/// <summary>
/// 修改学生信息事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void pData_OnStudentModify(object sender, EventArgsStudent e)
{
TreeNode tn = treeView1.SelectedNode;
if (tn == null)
{
return;
}
//学生的系和班级没有更改,修改表格中的内容
if (tn.Text == e.NewClassName || tn.Text == e.NewDepName || tn.Text == "全部")
{
DataGridViewRow row = dataGridView1.Rows[this.rowindex];
row.Cells["StuName"].Value = e.NewStuobj.Name;
row.Cells["StuAge"].Value = e.NewStuobj.Age;
row.Cells["StuSex"].Value = e.NewStuobj.Sex.ToString();
row.Cells["StuChinese"].Value = e.NewStuobj.Chinese;
row.Cells["StuEnglish"].Value = e.NewStuobj.English;
row.Cells["StuMath"].Value = e.NewStuobj.Math;
row.Cells["StuComputer"].Value = e.NewStuobj.Computer;
}
else
{
dataGridView1.Rows.RemoveAt(rowindex);
}
}
/// <summary>
/// 删除一个学生
/// </summary>
/// <param name="depname">学生所在系的名称</param>
/// <param name="classname">学生所在班级的名称</param>
/// <param name="stu">学生对象</param>
/// <returns>成功：true；失败：false</returns>
internal bool DelStudent(string depname, string classname, Student stu)
{
Department depobj = FindDepartmentByName(depname);
if (depobj == null)
{
return(false); //没有找到系对象，返回
}
clsClass clsobj = depobj.FindClassByName(classname);
if (clsobj == null)
{
return(false); //没有找到班对象，返回
}
if (clsobj.DelStudent(stu)) //删除成功
{
EventArgsStudent e = new EventArgsStudent();
e.depobj = depobj;
e.clsobj = clsobj;
e.stuobj = stu;
e.number = StudentNumber;
ActOnStudentDel(this, e);
return(true);
}
return(false);
}
/// <summary>
/// 增加一个学生
/// </summary>
/// <param name="depname">学生所在系的名称</param>
/// <param name="classname">学生所在班级的名称</param>
/// <param name="stu">学生对象</param>
/// <returns></returns>
internal bool AddStudent(string depname, string classname, Student stu)
{
Department depobj = FindDepartmentByName(depname);
if (depobj == null)
{
return(false);
}
clsClass clsobj = FindClassByName(depobj, classname);
if (clsobj == null)
{
return(false);
}
if (clsobj.AddStudent(stu)) //学生增加成功
{
EventArgsStudent e = new EventArgsStudent();
e.clsobj = clsobj; e.depobj = depobj;
e.stuobj = stu;
e.number = StudentNumber;
ActOnStudentAdd(this, e);
return(true);
}
return(false);
}
private void ActOnStudentModify(object sender, EventArgsStudent e)
{
if (this.OnStudentModify != null)
{
OnStudentModify(this, e);
}
}
private void ActOnStudentDel(object sender, EventArgsStudent e)
{
if (OnStudentDel != null)
{
OnStudentDel(this, e);
}
}
/// <summary>
/// 修改学生信息
/// </summary>
/// <param name="OldDepName">修改前所在的系名称</param>
/// <param name="NewDepName">修改后所在的系名称</param>
/// <param name="OldClassName">修改前所在的班级名称</param>
/// <param name="NewClassName">修改后所在的班级名称</param>
/// <param name="StudentID">学生的ID</param>
/// <param name="NewStudent">新的学生对象</param>
/// <returns>成功：true；失败：false</returns>
internal bool ModifyStudent(string OldDepName, string NewDepName,
string OldClassName, string NewClassName,
string StudentID, Student NewStudent)
{
Department olddep;
clsClass oldclass;
Student OldStudent = FindStudentByID(StudentID, out olddep, out oldclass);
Department newdep = FindDepartmentByName(NewDepName);
clsClass newclass = FindClassByName(newdep, NewClassName);//原来的学生对象
//找不到相应的对象，则返回ture;
if (olddep == null || newdep == null || oldclass == null || newclass == null || OldStudent == null)
{
return(false);
}
if (olddep == newdep)
{
if (oldclass == newclass) //学生所在的系和班级没有改动
{
ChangeStudentInfo(OldStudent, NewStudent);
EventArgsStudent e = new EventArgsStudent();
e.OldDepName = OldDepName; e.OldClassName = OldClassName;
e.NewDepName = NewDepName; e.NewClassName = NewClassName;
e.stuobj = OldStudent; e.NewStuobj = NewStudent;
e.number = StudentNumber;
ActOnStudentModify(this, e);
}
else //系没有改动，班级发生改动
{
oldclass.DelStudent(StudentID); //在原来班级中删除学生对象
newclass.AddStudent(NewStudent); //在新班级中添加学生
EventArgsStudent e = new EventArgsStudent();
e.OldDepName = OldDepName; e.OldClassName = OldClassName;
e.NewDepName = NewDepName; e.NewClassName = NewClassName;
e.stuobj = OldStudent; e.NewStuobj = NewStudent;
e.number = StudentNumber;
ActOnStudentModify(this, e);
}
}
else//系发生改变
{
DelStudent(OldDepName, OldClassName, StudentID);//在原来的系原来的班级中删除学生对象
AddStudent(NewDepName, NewClassName, NewStudent);//在新的系新的班级中增加学生
EventArgsStudent e = new EventArgsStudent();
e.OldDepName = OldDepName; e.OldClassName = OldClassName;
e.NewDepName = NewDepName; e.NewClassName = NewClassName;
e.stuobj = OldStudent; e.NewStuobj = NewStudent;
e.number = StudentNumber;
ActOnStudentModify(this, e);
}
return(true);
}
/// <summary>
/// 处理删除学生事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void pData_OnStudentDel(object sender, EventArgsStudent e)
{
TreeNode tndep = FindNodeInTree(e.depobj.Name);
TreeNode tncls = FindNodeInTree(e.clsobj.Name);
if (treeView1.SelectedNode == tndep || treeView1.SelectedNode == tncls ||
treeView1.SelectedNode.Text == "全部")
{
int index = FindStudentInDataGridView(e.stuobj.ID);
if (index != -1)
{
dataGridView1.Rows.RemoveAt(index);
}
this.labelStudentNumber.Text = "学生数量：" + e.number.ToString("00");
}
}
/// <summary>
/// 处理增加学生事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void pData_OnStudentAdd(object sender, EventArgsStudent e)
{
TreeNode depNode = FindNodeInTree(e.depobj.Name); //学生对应的系节点
TreeNode clsNode = FindNodeInTree(e.clsobj.Name); //学生对应的班级节点
//如果treeView当前节点是“全部”或是学生所在的系或者是学生所在的班级节点，则显示学生信息
if (treeView1.SelectedNode != null)
{
if (treeView1.SelectedNode.Text == "全部" || treeView1.SelectedNode == depNode ||
treeView1.SelectedNode == clsNode)
{
this.AddStudentInDataGridView(e.stuobj);
}
}
this.labelStudentNumber.Text = "学生数量：" + e.number.ToString("00");
}
