DesktopModules/Role/UpdateRole.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 StudentManager;
using System.Data.SqlClient;

public partial class UpdateRole : System.Web.UI.Page
{
    int nRoleID = -1;

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

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

        ///设置更新按钮的可用性
        UpdateBtn.Enabled = RoleTreeView.SelectedNode == null ? false : true;
    }

    private void BindRoleData(int nRoleID)
    {
        ///获取数据
        Role role = new Role();
        SqlDataReader recr = role.GetSingleRole(nRoleID);

        ///读取数据
        Tree tree = new Tree();
        if (recr.Read())
        {
            ///显示数据
            RoleName.Text = recr["RoleName"].ToString();
            tree.BindLeftTreeView(RoleTreeView, true, false, recr["TreeID"].ToString());
        }
        recr.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)
        {