Use Existing Object by String Name

[Damon Gravning via DotNetMonster.com]

I am trying to use one function to handle a SelectedIndexChanged event for 5 radio button groups that correspond to 5 populated Datagrids. The radio buttons have a choice of 5,10 25 for a datagrid.pagesize.

I am having trouble trying to find a way to pass the name of the existing datagrid object to the function and to have it assign its the appropriate datasource, pagesize and rebind.

I found a post with this ControlFromName Function and have tried to use it but it fails with s SystemNullException in the function. Please bear with my lack of knowledge on this, reflection and some of this heavy programming is new to me. Here i my code blurb and the function as I have it. I did change it to use WebControl instead of Control since this is on as aspx page.

Thanks for any help. Damon
Dim dv As DataView
Dim dg As DataGrid
dg = CType(ControlFromName("dgToH1"), DataGrid)
dg.DataSource = dv
dg.DataBind()

Private Function ControlFromName(ByVal name As String) As WebControl
Dim o As Object
o = Me.GetType().GetField(name, Reflection.BindingFlags.Public Or _
Reflection.BindingFlags.NonPublic Or _
Reflection.BindingFlags.Instance Or _
Reflection.BindingFlags.IgnoreCase).GetValue(Me)

Return (CType(o, WebControl))
End Function

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[Zoury]

hi!

i've just answered this one on the french ng.. the answer is still in my
clipboard :O)
http://groups.google.com/groups?thre...TNGP10.phx.gbl

--
Best Regards
Yanick
"Damon Gravning via DotNetMonster.com" <fo***@DotNetMonster.com> a écrit
dans le message de
news:ab******************************@DotNetMonste r.com...

I am trying to use one function to handle a SelectedIndexChanged event for 5 radio button groups that correspond to 5 populated Datagrids. The radio
buttons have a choice of 5,10 25 for a datagrid.pagesize.
I am having trouble trying to find a way to pass the name of the existing datagrid object to the function and to have it assign its the appropriate
datasource, pagesize and rebind.
I found a post with this ControlFromName Function and have tried to use it but it fails with s SystemNullException in the function. Please bear with
my lack of knowledge on this, reflection and some of this heavy programming
is new to me. Here i my code blurb and the function as I have it. I did
change it to use WebControl instead of Control since this is on as aspx
page.
Thanks for any help. Damon
Dim dv As DataView
Dim dg As DataGrid
dg = CType(ControlFromName("dgToH1"), DataGrid)
dg.DataSource = dv
dg.DataBind()

Private Function ControlFromName(ByVal name As String) As WebControl
Dim o As Object
o = Me.GetType().GetField(name, Reflection.BindingFlags.Public Or _
Reflection.BindingFlags.NonPublic Or _
Reflection.BindingFlags.Instance Or _
Reflection.BindingFlags.IgnoreCase).GetValue(Me)

Return (CType(o, WebControl))
End Function

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[Dennis]

Could you just pass the control as an object to the Function;

Function myfunction(mygrid as DataGrid)
mygrid.property...
End Function

"Zoury" wrote:

hi!

i've just answered this one on the french ng.. the answer is still in my
clipboard :O)
http://groups.google.com/groups?thre...TNGP10.phx.gbl

--
Best Regards
Yanick
"Damon Gravning via DotNetMonster.com" <fo***@DotNetMonster.com> a écrit
dans le message de
news:ab******************************@DotNetMonste r.com...

I am trying to use one function to handle a SelectedIndexChanged event for

5 radio button groups that correspond to 5 populated Datagrids. The radio
buttons have a choice of 5,10 25 for a datagrid.pagesize.

I am having trouble trying to find a way to pass the name of the existing

datagrid object to the function and to have it assign its the appropriate
datasource, pagesize and rebind.

I found a post with this ControlFromName Function and have tried to use it

but it fails with s SystemNullException in the function. Please bear with
my lack of knowledge on this, reflection and some of this heavy programming
is new to me. Here i my code blurb and the function as I have it. I did
change it to use WebControl instead of Control since this is on as aspx
page.

Thanks for any help. Damon
Dim dv As DataView
Dim dg As DataGrid
dg = CType(ControlFromName("dgToH1"), DataGrid)
dg.DataSource = dv
dg.DataBind()

Private Function ControlFromName(ByVal name As String) As WebControl
Dim o As Object
o = Me.GetType().GetField(name, Reflection.BindingFlags.Public Or _
Reflection.BindingFlags.NonPublic Or _
Reflection.BindingFlags.Instance Or _
Reflection.BindingFlags.IgnoreCase).GetValue(Me)

Return (CType(o, WebControl))
End Function

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