Simple DataGrid Sorting Demo

This demo shows how to create a DataGrid with bound columns that allows the user to sort two of the six columns. For this demo clicking on the name will not sort the row, but just indicate what row was clicked. Note that here the AutoGenerateColumns property is set to False. Hence, in order to specify the column(s) that can be sorted, you must set the SortExpression property in the BoundColumn control. (Furthermore, note that the value of this setting is what is passed to the sorting event handler as e.SortExpression.)

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Source Code 
<% @Import Namespace="System.Data" %>
<% @Import Namespace="System.Data.SqlClient" %>
<script language="vb" runat="server">
  Sub Page_Load(sender as Object, e as EventArgs)
    BindData()
  End Sub
	
	
  Sub BindData()
    '1. Create a connection
    Dim myConnection as New SqlConnection(ConfigurationSettings.AppSettings("connectionString"))

    '2. Create the command object, passing in the SQL string
    Const strSQL as String = "sp_Popularity"
    Dim myCommand as New SqlCommand(strSQL, myConnection)

    'Set the datagrid's datasource to the datareader and databind
    myConnection.Open()
    dgPopularFAQs.DataSource = myCommand.ExecuteReader(CommandBehavior.CloseConnection)
    dgPopularFAQs.DataBind()	
  End Sub
  
  Sub SortResults(sender as Object, e as DataGridSortCommandEventArgs)
	lblWhatClicked.Text = "You clicked: " & e.SortExpression
  End Sub
</script>

<form runat="server">
  <asp:label id="lblWhatClicked" runat="server" Font-Bold="True" />
  <p>
  <asp:DataGrid runat="server" id="dgPopularFAQs" 
                BackColor="#eeeeee" Width="85%"
                HorizontalAlign="Center"
                Font-Name="Verdana" CellPadding="4"
                Font-Size="10pt" AutoGenerateColumns="False"
                AllowSorting="True"
                OnSortCommand="SortResults">
    <HeaderStyle BackColor="Black" ForeColor="White" Font-Bold="True" HorizontalAlign="Center" />
    <AlternatingItemStyle BackColor="White" />
  
    <Columns>
      <asp:BoundColumn DataField="CatName" HeaderText="Category Name"  />
      <asp:BoundColumn DataField="Description" HeaderText="FAQ Description" />
      <asp:BoundColumn DataField="ViewCount" SortExpression="ViewCount" DataFormatString="{0:#,###}" 
             HeaderText="Views" ItemStyle-HorizontalAlign="Center" />
      <asp:BoundColumn DataField="SubmittedByName" HeaderText="Author"  />
      <asp:BoundColumn DataField="SubmittedByEmail" HeaderText="Author's Email"  />
      <asp:BoundColumn DataField="DateEntered" SortExpression="DateEntered" 
              HeaderText="Date Added"	DataFormatString="{0:MM-dd-yyyy}"  />    
    </Columns>
  </asp:datagrid>
</form>

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