adminstusearch.aspx.cs

学生成绩管理系统 vb.net+数据库

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 GradeMis
{
	/// <summary>
	/// AdminStuSearch 的摘要说明。
	/// </summary>
	public class AdminStuSearch : System.Web.UI.Page
	{
		private SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["GradeSys"]);
		protected System.Web.UI.WebControls.Button Button1;
		protected System.Web.UI.WebControls.TextBox txtsid;
		protected System.Web.UI.WebControls.TextBox txtname;
		protected System.Web.UI.WebControls.TextBox txtage;
		protected System.Web.UI.WebControls.TextBox txtx;
		protected System.Web.UI.WebControls.TextBox txty;
		protected System.Web.UI.WebControls.RangeValidator RangeValidator1;
		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(!Page.IsPostBack)
			{
				GetStuData();
			}
		}


		#region
		private void GetStuData()
		{
			string sql = string.Empty;
			sql = GetSql();
			SqlDataAdapter da = new SqlDataAdapter(sql,conn);
			DataSet ds = new DataSet();
			try
			{
				da.Fill(ds,"t");
				this.DataGrid1.DataSource = ds.Tables["t"];
				this.DataGrid1.DataBind();
			}
			catch
			{}
		}
		#endregion


		#region
		private string GetSql()
		{
			string sql = string.Empty;
			ArrayList   sqlArr= new ArrayList();

			if(this.txtsid.Text.Length!=0)
			{
				sqlArr.Add(string.Format("学号 like '%{0}%' ",this.txtsid.Text.ToString()));
			}
			if(this.txtname.Text.Length!=0)
			{
				sqlArr.Add(string.Format("姓名 like '%{0}%' ",this.txtname.Text.ToString()));
			}
			if(this.txtage.Text.Length!=0)
			{
				sqlArr.Add(string.Format("年龄 like '%{0}%' ",this.txtage.Text.ToString()));
			}
			if(this.txtx.Text.Length!=0)
			{
				sqlArr.Add(string.Format("所有院系 like '%{0}%' ",this.txtx.Text.ToString()));
			}
			if(this.txty.Text.Length!=0)
			{
				sqlArr.Add(string.Format("入学年份 like '%{0}%' ",this.txty.Text.ToString()));
			}
			foreach(string str in sqlArr)
			{
				sql= sql +str +" and " ;
				
			}
			sql="select * from 学生信息表 where " +sql;
			int i=sql.Trim().Length-5;
			sql=sql.Substring(0,i);
			return sql;
		}
		#endregion


		#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.DataGrid1.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.DataGrid1_PageIndexChanged);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Button1_Click(object sender, System.EventArgs e)
		{
			GetStuData();
		}

		private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
		{
			this.DataGrid1.CurrentPageIndex = e.NewPageIndex;
			GetStuData();
		}
	}
}