Get value of a label control inside the DetailsView

Question

User-2029388304 posted

Hi everyone,

I have a databound label control (i.e. Label 3) inside an Item Template that's in a DetailsView control. I just need to get the value of those label and compare it to some string. I tried several ways (i.e. Find control, DetailsView.Row) but nothing seems to work. I don't know if I'm using the FindControl methos correctly or if I need to access the Row first and do the findcontrol method.

 

Protected Sub DetailsView4_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles DetailsView4.DataBound

        'If (DetailsView4.Rows(2).Cells(1).ToString = "Regular") Then
        'Label3.ForeColor = Drawing.Color.Azure

        'End If

        'Dim StatusQualifierContainer As Label
        'Dim S As String
        'StatusQualifierContainer = DetailsView4.FindControl(Label3.Text)
        'S = StatusQualifierContainer.Text

        'If S = "Regular" Then
        'Label5.ForeColor = Drawing.Color.Aqua
        'End If

        'Dim C As Label = DetailsView4.FindControl("Label3")
        'If C.Text = "Regular" Then
        'Label3.ForeColor = Drawing.Color.DarkBlue
        'End If


        'Dim headerRow As DetailsViewRow = DetailsView4.HeaderRow
        'Dim lblText As Label = CType(headerRow.FindControl("Label3"), Label)
        'Dim txt As String = lblText.ToString()
        'If txt.Contains("Regular") Then
        'Label3.ForeColor = Drawing.Color.Blue
        'Label3.Visible = False
        'End If

        'Dim a As DetailsViewRowCollection = DetailsView4.Rows
        'Dim lblText As Label = CType(DetailsView4.FindControl("Label3"), Label)
        'Dim txt As String = lblText.ToString()
        'If txt.Contains("Regular") Then
        'Label3.ForeColor = Drawing.Color.Blue
        'Label3.Visible = False
        'End If

        Dim A As Label = DetailsView4.FindControl("Label3")
        Dim B As String = A.Text.ToString()
        If B = "Regular" Then
            Label3.ForeColor = Drawing.Color.Blue
            Label3.Visible = False
        End If


    End Sub

<asp:DetailsView ID="DetailsView4" runat="server" AutoGenerateRows="False" 
            DataSourceID="LastPorposalStatusDataSource" cssClass="TableRows" 
            Height="50px" Width="100%" >
            <FieldHeaderStyle cssClass="TableHeading" Width="250px" />
            <AlternatingRowStyle CssClass="TableAlternateRows" Width="100%"/>
            <RowStyle CssClass="TableRowStyle" /> 
            <Fields>
                <asp:TemplateField SortExpression="Location of proposal">
                    <EditItemTemplate>
                        <asp:TextBox ID="TextBox1" runat="server" 
                            Text='<%# Bind("[Location of proposal]") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <InsertItemTemplate>
                        <asp:TextBox ID="TextBox1" runat="server" 
                            Text='<%# Bind("[Location of proposal]") %>'></asp:TextBox>
                    </InsertItemTemplate>
                    <ItemTemplate>
                        This proposal was submitted for <asp:Label ID="Label3" runat="server" 
                            Text='<%# Bind("[Status Qualifier]") %>'></asp:Label>
                         on
                        <asp:Label ID="Label4" runat="server" Text='<%# Bind("[Status Date]") %>'></asp:Label>
                        . Currently, your proposal is with the
                        <asp:Label ID="Label1" runat="server" 
                            Text='<%# Bind("[Location of proposal]") %>'></asp:Label>
                        . According to our system, the proposal is
                        <asp:Label ID="Label2" runat="server" Text='<%# Bind("[Current Status]") %>'></asp:Label>
                        .
                        <asp:Label ID="lblText3" runat="server" Text="Label"></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
            </Fields>
        </asp:DetailsView>

Many thanks for your inputs. I would greatly appreciate it.

 

 

Answer 1

User626880745 posted

DetailsView4.FindControl(Label3.Text) 

Its a TemplateField. FindControl() is what you need to use. for example:

Dim lbl As Label = DirectCast(DetailsView4.FindControl("Label3"), Label)

debug that. see whether you get lbl (as not nothing) and then get the .Text

Answer 2

User-1491938696 posted

You were very close, I think you had used the wrong name for the label - it should be lblText3 after you have declared the new Label variable.  This will work for you:

Dim lblText3 As Label = DetailsView4.FindControl("Label3")
        lblText3.Text.ToString()
        If (lblText3.Text = "Regular") Then
            lblText3.ForeColor = Drawing.Color.Blue
        End If

 

 

 

 

 

Answer 3

User-2029388304 posted

Hello Peter,

Wow, you're right. I've been searching for answers since yesterday with no luck. Thank you so so much!

I did the code below (I don't know if this is the one you're saying) but I guess it worked because I saw the text color change now.  

        Dim A As Label = DirectCast(DetailsView4.FindControl("Label3"), Label)
        If (Not A Is Nothing) Then
            Dim B As String = A.Text.ToString
            Select Case B
                Case "Regular"
                    Label3.ForeColor = Drawing.Color.Blue

                Case Else

            End Select
        End If

However, I have one more clarifications on this one. It seems to me that DirectCast is used to access the Label control inside the template field. Do I have to use that each time i need to access controls inside the template?

I wonder how I can access the Label (lblText3 in the code above) I've added to display a particular text if the condition above is true. I can't seem to find how I can drill down to the controls inside that detailsView.

Again, thanks a lot. You've been of great help.

 

 

Answer 4

User626880745 posted

you're welcome. 

It seems to me that DirectCast is used to access the Label control inside the template field. Do I have to use that each time i need to access controls inside the template?

Actually its the FindControl() method that is significant here in finding a templated control. the cast is done with TryCast or DirectCast; I won't rant on that one, the documentation should guide you: http://msdn.microsoft.com/en-us/library/zyy863x8(VS.80).aspx (we also have some threads on the differences, I remember one such). FYI, VB.NET does casting implicitly, vs whereas, in C#, the compiler needs it explicitly. 

I wonder how I can access the Label (lblText3 in the code above)

same way as you found the other control, using FindControl()

Answer 5

User-2029388304 posted

 

Thanks again, Peter!

I will do my research on DirectCast.  

Answer 6

User-577741185 posted

You need to cast it to the right control.

Dim lblText3 As Label = DirectCast(DetailsView4.FindControl("Label3"), Label

Dim lblText3 As Label = DirectCast(DetailsView4.FindControl("Label3"), Label)