void FilterByStaffirstName()
{
//create an instance
clsStaffCollection Staff = new clsStaffCollection();
//Pass the text box value through the filter method
Staff.FilterByStaffFirstName(txtMechanicStaffFilter.Text);
lstMechanicRepairs.DataSource = Staff.StaffList;
//Show the part required field in the list
lstMechanicRepairs.DataValueField = "StaffID";
//Show the part required field in the list
lstMechanicRepairs.DataTextField = "StaffFirstName";
//Bind the data to the list
lstMechanicRepairs.DataBind();
}