MFC - CTreeCtrl操作

最新推荐文章于 2022-07-09 19:29:40 发布

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本文介绍了如何在MFC中使用CTreeCtrl控件进行操作，包括设置控件属性、插入父项和子项，以及响应TVN_SELCHANGED消息来获取选中子项的值并弹出相应提示。

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1.将CTreeCtrl控件拖入对话框中，并创建变量m_tree,然后设置属性
Has Buttons	:True
Has Lines  	:True
Lines At Root	:True

2.在CDialog头文件中加入
HTREEITEM activeItem; //活动子项
HTREEITEM activeparentItem; //活动父项

3.在CDialog初始化OnInitDialog()中加入
CString userTreeHeader[3]={L"一班",L"二班",L"三班"};
HTREEITEM userItem[3]; //树形控件的根项
for(int i=0;i<3;i++)
{
	userItem[i]=m_tree.InsertItem(userTreeHeader[i],0,0,TVI_ROOT);
	//插入父项
	m_tree.SetItemData(userItem[i],(DWORD)(i+10)); //给父项设值
}
HTREEITEM thePoint;
HTREEITEM userSpecifics=m_tree.InsertItem(L"张三",2,2,userItem[0]);
m_tree.SetItemData(userSpecifics,(DWORD)0);
thePoint=userSpecifics;
userSpecifics=m_tree.InsertItem(L"李四",3,3,userItem[0]); //父项 1 插入子项
m_tree.SetItemData(userSpecifics,(DWORD)1);//子项赋值 1
userSpecifics=m_tree.InsertItem(L"王五",3,3,userItem[0]); //父项 1 插入子项
m_tree.SetItemData(userSpecifics,(DWORD)2); //子项赋值 2
userSpecifics=m_tree.InsertItem(L"王明",3,3,userItem[1]); //父项 2 插入子项
m_tree.SetItemData(userSpecifics,(DWORD)3); //子项赋值 3
userSpecifics=m_tree.InsertItem(L"李亮",3,3,userItem[1]); //父项 2 插入子项
m_tree.SetItemData(userSpecifics,(DWORD)4); //子项赋值 4
userSpecifics=m_tree.InsertItem(L"赵六",3,3,userItem[2]); //父项 3 插入子项
m_tree.SetItemData(userSpecifics,(DWORD)5); //子项赋值 5
userSpecifics=m_tree.InsertItem(L"孙刚",3,3,userItem[2]); //父项 3 插入子项
m_tree.SetItemData(userSpecifics,(DWORD)6); //子项赋值 6
m_tree.Select(thePoint,TVGN_CARET); //子项 0 为选定项

4.响应CTreeCtrl控件TVN_SELCHANGED 消息，并添加如下代码
HTREEITEM SelItem;
SelItem=m_tree.GetSelectedItem(); //获取选中的子项
DWORD m;
m=m_tree.GetItemData(SelItem); //读取子项的值
switch (m)
{
	case 0:
		{
			this->MessageBox(L"0");
			break;
		}
	case 1:
		{
			this->MessageBox(L"1");
			break;
		}
	case 2:
		{
			this->MessageBox(L"2");
			break;
		}
	case 3:
		{
			this->MessageBox(L"3");
			break;
		}
	case 4:
		{
			this->MessageBox(L"4");
			break;
		}
	case 5:
		{
			this->MessageBox(L"5");
			break;
		}
		
}