DevExpress20：XtraCharts控件实现图表

DevExpress.XtraCharts.XYDiagram xyDiagram1 = (XYDiagram)this.chartControl1.Diagram;          
xyDiagram1.AxisX.Range.MaxValueInternal = 3; //这个属性在设计视图里面是看不到的，只有代码里面才可以设置。
xyDiagram1.AxisX.Range.MinValueInternal = -0.5D;

AxisX ax = (XYDiagram)chartControl1.Diagram;
ax.GridSpacingAuto = false;
ax.DateTimeMeasureUnit = DateTimeMeasurementUnit.Minute;这个可以根据你自己的情况设置
ax.DateTimeGridAlignment = DateTimeMeasurementUnit.Second; 这个是间隔单位
ax.GridSpacing = 10;  每10秒为一个间隔。

private DataTable CreateChartData()
 {
     DataTable dtData = SqlHelper.GetDataSet(sql,parameters).Tables[0];
     DataTable table = new DataTable("Table1");
     table.Columns.Add(Name",typeof(String));
     table.Columns.Add(Value(Double));
     foreach (DataRow item in dtData.Rows)
     {
         var array = new object[] { item[value_num"],item[count] };
         table.Rows.Add(array);
     }
     return table;
 }

/// <summary>
/// 根据数据创建一个饼状图
</summary>
<returns></returns>
private void BuilderDevChart()
{
    清空ChartControl控件
    chartControl1.Series.Clear();
    Series _pieSeries = new Series(学生成绩饼状图,ViewType.Pie);
    _pieSeries.ArgumentDataMember = ";  绑定图表的横坐标  
    _pieSeries.ValueDataMembers[0] = 绑定图表的纵坐标坐标
    _pieSeries.DataSource = CreateChartData(CourseID);
    chartControl1.Series.Add(_pieSeries);
    chartControl1.AddTitle();
    _pieSeries.LegendPointOptions.PointView = PointView.ArgumentAndValues;
    ChartUtils.SetPieNumber(_pieSeries);
}

饼状Series设置成百分比显示 <param name="series">Series</param> public static void SetPiePercentage( Series series) { if (series.View is PieSeriesView) { ((PiePointOptions)series.PointOptions).PercentOptions.ValueAsPercent = true; ((PiePointOptions)series.PointOptions).ValueNumericOptions.Format = NumericFormat.Percent; ((PiePointOptions)series.PointOptions).ValueNumericOptions.Precision = ; } } 饼状Series设置显示格式，是以数字还是百分号显示 SetPieNumber(Series series) { PieSeriesView) { 设置为值 ((PiePointOptions)series.PointOptions).PercentOptions.ValueAsPercent = NumericFormat.Number; ((PiePointOptions)series.PointOptions).ValueNumericOptions.Precision = ; } }

创建数据 DataTable CreateBarData() { string sql = string.Format(@" SELECT c.CollegeName,COUNT(*) FROM studentmanager.student LEFT JOIN college AS c ON c.CollegeID=student.CollegeID GROUP BY c.CollegeID); DataSet ds = _db.GetResult(sql); if (ds != null) { DataTable dtData = ds.Tables[]; DataTable table = ); table.Columns.Add(typeof(string)); table.Columns.Add(int)); dtData.Rows) { CollegeNameCOUNT(*)] }; table.Rows.Add(array); } table; } else { return ; } }

BuilderDevBarChart() { chartControl2.Series.Clear(); Series _barSeries = """;x轴 _barSeries.ValueDataMembers[Y轴 _barSeries.DataSource = CreateBarData(); _barSeries.SetColorEach(); chartControl2.Series.Add(_barSeries);

    _barSeries.LegendPointOptions.PointView = PointView.ArgumentAndValues;

    chartControl2.SetXLableAngle(-35);
    chartControl2.SetCrosshair();

    chartControl2.Legend.Direction = LegendDirection.LeftToRight;
    chartControl2.Legend.AlignmentHorizontal = LegendAlignmentHorizontal.Center;
    chartControl2.Legend.AlignmentVertical = LegendAlignmentVertical.BottomOutside;
    chartControl2.AddTitle(学院学生数量柱状图);
}

