changeinformation.aspx.cs

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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 System.Data.SqlClient;

namespace WebNews
{
	/// <summary>
	/// ChangeInformation 的摘要说明。
	/// </summary>
	public class ChangeInformation : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Button BtnOk;
		protected System.Web.UI.WebControls.Label LabMessage;
		protected System.Web.UI.WebControls.TextBox TextUserName;
		protected System.Web.UI.WebControls.Label LabUserName;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			bool login = isLogin();
			if(login)
			{
			}
			else
			{
				this.LabUserName.Text = "尚未登录";
				Response.Redirect("Login.aspx");
			}


			if(Page.IsPostBack==false)
			{
				string userId = Session["userId"].ToString();

				SqlConnection conn = new SqlConnection();
				conn.ConnectionString = App_Data.ClassConnection.CONN_STRING;
				conn.Open();

				SqlCommand cmd = new SqlCommand("select * from users where userID='"+userId+"'",conn);
				SqlDataReader reader = cmd.ExecuteReader();

				if(reader.Read())
				{
					this.TextUserName.Text = reader.GetString(1).ToString();
				}

				reader.Close();
				conn.Close();
			}


		}

		#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.BtnOk.Click += new System.EventHandler(this.BtnOk_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		public bool isLogin()
		{
			string userId = Session["userId"].ToString();

			SqlConnection conn = new SqlConnection();
			conn.ConnectionString = App_Data.ClassConnection.CONN_STRING;
			conn.Open();
			SqlCommand cmd = new SqlCommand("select * from users where userID='"+userId+"'",conn);
			SqlDataReader reader = cmd.ExecuteReader();
			if(reader.Read())
			{
				this.LabUserName.Text = "您好，" + reader.GetString(1);
				reader.Close();
				return true;
			}
			else
			{
				reader.Close();
				return false;
			}
		}

		private void BtnOk_Click(object sender, System.EventArgs e)
		{
			string userId = Session["userId"].ToString();

			string userName = this.TextUserName.Text.Trim();
			//Response.Write(userName);

			SqlConnection conn = new SqlConnection();
			conn.ConnectionString = App_Data.ClassConnection.CONN_STRING;
			conn.Open();

			string sql = "update users set userName='"+userName+"' where userID='"+userId+"'";
			//Response.Write(sql);

			SqlCommand cmd = new SqlCommand(sql,conn);
			int a = cmd.ExecuteNonQuery();

			if(a >= 1)
			{
				this.LabMessage.Text = "修改成功";
			}
			else
			{
				this.LabMessage.Text = "修改失败";
			}

			conn.Close();
		}
	}
}