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Button click not recognized(?)

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TSCGlobal
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TSCGlobal asked on 06 Jul 2010, 08:18 PM
Some context to this particular task;

I have a news system I am updating with the ability to see comments and to post comment in a RadWindow.  So far, I have been able to get the "show comments" to work by using a combination of the "select" command and session variables, but when I try to wire up the other LinkButton to open another RadWindow to insert a new comment into the database, it seems to default to the code I have done for the selectedItem instead.  I'm hoping someone can help me figure this one out.

the *.aspx:
<!-- Windows Begin --> 
<telerik:RadWindowManager ID="TrackWindowManager" runat="server" ShowContentDuringLoad="False">  
    <Windows> 
        <telerik:RadWindow runat="server" ID="CommentsWindow" 
            VisibleOnPageLoad="false" 
            Title="Comments Window" 
            Width="600" Height="500" 
            NavigateUrl="~/NewsComments.aspx" /> 
        <telerik:RadWindow runat="server" ID="PostCommentWindow" 
            VisibleOnPageLoad="false" 
            Title="Post Comments" 
            Width="600" Height="500" 
            NavigateUrl="~/PostNewsComment.aspx" /> 
    </Windows> 
</telerik:RadWindowManager> 
<!-- Windows End --> 
 
<!-- RadOpen Javascript begins --> 
<script type="text/javascript">  
    function openRadWin()   
        {  
            radopen(null, "CommentsWindow");  
        }                                                                        
</script> 
<!-- RadOpen Javascript ends --> 
 
<telerik:RadListView ID="RadListView1" runat="server"   
    DataSourceID="dsNews" 
    DataKeyNames="NewsID">  
    <ItemTemplate> 
        <table cellpadding="0" cellspacing="0" class="NewsTable">  
            <tr> 
                <td class="NewsHeader">  
                    <asp:Label ID="lblTitle" runat="server" Text='<%# Eval("Title") %>' />&nbsp;-  
                    <asp:Label ID="lblDate" runat="server" Text='<%# Eval("ActDate") %>' /> 
                </td> 
            </tr> 
            <tr> 
                <td class="NewsContent">  
                    <asp:Label ID="lblStory" runat="server" Text='<%# Eval("NewsContent") %>' /> 
                    <asp:Label ID="lblNewsID" runat="server" Text='<%# Eval("NewsID") %>' Visible="false" /> 
                </td> 
            </tr> 
            <tr> 
                <td> 
                    <asp:LinkButton ID="lbShowComments" runat="server"   
                        Text="Show Comments" 
                        CommandName="Select" />&nbsp;  
                    <asp:LinkButton ID="lbPostComment" runat="server" 
                        CommandName="PostComment" 
                        Text="Post Comment" /> 
                </td> 
            </tr> 
        </table>          
    </ItemTemplate> 
    <SelectedItemTemplate> 
        <table cellpadding="0" cellspacing="0" class="NewsTable">  
            <tr> 
                <td class="NewsHeader">  
                    <asp:Label ID="lblTitle" runat="server" Text='<%# Eval("Title") %>' />&nbsp;-  
                    <asp:Label ID="lblDate" runat="server" Text='<%# Eval("ActDate") %>' /> 
                </td> 
            </tr> 
            <tr> 
                <td class="NewsContent">  
                    <asp:Label ID="lblStory" runat="server" Text='<%# Eval("NewsContent") %>' /> 
                    <asp:Label ID="lblNewsID" runat="server" Text='<%# Eval("NewsID") %>' Visible="false" /> 
                </td> 
            </tr> 
            <tr> 
                <td> 
                    <asp:LinkButton ID="lbShowComments" runat="server"   
                        Text="Show Comments" 
                        CommandName="Select" />&nbsp;  
                    <asp:LinkButton ID="lbPostComment" runat="server" 
                        CommandName="PostComment" 
                        Text="Post Comment" /> 
                </td> 
            </tr> 
        </table>     
    </SelectedItemTemplate> 
</telerik:RadListView> 

and here's the VB.NET code:
    Private Sub RadListView1_SelectedIndexChanged(ByVal sender As ObjectByVal e As System.EventArgs) Handles RadListView1.SelectedIndexChanged  
 
        Dim NewsIdent As Label  
 
        NewsIdent = RadListView1.SelectedItems(0).FindControl("lblNewsID")  
        Session.Add("NewsID", NewsIdent.Text)  
        Me.CommentsWindow.VisibleOnPageLoad = True 
 
    End Sub 
 
    Sub PostComment()  
 
        Dim NewsIdent As Label  
 
        NewsIdent = RadListView1.SelectedItems(0).FindControl("lblNewsID")  
        Session.Add("NewsID", NewsIdent.Text)  
        PostCommentWindow.VisibleOnPageLoad = True 
 
    End Sub 

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Rosen
Telerik team
answered on 07 Jul 2010, 07:35 AM
Hi,

In order to handle custom commands you should hook to ItemCommand event of RadListView and add the appropriate logic there.

