step1：构造数据

  private DataSet GetTestData()
        {
            DataSet dataSet = new DataSet();

            DataTable dataTableSeries = new DataTable("BusinessProcess");

            dataTableSeries.Columns.Add("业务过程", typeof(string));
            dataTableSeries.Columns.Add("UsedPT", typeof(string));
            dataTableSeries.Columns.Add("GeneratePT", typeof(string));

            dataTableSeries.Rows.Add(new object[] { "业务过程", "T", "T" });

            DataTable dataTableSpinoffs = new DataTable("Spinoffs");

            dataTableSpinoffs.Columns.Add("ParentRecord", typeof(string));
            dataTableSpinoffs.Columns.Add("业务过程", typeof(string));

            dataTableSpinoffs.Columns.Add("UsedPT", typeof(string));
            dataTableSpinoffs.Columns.Add("GeneratePT", typeof(string));

            dataTableSpinoffs.Rows.Add(new object[] { "业务过程", "规划计划A", "F", "T" });
            dataTableSpinoffs.Rows.Add(new object[] { "业务过程", "规划计划B", "F", "F" });
            dataTableSpinoffs.Rows.Add(new object[] { "业务过程", "规划计划C", "T", "F" });
            dataTableSpinoffs.Rows.Add(new object[] { "规划计划A", "勘探规划a", "F", "F" });
            dataTableSpinoffs.Rows.Add(new object[] { "规划计划A", "勘探计划a", "T", "F" });
            dataTableSpinoffs.Rows.Add(new object[] { "规划计划B", "勘探规划b", "F", "T" });
            dataTableSpinoffs.Rows.Add(new object[] { "规划计划B", "勘探计划b", "F", "F" });
            dataTableSpinoffs.Rows.Add(new object[] { "规划计划C", "勘探规划c", "T", "F" });
            dataTableSpinoffs.Rows.Add(new object[] { "勘探规划a", "中长期油气勘探规划", "F", "F" });
            dataTableSpinoffs.Rows.Add(new object[] { "勘探规划a", "五年期油气勘探滚动规划", "T", "T" });
            dataTableSpinoffs.Rows.Add(new object[] { "勘探计划b", "年度勘探计划", "T", "T" });
            dataTableSpinoffs.Rows.Add(new object[] { "勘探计划b", "年度勘探部署", "T", "F" });
            dataTableSpinoffs.Rows.Add(new object[] { "勘探计划b", "年度部署调整", "F", "T" });

            dataSet.Tables.Add(dataTableSeries);
            dataSet.Tables.Add(dataTableSpinoffs);

            dataSet.Relations.Add("dataTableSeries", dataTableSeries.Columns["业务过程"], dataTableSpinoffs.Columns["ParentRecord"], false);
            dataSet.Relations.Add("SpinoffToSpinoff", dataTableSpinoffs.Columns["业务过程"], dataTableSpinoffs.Columns["ParentRecord"], false);
            return dataSet;
        }

step2：绑定数据源

            this.ultraTree1.ViewStyle = ViewStyle.OutlookExpress;
            this.ultraTree1.DataSource = GetTestData();
            this.ultraTree1.DataMember = "BusinessProcess";

step3：设置列宽（或使列自适应）

     //实现列的自适应（好像不怎么起作用）
     // this.ultraTree1.ColumnSettings.AutoFitColumns = AutoFitColumns.ResizeAllColumns;
     //设置列宽（这个比较好用）
     this.ultraTree1.ColumnSettings.ColumnSets[0].Columns[0].LayoutInfo.PreferredLabelSize = new Size(250, 0);

There is no way to auto-size columns except when using the OutlookExpress ViewStyle:

this.ultraTree1.ColumnSettings.AutoFitColumns = AutoFitColumns.ResizeAllColumns;

其他的样式需要手动设置列的size

step4：隐藏某些列

UltraTree1.ColumnSettings.ColumnSets(X).Columns(Y).Visible = False