ComboBox Setting both DataSource and SelectedIndex

[samueltilden@gmail.com]

This problem should be simple.

I am using Visual Studio 2003, Version 1.1

I am writing a desktop application in which I am binding a DataTable
to the DataSource of a ComboBox.


// I have 50 rows (concerning states) in dataTable.Rows;

ComboBox myComboBox = new ComboBox();
myComboBox.Data Source = dataTable;
myComboBox.Disp layMember = "state_name ";
myComboBox.Valu eMember = "state_id";
myComboBox.Sele ctedIndex = 3;

I get an exception stating that '3' is out of range, because
myComboBox.Item s.Count = 0, not 50.

How can I set SelectedIndex when using a DataSource?

A very messy workaround is to add the items in a loop, but I would
like to use the power of DataSource.

P.S. In ASP.NET they have a DataBind() method which is absent for a
desktop application.

Thanks for your help.

[Mufaka]

Re: ComboBox Setting both DataSource and SelectedIndex

Try adding a dummy binding context to it before setting the DataSource.
I think that will trick the ListControl into populating items when the
DataSource is set.

ComboBox myComboBox = new ComboBox();
myComboBox.Bind ingContext = new BindingContext( );
....


samueltilden@gm ail.com wrote:

This problem should be simple.
>
I am using Visual Studio 2003, Version 1.1
>
I am writing a desktop application in which I am binding a DataTable
to the DataSource of a ComboBox.
>
>
// I have 50 rows (concerning states) in dataTable.Rows;
>
ComboBox myComboBox = new ComboBox();
myComboBox.Data Source = dataTable;
myComboBox.Disp layMember = "state_name ";
myComboBox.Valu eMember = "state_id";
myComboBox.Sele ctedIndex = 3;
>
I get an exception stating that '3' is out of range, because
myComboBox.Item s.Count = 0, not 50.
>
How can I set SelectedIndex when using a DataSource?
>
A very messy workaround is to add the items in a loop, but I would
like to use the power of DataSource.
>
P.S. In ASP.NET they have a DataBind() method which is absent for a
desktop application.
>
Thanks for your help.

[samueltilden@gmail.com]

Re: ComboBox Setting both DataSource and SelectedIndex

Mufaka:

Thanks so very much!

That works!

--Sam