searchscore.aspx.cs

毕业设计题目,学生成绩查询系统,包括管理员和普通用户两级管理

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;

namespace StudentScroeQuery.Admin
{
	/// <summary>
	/// searchscore 的摘要说明。
	/// </summary>
	public class searchscore : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataGrid DataGrid1;
		protected System.Web.UI.WebControls.Button Button2;
		protected System.Web.UI.WebControls.TextBox txtcourse;
		protected System.Web.UI.WebControls.Button Button1;
		protected System.Web.UI.WebControls.TextBox txtnum;
		protected System.Web.UI.WebControls.RegularExpressionValidator RegularExpressionValidator1;
		protected System.Web.UI.WebControls.LinkButton LinkButton1;
		protected string searchcondition="";
		
		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(!Page.IsPostBack)
			{
				if(ViewState["Condition"]==null)
				{
					ViewState["Condition"]="";
				}
				 bindgrid(ViewState["Condition"].ToString());
			}
			
		}
		void bindgrid(string searchcondition)
		{
			if(searchcondition=="")
			{
				bindgrid();
				return;
			}	
				if(searchcondition==txtnum.Text)
				{
					bindgrid(Convert.ToInt32(searchcondition));
					return;
				}
				if(searchcondition==txtcourse.Text)
				{
					
					bindgrid1(searchcondition);
					return;
				}
				
			
		}
		void bindgrid()
		{
			this.DataGrid1.DataSource=new BLL.score_bll().get_allscores();
			this.DataGrid1.DataBind();
			
		}
		void bindgrid(int num)
		{
			
			
			this.DataGrid1.DataSource=new BLL.score_bll().getscore(num);
				this.DataGrid1.DataBind();
		
		}
		void bindgrid1(string course)
		{

			this.DataGrid1.DataSource=new BLL.score_bll().getscore(course);
			this.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.Button1.Click += new System.EventHandler(this.Button1_Click);
			this.Button2.Click += new System.EventHandler(this.Button2_Click);
			this.LinkButton1.Click += new System.EventHandler(this.LinkButton1_Click);
			this.DataGrid1.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.DataGrid1_PageIndexChanged);
			this.DataGrid1.CancelCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_CancelCommand);
			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.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Button1_Click(object sender, System.EventArgs e)
		{
			int num;
			if(this.txtnum.Text=="")
			{
				Response.Write("<script>alert('请输入一个学号!')</script>");
				return;
			}
			num=Convert.ToInt32(txtnum.Text);
			searchcondition=num.ToString();
			ViewState["Condition"]=searchcondition;
			bindgrid(ViewState["Condition"].ToString());
			

		}

		private void Button2_Click(object sender, System.EventArgs e)
		{
			string course="";
			if(txtcourse.Text=="")
			{
				Response.Write("<script>alert('请输入课程名称!')</script>");
				return;
			}
			course=txtcourse.Text;
			searchcondition=course;
			ViewState["Condition"]=searchcondition;
			bindgrid(ViewState["Condition"].ToString());
			
		}

		private void DataGrid1_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			this.DataGrid1.EditItemIndex=-1;
			searchcondition=ViewState["Condition"].ToString();
			bindgrid(ViewState["Condition"].ToString());
		}

		private void DataGrid1_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			int scoreid=Convert.ToInt32(this.DataGrid1.DataKeys[e.Item.ItemIndex]);
			try
			{
				new BLL.score_bll().del_score(scoreid);
				Response.Write("<script>alert('删除成功!')</script>");
				searchcondition=ViewState["Condition"].ToString();
				bindgrid(ViewState["Condition"].ToString());

			}
			catch
			{
				Response.Write("<script>alert('删除失败!')</script>");
			}
		}

		private void DataGrid1_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			
			this.DataGrid1.EditItemIndex=e.Item.ItemIndex;
			searchcondition=ViewState["Condition"].ToString();
			bindgrid(ViewState["Condition"].ToString());
		}

		private void DataGrid1_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			int scoreid=Convert.ToInt32(this.DataGrid1.DataKeys[e.Item.ItemIndex]);
			int score=Convert.ToInt32(((TextBox)e.Item.Cells[2].Controls[0]).Text);
			int stuid=new BLL.score_bll().getStuNum(scoreid);

			if(score>100 || score<0)
			{ 
				Response.Write("<script>alert('请输入一个0-100之间的数')</script>");
				return;
			}
			else
			{
			
				try
				{
					new BLL.score_bll().update_score(scoreid,score);
					this.DataGrid1.EditItemIndex=-1;
					searchcondition=ViewState["Condition"].ToString();
					bindgrid(ViewState["Condition"].ToString());
				
				}
				catch
				{
					Response.Write("更新失败!");
				}
			}

		}

		private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
		{
			this.DataGrid1.CurrentPageIndex=e.NewPageIndex;
			searchcondition=ViewState["Condition"].ToString();
			bindgrid(ViewState["Condition"].ToString());
		}

		private void LinkButton1_Click(object sender, System.EventArgs e)
		{
			bindgrid();
		}
	}
}