在窗體中添加一個TreeView控件,設置CheckBox屬性為True，綁定數據

Archive jkj = new Archive();//自定義類
??????? public void Bind()
??????? {
??????????? DataTable rol = jkj.GetDataTable("select rolesid,description from roles","roles");
????????????
??????????? this.listBox1.DataSource = rol;
??????????? this.listBox1.DisplayMember = "description";
??????????? this.listBox1.ValueMember = "rolesid";
??????????? this.treeView1.Nodes.Clear();
??????????? DataTable mod = jkj.GetDataTable("select modelno,modelename from modelname", "modelname");
??????????? foreach (DataRow mrow in mod.Rows)
??????????? {
??????????????? TreeNode mtn = new TreeNode();
??????????????? mtn.Text = mrow["modelename"].ToString();
??????????????? mtn.Tag = mrow["modelno"].ToString();
??????????????? this.treeView1.Nodes.Add(mtn);
??????????????? string sql = "select funcno,cname from funcname where modelno=" + int.Parse(mtn.Tag.ToString())+" order by funcno";
??????????????? DataTable fun = jkj.GetDataTable(sql, "funcname");
??????????????? foreach (DataRow frow in fun.Rows)
??????????????? {
??????????????????? TreeNode ftn = new TreeNode();
??????????????????? ftn.Text = frow["cname"].ToString();
??????????????????? ftn.Tag = frow["funcno"].ToString();
??????????????????? mtn.Nodes.Add(ftn);
??????????????? }
??????????? }
??????????? this.treeView1.ExpandAll();
??????? }

??????? private void Form1_Load(object sender, EventArgs e)
??????? {
??????????? Bind();//綁定數據源
??????? }

//?在TreeView控件的AfterCheck事件中加入：

private void treeView1_AfterCheck(object sender, TreeViewEventArgs e)
??????? {
??????????? TreeView tree = (TreeView)sender;
??????????? tree.AfterCheck -= new TreeViewEventHandler(this.treeView1_AfterCheck);

??????????? //折疊其他同級節點???
??????????? TreeNode parentNode = e.Node.Parent;
??????????? if (parentNode != null)
??????????? {
??????????????? foreach (TreeNode tn in parentNode.Nodes)
??????????????? {
??????????????????? if (tn != e.Node)
??????????????????????? tn.Collapse();
??????????????? }
??????????? }
??????????? else
??????????? {
??????????????? foreach (TreeNode tn in tree.Nodes)
??????????????? {
??????????????????? if (tn != e.Node)
??????????????????????? tn.Collapse();
??????????????? }
??????????? }

??????????? //標記該節點的所有子節點的選中狀態與該節點一致???
??????????? foreach (TreeNode tn in e.Node.Nodes)
??????????????? tn.Checked = e.Node.Checked;

??????????? //if?? (e.Node.Checked)???
??????????? e.Node.ExpandAll(); //如果該節點為選中，展開該節點???
??????????? //else???
??????????? // e.Node.Toggle(); //如果該節點沒有選中：如果該節點處于折疊狀態，則展開該節點，否則折疊它??

??????????? //如果當前節點的父節點下的所有子節點都沒有選中，去掉父節點的選中???
??????????? if (e.Node.Checked == false && e.Node.Parent != null)
??????????? {
??????????????? bool found = false; //父節點的子節點中至少有一個節點被選中，則found?? =?? true???
??????????????? foreach (TreeNode tn in e.Node.Parent.Nodes)
??????????????? {
??????????????????? if (tn.Checked == true)
??????????????????? {
??????????????????????? found = true;
??????????????????????? break;
??????????????????? }
??????????????? }
??????????????? if (found == false) //沒有找到任何被選中的子節點???
??????????????? {
??????????????????? e.Node.Parent.Checked = false;
??????????????????? e.Node.Parent.Collapse();
??????????????? }
??????????? }

??????????? tree.AfterCheck += new TreeViewEventHandler(this.treeView1_AfterCheck);
??????????? this.treeView1.FullRowSelect = true;

下面的代碼作用是：選取父節點后，選取其所有子節點。
??????????? //foreach (TreeNode tn in e.Node.Nodes)
??????????? //{
??????????? //??? tn.Checked = e.Node.Checked;

??????????? //}
??????? }

轉載于:https://www.cnblogs.com/chensuqian/p/9644827.html

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