classroommanager.aspx.cs

guan yu pai ke xi tong de ruan jian

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Collections.Generic;
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 Y2T03.CourseScheduler.CourseBLL;
using Y2T03.CourseScheduler.CourseModel;

public partial class ClassRoomManager : System.Web.UI.Page
{
    /// <summary>
    /// 页面加载事件
    /// </summary>
    protected void Page_Load(object sender, EventArgs e)
    {
        //
        // 判断是否是首次加载
        //
        if (!Page.IsPostBack)
        {
            LoadTreeClassRoom();    // 获取 TreeView 中的所有节点
        }
    }

    /// <summary>
    /// 向 TreeView 中加入设施类型节点
    /// </summary>
    protected void LoadTreeClassRoom()
    {
        try
        {
            this.trvClassRoom.Nodes.Clear();   // 清空 TreeView 中的所有节点

            IList<RoomType> list = ClassRoomManagerBLL.GetRoomTypes();

            foreach (RoomType roomType in list)
            {
                TreeNode node = new TreeNode();
                node.Text = roomType.Title; // 设置该节点的显示标题
                node.Value = string.Empty;  // 非设施

                LoadChildNodeClassRoom(roomType.TypeId, node);

                this.trvClassRoom.Nodes.Add(node);  // 添加到 TreeView 的节点中
            }

            this.trvClassRoom.ExpandAll();  // 展开所有节点
        }
        catch (Exception ex)
        {
            string err = ex.Message;
        }
    }

    /// <summary>
    /// 向设施类型节点中加入教学设施节点
    /// </summary>
    /// <param name="typeId">设施类型</param>
    /// <param name="parentNode">设施类型节点</param>
    protected void LoadChildNodeClassRoom(int typeId, TreeNode parentNode)
    {
        try
        {
            IList<ClassRoom> list = ClassRoomManagerBLL.GetClassRooms(typeId);

            foreach (ClassRoom classRoom in list)
            {
                TreeNode node = new TreeNode();
                node.Text = classRoom.Title;    // 设置该节点的显示标题
                node.Value = classRoom.RoomId.ToString();    //  设置该节点的值为教学设施编号

                parentNode.ChildNodes.Add(node);     // 添加到教学设施节点下
            }
        }
        catch (Exception ex)
        {
            string err = ex.Message;
        }
    }

    /// <summary>
    /// 单击 DetailsView 控件中的“修改”按钮时，但在修改操作之前发生
    /// 目的：拦截默认的更新方法，改为调用自定义的更新方法
    /// </summary>
    protected void dtvClassRoom_ItemUpdating(object sender, DetailsViewUpdateEventArgs e)
    {
        try
        {
            ClassRoom classRoom = new ClassRoom();

            // 找到dtvClassRoom中的行中控件的值
            Label roomId = this.dtvClassRoom.FindControl("lblRoomId") as Label;
            TextBox title = this.dtvClassRoom.FindControl("txtTitle") as TextBox;
            RadioButtonList roomType = this.dtvClassRoom.FindControl("rbtGetRoomTypes") as RadioButtonList;
            DropDownList product = this.dtvClassRoom.FindControl("ddlGetProducts") as DropDownList;

            classRoom.RoomId = int.Parse(roomId.Text);
            classRoom.Title = title.Text;
            classRoom.RoomType.TypeId = int.Parse(roomType.SelectedValue.ToString());
            classRoom.Product.ProductId = int.Parse(product.SelectedValue.ToString());

            bool flg = ClassRoomManagerBLL.Update(classRoom);    // 调用自定义的更新方法

            if (flg == true)
            {
                this.LoadTreeClassRoom();    // 重新加载课程目录树

