private bool DataSourceExists(DataSource ds)
{
bool dsexists = false;
foreach (TabItem ti in docGroup.Items)
{
if ((ti.Tag as DataSource).FileName.ToLower().Equals(ds.FileName.ToLower()) &&
(ti.Tag as DataSource).SheetName.ToLower().Equals(ds.SheetName.ToLower()) //29Apr2015 Sheetname
)
{
dsexists = true;
docGroup.SelectedItem = ti;
break;
}
}
return dsexists;
}