lep1
asked on
How to Create Instance of Existing Object via Casting
I am creating a DataGridView dynamically at run-time, and cant seem to be able to instantiate it as an object during casting in another (Form1) subroutine, so that I can change row labels.
Here is how I define the DataGridView in the Form1 Load procedure:
Later, in a subroutine, when I want to change the row labels (numrows is the number of rows), I can't get the cast to work correctly because the cast won't allow me to use "As New" -- as follows:
What is the correct way instantiate as an object a control that was spawned dynamically?
Here is how I define the DataGridView in the Form1 Load procedure:
Dim DataGridView1 As New DataGridViewLater, in a subroutine, when I want to change the row labels (numrows is the number of rows), I can't get the cast to work correctly because the cast won't allow me to use "As New" -- as follows:
Dim DataGridview1 As DataGridView = CType(Me.Controls("DataGridView1"), DataGridView)
For i = 1 To numrows
DataGridview1.Columns.Add(i, "V" & i)
NextWhat is the correct way instantiate as an object a control that was spawned dynamically?
Melih SARICA
what error u got ?
ASKER
The error is that DataGridView1 is Nothing
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ASKER
It worked out that the the syntax
Dim DataGridView1 As New DataGridView
does not add the name "DataGridView1" to the control, so therefore it can't be found in Me.Controls().
I had to use:
DataGridView1.Name="DataGr
Question: is there a difference between
Dim DataGridView1 As DataGridView
and
Dim DataGridView1 As New DataGridView
in terms of the Name property?
Dim DataGridView1 As New DataGridView
does not add the name "DataGridView1" to the control, so therefore it can't be found in Me.Controls().
I had to use:
DataGridView1.Name="DataGr
Question: is there a difference between
Dim DataGridView1 As DataGridView
and
Dim DataGridView1 As New DataGridView
in terms of the Name property?
Dim DataGridview1 As DataGridView = CType(Me.Controls("DataGri
in this line, ur trying to find a control that is already on the page ? or trying to add a new one ?
I guess ur trying to find a newly created one..
so u ave to set a name, other wise ssytem ll gave a name automaticly.
in this line, ur trying to find a control that is already on the page ? or trying to add a new one ?
I guess ur trying to find a newly created one..
so u ave to set a name, other wise ssytem ll gave a name automaticly.
ASKER
ok, thanks