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Not getting dropdown selected value

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ToolTip
This is a migrated thread and some comments may be shown as answers.
Web Services
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Web Services asked on 15 Jun 2012, 05:30 PM
I have a control within a tool tip. Whenever I click the button, I always get -1 for my selected value, not the selected value. I really don't know why I'm getting -1. Here is my code. The reviewerid at the bottom is always -1


<
telerik:RadToolTip ID="PaperRevTooltip" runat="server" ManualClose="True" Modal="True"
            Position="Center" RelativeTo="BrowserWindow" ShowEvent="FromCode" Skin="Telerik"
            Title="Reviewers" Width="400" Height="400">
            <asp:Repeater ID="Repeater1" runat="server">
                <HeaderTemplate>
                    <table border="0" cellpadding="0" cellspacing="5">
                </HeaderTemplate>
                <ItemTemplate>
                    <UC1:UControl ID="test3" runat="server" PaperID='<%# DataBinder.Eval(Container.DataItem, "PaperID")%>'
                        ReviewerID='<%# DataBinder.Eval(Container.DataItem, "ReviewerUserID")%>' reviewId='<%# DataBinder.Eval(Container.DataItem, "ReviewOfPaperID")%>' />
                </ItemTemplate>
                <FooterTemplate>
                    </table>
                </FooterTemplate>
            </asp:Repeater>
            <asp:SqlDataSource ID="ReviewersSqlDS" runat="server" ConnectionString="<%$ ConnectionStrings:conferencehubConnectionString %>"
                SelectCommand="admin_PaperReviewers" SelectCommandType="StoredProcedure">
                <SelectParameters>
                    <asp:Parameter Name="PaperID" Type="Int16" DefaultValue="0" Direction="Input" />
                </SelectParameters>
            </asp:SqlDataSource>
        </telerik:RadToolTip>

Here is the relevant code behind for that page. note the item command comes from a rad grid the tool tip shows, but with nothing but the title
Protected Sub item_command(ByVal source As ObjectByVal As Telerik.Web.UI.GridCommandEventArgs) Handles PapersGV.ItemCommand
       Dim index As Integer
       Dim paperID As String
       If e.CommandName = "changeRev" Then
           index = e.Item.ItemIndex
           paperID = Me.PapersGV.Items(index).GetDataKeyValue("PaperID")
           Me.PaperRevTooltip.Title = Me.PapersGV.Items(index).GetDataKeyValue("PaperTitle")
 
           loadPaperReviewersData(paperID)
 
           Me.PaperRevTooltip.visible = True
           Me.PaperRevTooltip.Show()
       Else
           Me.PaperRevTooltip.visible = False
       End If
   End Sub
Protected Sub loadPaperReviewersData(ByVal paperID As String)
       Dim dt As DataTable
       Dim connString As String = System.Configuration.ConfigurationManager.ConnectionStrings("conferencehubConnectionString").ToString
       Dim myConnection As New Data.SqlClient.SqlConnection(connString)
       Dim strSQL As String "admin_PaperReviewers"
       Dim selectCommand As New Data.SqlClient.SqlCommand(strSQL, myConnection)
       Dim SQLReader As SqlDataReader
       Dim paperIDParam As SqlParameter
       Dim values() = {"-1""-1""0", paperID, ""}
       Try
           selectCommand.CommandType = Data.CommandType.StoredProcedure
           paperIDParam = New SqlParameter("PaperId", Data.SqlDbType.Int)
           paperIDParam.Value = paperID
           selectCommand.Parameters.Add(paperIDParam)
           myConnection.Open()
           SQLReader = selectCommand.ExecuteReader()
           dt = New DataTable
           dt.Load(SQLReader)
           myConnection.Close()
 
           'While dt.Rows.Count < minReviewers
           If dt.Rows.Count < maxReviewers Then
               dt.Rows.Add(values)
           End If
 
           'End While
 
           Me.paperReviewersDT = dt
           Me.Repeater1.DataSource = dt
           Me.Repeater1.DataBind()
       Catch ex As Exception
           Response.Write("There has been an error.<br />" & ex.ToString & "<Br />" & strSQL)
       Finally
           myConnection.Close()
       End Try
   End Sub
   Private Property paperReviewersDT() As DataTable
       Get
           Return CType(ViewState("allRevs"), DataTable)
       End Get
       Set(ByVal value As DataTable)
           ViewState("allRevs") = value
       End Set
   End Property


