How to filter one combobox based on another combobox selection?

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I am trying to filter comboboxes populated with data from a local sqlserverce database. My task is to select one index in one combobox and have that result filter the next combobox. Would LINQ work for this or can I do it with just plain SQL? I am using Visual Studio 2010/2012 with SQL Server CE Edition. I would appreciate any help.

Posted 10-Sep-12 18:51pm

joshrduncan2012

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Rockstar_ 11-Sep-12 1:06am

yes you can do it just by plain sql

Rockstar_ 11-Sep-12 1:07am

Just write your code in the selectedIndex event of the first combobox.

ridoy 11-Sep-12 1:19am

you can do it in both ways..only sql or only LINQ can do it.

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*Karthik Harve* · Answer 1 · 2012-09-10T19:01:00

Hi,

ofcourse you can use linq in this.

try this,

C#

protected void combobox1_selectedIndexChanged(object sender, EventArgs e)
{
   //DataSet Objs holds data from sql server with two datatables one is source for combobox1 and other is source for combobox2
   DataTable dt = (from val in Objds.Tables[2].AsEnumerable() where val.Field<string>("Column1")== combobox1.SelectedValue select val).CopyToDataTable();

combobox2.DataTextField="Column2";
combobox2.DataValueField="Column1";
combobox2.DataSource = dt;

}

hope it helps.

manognya kota · Answer 2 · 2012-09-10T19:06:00

Solution 2

Hi,

Check this out.
http://social.msdn.microsoft.com/Forums/eu/csharplanguage/thread/b888969e-bb8e-44e3-a83d-b576425c4e13[^]

Hope this helps.

Posted 10-Sep-12 19:06pm

manognya kota