gridview having more than one bind method

See more:

C#

i am doing location-city-state-country page.in location page i have 3 dropdowns and based on the values selected in dropdown list data to the gridview is binded.for that i use follwing method

public void fillgrid()
       {
           Int32 country_id = Convert.ToInt32(ddcountry.SelectedValue == "" ? "0" : ddcountry.SelectedValue);
           Int32 state_id = Convert.ToInt32(ddstate.SelectedValue == "" ? "0" : ddstate.SelectedValue);
           Int32 city_id = Convert.ToInt32(ddcity.SelectedValue == "" ? "0" : ddcity.SelectedValue);
           Common obj = new Common();
           DataSet ds = obj.BindingGridview(country_id, state_id, city_id);
           gvlocation.DataSource = ds;
           gvlocation.DataBind();
       }

i have also a search button and i bind the gridview based on value in search textbox.for that i use follwing code

public void BindGV(string locationname)
     {

         Common obj = new Common();
         locationname = "%" + locationname + "%";
         DataSet ds = obj.GetAllLocation(locationname);
         gvlocation.DataSource = ds.Tables[0];
         gvlocation.DataBind();

     }

The problem is that i can bind only one method to gridview during edit/update/delete.normally i select first method.but when i press edit button of gridview which shows search Result, it causes problem .
protected void gvlocation_RowEditing(object sender, GridViewEditEventArgs e)
{
gvlocation.EditIndex = e.NewEditIndex;
fillgrid();
}