Binding a radiobuttonlist to a filtered datatable?


I have a datatable that I would like to bind to a radiobuttonlist; however, I don't want all of the items to show up, so I filtered the datatable but this doesn't seem to make a difference when binding it to the radio list.  Here is an example of my table:

1              Greater Admin    Admin
2              Admin                Admin
3              Read                  Maintenance
4              Write                 Maintenance
5              Alter                  Maintenance

plus many more.  In this case, I want only the role_names for the "maintenance" area, with the value being the role_id.  Here is my code (roleOptions is my datatable):

RadioButtonList rdoList = new RadioButtonList();
rdoList.RepeatDirection = RepeatDirection.Horizontal;
rdoList.DataSource = roleOptions;
rdoList.DataValueField = "role_id";
rdoList.DataTextField = "role_name";

It doesn't limit it to just the maintenance roles.  It shows:

*Greater Admin  *Admin  *Read  *Write  *Alter

when I want it just to show:

 *Read  *Write  *Alter

I am unsure how to make this easy.   I tried a hashtable and binding it and that worked awesome, but it put it in any order it wanted, which I couldn't do.  Then I tried a SortedList, but you can't control how it sorts so I dumped that idea too.  Then I tried the ArrayList, but I couldn't have different value and text fields with that.  So now I'm trying the datatable.  I can't limit the data to maintenance when I retrieve it because I will be using it for other things.

Thanks for the help.
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The .Select method returns a row collection but doesn't filter the datatable which you're binding to the radiobuttonlist.

Try using a row filter instead.

roleOptions.DefaultView.RowFilter = " area = 'Maintenance' ";
rdoList.DataSource = roleOptions.DefaultView;
rdoList.DataValueField = "role_id";
rdoList.DataTextField = "role_name";



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dentyneAuthor Commented:
Awesome Paul thanks!!!!
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