Quick check to see if Columnname exists in a datagridview

[RSH]

Hi,

I have a situation where I have a dynamically loaded DataGridView and I need
to see if a particular column exists in the DataGridView before I enable it
for editing. Is there an easy way to see if the column exists?

Thanks!
Ron

[RSH]

Re: Quick check to see if Columnname exists in a datagridview

Silly me!

In case anyone else was wondering...

if (dataGridView1. Columns["Modified"] != null)

{

dataGridView1.C olumns["Modified"].ReadOnly = true;

}





"RSH" <way_beyond_oop s@yahoo.com> wrote in message
news:%23zVgbXFT GHA.4608@tk2msf tngp13.phx.gbl. ..[color=blue]
> Hi,
>
> I have a situation where I have a dynamically loaded DataGridView and I
> need to see if a particular column exists in the DataGridView before I
> enable it for editing. Is there an easy way to see if the column exists?
>
> Thanks!
> Ron
>[/color]

[Lars-Inge Tønnessen \(VJ# MVP\)]

Re: Quick check to see if Columnname exists in a datagridview

Please use the "Columns.Contai ns("column name")" method.
Example:

Lets say we have a DataGrid called "dataGridView1" .

this.dataGridVi ew1.Columns.Add ("One", "One");

if (this.dataGridV iew1.Columns.Co ntains("One"))
System.Windows. Forms.MessageBo x.Show("Yes");

this.dataGridVi ew1.Columns.Add ("Two", "Two");
this.dataGridVi ew1.Columns.Add ("Three", "Three");


Regards,
Lars-Inge Tønnessen
Siemens Medical - Norway

[Lars-Inge Tønnessen \(VJ# MVP\)]

Re: Quick check to see if Columnname exists in a datagridview

Please use "Contains". :o)

Regards,
Lars-Inge Tønnessen
Siemens Medical - Norway

[RSH]

Re: Quick check to see if Columnname exists in a datagridview

What is the difference? This appears to work as is outright.


"Lars-Inge Tønnessen (VJ# MVP)" <http://emailme.larsing e.com> wrote in
message news:u$QRuAGTGH A.1576@tk2msftn gp13.phx.gbl...[color=blue]
> Please use the "Columns.Contai ns("column name")" method.
> Example:
>
> Lets say we have a DataGrid called "dataGridView1" .
>
> this.dataGridVi ew1.Columns.Add ("One", "One");
>
> if (this.dataGridV iew1.Columns.Co ntains("One"))
> System.Windows. Forms.MessageBo x.Show("Yes");
>
> this.dataGridVi ew1.Columns.Add ("Two", "Two");
> this.dataGridVi ew1.Columns.Add ("Three", "Three");
>
>
> Regards,
> Lars-Inge Tønnessen
> Siemens Medical - Norway
>
>[/color]

[Demetri]

Re: Quick check to see if Columnname exists in a datagridview

1. Its a more reliable method of determining if a column exists. By your
method what if you port your code to .Net 2.x and in the new version it does
not return null but instead it returns an empty column?

2. Its just better coding practice. It begs the question, why did Microsoft
bother giving you a Contains method? Think about it.

3. It also explicitly states your intentions, which is probably the most
important factor of all.

--
-Demetri


"RSH" wrote:
[color=blue]
> What is the difference? This appears to work as is outright.
>
>
> "Lars-Inge Tønnessen (VJ# MVP)" <http://emailme.larsing e.com> wrote in
> message news:u$QRuAGTGH A.1576@tk2msftn gp13.phx.gbl...[color=green]
> > Please use the "Columns.Contai ns("column name")" method.
> > Example:
> >
> > Lets say we have a DataGrid called "dataGridView1" .
> >
> > this.dataGridVi ew1.Columns.Add ("One", "One");
> >
> > if (this.dataGridV iew1.Columns.Co ntains("One"))
> > System.Windows. Forms.MessageBo x.Show("Yes");
> >
> > this.dataGridVi ew1.Columns.Add ("Two", "Two");
> > this.dataGridVi ew1.Columns.Add ("Three", "Three");
> >
> >
> > Regards,
> > Lars-Inge Tønnessen
> > Siemens Medical - Norway
> >
> >[/color]
>
>
>[/color]

[Lars-Inge Tønnessen \(VJ# MVP\)]

Re: Quick check to see if Columnname exists in a datagridview

The Microsoft developers always use this method when they are writing code.
I guess it has something to do with forward compatibility and stability.

Regards,
Lars-Inge Tønnessen

[RSH]

Re: Quick check to see if Columnname exists in a datagridview

Fair enough.

Thank you.

Ron

"Lars-Inge Tønnessen (VJ# MVP)" <http://emailme.larsing e.com> wrote in
message news:OlzuFiGTGH A.224@TK2MSFTNG P10.phx.gbl...[color=blue]
> The Microsoft developers always use this method when they are writing
> code. I guess it has something to do with forward compatibility and
> stability.
>
> Regards,
> Lars-Inge Tønnessen
>
>[/color]