本人按照网上搜的一些小用法整理的：

如果要出现左边的效果，代码如下：

public DataTable CreateDataTable()
        {
            DataTable dt = new DataTable();

//此属性设为true 每个节点前会自动增加一个check框
            treeList1.OptionsView.ShowCheckBoxes = true;

//此属性设为true 点击复选框时，可设置为半选状态 ??效果还未呈现出来
            treeList1.OptionsBehavior.AllowIndeterminateCheckState = true;

dt.Columns.Add("ID");
            dt.Columns.Add("PARENTID");
            dt.Columns.Add("NAME");

//为此表增加数据
            DataRow dr1 = dt.NewRow();
            dr1["ID"] = 1;
            dr1["PARENTID"] = 1;
            dr1["NAME"] = "类目1";
            dt.Rows.Add(dr1);

DataRow dr2 = dt.NewRow();
            dr2["ID"] = 2;
            dr2["PARENTID"] = 1;
            dr2["NAME"] = "商品1";
            dt.Rows.Add(dr2);

DataRow dr3 = dt.NewRow();
            dr3["ID"] = 3;
            dr3["PARENTID"] = 1;
            dr3["NAME"] = "商品2";
            dt.Rows.Add(dr3);

DataRow dr4 = dt.NewRow();
            dr4["ID"] = 4;
            dr4["PARENTID"] = 4;
            dr4["NAME"] = "类目2";
            dt.Rows.Add(dr4);

DataRow dr5 = dt.NewRow();
            dr5["ID"] = 5;
            dr5["PARENTID"] = 4;
            dr5["NAME"] = "商品1";
            dt.Rows.Add(dr5);

DataRow dr6 = dt.NewRow();
            dr6["ID"] = 6;
            dr6["PARENTID"] = 4;
            dr6["NAME"] = "商品2";
            dt.Rows.Add(dr6);

this.treeList1.DataSource = dt;
            this.treeList1.KeyFieldName = "ID";
            this.treeList1.ParentFieldName = "PARENTID";
            this.treeList1.Columns[0].Caption = "测试";//树的名称

return dt;
        }

如果要右边的效果，代码是：

public DataTable CreateTreeList()
        {
            DataTable dt = new DataTable();

#region TreeList属性设置

//节点前显示复选框
            this.treeList2.OptionsView.ShowCheckBoxes = true;

//此属性设为true 点击复选框时，可设置为半选状态
            treeList1.OptionsBehavior.AllowIndeterminateCheckState = true;

#endregion

#region 在TreeList中增加列
            //用于标识当前节点和当前节点的父节点
            dt.Columns.Add("ID");
            dt.Columns.Add("PARENTID");

//第一列数据的名称
            dt.Columns.Add("NAME");

//第二列（节点编码的名称）
            dt.Columns.Add("CODE");

//第三列（其他）
            dt.Columns.Add("OTHERS");
            #endregion

#region 添加数据

//第一行数据
            DataRow dr1 = dt.NewRow();
            dr1["ID"] = 1;
            dr1["PARENTID"] = DBNull.Value;
            dr1["NAME"] = "根节点1";
            dr1["CODE"] = "根节点1编码";
            dr1["OTHERS"] = "根节点1的其他信息";
            dt.Rows.Add(dr1);

//第二行数据
            DataRow dr2 = dt.NewRow();
            dr2["ID"] = 2;
            dr2["PARENTID"] = 1;
            dr2["NAME"] = "当前节点2";
            dr2["CODE"] = "当前节点2编码";
            dr2["OTHERS"] = "当前节点2的其他信息";
            dt.Rows.Add(dr2);

//第三行数据
            DataRow dr3 = dt.NewRow();
            dr3["ID"] = 3;
            dr3["PARENTID"] = 1;
            dr3["NAME"] = "当前节点3";
            dr3["CODE"] = "当前节点3编码";
            dr3["OTHERS"] = "当前节点3的其他信息";
            dt.Rows.Add(dr3);

//第四行数据
            DataRow dr4 = dt.NewRow();
            dr4["ID"] = 4;
            dr4["PARENTID"] = DBNull.Value;
            dr4["NAME"] = "根节点2";
            dr4["CODE"] = "根节点2编码";
            dr4["OTHERS"] = "根节点2的其他信息";
            dt.Rows.Add(dr4);

//第五行数据
            DataRow dr5 = dt.NewRow();
            dr5["ID"] = 5;
            dr5["PARENTID"] = 4;
            dr5["NAME"] = "当前节点5";
            dr5["CODE"] = "当前节点5编码";
            dr5["OTHERS"] = "当前节点5的其他信息";
            dt.Rows.Add(dr5);

//第六行数据
            DataRow dr6 = dt.NewRow();
            dr6["ID"] = 6;
            dr6["PARENTID"] = 4;
            dr6["NAME"] = "当前节点6";
            dr6["CODE"] = "当前节点6编码";
            dr6["OTHERS"] = "当前节点6的其他信息";
            dt.Rows.Add(dr6);
            #endregion

#region 绑定数据源并设置列名
            this.treeList2.DataSource = dt;
            this.treeList2.KeyFieldName = "ID";
            this.treeList2.ParentFieldName = "PARENTID";

//这句一定要写在上面两句的下面
            this.treeList2.Columns[0].Caption = "节点名称";
            this.treeList2.Columns[1].Caption = "节点编码";
            this.treeList2.Columns[2].Caption = "节点其他信息";
            #endregion

return dt;
        }