managebook.aspx.cs

本系统为数据库课程设计

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 System.Data.SqlClient;

namespace mybook
{
	/// <summary>
	/// managebook 的摘要说明。
	/// </summary>
	public class managebook : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.LinkButton LinkButton1;
		protected System.Web.UI.WebControls.DataGrid DataGrid1;
	
		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)
			{
				SqlConnection conn = new SqlConnection("server=.;uid=sa;pwd=sa;database=mybook");
				conn.Open();

				SqlDataAdapter sda=new SqlDataAdapter();
				sda.SelectCommand = new SqlCommand("select * from xyadmin", conn);
				DataSet ds=new DataSet();
				sda.Fill(ds,"admin");

				this.DataGrid1.DataKeyField = "adminid";
				DataGrid1.DataSource=ds.Tables["admin"];
				DataGrid1.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.DataGrid1.EditCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_EditCommand);
			this.DataGrid1.UpdateCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_UpdateCommand);
			this.DataGrid1.DeleteCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_DeleteCommand);
			this.LinkButton1.Click += new System.EventHandler(this.LinkButton1_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void DataGrid1_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			int id = Convert.ToInt32(this.DataGrid1.DataKeys[e.Item.ItemIndex]);

			SqlConnection conn = new SqlConnection("server=.;uid=sa;pwd=sa;database=mybook");
			conn.Open();

			SqlCommand cmd = new SqlCommand("delete from xyadmin where adminid = '"+id+"'", conn);
			cmd.ExecuteNonQuery();

			SqlDataAdapter sda=new SqlDataAdapter();
			sda.SelectCommand = new SqlCommand("select * from xyadmin", conn);
			DataSet ds=new DataSet();
			sda.Fill(ds,"newadmin");

			DataGrid1.DataSource=ds.Tables["newadmin"];
			DataGrid1.DataBind();
		}

		private void DataGrid1_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			this.DataGrid1.EditItemIndex = e.Item.ItemIndex;

			SqlConnection conn = new SqlConnection("server=.;uid=sa;pwd=sa;database=mybook");
			conn.Open();

			SqlDataAdapter sda=new SqlDataAdapter();
			sda.SelectCommand = new SqlCommand("select * from xyadmin", conn);
			DataSet ds=new DataSet();
			sda.Fill(ds,"newadmin");

			DataGrid1.DataSource=ds.Tables["newadmin"];
			DataGrid1.DataBind();
		}

		private void DataGrid1_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			int id = Convert.ToInt32(this.DataGrid1.DataKeys[e.Item.ItemIndex]);
			string pwd = ((TextBox)(e.Item.Cells[2].Controls[0])).Text;
			Response.Write(pwd);

			SqlConnection conn = new SqlConnection("server=.;uid=sa;pwd=sa;database=mybook");
			conn.Open();

            SqlCommand cmd = new SqlCommand("update xyadmin set password = '"+pwd+"' where adminid = '"+id+"'",conn);
			cmd.ExecuteNonQuery();
			
            bind();
		}
		private void bind()
		{
			SqlConnection conn = new SqlConnection("server=.;uid=sa;pwd=sa;database=mybook");
			conn.Open();

			SqlDataAdapter sda=new SqlDataAdapter();
			sda.SelectCommand = new SqlCommand("select * from xyadmin", conn);
			DataSet ds=new DataSet();
			sda.Fill(ds,"nadmin");

			DataGrid1.DataSource=ds.Tables["nadmin"];
			DataGrid1.DataBind();
		}

		private void LinkButton1_Click(object sender, System.EventArgs e)
		{
			Response.Redirect("adminlist.aspx");
		}
	}
}