classteachingmanager.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 ClassTeachingManager : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        //
        // 判断是否是首次加载
        //
        if (!Page.IsPostBack)
        {
            LoadTreeClassType();  // 获取 TreeView 中的所有节点
        }
    }

    /// <summary>
    /// 向 TreeView 中加入节点
    /// </summary>
    protected void LoadTreeClassType()
    {
        try
        {
            this.trvClassTeaching.Nodes.Clear();   // 清空 TreeView 中的所有节点

            IList<ClassType> list = ClassManagerBLL.GetClassTypes();

            foreach (ClassType classType in list)
            {
                TreeNode node = new TreeNode();
                node.Text = classType.Title;  // 设置该节点的显示标题
                node.Value = string.Empty;  // 非课程

                LoadChildNodeClassTeaching(classType.TypeCode, node);

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

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

    /// <summary>
    /// 向班级类型节点中加入班级节点
    /// </summary>
    /// <param name="typeCode">班级类型</param>
    /// <param name="parentNode">产品类型节点</param>
    protected void LoadChildNodeClassTeaching(string typeCode, TreeNode parentNode)
    {
        try
        {
            IList<Teaching> list = ClassTeachingManagerBLL.GetClassTeachings(typeCode);

            foreach (Teaching teaching in list)
            {
                TreeNode node = new TreeNode();
                node.Text = teaching.Classe.ClassCode;  // 设置该节点的显示标题
                node.Value = teaching.Classe.ClassCode;  // 设置该节点的值为班级编码

                parentNode.ChildNodes.Add(node);    // 添加到产品类型节点下
            }
        }
        catch (Exception ex)
        {
            string err = ex.Message;
        }
    }

    /// <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 dtvClassTeaching_ItemDeleting(object sender, DetailsViewDeleteEventArgs e)
    {
        try
        {
            string classCode = e.Keys["Classe"].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.trvClassTeaching.Nodes[0].ChildNodes.Count;
            int nodeTwo = this.trvClassTeaching.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
            {
                ClassTeachingManagerBLL.Delete(classCode);    // 调用自定义的删除方法

                this.LoadTreeClassType();    // 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.dtvClassTeaching.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
        }
    }
    protected void dtvClassTeaching_ItemInserting(object sender, DetailsViewInsertEventArgs e)
    {
        try
        {
            Teaching teaching = new Teaching();

            // 找到dtvClassRoom中的行中控件的值
            DropDownList classe = this.dtvClassTeaching.FindControl("ddlGetClasses") as DropDownList;
            DropDownList teacher = this.dtvClassTeaching.FindControl("ddlGetTeacher") as DropDownList;
            DropDownList course = this.dtvClassTeaching.FindControl("ddlGetCourses") as DropDownList;

            teaching.Classe.ClassCode = classe.SelectedValue;
            teaching.Teacher.TeacherId = int.Parse(teacher.SelectedValue);
            teaching.Course.CourseId = int.Parse(course.SelectedValue);

            if (ClassTeachingManagerBLL.CheckIsExit(teaching.Classe.ClassCode) == false)
            {
                bool flg = ClassTeachingManagerBLL.Create(teaching);    // 调用自定义的插入方法
                int count = ClassTeachingManagerBLL.GetClassCountByTeacherId(teaching.Teacher.TeacherId);

                if (count <= 9)
                {
                    if (flg == true)
                    {
                        this.LoadTreeClassType();    // 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("教员授课资料不够!!!");
                    }
                }
                else
                {
                    PopupMessage("该教员带班数量过多,这样会影响教学质量!!!");
                }
            }
            else
            {
                PopupMessage("该班授课信息已经存在!!!");
            }
            this.dtvClassTeaching.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 dtvClassTeaching_ItemUpdating(object sender, DetailsViewUpdateEventArgs e)
    {
        try
        {
            Teaching teaching = new Teaching();

            // 找到dtvClassRoom中的行中控件的值
            Label classe = this.dtvClassTeaching.FindControl("lblClass") as Label;
            DropDownList teacher = this.dtvClassTeaching.FindControl("ddlGetTeacher") as DropDownList;
            DropDownList course = this.dtvClassTeaching.FindControl("ddlGetCourses") as DropDownList;

            teaching.Classe.ClassCode = classe.Text.Trim();
            teaching.Teacher.TeacherId = int.Parse(teacher.SelectedValue);
            teaching.Course.CourseId = int.Parse(course.SelectedValue);

            bool flg = ClassTeachingManagerBLL.Update(teaching);    // 调用自定义的更新方法
            int count = ClassTeachingManagerBLL.GetClassCountByTeacherId(teaching.Teacher.TeacherId);

            if (count <= 9)
            {

                if (flg == true)
                {
                    this.LoadTreeClassType();    // 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("教员授课资料不够!!!");
                }
            }
            else
            {
                PopupMessage("该教员带班数量过多,这样会影响教学质量!!!");
            }
            this.dtvClassTeaching.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
        }
    }
}