delete.aspx.cs

毕业设计——在线视频点播系统 内容很全

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.IO;
namespace gllbysj
{
	/// <summary>
	/// delete 的摘要说明。
	/// </summary>
	public class delete : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataGrid DataGrid1;
		protected System.Web.UI.WebControls.TextBox TextBox1;
		protected System.Web.UI.WebControls.DropDownList DropDownList1;
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.Label Label2;
		protected System.Web.UI.WebControls.ImageButton ImageButton1;
		protected System.Web.UI.WebControls.Label Label3;
	public	int page;
	
		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(!this.IsPostBack)
			{
				this.bind();
				Session["seach"]=0;
			}
//this.DataGrid1_DeleteCommand

		}
		public void bind()
		{
			SqlConnection con=db.createcon();
			con.Open();
			SqlDataAdapter sda=new SqlDataAdapter();
			sda.SelectCommand=new SqlCommand("select * from mess",con);
			DataSet ds=new DataSet();
			sda.Fill(ds);
			this.DataGrid1.DataSource=ds;
			this.DataGrid1.DataBind();
			con.Close();
			this.Label2.Text="共有影片"+ds.Tables[0].Rows.Count.ToString()+"部！";
			int count=Convert.ToInt32(ds.Tables[0].Rows.Count.ToString());
			int pagesize=(count+1)/5;
			//Response.Write(pagesize);
			Session["count2"]=pagesize;
			this.Label3.Text="当前位置：影片管理";

		}

		#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.ItemCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_ItemCommand);
			this.DataGrid1.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.DataGrid1_PageIndexChanged_1);
			this.TextBox1.TextChanged += new System.EventHandler(this.TextBox1_TextChanged);
			this.ImageButton1.Click += new System.Web.UI.ImageClickEventHandler(this.ImageButton1_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion



		private void ImageButton1_Click(object sender, System.Web.UI.ImageClickEventArgs e)
		{
			//try
			//{
			this.DataGrid1.CurrentPageIndex=0;
              this.sbind();


				Session["seach"]="1";
			//}
			//catch
			//{
			//	this.bind();
			//}


		}
		public void sbind()
		{
			SqlConnection con=db.createcon();
			con.Open();
			string a=this.TextBox1.Text;
			string b=this.DropDownList1.SelectedItem.Text;
			string str1="select * from mess where name like '%"+a+"%'";
			string str2="select * from mess where id="+a;
			string str3=str1;
			SqlDataAdapter sda=new SqlDataAdapter();
			if(b=="ID号") 			  
			{   			
				str3=str2;
			}
			sda.SelectCommand=new SqlCommand(str3,con);
			DataSet ds=new DataSet();
			sda.Fill(ds);
			this.DataGrid1.DataSource=ds;
			this.DataGrid1.DataBind();
			con.Close();
			this.Label2.Text="共有"+ds.Tables[0].Rows.Count.ToString()+"个结果";
			string count1=ds.Tables[0].Rows.Count.ToString();
			Session["count2"]=count1;
			this.Label3.Text="当前位置：影片管理";
		}
		public void checkall()
		{
			CheckBox cb=new CheckBox();
			int i,j=this.DataGrid1.Items.Count;
			
            
			for(i=0;i<j;i++)
			{
				
				cb=(CheckBox)this.DataGrid1.Items[i].FindControl("checkbox1");
				cb.Checked=true;
			}
			
		}
		private void delall()
		{
			CheckBox cbb=new CheckBox();
				
			string ss=null;
			int k=0;
			

			
			int i,j=this.DataGrid1.Items.Count;
			for(i=0;i<j;i++)

			{   			
				
				cbb = (CheckBox)DataGrid1.Items[i].Cells[0].FindControl("checkbox1");
				if(cbb.Checked)
				{
					
					string s=this.DataGrid1.Items[i].Cells[1].Text;
					k++;
					  ss+=","+s;
				

			
				}
				


			}          
					
       
          string id;//
		string del;//
		    	
              int len=ss.Length; 
			// Response.Write("进入循环体：");
 
			int []a=new int [100];
		 int kk,sj=0,nl=0,x=1;
			for(kk=0;kk<len;)
			{//Response.Write("执行第"+x+"循环");
                   x++;
				id=ss.Substring(0,1);
				//Response.Write("id");
				if (id==","||id=="")
				{
					id=ss.Substring(0,1);
					//Response.Write(id);
					del=ss.Remove(0,1);//
                  
					ss=del;
					//Response.Write(ss);
					len--;
					if(nl!=0)
					{
						a[sj]=nl;
						sj=sj+1;
						nl=0;
						kk=0;
					}
					
					
				}
				else
				{	
					
					nl=nl*10+Convert.ToInt32(id);
				
					del=ss.Remove(0,1);
					ss=del;
				
					len--;
					kk=0;

				}
				
			}

                 a[sj]=nl;
				
           int T;	
			try
			{
				for(T=0;T<=sj;T++)
				{
			        
					SqlConnection con=db.createcon();
					con.Open();
					SqlCommand cmm=new SqlCommand("delete from mess where id='"+a[T]+"'",con);
					cmm.ExecuteNonQuery();
					con.Close();

					//Response.Write("第"+(T+1)+"数"+a[T]);
				}
				this.Label1.Text="删除成功";
				this.bind();
			}
			catch
			{
				this.bind();
			}
				
		}

		private void DataGrid1_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			switch(e.CommandName)
			{
				case "checkall":
					this.DataGrid1.CurrentPageIndex=0;
					checkall();
					break;
				case "deleteall":				
                     delall();
				this.DataGrid1.CurrentPageIndex=0;

					break;	
					    

			}
		}

		private void DataGrid1_PageIndexChanged_1(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
		{
	      //int aa=Convert.ToInt32(Session["count2"].ToString());
		//	int page1=(aa+1)/5;
			this.DataGrid1.CurrentPageIndex=e.NewPageIndex;
			/*if(this.DataGrid1.CurrentPageIndex<0)
			{
				this.DataGrid1.CurrentPageIndex=0;
			}
			if(this.DataGrid1.CurrentPageIndex==aa)
			{
				this.DataGrid1.CurrentPageIndex=this.DataGrid1.CurrentPageIndex;
			}*/

			
			/*if((this.DataGrid1.SelectedIndex==0)&&this.DataGrid1.Items.Count==1)
			{
				if(this.DataGrid1.CurrentPageIndex>0)
				{
                       this.DataGrid1.CurrentPageIndex=this.DataGrid1.CurrentPageIndex-1;
				}
				
			}*/
			if(Session["seach"]=="1")
			{
				this.sbind();
			}
			else
			{
				this.bind();


			}
		}

		private void TextBox1_TextChanged(object sender, System.EventArgs e)
		{
		
		}

	}
}