admin_user.aspx.cs

这个是用vc编写的新闻管理系统

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;
using System.Configuration;
namespace WebNews.admin
{
	/// <summary>
	/// admin_user 的摘要说明。
	/// </summary>
	public class admin_user : System.Web.UI.Page
	{	
		string con=ConfigurationSettings.AppSettings["dsn"];	//取得DSN字符
		public DataSet ds=new DataSet();
		DataRow dr;
		public string	userclass;
		public string oldusername;
		
		protected System.Web.UI.WebControls.DataGrid MyDataGrid;
	    protected System.Web.UI.WebControls.TextBox UserName;
		protected System.Web.UI.WebControls.Label myLabel;
		protected System.Web.UI.WebControls.TextBox PassWord;
		protected System.Web.UI.WebControls.DropDownList UserClass;
		protected System.Web.UI.WebControls.TextBox Remark;
		protected System.Web.UI.WebControls.Label lblCurrentIndex;
		protected System.Web.UI.WebControls.LinkButton btnFirst;
		protected System.Web.UI.WebControls.LinkButton LinkButton2;
		protected System.Web.UI.WebControls.LinkButton LinkButton1;
		protected System.Web.UI.WebControls.LinkButton LinkButton3;
		protected System.Web.UI.WebControls.Label lblPageCount;

		private void Page_Load(object sender, System.EventArgs e)
		{
			if(! Page.IsPostBack)
			{
				string userclass;
				userclass=(string)Session["userclass"];
				if(userclass.Trim()=="系统管理员")
				{
					getAdmin();
				}
				else Page.Visible=false;
			}
			// 在此处放置用户代码以初始化页面
		}
		private void getAdmin()	   //填充DataGrid
		{
			try
			{	 
				//连接字符串
				SqlConnection  conn = new SqlConnection(con);//连接字符串
				conn.Open();
	　　   　　 
				SqlDataAdapter myCommand = new SqlDataAdapter();　　//创建SqlDataAdapter 类
			　	myCommand.SelectCommand=new SqlCommand("sp_selAdminAll",conn);
				myCommand.SelectCommand.CommandType=CommandType.StoredProcedure ;
			  //  DataSet ds=new DataSet();
					//建立并填充数据集
				myCommand.Fill(ds,"Admin");
		　　　　
				MyDataGrid.DataSource=ds;			 //绑定DataList
				MyDataGrid.DataBind();
			
				lblCurrentIndex.Text="第"+((Int32)MyDataGrid.CurrentPageIndex+1)+"页";
				lblPageCount.Text="/共"+MyDataGrid.PageCount+"页";
				conn.Close();
			}
			catch(SqlException e)
			{
				Response.Write("Exception in Main: " + e.Message);	//出错处理
			}

		}

		public string show(object a,object b)
		{   string d=a.ToString();
			string c=a+"(<a href=admin_popedom.aspx?username="+b+">修改权限</a></font>)"; 
			if(d.Trim()=="系统管理员")
			{
				return d;
			}
			else 
			{
			  return c;
			}
		}

		public	void PagerButtonClick(Object sender, EventArgs e)		//分页显示
		{
			//获得LinkButton的参数值
			string arg = ((LinkButton)sender).CommandArgument;

			switch(arg)
			{
				case ("next"):
					if (MyDataGrid.CurrentPageIndex < (MyDataGrid.PageCount - 1))
						MyDataGrid.CurrentPageIndex ++;
					break;
				case ("prev"):
					if (MyDataGrid.CurrentPageIndex > 0)
						MyDataGrid.CurrentPageIndex --;
					break;
				case ("last"):
					MyDataGrid.CurrentPageIndex = (MyDataGrid.PageCount - 1);
					break;
				case("first"):
					MyDataGrid.CurrentPageIndex =0;
					break;
			}
			getAdmin();
		}
		#region Web Form Designer generated code
		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.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

	

		public void MyDataGrid_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{	 
			 this.MyDataGrid.EditItemIndex = e.Item.ItemIndex;
			 
			getAdmin();
			
			dr=ds.Tables["Admin"].Rows[MyDataGrid.EditItemIndex]  ;  //取得popedom字段
			userclass=(string)dr["userclass"];
			userclass=userclass.Trim();
			oldusername=(string)dr["username"];
			oldusername=oldusername.Trim();
			Session["oldusername"]=oldusername;
		
			
			
			
		}

		public void MyDataGrid_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			 this.MyDataGrid.EditItemIndex = -1;
			
			 getAdmin();
		}
	

		public void MyDataGrid_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			if(Page.IsValid)
			{
				try
				{
					SqlConnection  myConnection = new SqlConnection(con);//连接字符串
					myConnection.Open();
			
