dev控件显示柱状图的简单例子.doc

一、绑定实体到图表Step1Step2数据源显示数据二、后台查询数据绑定到bingdingsourepublic void Init() /通过查询数据库 取得值 DataTable dt = updateEmp.queryEMp(); this.bindingSource1.DataSource = dt; chartControl2.Series.Clear(); Series Series1 = new Series(工资, ViewType.Bar); Series1.ArgumentScaleType = ScaleType.Qualitative; Series1.ArgumentDataMember = 姓名; Series1.ValueScaleType = ScaleType.Numerical; Series1.ValueDataMembersSerializable = 工资; Series1.View.Color = Color.Red; chartControl2.Series.Add(Series1); Series1.LabelsVisibility = DevExpress.Utils.DefaultBoolean.True; Step1Step2Step3三、无数据绑定的图表后台查询数据显示public void Init() chartControl2.Series.Clear(); Series series1 = new Series(工资, ViewType.Bar); Series series2 = new Series(奖金, ViewType.Bar); chartControl2.Series.Add(series1); chartControl2.Series.Add(series2); /获取曲线图所要显示的数据 UpdateIronInfo updateIronInfo = new UpdateIronInfo(); DataTable dt = updateEmp.queryEMp(); SeriesPoint point = null; foreach (DataRow row in dt.Rows) if (row姓名.ToString() != null) point = new SeriesPoint(row姓名.ToString(); double vals = Convert.ToDouble(row工资.ToString() ; point.Values = vals; series1.Points.Add(point); if (row奖金.ToString()!=null) point = new SeriesPoint(row姓名.ToString(); double vals = Convert.ToDouble(row奖金.ToString() ; point.Values = vals; series2.Points.Add(point); BarSeriesView sv1 = (BarSeriesView)series1.View; BarSeriesView sv2 = (BarSeriesView)series2.View; sv1.BarWidth