st_course.aspx.cs

学生管理系统（asp.net+sql server）

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
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.Configuration;

namespace STGROUP
{
	/// <summary>
	/// course 的摘要说明。
	/// </summary>
	public class ST_course : System.Web.UI.Page
	{
	    SqlConnection st_conn;
		protected System.Web.UI.WebControls.DataGrid st_dtg_course;
		protected System.Web.UI.WebControls.TextBox st_tbx_name;
		protected System.Web.UI.WebControls.TextBox st_tbx_id;
		protected System.Web.UI.WebControls.Button st_btn_search;
		protected System.Web.UI.WebControls.Label st_lbl_note;
		protected System.Web.UI.WebControls.Button st_btn_exit;
		string st_sqlstr;
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			string st_connstr= ConfigurationSettings.AppSettings["st_dbconn"];
			st_conn=new SqlConnection(st_connstr);	
			if(!IsPostBack) 
				ST_BindGrid();
		}

		#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.st_btn_search.Click += new System.EventHandler(this.st_btn_search_Click);
			this.st_btn_exit.Click += new System.EventHandler(this.st_btn_exit_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion
		public void DataGrid_Page(object sender,DataGridPageChangedEventArgs e)
		{
			st_dtg_course.CurrentPageIndex=e.NewPageIndex;
			ST_BindGrid();
		}
		public void DataGrid_edit(object sender,DataGridCommandEventArgs e)
		{
			
			st_dtg_course.EditItemIndex=(int)e.Item.ItemIndex;
			ST_BindGrid();
			
		}
		public void DataGrid_cancel(object sender,DataGridCommandEventArgs e)
		{
			
			st_dtg_course.EditItemIndex=-1;
			ST_BindGrid();
			
		}
		public void DataGrid_delete(object sender,DataGridCommandEventArgs e)
		{
			
			string st_sqlstr="delete from ST_course where ST_Course_id=@course_id";
			SqlCommand st_comm=new SqlCommand(st_sqlstr,st_conn);
			st_comm.Parameters.Add(new SqlParameter("@course_id",SqlDbType.VarChar,50));
			st_comm.Parameters["@course_id"].Value=st_dtg_course.DataKeys[(int)e.Item.ItemIndex];
			st_comm.Connection.Open();
			try
			{
				st_comm.ExecuteNonQuery();
				st_lbl_note.Text="删除成功";
				
			}
			catch(SqlException)
			{
				st_lbl_note.Text="删除失败";
				st_lbl_note.Style["color"]="red";
			}
			st_comm.Connection.Close();			
			ST_BindGrid();
		}
		public void DataGrid_update(object sender,DataGridCommandEventArgs e)
		{
			string st_sqlstr="update ST_course set ST_Course_name=@Course_name,ST_Course_period=@Course_period,ST_Course_credit=@Course_credit,ST_Course_kind=@Course_kind where ST_Course_id=@Course_id";
			SqlCommand st_comm=new SqlCommand(st_sqlstr,st_conn);
			st_comm.Parameters.Add(new SqlParameter("@Course_name",SqlDbType.VarChar,50));
			st_comm.Parameters.Add(new SqlParameter("@Course_period",SqlDbType.Int,4));
			st_comm.Parameters.Add(new SqlParameter("@Course_credit",SqlDbType.Int,4));
			st_comm.Parameters.Add(new SqlParameter("@Course_kind",SqlDbType.Int,4));
			st_comm.Parameters.Add(new SqlParameter("@Course_id",SqlDbType.VarChar,50));
			string st_colvalue=((TextBox)e.Item.Cells[1].Controls[0]).Text;
			st_comm.Parameters["@Course_name"].Value=st_colvalue;
			st_colvalue=((TextBox)e.Item.Cells[2].Controls[0]).Text;
			st_comm.Parameters["@Course_period"].Value=st_colvalue;
			st_colvalue=((TextBox)e.Item.Cells[3].Controls[0]).Text;
			st_comm.Parameters["@Course_credit"].Value=st_colvalue;
			st_colvalue=((DropDownList)e.Item.FindControl("st_ddl_coursekind")).SelectedIndex.ToString();
			st_comm.Parameters["@Course_kind"].Value=st_colvalue;
			st_comm.Parameters["@Course_id"].Value=st_dtg_course.DataKeys[(int)e.Item.ItemIndex];
			st_comm.Connection.Open();
			try
			{
				st_comm.ExecuteNonQuery();
				st_lbl_note.Text="编辑成功";
				st_dtg_course.EditItemIndex=-1;
			}
			catch(SqlException)
			{
				st_lbl_note.Text="编辑失败";
				st_lbl_note.Style["color"]="red";
			}
			st_comm.Connection.Close();		
			ST_BindGrid();
			
		}
		public void ST_BindGrid()
		{
			st_sqlstr="select * from ST_course";
			SqlDataAdapter st_da=new SqlDataAdapter(st_sqlstr,st_conn);
			DataSet st_ds=new DataSet();
			st_da.Fill(st_ds);
			st_dtg_course.DataSource=st_ds;
			st_dtg_course.DataBind();
		}

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

		
		private void st_btn_search_Click(object sender, System.EventArgs e)
		{
			st_sqlstr="select * from ST_course  where ST_Course_id='"+st_tbx_id.Text+"'or ST_Course_name='"+st_tbx_name.Text+"'";
			SqlDataAdapter st_da=new SqlDataAdapter(st_sqlstr,st_conn);
			DataSet st_ds=new DataSet();
			st_da.Fill(st_ds);
			st_dtg_course.DataSource=st_ds;
			st_dtg_course.DataBind();
		}
	}
}