Winform中的Treeview动态绑定数据库

http://bbs.csdn.net/topics/370139193

SQL code

 

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CREATE TABLE [dbo].[Company] (     [Id] [int] IDENTITY (1, 1)  Primary Key NOT NULL ,     [Levers] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,     [LevelId] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,     [Name] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL  )

C# code

 

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public partial class Form1 : Form     {         public string rootId = "-1";           public Form1()         {             InitializeComponent();             AddRootCompany(rootId);             AddSubCompany();         }           /// <summary>         /// 添加总公司         /// </summary>         /// <param name="rootId"></param>         private void AddRootCompany(string rootId)         {             DataSet ds = new DataSet();             using (SqlConnection con = new SqlConnection("Data Source=localhost;uid=sa;pwd=saiyang;Database=CSDN"))             {                 con.Open();                 string strSQL = "select * from Company where Levers='" + rootId + "'";                 using (SqlDataAdapter adapter = new SqlDataAdapter(strSQL, con))                 {                     adapter.Fill(ds);                 }                 TreeNode NewNode = new TreeNode();                 NewNode.Text = ds.Tables[0].Rows[0]["Name"].ToString().Trim();                 this.treeView1.Nodes.Add(NewNode);             }         }           /// <summary>         /// 添加子公司         /// </summary>         private void AddSubCompany()         {             DataSet ds = getMenuByLevel(rootId.ToString());             for (int j = 0; j < ds.Tables[0].Rows.Count; j++)             {                 InitTreeCompanyChildNode(treeView1.Nodes[j], ds.Tables[0].Rows[j]["LevelId"].ToString());             }           }           /// <summary>         /// 获取层次级别         /// </summary>         /// <param name="getparams"></param>         /// <returns></returns>         public DataSet getMenuByLevel(string param)         {             DataSet ds = new DataSet();             using (SqlConnection con = new SqlConnection("Data Source=localhost;Initial Catalog=CSDN;User ID=sa;Password=saiyang"))             {                 con.Open();                 string strSQL = "select * from Company where Levers='" + param + "'";                 using (SqlDataAdapter adapter = new SqlDataAdapter(strSQL, con))                 {                     adapter.Fill(ds);                 }             }             return ds;         }           /// <summary>         /// 递归获取子节点         /// </summary>         /// <param name="PNode"></param>         /// <param name="classParentID"></param>         private void InitTreeCompanyChildNode(TreeNode pNode, string classParentID)         {             DataSet ds = getMenuByLevel(classParentID);             DataView dataView = new DataView();             dataView = ds.Tables[0].DefaultView;             foreach (DataRowView drv in dataView)             {                 string id = drv["LevelId"].ToString();                 string name = drv["Name"].ToString();                 TreeNode NewNode = new TreeNode();                 //将子公司添加到父节点下面                 NewNode.Text = name;                 pNode.Nodes.Add(NewNode);                 InitTreeCompanyChildNode(NewNode, id);             }         }       }