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Multiple Text Boxes

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Birju
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Birju asked on 01 Dec 2010, 10:26 PM
Dim insertQuantity As String
Dim insertEquipment As String
Dim intNumber As Integer = 1
Dim newControl As New Control
For intNumber = 1 To 1
    insertQuantity = "txtQuantity" + CStr(intNumber)
    insertEquipment = "txtEquipment" + CStr(intNumber)
    newControl = DirectCast(Me.FindControl(insertQuantity), TextBox)
    If (Not newControl Is Nothing) Then
        Response.Write("Cant find control ")
    Else
        Response.Write("Found the control")
        newControl = DirectCast(Me.FindControl(insertQuantity), TextBox)
    End If
Next intNumber
Hello There,

i am trying to retrieve values from multiple text boxes.  i Created the textboxes(quantity1, quantity2, etc)
and i am trying to pull these values when a user clicks the button.  This is what i have so far.

Please help.  When i access newControl.Text it is giving me a null reference to an instance of an object. Thank  you.

 

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Vinkel
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answered on 02 Dec 2010, 09:24 AM
Do you have existing Control instance with id:

insertQuantity = "txtQuantity" + CStr(intNumber)

when you search for textbox? Debug your code and see.

-J
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Birju
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answered on 02 Dec 2010, 02:55 PM
Yes i do. I have the textboxes created in design view.

 

 

<td class="style2">
  <asp:Label ID="lblQuantity1" runat="server" Text="Quantity :"></asp:Label>
</td>
  
<td class="style3">
<asp:TextBox ID="txtQuantity1" runat="server"></asp:TextBox>
  
</td>

I tried different ways but i am getting the same error. Please help!!

 

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Shinu
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answered on 03 Dec 2010, 07:46 AM
Hi Birju,


The code should work if the controls are directly on page as it working for me. In your code I found that, you are showing "Cant find control" when control is Not Nothing (If (Not newControl Is Nothing) Then)  . Please have a look on this line and see whether you missed something.

Also, have you placed these controls inside any other container control, or is it directly on page?


-Shinu.
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Birju
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answered on 03 Dec 2010, 02:41 PM
Hey Shinu,

 Yes the controls are in a container.  Its on a <asp:content> tag.  I was trying to do something like Placeholder.Controls.Add(newTextBox).  But it wont pop up the properties when i write the statement. 

<

 

asp:Content ID="Content3" ContentPlaceHolderID="ContentPlaceHolder2" Runat="Server">

 

 Thats what im referring to where the controls are on the page. Please advise.  Yes i switched the If statement around so it shows correctly.   How come i can not access the .text thats in txtQuantity1 and place it in newtextBox.Text? It gives the null reference to instance of an object.
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