Grid view row count

Hi,

In my project we are replacing the grid view controls in to Rad Grid controls.

Please let me know how to implement the below code through the Rad Grid control.

for (int i = 0; i < gvEmployee.Rows.Count; i++)
{
employee = ((DropDownList)gvEmployee.Rows[i].FindControl("ddlEmployee")).SelectedValue;
for (int j = i + 1; j < gvEmployee.Rows.Count; j++)
{
if (string.Compare(employee, ((DropDownList)gvLOB.Rows[j].FindControl("ddlEmployee")).SelectedValue) == 0 && employee != "--SELECT--")
{
DoAlert("Please select distinct " + gvHeaderemployee);
return;
}
}
if (employee != "--SELECT--")
{
dtemployeelocal.Rows.Add(employee);
}
}

I need to check the distinct record added in my grid view on Submit button click event