本文实例讲述了C# TreeView无限目录树实现方法。分享给大家供大家参考，具体如下：
#region 绑定客户树
protected void bindTreeView()
{
TreeView1.Nodes.Clear();
string userid = Session[ "UserID" ].ToString();
string sqlwr = new SY_ADMINUSER().GetUserIDListByLoginUser(userid, "CUSTOMERSERVICE" , false );
DataTable dt = Maticsoft.DBUtility.DbHelperOra.Query( "Select PARENTID,CUSTOMERID,CUSTOMERSHORT,CUSTOMERSERVICE from CU_CUSTOMER where ISDELETE='0' " + sqlwr + " order by CUSTOMERSHORT " ).Tables[0];
//定义临时树节点
TreeNode tmpNd;
//特殊处理
foreach (DataRow dr in dt.Rows)
{
DataRow[] drs = dt.Select( "CUSTOMERID='" + dr[ "PARENTID" ] + "'" );
if (drs.Length == 0) //无上级节点
{
dr[ "PARENTID" ] = "0" ;
}
}
dt.AcceptChanges();
//从DataTable中得到所有父节点为null的DataRow形成的数组
DataRow[] rows = dt.Select( "PARENTID='0'" );
//遍历根节点数组
foreach (DataRow row in rows)
{
tmpNd = new TreeNode();
//给根节点赋值
tmpNd.Value = row[ "CUSTOMERID" ].ToString();
tmpNd.Text = row[ "CUSTOMERSHORT" ].ToString();
tmpNd.Expanded = true ;
//将节点加入到树中
TreeView1.Nodes.Add(tmpNd);
AddTree(dt, TreeView1, tmpNd, row[ "CUSTOMERID" ].ToString());
}
}
public void AddTree(DataTable dt, TreeView tv, TreeNode pNode, string CUSTOMERID)
{
DataRow[] rows = dt.Select( "PARENTID='" + CUSTOMERID + "'" );
TreeNode tmpNd;
foreach (DataRow row in rows)
{
tmpNd = new TreeNode();
//给根节点赋值
tmpNd.Value = row[ "CUSTOMERID" ].ToString();
tmpNd.Text = row[ "CUSTOMERSHORT" ].ToString();
tmpNd.Expanded = true ;
pNode.ChildNodes.Add(tmpNd);
//将节点加入到树中
//TreeView1.Nodes.Add(pNode);
AddTree(dt, TreeView1, tmpNd, row[ "CUSTOMERID" ].ToString());
}
}
#endregion
希望本文所述对大家C#程序设计有所帮助。
dy("nrwz");
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