DesktopModules/Student/UpdateStudent.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 UpdateStudent : System.Web.UI.Page
{
	int nStudentID = -1;

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

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

		///设置更新按钮的可用性
		UpdateBtn.Enabled = ClassList.Items.Count <= 0 || nStudentID <= -1 ? false : true;
	}

	private void BindClassData()
	{
		///定义获取数据的类
		Class gClass = new Class();
		SqlDataReader rect = gClass.GetClasss();

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

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

		///绑定控件的数据
		ClassList.DataBind();

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

	private void BindStudentData(int nStudentID)