C#递归在dropdownlist显示树状(转)

　　/// <summary>    /// 绑定文件分类    /// </summary>    public void bind()    {        //获取数据集        DataSet ds = new DataSet();        ds = ec.ExecuteSelectCmmond("select * from t_Column where U_UserID='" + HttpContext.Current.Request.Cookies["NameID"].Value + "'", ds);        BindingCWAList(DropDownList1, ds);    }    private void BindingCWAList(DropDownList ddlID, DataSet ds) //ddlID是DropDownList控件的ID     {        DropDownList1.Items.Clear();        //此处创建顶极分类,Value=0(如不需要，可以删除此行)         ddlID.Items.Add(new ListItem("请选择目录", "0"));        InitList(ddlID, 0, ds, "");    }    private void InitList(DropDownList ddlID, int parentID, DataSet catagoryDS, string indent)    {        //Select后边的是DataSet里面的列名         System.Data.DataRow[] currRows = catagoryDS.Tables[0].Select("ColumnFatherld=" + parentID.ToString(), "ColumnFatherld ASC");        int count = currRows.Length;        DataRow catagoryRow;        for (int i = 0; i < count; i++)        {            catagoryRow = currRows[i];            System.Web.UI.WebControls.ListItem item = new System.Web.UI.WebControls.ListItem(indent + catagoryRow　　　　  ["ColunmnName"].ToString(), catagoryRow["ColumnId"].ToString());            ddlID.Items.Add(item);            InitList(ddlID, Int32.Parse(catagoryRow["ColumnId"].ToString()), catagoryDS, indent + "……");        }    }

转载于:https://www.cnblogs.com/xiebin1986/archive/2010/02/01/1661224.html

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