Why this error message?

  • Thread starter Thread starter pvong
  • Start date Start date
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pvong

VB.NET / ASP.NET

I have a simple test. One simple Formview connected to a datasource. I
have Button1 outside of the Formview. The Formview starts in ReadOnlyMode.
All I want to do is on the button click, change the formview to Insert mode
and then put the current date in the date textbox. The date textbox ID is
DateTextBox and I've double check that to make sure it's right. Here's my
simple code.

Protected Sub Button1_Click1(ByVal sender As Object, ByVal e As
System.EventArgs)

FormView1.ChangeMode(FormViewMode.Insert)

Dim datetb As TextBox = FormView1.FindControl("DateTextBox")

datetb.Text = Now.Date.ToShortDateString()

End Sub


This is the error message I'm getting.

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.

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

Source Error:

Line 6: FormView1.ChangeMode(FormViewMode.Insert)
Line 7: Dim datetb As TextBox =
FormView1.FindControl("DateTextBox")
Line 8: datetb.Text = Now.Date.ToShortDateString()
Line 9: End Sub
Line 10: </script>


Thanks in advance!
Phil
 
VB.NET / ASP.NET

I have a simple test. One simple Formview connected to a datasource. I
have Button1 outside of the Formview. The Formview starts in ReadOnlyMode.
All I want to do is on the button click, change the formview to Insert mode
and then put the current date in the date textbox. The date textbox ID is
DateTextBox and I've double check that to make sure it's right. Here's my
simple code.

Protected Sub Button1_Click1(ByVal sender As Object, ByVal e As
System.EventArgs)

FormView1.ChangeMode(FormViewMode.Insert)

Dim datetb As TextBox = FormView1.FindControl("DateTextBox")

datetb.Text = Now.Date.ToShortDateString()

End Sub

This is the error message I'm getting.

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.

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

Source Error:

Line 6: FormView1.ChangeMode(FormViewMode.Insert)
Line 7: Dim datetb As TextBox =
FormView1.FindControl("DateTextBox")
Line 8: datetb.Text = Now.Date.ToShortDateString()
Line 9: End Sub
Line 10: </script>

Thanks in advance!
Phil
Click to expand...

Hi Phil

Are there any entry in the datasource?
 
Yes, there are entries in the Datasource. If I manually put the date in, it
works perfectly. I just want when the user clicks this button for the
formview to auto switch to Insert mode and auto put in today's date for them
in the datetb.
Thanks!
Phil
 
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