class ChartUtils { <summary> 增加数据筛选 </summary> <param name="SeriesBase"></param> <param name="columnName">列名称<param name="value">列名称对应的筛选数值<param name="dataFilterCondition">DataFilterCondition枚举</param> void AddDataFilter(this SeriesBase series,255);">string columnName,255);">object value,DataFilterCondition dataFilterCondition) { series.DataFilters.Add(new DataFilter(columnName,value.GetType().FullName,dataFilterCondition,value)); } 设置X轴Lable角度 <param name="chart">ChartControl<param name="angle">角度void SetXLableAngle(this ChartControl chart,0);"> angle) { XYDiagram _xyDiagram = (XYDiagram)chart.Diagram; if (_xyDiagram != ) _xyDiagram.AxisX.Label.Angle = angle; } 设置Y轴Lable角度 void SetYLableAngle( (XYDiagram)chart.Diagram; _xyDiagram.AxisY.Label.Angle = angle; } 设置ColorEach <param name="colorEach">是否设置成ColorEachvoid SetColorEach(this Series series,255);">bool colorEach) { SeriesViewColorEachSupportBase colorEachView = (SeriesViewColorEachSupportBase)series.View; if (colorEachView != ) { colorEachView.ColorEach = colorEach; } } 设置是否显示十字标线 <param name="crosshair">是否显示十字标线void SetCrosshair( crosshair) { chart.CrosshairEnabled = crosshair ? DefaultBoolean.True : DefaultBoolean.False; chart.CrosshairOptions.ShowArgumentLabels = crosshair; chart.CrosshairOptions.ShowArgumentLine = crosshair; chart.CrosshairOptions.ShowValueLabels = crosshair; chart.CrosshairOptions.ShowValueLine = crosshair; } 新增ChartControl的Title文字 <param name="title">Title文字void AddTitle( title) { chart.Titles.Clear(); 先清除以前的标题 ChartTitle _title = ChartTitle(); _title.Text = title; chart.Titles.Add(_title); } 饼状Series设置成百分比显示 Series series) { PieSeriesView) { ((PiePointOptions)series.PointOptions).PercentOptions.ValueAsPercent = ; ((PiePointOptions)series.PointOptions).ValueNumericOptions.Format = NumericFormat.Percent; ((PiePointOptions)series.PointOptions).ValueNumericOptions.Precision = ; } } 饼状Series设置显示格式，是以数字还是百分号显示 SetPieNumber(Series series) { PieSeriesView) { 设置为值 ((PiePointOptions)series.PointOptions).PercentOptions.ValueAsPercent = NumericFormat.Number; ((PiePointOptions)series.PointOptions).ValueNumericOptions.Precision = ChartControl设置标题 <param name="chartControl"></param> <param name="HTitle"></param> void SetHZTitle(ref ChartControl chartControl,0);"> HTitle) { chartControl.Titles.Clear(); 先清除以前的标题 横标题设置 ChartTitle titles = new ChartTitle(); 声明标题 titles.Text = HTitle; 名称 titles.TextColor = System.Drawing.Color.Black; 颜色 titles.Indent = 5; 设置距离 值越小柱状图就越大 titles.Font = new Font(Tahoma14,FontStyle.Bold); 设置字体 titles.Dock = ChartTitleDockStyle.Top; 设置对齐方式 titles.Alignment = StringAlignment.Center; 居中对齐 chartControl.Titles.Add(titles); 添加标题 } }

void chartControl1_CustomDrawAxisLabel( sender,CustomDrawAxisLabelEventArgs e) { AxisBase axis = e.Item.Axis; if (axis is AxisY || axis is AxisY3D || axis RadarAxisY) { double axisValue = (double)e.Item.AxisValue; if (axisValue < ) { e.Item.TextColor = Color.Red; } else if (axisValue > ) { e.Item.Text = +" + e.Item.Text; e.Item.TextColor = Color.Green; } if (axisValue == Zero; } } }

void chartControl1_ObjectHotTracked(if (e.AdditionalObject AxisTitle) { MessageBox.Show(e.AdditionalObject.GetType().ToString()); } }

void chartControl1_CustomDrawSeries( Find all Bar Series by their view type,and fill them with Aqua color. if (e.Series.View BarSeriesView) e.SeriesDrawOptions.Color = Color.Aqua; Find the series by its name,and change its line style to dash-dot-dot. (Here it‘s assumed that the series view type is LineSeriesView). if (e.Series.Name == Line Series) ((LineDrawOptions)e.SeriesDrawOptions).LineStyle.DashStyle = DevExpress.XtraCharts.DashStyle.DashDotDot; Find all Point Series by the type of its DrawOptions,and change their marker kind to diamond. if (e.SeriesDrawOptions.GetType() == (PointDrawOptions)) ((PointDrawOptions)e.SeriesDrawOptions).Marker.Kind = MarkerKind.Diamond; }

void chartControl1_CustomDrawSeriesPoint( These changes will be applied to Bar Series only. BarDrawOptions drawOptions = e.SeriesDrawOptions as BarDrawOptions; if (drawOptions == ) ; Get the fill options for the series point. drawOptions.FillStyle.FillMode = DevExpress.XtraCharts.FillMode.Gradient; RectangleGradientFillOptions options = drawOptions.FillStyle.Options RectangleGradientFillOptions; if (options == Get the value at the current series point. double val = e.SeriesPoint[]; If the value is less than 1,hide the point‘s label. if (e.SeriesPoint[0] < 1) { e.LabelText = ; } If the value is less than 2.5,then fill the bar with green colors. if (val < 2.5) { options.Color2 = Color.FromArgb(154,128);">196,128);">84); drawOptions.Color = Color.FromArgb(81,128);">137,128);">3); drawOptions.Border.Color = Color.FromArgb(100,128);">39,128);">91,0);">); } ... if the value is less than 5.5,then fill the bar with yellow colors. 5.5254,128);">233,128);">124249,128);">170,128);">1560,128);">165,128);">73,128);">5 ... if the value is greater,then fill the bar with red colors. { options.Color2 = Color.FromArgb(242,128);">143,128);">112199,128);">57,128);">12155,128);">26,0);">); } }

if (chartControlidx.IsPrintingAvailable) 是否能被打印或输出 { Exports to a PDF file. chartControlidx.ExportToPdf(path); Exports to a stream as PDF. System.IO.FileStream pdfStream = System.IO.FileStream(path,System.IO.FileMode.Create); chartControlidx.ExportToPdf(pdfStream); ... pdfStream.Close(); }

{ Create an image in the specified format from the chart and save it to the specified path. chartControlidx.ExportToImage(path,System.Drawing.Imaging.ImageFormat.Png); png格式 }