Here is the control uc1
    <td>test
        <asp:Label ID="output" runat="server"></asp:Label>
        <asp:DropDownList ID="RevDropDownList" runat="server" DataSourceID="TrackSqlDS" DataTextField="ReviewerName"
            DataValueField="UserID">
        </asp:DropDownList>
        <asp:CustomValidator ID="revValidator" runat="server" ErrorMessage="*"></asp:CustomValidator>
    </td>
    <td>
        <asp:Button ID="AddButton" runat="server" Text="Add" CommandName="AddReviewer" />
     
        <asp:Button ID="DelButton" runat="server" Text="Delete" CommandName="DeleteReviewer"
            Visible="false" />
     
        <asp:Button ID="UpdateButton" runat="server" Text="Update" CommandName="UpdateReviewer"
            Visible="false"/>
    </td>
    <asp:SqlDataSource ID="TrackSqlDS" runat="server" ConnectionString="<%$ ConnectionStrings:conferencehubConnectionString %>"
        SelectCommand="admin_AllReviewers" SelectCommandType="StoredProcedure" OnSelecting="TrackItDataSource_Selecting">
        <SelectParameters>
            <asp:Parameter Name="PaperID" Type="Int32" />
        </SelectParameters>
    </asp:SqlDataSource>
</tr>

And the control code
    Private _ReviewerID As Integer
    Private _ReviewID As Integer
    Public Property reviewId() As Integer
        Get
            Return CType(ViewState("reviewId"), Integer)
        End Get
        Set(ByVal value As Integer)
            ViewState("reviewId") = value
        End Set
    End Property
 
    Public Property PaperID() As Integer
        Get
            Return CType(ViewState("paperId"), Integer)
        End Get
        Set(ByVal value As Integer)
            ViewState("paperId") = value
        End Set
    End Property
    Public Property ReviewerID() As Integer
        Get
            Return Me.RevDropDownList.SelectedItem.Value
        End Get
        Set(ByVal value As Integer)
            _ReviewerID = value
        End Set
    End Property
    Public ReadOnly Property ReviewerName() As String
        Get
            Return Me.RevDropDownList.SelectedItem.Text
        End Get
    End Property
#Region "SQLDS Events"
    Protected Sub TrackItDataSource_Selecting(ByVal sender As ObjectByVal As SqlDataSourceSelectingEventArgs)
        e.Command.Parameters.Item(0).Value = PaperID
    End Sub
#End Region
    Protected Sub rev_Bound(ByVal sender As ObjectByVal As System.EventArgs) Handles RevDropDownList.DataBound
        Dim defaultItem As New ListItem("- Select Reviewer -""-1")
        RevDropDownList.Items.Insert(0, defaultItem)
        output.Text = "test"
        If _ReviewerID <> 0 Then
            RevDropDownList.Items.FindByValue(_ReviewerID).Selected = True
        End If
 
        If isValid() Then
            AddButton.Visible = False
            UpdateButton.Visible = True
            DelButton.Visible = True
        End If
    End Sub
    Public Function isValid() As Boolean
        If RevDropDownList.SelectedIndex = 0 Then
            revValidator.IsValid = False
            Return False
        Else
            Return True
        End If
    End Function
    Protected Sub Page_Load(ByVal sender As ObjectByVal As System.EventArgs) Handles Me.Load
        RevDropDownList.DataBind()
        output.Text = "test"
    End Sub
    Protected Sub AddButton_Click(ByVal sender As ObjectByVal As System.EventArgs) Handles AddButton.Click
        If isValid() Then
            ReviewerID = Me.RevDropDownList.SelectedItem.Value
        End If
    End Sub

1 Answer, 1 is accepted

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Marin Bratanov
Telerik team
answered on 18 Jun 2012, 10:54 AM
Hi,

I would advise that you debug your code and follow the data from your datasources, the items that are selected in the dropdowns and see when the change occurs. What it seems to me after examining your code is that in the button click event you bind the dropdown list again, and you insert another default item:
Dim defaultItem As New ListItem("- Select Reviewer -", "-1")
RevDropDownList.Items.Insert(0, defaultItem)

as the button click's event handelr is the last method to be called in the page lifecycle. This means that the initial item that is selected will be lost. You can consider binding the dropdown list only the first time the user control is loaded and not on each postback.

If you replace the tooltip with a standard ASP panel that you show and hide in the grid's event you would have the same issues, so I advise that you resolve them in the simplest scenario you have, because they are not related to the RadToolTip.

All the best,
Marin Bratanov
the Telerik team
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ToolTip
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Web Services
Top achievements
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Answers by
Marin Bratanov
Telerik team
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