注意点总结
1.DropDownList的OnSelectedIndexChanged调用的前提:AutoPostBack=true
2.TreeView:①.TreeView.Nodes.Count=一级节点的个数 ②.遍历所有节点
1 string name = ""; 2 private void GetAllNodes(TreeNodeCollection Nodes) 3 { 4 foreach (TreeNode node in Nodes) 5 { 6 name += node.Text; 7 name += ","; 8 if (node.ChildNodes.Count > 0) 9 { 10 GetAllNodes(node.ChildNodes); 11 } 12 } 13 }
3.string.Remove()、Substring()、Insert()之后都需要重新赋值
1 string str="12345"; 2 str=str.Remove(index,count); 3 str=str.Insert(index,value);