..............................
OleDbConnection conn = null;
switch(itemValue){
case itemValue1:
conn = new OleDbConnection("FileName="+System.Environment.CurrentDirectory+"filename1");
break;
case itemValue2:
conn = new OleDbConnection("FileName="+System.Environment.CurrentDirectory+"filename2");
break;
default:
break;
}
................
or
DataTable dt = SqlClientFactory.Instance.CreateDataSourceEnumerator().GetDataSources();