Regards,
Rosen
the Telerik team
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TSCGlobal
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answered on 07 Jul 2010, 05:16 PM
Okay, so I changed the Listview as follows;

<telerik:RadListView ID="RadListView1" runat="server"   
    DataSourceID="dsNews" 
    DataKeyNames="NewsID">  
    <ItemTemplate> 
        <table cellpadding="0" cellspacing="0" class="NewsTable">  
            <tr> 
                <td class="NewsHeader">  
                    <asp:Label ID="lblTitle" runat="server" Text='<%# Eval("Title") %>' />&nbsp;-  
                    <asp:Label ID="lblDate" runat="server" Text='<%# Eval("ActDate") %>' /> 
                </td> 
            </tr> 
            <tr> 
                <td class="NewsContent">  
                    <asp:Label ID="lblStory" runat="server" Text='<%# Eval("NewsContent") %>' /> 
                    <asp:Label ID="lblNewsID" runat="server" Text='<%# Eval("NewsID") %>' Visible="false" /> 
                </td> 
            </tr> 
            <tr> 
                <td> 
                    <asp:LinkButton ID="lbShowComments" runat="server" 
                        Text="Show Comments" 
                        CommandName="Select" />&nbsp;  
                    <asp:LinkButton ID="lbPostComment" runat="server" 
                        OnClick="PostComment" 
                        Text="Post Comment" /> 
                </td> 
            </tr> 
        </table>          
    </ItemTemplate> 
    <SelectedItemTemplate> 
        <table cellpadding="0" cellspacing="0" class="NewsTable">  
            <tr> 
                <td class="NewsHeader">  
                    <asp:Label ID="lblTitle" runat="server" Text='<%# Eval("Title") %>' />&nbsp;-  
                    <asp:Label ID="lblDate" runat="server" Text='<%# Eval("ActDate") %>' /> 
                </td> 
            </tr> 
            <tr> 
                <td class="NewsContent">  
                    <asp:Label ID="lblStory" runat="server" Text='<%# Eval("NewsContent") %>' /> 
                    <asp:Label ID="lblNewsID" runat="server" Text='<%# Eval("NewsID") %>' Visible="false" /> 
                </td> 
            </tr> 
            <tr> 
                <td> 
                    <asp:LinkButton ID="lbShowComments" runat="server" 
                        Text="Show Comments" 
                        CommandName="Select" />&nbsp;  
                    <asp:LinkButton ID="lbPostComment" runat="server" 
                        CommandName="PostComment" 
                        Text="Post Comment" /> 
                </td> 
            </tr> 
        </table>     
    </SelectedItemTemplate> 
</telerik:RadListView> 

and then I changed the VB.NET codebehind to this;
    Private Sub RadListView1_ItemCommand(ByVal sender As ObjectByVal e As Telerik.Web.UI.RadListViewCommandEventArgs) Handles RadListView1.ItemCommand  
 
        PostComment()  
 
    End Sub 
 
    Private Sub RadListView1_SelectedIndexChanged(ByVal sender As ObjectByVal e As System.EventArgs) Handles RadListView1.SelectedIndexChanged  
 
        PostComment()  
 
    End Sub 
 
    Sub PostComment()  
 
        Dim NewsIdent As Label  
 
        NewsIdent = RadListView1.SelectedItems(0).FindControl("lblNewsID")  
        Session.Add("NewsID", NewsIdent.Text)  
        PostCommentWindow.VisibleOnPageLoad = True 
 
    End Sub 

BUT, when I click the "post comment" button, I get an "out of index" error.  I'm not certain why, but if I had to guess, I would guess that when I click the "Post Comment" button, that the item is not being selected.  Would this be a correct assumption?

If so, how can I make sure that when I click the "Post Comment" button that item is selected?  Also, I wasn't sure if the ItemCommand event fired, or if it goes directly to PostComment sub, so I handled the ItemCommand event just to be on the safe side....
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Rosen
Telerik team
answered on 09 Jul 2010, 04:49 PM
Hi,

You should modify the ItemCommand event handler in the following way:

Protected Sub RadListView1_ItemCommand(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadListViewCommandEventArgs) Handles RadListView1.ItemCommand
    If e.CommandName = "PostComment" Then
        DirectCast(e.ListViewItem, RadListViewDataItem).Selected = True
        PostComment()
        e.ListViewItem.OwnerListView.Rebind() ' needed in order the Item to enter Select mode
    End If
End Sub

And setting both the SelectedItemTemplate and ItemTemplate button's CommandName to PostComment.

<asp:LinkButton ID="lbPostComment" runat="server"  
     CommandName="PostComment"  
     Text="Post Comment" />  

Sincerely yours,
Rosen
the Telerik team
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TSCGlobal
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Rosen
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