Creating Custom Parameter Objects : ObjectDataSource « ADO.net Database « ASP.Net






  1. ASP.Net
  2. ADO.net Database
  3. ObjectDataSource

Creating Custom Parameter Objects


File: UsernameParameter.cs

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace MyControls
{
    public class UsernameParameter : Parameter
    {
        protected override object Evaluate(HttpContext context, Control control)
        {
            if (context != null)
                return context.User.Identity.Name;
            else
                return null;
        }
    }
}

            
File: Default.aspx

<%@ Page Language="C#" %>
<%@ Register TagPrefix="custom" Namespace="MyControls" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
   "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Show Username Parameter</title>
</head>
<body>
    <form id="form1" runat="server">
    <asp:FormView
        id="frmGuestbook"
        DataSourceID="srcGuestbook"
        DefaultMode="Insert"
        Runat="server">
        <InsertItemTemplate>
        <asp:Label
            ID="lblComment"
            Text="Comment:"
            AssociatedControlID="txtComment"
            Runat="server" />
        <asp:TextBox
            id="txtComment"
            Text='<%# Bind("comment") %>'
            TextMode="MultiLine"
            Columns="50"
            Rows="4"
            Runat="server" />
        <asp:Button
            id="btnInsert"
            Text="Add Entry"
            CommandName="Insert"
            Runat="server" />
        </InsertItemTemplate>
    </asp:FormView>
    <asp:GridView
        id="grdGuestbook"
        DataSourceID="srcGuestbook"
        CssClass="guestbook"
        Runat="server" />
    <asp:ObjectDataSource
        id="srcGuestbook"
        TypeName="YourDataSource"
        SelectMethod="Getter"
        Runat="server">
        <InsertParameters>
            <custom:UsernameParameter name="username" />
        </InsertParameters>
    </asp:ObjectDataSource>
    </form>
</body>
</html>








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