อยากทราบวิธีการสร้าง DataTable แบบ ไม่มี query จะสร้าง DataTable แบบไม่ queryแต่จะดึงข้อมูลมาจาก gridview ทำไงครับ

Dim dt As New DataTable
Dim dr As DataRow

'*** Column ***'
dt.Columns.Add("CustomerID")
dt.Columns.Add("Name")
dt.Columns.Add("Email")
dt.Columns.Add("CountryCode")
dt.Columns.Add("Budget")
dt.Columns.Add("Used")

'*** Rows ***'
dr = dt.NewRow
dr("CustomerID") = "C001"
dr("Name") = "Win Weerachai"
dr("Email") = "[email protected]"
dr("CountryCode") = "TH"
dr("Budget") = "1000000"
dr("Used") = "600000"
dt.Rows.Add(dr)

'*** Rows ***'
dr = dt.NewRow
dr("CustomerID") = "C002"
dr("Name") = "Win Weerachai"
dr("Email") = "[email protected]"
dr("CountryCode") = "TH"
dr("Budget") = "1000000"
dr("Used") = "600000"
dt.Rows.Add(dr)

         ' Create a table to store data for the DropDownList control.
         Dim dt As DataTable = New DataTable()

         ' Define the columns of the table.
         dt.Columns.Add(new DataColumn("ColorTextField", GetType(String)))
         dt.Columns.Add(new DataColumn("ColorValueField", GetType(String)))

         ' Populate the table with sample values.
         dt.Rows.Add(CreateRow("White", "White", dt))
         dt.Rows.Add(CreateRow("Silver", "Silver", dt))
         dt.Rows.Add(CreateRow("Dark Gray", "DarkGray", dt))
         dt.Rows.Add(CreateRow("Khaki", "Khaki", dt))
         dt.Rows.Add(CreateRow("Dark Khaki", "DarkKhaki", dt))