DesktopModules/Class/UpdateClass.aspx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using StudentManager;

public partial class UpdateClass : System.Web.UI.Page
{
	int nClassID = -1;

	protected void Page_Load(object sender,EventArgs e)
	{
		///获取ID的值
		if (Request.Params["ClassID"] != null)
		{
			nClassID = Int32.Parse(Request.Params["ClassID"].ToString());
		}

		if (!Page.IsPostBack)
		{
			///绑定控件的数据
			BindGradeData();
			BindTeacherData();
			if (nClassID > -1)
			{
				BindClassData(nClassID);
			}
		}

		///设置按钮的可用性
		UpdateBtn.Enabled = GradeList.Items.Count > 0 && TeacherList.Items.Count > 0
			&& nClassID >= 0 ? true : false;
	}

	private void BindGradeData()
	{
		///定义获取数据的类
		Grade grade = new Grade();
		SqlDataReader rect = grade.GetGrades();

		///设定控件的数据源
		GradeList.DataSource = rect;

		///设定控件的Text属性和Value属性
		GradeList.DataTextField = "Desn";
		GradeList.DataValueField = "GradeID";

		///绑定控件的数据
		GradeList.DataBind();

		///关闭数据读取器和数据库的连接
		rect.Close();
	}