updatestudent.aspx.cs

《精通ASP.NET2.0网络应用系统开发》书中的源码

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 = "Name";
		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)
	{
		///获取数据
		Student student = new Student();
		SqlDataReader recs = student.GetSingleStudent(nStudentID);

		///读取数据
		if (recs.Read())
		{
			///显示数据
			Name.Text = recs["Name"].ToString();
			Age.Text = recs["Age"].ToString();
			Address.Text = recs["Address"].ToString();
			Phone.Text = recs["Phone"].ToString();
			Birthday.Text = recs["Birthday"].ToString();
			EntranceDate.Text = recs["EntranceDate"].ToString();
			Nationality.Text = recs["Nationality"].ToString();
			Political.Text = recs["Political"].ToString();
			NativePlace.Text = recs["NativePlace"].ToString();
			IdentityCard.Text = recs["IdentityCard"].ToString();
			Hukou.Text = recs["Hukou"].ToString();
			Desn.Text = recs["Desn"].ToString();

			ASPNET2System.SetListBoxItem(ClassList,recs["ClassID"].ToString());
			ASPNET2System.SetListBoxItem(SexList,recs["Sex"].ToString());
			ASPNET2System.SetListBoxItem(Maritallist,recs["Marital"].ToString());
			ASPNET2System.SetListBoxItem(StateList,recs["State"].ToString());
		}
		recs.Close();          ///关闭数据源
	}

	protected void UpdateBtn_Click(object sender,EventArgs e)
	{
		///如果页面输入内容合法
		if (Page.IsValid == true)
		{
			///定义类
			StudentManager.Student student = new StudentManager.Student();
			try
			{
				///修改
				student.UpdateStudent(nStudentID,Int32.Parse(ClassList.SelectedValue),Name.Text,
					Int32.Parse(Age.Text.Trim()),Int32.Parse(SexList.SelectedValue),
					Address.Text.Trim(),Phone.Text.Trim(),
					DateTime.Parse(Birthday.Text.Trim()),
					DateTime.Parse(EntranceDate.Text.Trim()),
					Nationality.Text.Trim(),Political.Text.Trim(),
					NativePlace.Text.Trim(),IdentityCard.Text.Trim(),
					Int32.Parse(Maritallist.SelectedValue),Hukou.Text.Trim(),
					Int32.Parse(StateList.SelectedValue),Desn.Text);

				///显示操作结果信息
				Response.Write("<script>window.alert('" + ASPNET2System.OPERATIONUPDATESUCCESSMESSAGE + "')</script>");
			}
			catch (Exception ex)
			{
				///显示修改操作中的失败、错误信息
				Response.Redirect("~/DesktopModules/ErrorPage.aspx?ErrorUrl="
					+ ASPNET2System.RedirectErrorUrl(Request.RawUrl)
					+ "&ErrorMessage=" + ex.Message.Replace("\n"," "));
			}
		}
	}

	protected void ReturnBtn_Click(object sender,EventArgs e)
	{
		///返回管理页面
		Response.Redirect("~/DesktopModules/Student/StudentManage.aspx");
	}	
}