今天，主要弄了一下对于树型控件的一些方法，以及异步加载。
参考：http://www.cnblogs.com/greatverve/archive/2012/03/23/winform-treeview.html
下面是TreeView的一些用法
private void BindTreeView(){ treeView1.LabelEdit = false;//不可编辑 //添加结点 TreeNode root = new TreeNode(); root.Text = "根节点"; //一级 TreeNode node1 = new TreeNode(); node1.Text = "1"; TreeNode node2 = new TreeNode(); node2.Text = "2"; //二级 TreeNode node11 = new TreeNode(); node11.Text = "11"; TreeNode node12 = new TreeNode(); node12.Text = "12"; TreeNode node21 = new TreeNode(); node21.Text = "21"; TreeNode node22 = new TreeNode(); node22.Text = "22"; //二级加入一级 node1.Nodes.Add(node11); node1.Nodes.Add(node12); node2.Nodes.Add(node21); node2.Nodes.Add(node22); //一级加入根 root.Nodes.Add(node1); root.Nodes.Add(node2); // treeView1.Nodes.Add(root);}private void treeView1_AfterSelect(object sender, TreeViewEventArgs e){ if (treeView1.SelectedNode != null) { MessageBox.Show(treeView1.SelectedNode.Text); }} 基本用法有了，下面，就把我写的异步加载列表的方法写进去了，因为是参考网上的方法临时 写的，可能会有些不足之处，也有可以改进，优化的一些方法
DataTable dt = data.createDT(); #region 树的异步加载 ////// 载入根节点 /// public void make_rootView() { foreach (DataRow row in dt.Select("module_fatherid='M01'")) { TreeNode tn = new TreeNode(); string sk=row["module_id"].ToString(); tn.Text = row["module_name"].ToString(); treeView1.Nodes.Add(tn); DataRow[] row2=(dt.Select("module_fatherid='" + sk + "'")); if (row2.Count()!=0) { TreeNode tn1 = new TreeNode(); tn1.Text = ""; tn.Nodes.Add(tn1); } } } ////// 载入子节点 /// /// /// public void make_view(string node_id,TreeNode node) { node.Nodes.Clear(); foreach (DataRow row in dt.Select("module_fatherid='"+node_id+"'")) { TreeNode tn = new TreeNode(); string sk = row["module_id"].ToString(); tn.Text = row["module_name"].ToString(); node.Nodes.Add(tn); if ((dt.Select("module_fatherid='" + sk + "'")).Count() != 0) { TreeNode tn1 = new TreeNode(); tn1.Text = ""; tn.Nodes.Add(tn1); } } } ////// 查找父节点的ID /// /// /// public void make_NodeView(object sender, TreeViewCancelEventArgs e) { TreeNode tn = e.Node; string node_id = ""; foreach (DataRow row in dt.Select("module_name='" + tn.Text + "'")) { node_id = row["module_id"].ToString(); } make_view(node_id, tn); } #endregion private void treeView1_BeforeExpand(object sender, TreeViewCancelEventArgs e) { make_NodeView(sender, e); }
在刚载入时调用
private void Form1_Load(object sender, EventArgs e) { make_rootView(); } 在树型控件的事件treeView1_BeforeExpand调用
private void treeView1_BeforeExpand(object sender, TreeViewCancelEventArgs e) { make_NodeView(sender, e); } 下面是我的数据源，我是根据下面这个表格的结构来写代码 ，根据结构的不一样，代码 也应做相应的改变
public class data { public static DataTable createDT() { DataTable dt = new DataTable(); dt.Columns.Add("module_id"); dt.Columns.Add("module_name"); dt.Columns.Add("module_fatherid"); dt.Columns.Add("module_url"); dt.Columns.Add("module_order"); dt.Rows.Add("C1", "全国", "0", "", "1"); dt.Rows.Add("M01", "广东", "C1", "", "1"); dt.Rows.Add("M0101", "深圳", "M01", "", "100"); dt.Rows.Add("M010101", "南山区", "M0101", "", "1000"); dt.Rows.Add("M010102", "罗湖区", "M0101", "", "1001"); dt.Rows.Add("M010103", "福田区", "M0101", "", "1002"); dt.Rows.Add("M010104", "宝安区", "M0101", "", "1003"); dt.Rows.Add("M010105", "龙岗区", "M0101", "", "1004"); dt.Rows.Add("M01010301", "上梅林", "M010103", "", "1002001"); dt.Rows.Add("M01010302", "下梅林", "M010103", "", "1002002"); dt.Rows.Add("M01010303", "车公庙", "M010103", "", "1002003"); dt.Rows.Add("M01010304", "竹子林", "M010103", "", "1002004"); dt.Rows.Add("M01010305", "八卦岭", "M010103", "", "1002005"); dt.Rows.Add("M01010306", "华强北", "M010103", "", "1002006"); dt.Rows.Add("M0102", "广州", "M01", "", "101"); dt.Rows.Add("M010201", "越秀区", "M0102", "", "1105"); dt.Rows.Add("M010202", "海珠区", "M0102", "", "1106"); dt.Rows.Add("M010203", "天河区", "M0102", "", "1107"); dt.Rows.Add("M010204", "白云区", "M0102", "", "1108"); dt.Rows.Add("M010205", "黄埔区", "M0102", "", "1109"); dt.Rows.Add("M010206", "荔湾区", "M0102", "", "1110"); dt.Rows.Add("M010207", "罗岗区", "M0102", "", "1111"); dt.Rows.Add("M010208", "南沙区", "M0102", "", "1112"); return dt; } } 以上表结构是从网上摘录下来的！！！