                PopupMessage("修改成功!!!");  // 弹出 "修改成功" 的消息提示框
            }
            else
            {
                PopupMessage("设施名称已经存在,并却设施名称长度最长为 10位!!!");  // 弹出消息提示框
            }
            this.dtvClassRoom.ChangeMode(DetailsViewMode.ReadOnly);
        }
        catch (Exception ex)
        {
            string err = ex.Message;
        }
        finally
        {
            e.Cancel = true;     // 取消更新事件，不执行“更新”按钮绑定的方法
        }
    }

    /// <summary>
    /// 弹出操作结果
    /// </summary>
    /// <param name="message">弹出对话框信息内容</param>
    protected void PopupMessage(string message)
    {
        try
        {
            ClientScriptManager csm = this.Page.ClientScript;   // 获取管理客户端脚本的方法
            Type type = this.GetType();     // 获取类型
            string csKey = "PopupMessage";  // 设置消息

            //
            // 判断是否已经注册了启动脚本
            //
            if (!csm.IsStartupScriptRegistered(type, csKey))
            {
                string script = string.Format("alert('{0}');", message);    //格式化输出弹出消息的内容
                csm.RegisterStartupScript(type, csKey, script, true);   //注册启动脚本
            }
        }
        catch (Exception ex)
        {
            string err = ex.Message;
        }
    }
    protected void dtvClassRoom_ItemInserting(object sender, DetailsViewInsertEventArgs e)
    {
        try
        {
            ClassRoom classRoom = new ClassRoom();

            // 找到dtvClassRoom中的行中控件的值
            TextBox title = this.dtvClassRoom.FindControl("txtTitle") as TextBox;
            RadioButtonList roomType = this.dtvClassRoom.FindControl("rbtGetRoomTypes") as RadioButtonList;
            DropDownList product = this.dtvClassRoom.FindControl("ddlGetProducts") as DropDownList;

            classRoom.Title = title.Text;
            classRoom.RoomType.TypeId = int.Parse(roomType.SelectedValue.ToString());
            classRoom.Product.ProductId = int.Parse(product.SelectedValue.ToString());

            bool flg = ClassRoomManagerBLL.Create(classRoom);    // 调用自定义的插入方法

            if (flg == true)
            {
                this.LoadTreeClassRoom();    // 重新加载课程目录树

                PopupMessage("添加成功!!!");  // 弹出 "添加成功" 的消息提示框
            }
            else
            {
                PopupMessage("设施名称已经存在,并却设施名称长度最长为 10位!!!");  // 弹出消息提示框
            }
            this.dtvClassRoom.ChangeMode(DetailsViewMode.ReadOnly);
        }
        catch (Exception ex)
        {
            string err = ex.Message;
        }
        finally
        {
            e.Cancel = true;     // 取消插入事件，不执行“插入”按钮绑定的方法
        }
    }
    protected void dtvClassRoom_ItemDeleting(object sender, DetailsViewDeleteEventArgs e)
    {
        try
        {
            int roomId = int.Parse(e.Keys["RoomId"].ToString());    // 获得 DetailsView 的 DataKeyNames 键值，该属性中保存有实体对象的主键

            int nodeOne = this.trvClassRoom.Nodes[0].ChildNodes.Count;
            int nodeTwo = this.trvClassRoom.Nodes[1].ChildNodes.Count;

            if ((nodeOne == 1 && nodeTwo == 0) || (nodeOne == 0 && nodeTwo == 1))
            {
                PopupMessage("节点不能全部删除,若想删除,请添加节点后再进行删除!!!");  // 弹出 "删除成功" 的消息提示框
            }
            else
            {
                ClassRoomManagerBLL.Delete(roomId);    // 调用自定义的删除方法

                this.LoadTreeClassRoom();    // 重新加载课程目录树

                PopupMessage("删除成功!!!");  // 弹出 "删除成功" 的消息提示框
            }
            this.dtvClassRoom.ChangeMode(DetailsViewMode.ReadOnly);
        }
        catch (Exception ex)
        {
            string err = ex.Message;
        }
        finally
        {
            e.Cancel = true;     // 取消删除事件，不执行“删除”按钮绑定的方法
        }
    }
}