AutoAdjustImageControlSize="false" CssClass="friend" />

</div>

<div class="wallPostTitle">

<%# string.Format("{0} {1}", Eval("FirstName").ToString(), Eval("LastName").ToString())%>

</div>

<div class="wallPostDate">

<%# Eval("Date").ToString() %>

</div>

<div class="wallPostValue">

<%# Eval("Value") %>

</div>

</ItemTemplate>

</telerik:RadListView>

<span style="float: right; padding: 0px 10px 0px 0px;">

<asp:Button ID="btnPostComment" runat="server" CssClass="blueButton" Text="post" CommandArgument='<%# Eval("PostId") %>' OnCommand="btnPostComment_Click" /></span>

<div class="boxStatusmng" style="margin: 5px 0px 10px 0px; padding-left: 10px;">

<span class="bannerStatusMngInput">

<asp:TextBox ID="txtCommentIt" runat="server" CssClass="statusbox" Height="35px" Text='<%# Eval("PostId") %>' /></span>

<asp:HiddenField runat="server" ID="hideWallId" Value='<%# Eval("PostId") %>' />

<ajaxToolkit:TextBoxWatermarkExtender ID="wmComment" runat="server" TargetControlID="txtCommentIt"

WatermarkCssClass="statusboxwm" WatermarkText="say something..." />

</div>

</ContentTemplate>

</telerik:RadPanelItem>

</Items>

</telerik:RadPanelBar>

</div>

<asp:SqlDataSource runat="server" ID="commentSource" ConnectionString="<%$ ConnectionStrings:MySqlConnection %>"

SelectCommand='<%# string.Format("SELECT * FROM Comments, UserDetails WHERE PostTargetId = {0} AND UserDetails.UserId = Comments.PosterUserId",  Eval("PostId")) %>' />

</ItemTemplate>

</telerik:RadListView>

<asp:SqlDataSource ID="WallSource" runat="server" ConnectionString="<%$ ConnectionStrings:MySqlConnection %>"

SelectCommand="SELECT FirstName, LastName, Status, Image, Poster, Value, Date, WallUserId, PostId FROM UserDetails, Wall WHERE Wall.WallUserId = @WallUserId AND UserDetails.UserId = Wall.Poster ORDER BY Wall.Date DESC">

<SelectParameters>

<asp:ControlParameter ControlID="hideme" Name="WallUserId" PropertyName="Value" Type="String" />

</SelectParameters>

</asp:SqlDataSource>

<asp:HiddenField ID="hideme" runat="server" />

1 Answer, 1 is accepted

answered on 31 May 2012, 02:10 PM

PopulatePanelBarControlsInListView.zip

Hello Shannon,

Your assumption is correct - you cannot bind controls inside RadPanelBar because the latter is a naming container and it also has to be data-binded.

If the nested RadPanelBar is declaratively defined in ItemTemplate of RadListView, then you can use the following workaround - handle ItemDataBound of RadListView to find the controls inside RadPanelBar and populate their properties using the DataItem property of the listview item. Here is an example:

<telerik:RadListView ID="wall" runat="server" Skin="Metro" OnItemDataBound="wall_ItemDataBound">

<ItemTemplate>

<div class="wallPostValue">

<%# Eval("Value") %></div>

<telerik:RadPanelBar ID="RadPanelBar1" runat="server">

<Items>

<telerik:RadPanelItem runat="server" Text="Text">

<ContentTemplate>

Text:

<asp:literal id="LiteralText" runat="server"></asp:literal>

</ContentTemplate>

</telerik:RadPanelItem>

<telerik:RadPanelItem runat="server" Text="Value">

<ContentTemplate>

Value:

<asp:literal id="LiteralValue" runat="server"></asp:literal>

</ContentTemplate>

</telerik:RadPanelItem>

</Items>

</telerik:RadPanelBar>

</ItemTemplate>

</telerik:RadListView>

private DataTable CreateTestTable()

{

DataTable table = new DataTable();

table.Columns.Add("ID");

table.Columns.Add("Text");

table.Columns.Add("Value");

table.Rows.Add(new string[] { "1", "1", "A"});

table.Rows.Add(new string[] { "2", "2", "B"});

table.Rows.Add(new string[] { "3", "3", "C"});

table.Rows.Add(new string[] { "4", "4", "D"});

return table;

}

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

wall.DataSource = CreateTestTable();

wall.DataBind();

}

protected void wall_ItemDataBound(object sender, Telerik.Web.UI.RadListViewItemEventArgs e)

{

RadListViewDataItem currentItem = e.Item as RadListViewDataItem;

DataRowView row = (DataRowView)currentItem.DataItem;

RadPanelBar panelbar = e.Item.FindControl("RadPanelBar1") as RadPanelBar;

Literal textLiteral = panelbar.FindItemByText("Text").FindControl("LiteralText") as Literal;

textLiteral.Text = row["Text"].ToString();

Literal valueLiteral = panelbar.FindItemByText("Value").FindControl("LiteralValue") as Literal;

valueLiteral.Text = row["Value"].ToString();

}

Attached is a sample for reference.

All the best,
Peter
the Telerik team

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