winfrom中dev控件画chart图

dev控件是非常强大的一个插件，利用dev控件画一个柱状图

public void chart()//图表

        {

            string[] outParams;

            DataTable dt = COM_PROXY.ExecuteProc("LTRON_RPT_R205_CHART", new string[] {

               this.txtUNIT_ID.EditValue.ToStringEx().Trim(),   --数据库传入的参数，查询的条件参数（点击查询后才会有柱状图）

               this.txtUNIT_SN.EditValue.ToStringEx().Trim(),

               txtDateFrom.Text.ToString(),0

               txtDateTO.Text.ToString()

            }, out outParams);

 

            chartControl1.Series.Clear();

 

            if (dt != null && dt.Rows.Count > 0)

            {

                Series chart1 = new Series("不良数量", ViewType.Bar);//legned头

                chart1.DataSource = dt;

                chart1.ArgumentScaleType = ScaleType.Qualitative;

 

                chart1.ArgumentDataMember = "DEFECT_CODE";//数据库字段              

                chart1.ValueScaleType = ScaleType.Numerical;

 

                chart1.ValueDataMembers.AddRange(new string[] { "QTY" });

                chartControl1.Series.Add(chart1);

                                          

                ((SideBySideBarSeriesLabel)chart1.Label).Border.Color = System.Drawing.Color.Transparent;//柱状图边框背景颜色为透明

                ((SideBySideBarSeriesLabel)chart1.Label).Border.Visibility = DevExpress.Utils.DefaultBoolean.True;//显示边框

                ((SideBySideBarSeriesLabel)chart1.Label).LineVisibility = DevExpress.Utils.DefaultBoolean.True;//显示边框与柱子的连接线

                ((SideBySideBarSeriesLabel)chart1.Label).Position = BarSeriesLabelPosition.Top;//显示在最上方

                ((SideBySideBarSeriesLabel)chart1.Label).ShowForZeroValues = true;

             

                //((SideBySideBarSeriesView)chart1.View).Color = Color.Green;柱状图背景颜色

 

                chart1.LabelsVisibility = DevExpress.Utils.DefaultBoolean.True;//显示加载信息

 

            }

        }

 

******************* 页签点击事件（点击页签才显示柱状 图）************************************************************

der, DevExpress.XtraTab.TabPageChangedEventArgs e)

        {

            if(xtraTabPage4.SelectedTabPageIndex ==1)

            {

                chart();

            }

        }