Thursday, February 07, 2008 2.0 Roles DropDownList Control in C#

Translation of this post to french at :

This is a user control, which encapsulates a DropDownList, an ObjectDataSource and custom, simplified roles class. The user control will connect automatically (of course), with the aspnetdb database pointed to in the web.config
for users, here's a nice converter provided by Telerik ( ) :

Here's the code for the user control :

<%@ Control Language="C#" AutoEventWireup="true" CodeFile=" ddlRoles.ascx.cs" Inherits="RoleControl" %>
<asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="sourceRoles" DataTextField="RoleName"
DataValueField="RoleName" Width="185px">
<asp:ObjectDataSource ID="sourceRoles" runat="server" SelectMethod="GetRoles"

Code behind for the user control:

using System;

public partial class RoleControl : System.Web.UI.UserControl
public String SelectedValue
get { return this.DropDownList1.SelectedValue; }
set { this.DropDownList1.SelectedValue = value; }

The object datasource uses the class below :

using System;
using System.Web.Security;
using System.Collections.Generic;

public class CustomRoles
private string mRoleName;

public string RoleName
get { return mRoleName; }
set { mRoleName = value; }

/// <summary>
/// this function, loops through all roles in the database, and builds
/// a collection of CustomRoles instances into a generic list of CustomRoles
/// then we return the list as the source for the dropdown.
/// The RoleName property is used to bind the datavaluefield and datatextfield
/// in the dropdownlist
/// </summary>
/// <returns></returns>
public List<CustomRoles> GetRoles()
string[] roleslist = Roles.GetAllRoles();

int i = 0;
//instance of customroles
CustomRoles br;

//create the list (or collection of CustomRoles instances)
List<CustomRoles> lstbr = new List<CustomRoles>();

//fill the list by looping through the array of strings
foreach (string brole in roleslist)
br = new CustomRoles();
br.RoleName = brole;

return lstbr;



Comments are welcome !


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