Question

I have a stored procedure that returns multiple recordsets. It can be 1 recordset, 2 recordsets, or more. I don’t know how many RS will come back.

Here at stackoverflow I found the below sample

    Dim conn As New SqlConnection(ConfigurationManager.ConnectionStrings("myConnection").ConnectionString)
    Dim cmd As New SqlCommand
    Dim Reader As SqlDataReader
    cmd.Connection = conn
    cmd.Parameters.AddWithValue("@ACTNbr", tbACTNbr.Text.ToString.Trim)
    cmd.Parameters.AddWithValue("@WTHNbr", tbWTHNbr.Text.ToString.Trim)
    cmd.CommandText = "sp_search_def"
    cmd.CommandType = CommandType.StoredProcedure
    conn.Open()
    Reader = cmd.ExecuteReader()
'The next part is what I found here at stackoverflow
While Reader.Read() OrElse (Reader.NextResult() And Reader.Read())
  For i As Integer = 0 To Reader.FieldCount - 1
    Response.Write(Reader(i).ToString())
    Response.Write(" ")
  Next
  Response.Write("<br />")
End While

The above response.write‘s show the data I need perfectly. But I need to put that into a Gridview. i.e. I need to put the results of the stored procedure (and all of its result sets) into one gridview.

My gridview is set to AutoGenerateColumns = "true".

I’ve tried:

myGridview.DataSource = Reader
myGridview.DataBind()

And of course I only get one of the recordsets.

The results of the stored procedure are all formatted the same – same number of columns, headers, and so on.

Can somebody point me in the right direction? I’ve been trying to figure this out, but give up and now I am asking here.

I am new to this.

Thank you.

Answer 1

Use DataAdapter to fill DataSet instead of DataReader, that you can easily bind to your gridview as shown below:

    Dim DS As DataSet
    Dim MyConnection As SqlConnection
    Dim MyDataAdapter As SqlDataAdapter

    'Create a connection to the SQL Server.
    MyConnection = New SqlConnection("server=(local);database=pubs;Trusted_Connection=yes")

    'Create a DataAdapter, and then provide the name of the stored procedure.
    MyDataAdapter = New SqlDataAdapter("GetAuthorsByLastName", MyConnection)

    'Set the command type as StoredProcedure.
    MyDataAdapter.SelectCommand.CommandType = CommandType.StoredProcedure

    'Create and add a parameter to Parameters collection for the stored procedure.
    MyDataAdapter.SelectCommand.Parameters.Add(New SqlParameter("@au_lname", _
   SqlDbType.VarChar, 40))

    'Assign the search value to the parameter.
    MyDataAdapter.SelectCommand.Parameters("@au_lname").Value = Trim(txtLastName.Text)

    'Create and add an output parameter to Parameters collection. 
    MyDataAdapter.SelectCommand.Parameters.Add(New SqlParameter("@RowCount", _
    SqlDbType.Int, 4))

    'Set the direction for the parameter. This parameter returns the Rows returned.
    MyDataAdapter.SelectCommand.Parameters("@RowCount").Direction = ParameterDirection.Output

    DS = New DataSet() 'Create a new DataSet to hold the records.
    MyDataAdapter.Fill(DS, "AuthorsByLastName") 'Fill the DataSet with the rows returned.

    'Get the number of rows returned, and then assign it to the Label control.
    'lblRowCount.Text = DS.Tables(0).Rows.Count().ToString() & " Rows Found!"
    lblRowCount.Text = MyDataAdapter.SelectCommand.Parameters(1).Value & " Rows Found!"

    'Set the data source for the DataGrid as the DataSet that holds the rows.
    Grdauthors.DataSource = DS.Tables("AuthorsByLastName").DefaultView

    'Bind the DataSet to the DataGrid. 
    'NOTE: If you do not call this method, the DataGrid is not displayed!
    Grdauthors.DataBind()

    MyDataAdapter.Dispose() 'Dispose of the DataAdapter.
    MyConnection.Close() 'Close the connection.

How to call SQL Server stored procedures in ASP.NET by using Visual Basic .NET