usermanage.aspx.cs

投票系统模块设计

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using Business;
using Common;

namespace book07
{
	/// <summary>
	/// UserManage 的摘要说明。
	/// </summary>
	public class UserManage : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataGrid dgUser;

		#region Properties

		/// <summary>
		/// 当前登录用户名
		/// </summary>
		public string Username
		{
			get
			{
				if (HttpContext.Current.User.Identity.IsAuthenticated)
				{
					return HttpContext.Current.User.Identity.Name;
				}
				else
				{
					return "anonymous";
				}
			}
		}

		#endregion

		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			if (!IsPostBack)
			{
				BindGrid();
			}
		}

		/// <summary>
		/// 数据绑定
		/// </summary>
		private void BindGrid()
		{
			dgUser.DataSource = Forum.GetAllUsers(Username);
			dgUser.DataBind();
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.dgUser.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.dgUser_PageIndexChanged);
			this.dgUser.CancelCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgUser_CancelCommand);
			this.dgUser.EditCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgUser_EditCommand);
			this.dgUser.UpdateCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgUser_UpdateCommand);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void dgUser_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			int index = e.Item.ItemIndex;

			//进入编辑状态
			dgUser.EditItemIndex = index;
			BindGrid();

			//动态加载下拉列表
			DropDownList ddl = (DropDownList)(dgUser.Items[index].Cells[2].FindControl("ddlRoles"));
			if (ddl != null)
			{
				ddl.DataSource = Forum.GetAllRoles(Username).Tables[0].DefaultView;
				ddl.DataTextField = "name";
				ddl.DataValueField = "id";
				ddl.DataBind();

				//默认选中现在的角色
				string strUsername = ((DataSet)(dgUser.DataSource)).Tables[0].Rows[index]["rolename"].ToString();
				for (int i = 0;i < ddl.Items.Count;i++)
				{
					if (strUsername == ddl.Items[i].Text)
					{
						ddl.SelectedIndex = i;
					}
				}
			}
		}

		private void dgUser_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			dgUser.EditItemIndex = -1;
			BindGrid();
		}

		private void dgUser_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
		{
			dgUser.CurrentPageIndex = e.NewPageIndex;
			BindGrid();
		}

		private void dgUser_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			int index = e.Item.ItemIndex;
			//获取被修改的用户信息
			User user = new User();
			DropDownList ddl = (DropDownList)dgUser.Items[index].Cells[2].FindControl("ddlRoles");
			user.username = Forum.GetAllUsers(Username).Tables[0].Rows[index + dgUser.PageCount * dgUser.CurrentPageIndex]["username"].ToString();
			user.role_id = Convert.ToInt32(ddl.SelectedValue);

			//修改用户角色
			if (!Forum.ModifyUser(user, Username))
				Response.Write("<script>alert('您没有权限修改该用户的角色');</script>");

			dgUser.EditItemIndex = -1;
			BindGrid();
		}


	}
}