Help filling gridview from a stored procedure - asp.net

Question

I am trying to execute a stored procedure and place the information in a datagrid(without using the .net wizard) i want to do it manually. Using ado.net i believe. I am using vb.net and asp.net
Public cmd As New SqlCommand()
Public saoda As New SqlDataAdapter(cmd)
Public conn As New SqlConnection(" ")
Dim saods As New DataSet
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim reader As SqlDataReader
cmd.Parameters.AddWithValue("#yeartoget", DropDownList1.SelectedValue)
cmd.CommandText = "casof"
cmd.CommandType = CommandType.StoredProcedure
cmd.Connection = conn
conn.Open()
reader = cmd.ExecuteReader()
' Data is accessible through the DataReader object here.
GridView1.DataSource = saods
saoda.FillSchema(saods, SchemaType.Mapped)
GridView1.DataBind()
conn.Close()
End Sub
End Class
vvvvv
Dim pctofsales As New DataColumn
pctofsales = New DataColumn("PCTofsales", GetType(Decimal))
pctofsales.Expression = "IIF([YEsales] = 0, 0, [ASOFSales] / [YEsales])"
saods1.Tables("salesasoftable").Columns.Add(pctofsales)

Answer 1

You don't need to bind a DataSet to a GridView - a SqlDataReader will suffice. That is, you could use the following:
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim reader As SqlDataReader
cmd.Parameters.AddWithValue("#yeartoget", DropDownList1.SelectedValue)
cmd.CommandText = "casof"
cmd.CommandType = CommandType.StoredProcedure
cmd.Connection = conn
conn.Open()
reader = cmd.ExecuteReader()
GridView1.DataSource = reader
GridView1.DataBind()
conn.Close()
End Sub
However, if you want/need to use a DataTable, that's no big deal, either. The following snippet loads a reader into a DataTable:
Dim reader As SqlDataReader
cmd.Parameters.AddWithValue("#yeartoget", DropDownList1.SelectedValue)
cmd.CommandText = "casof"
cmd.CommandType = CommandType.StoredProcedure
cmd.Connection = conn
conn.Open()
reader = cmd.ExecuteReader()
Dim myTable As DataTable = New DataTable()
myTable.Load(reader)
GridView1.DataSource = dt
GridView1.DataBind()
conn.Close()
Happy Programming!