Access control from usercontrol

peter2004 · April 4th, 2006, 04:40 PM

Hi,
Is there a way to access a web control such as textbox from a usercontrol (.ascx page). For example, I created a usercontrol which has a textbox and dropdownlist. I placed this usercontrol on a web form (test.aspx). How do I get the textbox value that I created in my usercontrol onto this web form test.aspx. I try myControl.Attributes.items("textboxName") but it does not seem to work.

Thanks in advance,
Peter

jbenson001 · April 4th, 2006, 11:30 PM

Yes. For example, If your webusercontrol is named webusercontrol1:

declare at page level:
Protected WithEvents WebUserControl11 As WebUserControl1

Then get a reference to the textbox:
        Dim tb As New TextBox
        tb = WebUserControl11.FindControl("TextBox1")
        Response.Write(tb.Text)

peter2004 · April 5th, 2006, 04:15 PM

In your example, "TextBox1" is the text box on the web user control page, right?
It keep returning Nothing; thus returning this error:

line 30: Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 27: Dim x As Integer
Line 28: 'x = testusercontrol.Attributes.Count
Line 29: tb = testusercontrol.FindControl("txtUserID")
Line 30: Response.Write(tb.Text)[/red]

Thanks,
Peter

Peter

jbenson001 · April 5th, 2006, 11:47 PM

did you declare the page level variable and did you reference the correct control?
did you dim tb as new textbox?.. also make sure the control name is correct in the findcontrol()

peter2004 · April 6th, 2006, 04:46 PM

Thanks. Well, my problem was that I named the user control ID on the form different from what I declared on page level protected event.

Again, thank you for the help.

Peter

jbenson001 · April 6th, 2006, 10:22 PM

so you got it working?

peter2004 · April 7th, 2006, 11:22 AM

Yes I did. Thank you

Peter

jbenson001 · April 7th, 2006, 03:54 PM

Ok great!!

kamz · May 5th, 2007, 06:15 AM

Hi,
I had the same problem. As Peter said, we should specify usercontrol id and event name as same.

regards
kamz

VerbatimBOT · May 5th, 2007, 05:37 PM

I usually do it like this: in my user control I declare a property

Code:

Public ReadOnly Property TextBox1() As TextBox
    Get
        Return TextBox1
    End Get
End Property

Now, in order to access that TextBox, all you have to do is access this property like

Code:

MyUserControl.TextBox1

Best regards,
Aleksandar Dragosavac