How to rebind grid view after update? - asp.net

Question

May I know how to rebind data to grid view table after update? Below is what I have tried so far:
Dim conn As New MySqlConnection
conn.ConnectionString = "server = localhost; user id = root; password = root; database = db_fyp"
Dim com As New MySqlCommand
Dim dt As New DataTable
Dim query As String
query = "update tblorder set OrderStatus = #OrderStatus where UserId = #UserId "
com = New MySqlCommand(query, conn)
com.Parameters.AddWithValue("#OrderStatus", tOrderStatus)
com.Parameters.AddWithValue("#UserId", Session("Username"))
conn.Open()
com.ExecuteNonQuery()
BindData()
conn.Close()
Here is my BindData function for insert data into grid view table. This part is working perfectly.
Private Sub BindData()
Dim conn As New MySqlConnection
conn.ConnectionString = "server = localhost; user id = root; password = root; database = db_fyp"
Dim com As New MySqlCommand
Dim dr As MySqlDataReader
Dim query As String
Dim dt As New DataTable
conn.Open()
query = "select FoodName, Qty, IngredientName, Quantity, OrderStatus from tblorder, tblorderdetail, tblfood, tblcustomizefooddetail, tblcustomizeingredient, tblordercustomize where UserId = #UserId and OrderStatus = #OrderStatus and tblorder.OrderId = tblorderdetail.OrderId and tblorderdetail.FoodId = tblfood.FoodId and tblorderdetail.OrderDetailId = tblordercustomize.OrderDetailId and tblfood.FoodId = tblcustomizefooddetail.FoodId and tblcustomizeingredient.IngredientId = tblcustomizefooddetail.IngredientId and tblordercustomize.IngredientId = tblcustomizeingredient.IngredientId"
com = New MySqlCommand(query, conn)
com.Parameters.AddWithValue("#UserId", Session("Username"))
com.Parameters.AddWithValue("#OrderStatus", "Pending")
dr = com.ExecuteReader
dt.Load(dr)
Session("OderTable") = dt
GridView1.DataSource = dt
GridView1.DataBind()
conn.Close()
End Sub

Answer 1

you already have a function to populate the grid, simply call it from within the updating code:
Dim conn As New MySqlConnection
conn.ConnectionString = "server = localhost; user id = root; password = root; database = db_fyp"
Dim com As New MySqlCommand
Dim dt As New DataTable
Dim query As String
query = "update tblorder set OrderStatus = #OrderStatus where UserId = #UserId "
com = New MySqlCommand(query, conn)
com.Parameters.AddWithValue("#OrderStatus", tOrderStatus)
com.Parameters.AddWithValue("#UserId", Session("Username"))
conn.Open()
com.ExecuteNonQuery()
conn.Close()
'you dont need all that
'dt.Load(????)
'GridView1.DataSource = dt
'GridView1.DataBind()
'just call this
BindData()