					TextBox Username=(TextBox)e.Item.Cells[1].Controls[1];				//取得DataGrid中的控件值
					TextBox Password=(TextBox)e.Item.Cells[2].Controls[1];
					DropDownList Userclass=(DropDownList)e.Item.Cells[3].Controls[1];
					TextBox Remark=(TextBox)e.Item.Cells[4].Controls[1];
					string dr=Username.Text;
					dr=dr.Trim();
					string de=(string)Session["oldusername"];
					de=de.Trim();
					if(de==dr)
					{
						SqlCommand updateAdmin=new SqlCommand("sp_updateAdmin",myConnection);   //通过存储过程更新
						updateAdmin.CommandType=CommandType.StoredProcedure;
						SqlParameter id=updateAdmin.Parameters.Add("@id",SqlDbType.BigInt );			   //参数设定
						SqlParameter username=updateAdmin.Parameters.Add("@username",SqlDbType.Char,40);
						SqlParameter password=updateAdmin.Parameters.Add("@password",SqlDbType.Char,40);
						SqlParameter userclass=updateAdmin.Parameters.Add("@userclass",SqlDbType.Char,40);
						SqlParameter remark=updateAdmin.Parameters.Add("@remark",SqlDbType.Char,200);

						id.Value=this.MyDataGrid.DataKeys[(int)e.Item.ItemIndex] ;		   //获得参数的值
						username.Value=Username.Text.Trim() ;
						password.Value=Password.Text.Trim() ;
						userclass.Value=Userclass.SelectedItem.Text.Trim();
						remark.Value=Remark.Text.Trim() ;

						int rt=updateAdmin.ExecuteNonQuery();	//更新
						if(rt>0)
						{
							myLabel.Text="更新成功！";
				
							MyDataGrid.EditItemIndex = -1;		//回到编辑状态
							myConnection.Close();
							getAdmin();								  
						}
						else
						{
							myLabel.Text="更新错误！";
							myConnection.Close();
						}   
					}
					else
					{
						SqlCommand validateAdmin=new SqlCommand("sp_addAdminValidate",myConnection);
						validateAdmin.CommandType=CommandType.StoredProcedure;
						SqlParameter vlaidateUsername=validateAdmin.Parameters.Add("@username",SqlDbType.Char,40);
						vlaidateUsername.Value=Username.Text;
						SqlDataReader validateReader=validateAdmin.ExecuteReader();
						if(validateReader.Read()==true)
						{
							myLabel.Text="已有此用户名，请重新输入一个！！";
							validateReader.Close();
							myConnection.Close();
						}
					
						else
						{
							validateReader.Close();
							SqlCommand updateAdmin=new SqlCommand("sp_updateAdmin",myConnection);   //通过存储过程更新
							updateAdmin.CommandType=CommandType.StoredProcedure;
							SqlParameter id=updateAdmin.Parameters.Add("@id",SqlDbType.BigInt );			   //参数设定
							SqlParameter username=updateAdmin.Parameters.Add("@username",SqlDbType.Char,40);
							SqlParameter password=updateAdmin.Parameters.Add("@password",SqlDbType.Char,40);
							SqlParameter userclass=updateAdmin.Parameters.Add("@userclass",SqlDbType.Char,40);
							SqlParameter remark=updateAdmin.Parameters.Add("@remark",SqlDbType.Char,200);

							id.Value=this.MyDataGrid.DataKeys[(int)e.Item.ItemIndex] ;		   //获得参数的值
							username.Value=Username.Text ;
							password.Value=Password.Text ;
							userclass.Value=Userclass.SelectedItem.Text;
							remark.Value=Remark.Text ;

							int rt=updateAdmin.ExecuteNonQuery();	//更新
							if(rt>0)
							{
								myLabel.Text="更新成功！";
				
								MyDataGrid.EditItemIndex = -1;		//回到编辑状态
								myConnection.Close();
								getAdmin();								  
							}
							else
							{
								myLabel.Text="更新错误！";
								myConnection.Close();
							}   
						}
					}
				}
				catch(SqlException er)		 //出错处理
				{
					Response.Write("SqlException in Main: " + er.Message);
				}
		               
		}
		}

		
		public void MyDataGrid_SelectedIndexChanged(object sender,System.EventArgs e)
		{
			        
			getAdmin();
		}

			public void MyDataGrid_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
				
					try
					{
						SqlConnection conn=new SqlConnection(con);			//建立连接
						conn.Open();
						SqlCommand delAdmin=new SqlCommand("sp_delAdmin",conn);			//建立命令
						delAdmin.CommandType=CommandType.StoredProcedure;

						SqlParameter id=delAdmin.Parameters.Add("@id",SqlDbType.BigInt);
						id.Value=this.MyDataGrid.DataKeys[e.Item.ItemIndex] ;		   //获得参数的值
                        
						int r=delAdmin.ExecuteNonQuery();	  //删除
						if(r>0)
						{
							myLabel.Text="删除成功！";
							conn.Close();
							MyDataGrid.EditItemIndex = -1;	
							
							if(MyDataGrid.CurrentPageIndex>0)
							{

								MyDataGrid.CurrentPageIndex= MyDataGrid.CurrentPageIndex-1;
							}
							getAdmin();

						}
						else
						{
							myLabel.Text="删除错误！";
							conn.Close();
							MyDataGrid.EditItemIndex = -1;	
							
							getAdmin();

						}

					}
					catch(SqlException er)
					{ 
						Response.Write("SqlException in Main: " + er.Message);
					}

			

		
		    
		}

		}
	}