Dynamically Creating Textbox - Object Reference Not Set to an Inst

[=?Utf-8?B?a2VubnltY2U=?=]

Hi,

I'm probably being somewhat dim here and missing something obvious, but I'm
trying to dynamically create a text box and then retrieve its value after
postback.

Partial Public Class _Default
Inherits System.Web.UI.Page

Private Sub Page_Init(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Me.Init
Dim txtTest As New TextBox
PlaceHolder1.Controls.Add(txtTest)

End Sub

Private Sub Button1_Click(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Button1.Click

Dim myTextBox As TextBox
myTextBox = PlaceHolder1.FindControl("txtTest")
Response.Write("Value for dynamic textbox = " & myTextBox.Text)

End Sub
End Class

I'm getting an "Object Reference Not Set to an Instance" error on the line:

Response.Write("Value for dynamic textbox = " & myTextBox.Text)

It seems that the FindControl function isn't able to find my textbox.

Please can somebody help?

Thanks in advance,

--
Kenny.
Systems Developer

[nick chan]

Dim txtTest As New TextBox
txtText.ID = "txtTest"

kennymce wrote:

Hi,

I'm probably being somewhat dim here and missing something obvious, but I'm
trying to dynamically create a text box and then retrieve its value after
postback.

Partial Public Class _Default
Inherits System.Web.UI.Page

Private Sub Page_Init(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Me.Init
Dim txtTest As New TextBox
PlaceHolder1.Controls.Add(txtTest)

End Sub

Private Sub Button1_Click(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Button1.Click

Dim myTextBox As TextBox
myTextBox = PlaceHolder1.FindControl("txtTest")
Response.Write("Value for dynamic textbox = " & myTextBox.Text)

End Sub
End Class

I'm getting an "Object Reference Not Set to an Instance" error on the line:

Response.Write("Value for dynamic textbox = " & myTextBox.Text)

It seems that the FindControl function isn't able to find my textbox.

Please can somebody help?

Thanks in advance,

--
Kenny.
Systems Developer

[=?Utf-8?B?a2VubnltY2U=?=]

Thank you, Mr Chan. Sorted.
--
Kenny.
Systems Developer
"nick chan" wrote:

Dim txtTest As New TextBox
txtText.ID = "txtTest"

kennymce wrote:

Hi,

I'm probably being somewhat dim here and missing something obvious, but I'm
trying to dynamically create a text box and then retrieve its value after
postback.

Partial Public Class _Default
Inherits System.Web.UI.Page

Private Sub Page_Init(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Me.Init
Dim txtTest As New TextBox
PlaceHolder1.Controls.Add(txtTest)

End Sub

Private Sub Button1_Click(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Button1.Click

Dim myTextBox As TextBox
myTextBox = PlaceHolder1.FindControl("txtTest")
Response.Write("Value for dynamic textbox = " & myTextBox.Text)

End Sub
End Class

I'm getting an "Object Reference Not Set to an Instance" error on the line:

Response.Write("Value for dynamic textbox = " & myTextBox.Text)

It seems that the FindControl function isn't able to find my textbox.

Please can somebody help?

Thanks in advance,

--
Kenny.
Systems Developer

[nick chan]

if im not mistaken, you can also do this

Dim txtTest As New TextBox
* * Private Sub Page_Init(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Me.Init
* * * *
* * * * PlaceHolder1.Controls.Add(txtTest)

* * End Sub
* * Private Sub Button1_Click(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Button1.Click

* * * * Response.Write("Value for dynamic textbox = " & txtTest.Text)

* * End Sub

On Jul 2, 3:46*pm, kennymce <[e-mail]>
wrote:

Hi,

I'm probably being somewhat dim here and missing something obvious, but I'm
trying to dynamically create a text box and then retrieve its value after
postback.

Partial Public Class _Default
* * Inherits System.Web.UI.Page

* * Private Sub Page_Init(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Me.Init
* * * * Dim txtTest As New TextBox
* * * * PlaceHolder1.Controls.Add(txtTest)

* * End Sub

* * Private Sub Button1_Click(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Button1.Click

* * * * Dim myTextBox As TextBox
* * * * myTextBox = PlaceHolder1.FindControl("txtTest")
* * * * Response.Write("Value for dynamic textbox = " & myTextBox.Text)

* * End Sub
End Class

I'm getting an "Object Reference Not Set to an Instance" error on the line:

Response.Write("Value for dynamic textbox = " & myTextBox.Text)

It seems that the FindControl function isn't able to find my textbox.

Please can somebody help?

Thanks in advance,

--
Kenny.
Systems Developer