DesktopModules/Score/SelectScore.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;
using SQLHelper;

public partial class DesktopModules_Score_SelectScore : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
		///
		GradeList.Visible = GradeLable.Visible = false;
		if (!Page.IsPostBack)
		{
			///绑定年级的数据
			BindGradeData();
			GradeList.Visible = GradeLable.Visible = true;
		}
    }

	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();
	}

	private void BindClassData(int nGradeID)
	{
		///定义获取数据的类
		Class gClass = new Class();
		SqlDataReader recg = gClass.GetClassByGrade(nGradeID);

		///设定控件的数据源
		ClassList.DataSource = recg;

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