求教 给treeview控件添加节点

[wszw123wszw]

给studio下的winform窗体添加节点，节点是要从数据库里读取的字段，求教！！！！！！！！！！

[porschev]

添加节点很简单啊

TreeNode tn= new TreeNode();  //创建个节点
tn.Text = "新添加的";

要添加的node.Nodes.Add(tn);  //添加到父节点上

[xpcxpy]

code=C#]TreeNode treeNode1= treeView1.Nodes.Add(“第一个根节点”);
TreeNode treeNode2= treeNode1.Nodes.Add("第一个根节点的子节点")[[/code]

[gxingmin]

给一段以前我写的c#代码，将数据库中的信息填充到treeview上

/// <summary>
		/// 将一个表数据填充到指定树上，父节点编号和子节点编号由两个字段表示。
		/// </summary>
		/// <param name="tree">需要填充的树对象</param>
		/// <param name="dtData">数据所在的表对象</param>
		/// <param name="strOIDFieldName">子节点编号字段</param>
		/// <param name="strParentFieldName">父节点编号字段</param>
		/// <param name="strTextFieldName">节点文本字段</param>
		/// <param name="strSortFieldName">排序字段名称</param>
		/// <returns>成功返回True，否则返回False</returns>
		public static bool FillTree(TreeView tree,DataTable dtData,
			                        string strOIDFieldName,string strParentFieldName,
			                        string strTextFieldName,string strSortFieldName)
		{
			if(tree==null || dtData==null || dtData.Columns.Count<2)
				return false;

			if( !dtData.Columns.Contains(strOIDFieldName) || 
				!dtData.Columns.Contains(strParentFieldName) ||
				!dtData.Columns.Contains(strTextFieldName))
				return false;

			ImageList imgList=tree.ImageList;
			tree.ImageList=null;

			tree.Nodes.Clear();

			DataRow []drRoot;
			
			if(strSortFieldName!=null && dtData.Columns.Contains(strSortFieldName))
				drRoot=dtData.Select(strParentFieldName + " = '' OR " + strParentFieldName + " IS NULL",strSortFieldName);
			else
				drRoot=dtData.Select(strParentFieldName + " = '' OR " + strParentFieldName + " IS NULL");

			if(drRoot==null || drRoot.Length==0)
				return true;
			
			foreach(DataRow dr in drRoot)
			{
				TreeNode nodRoot = tree.Nodes.Add(dr[strTextFieldName].ToString());
				nodRoot.ImageIndex=tree.ImageIndex;
				nodRoot.SelectedImageIndex=tree.SelectedImageIndex;
				nodRoot.Tag=dr[strOIDFieldName].ToString();

				FillNode(nodRoot,dtData,strOIDFieldName,strParentFieldName,strTextFieldName,strSortFieldName);
			}

			tree.ImageList=imgList;
			tree.Refresh();

			return true;
			
		}
private static void FillNode(TreeNode nodParent,DataTable dtData,string strOIDFieldName,string strParentFieldName,string strTextFieldName,string strSortFieldName)
		{
			DataRow []drParent;
			
			if(strSortFieldName!=null && dtData.Columns.Contains(strSortFieldName))
				drParent=dtData.Select(strParentFieldName + " = '" + nodParent.Tag.ToString() + "'",strSortFieldName);
			else
				drParent=dtData.Select(strParentFieldName + " = '" + nodParent.Tag.ToString() + "'");

			if(drParent==null || drParent.Length==0)
				return;

			foreach(DataRow dr in drParent)
			{
				TreeNode node = nodParent.Nodes.Add(dr[strTextFieldName].ToString());
				node.ImageIndex=nodParent.ImageIndex;
				node.SelectedImageIndex=nodParent.ImageIndex;
				node.Tag=dr[strOIDFieldName].ToString();

				FillNode(node,dtData,strOIDFieldName,strParentFieldName,strTextFieldName,strSortFieldName);
			}

		}

[Tosp2012]

[Quote=引用 3 楼 gxingmin 的回复:]
给一段以前我写的c#代码，将数据库中的信息填充到treeview上

C# code
/// <summary>
/// 将一个表数据填充到指定树上，父节点编号和子节点编号由两个字段表示。
/// </summary>
/// <param name="tree">需要填充的树对象</param>
/// <param ……
[/Quote]
使用遞歸，遍歷節點，添加到TreeView上。
例子參考 “石頭”的代碼。

[Tragedy]

给你一个以前回答的地址：http://topic.csdn.net/u/20110521/10/737fa8ff-6d14-4423-bd42-4dae686fb37d.html

[lliai]

可直接搜TREE控件的用法。