彩票走势图

使用Spread.Net可以将图表绑定到下列数据源：

• Array
• Array List (IList)
• List Collection
• Table

当图表绑定到数据时,数据就会在图表上动态呈现出来。一个单一的图表可以支持(并显示)来自多个数据源和一个数据源内的多个数据字段的数据。为了获取更多的关于DataSource属性的信息,最好在Assembly Reference中指定图表类型(例如:在RadarLineSeries类的SeriesNameDataSource)。

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下面是将控件绑定到数据源的代码片段。

C#

// Create an array and bind the control.
object[] values = new object[] { 2, 4.0, 3.0m, "5.0" };
BarSeries series = new BarSeries();
series.Values.DataSource = values;

VB

' Create an array and bind the control.
Dim values() As Object = {2, 4.0, 3.0D, "5.0"}
Dim series As New BarSeries()
series.Values.DataSource = values

下面是将控件绑定到数据表格的代码片段：

C#

System.Data.DataTable dt = new System.Data.DataTable("Test");
System.Data.DataRow dr = default(System.Data.DataRow);
dt.Columns.Add("Series0");
dt.Columns.Add("Series1");
dr = dt.NewRow();
dr[0] = 2;
dr[1] = 1;
dt.Rows.Add(dr);
dr = dt.NewRow();
dr[0] = 4;
dr[1] = 2;
dt.Rows.Add(dr);
dr = dt.NewRow();
dr[0] = 3;
dr[1] = 4;
FarPoint.Web.Chart.BarSeries series = new FarPoint.Web.Chart.BarSeries();
series.Values.DataSource = dt;
series.Values.DataField = dt.Columns[0].ColumnName;
FarPoint.Web.Chart.YPlotArea plotArea = new FarPoint.Web.Chart.YPlotArea();
FarPoint.Web.Chart.ChartModel model = new FarPoint.Web.Chart.ChartModel();
plotArea.Location = new System.Drawing.PointF(0.2F, 0.2F);
plotArea.Size = new System.Drawing.SizeF(0.6F, 0.6F);
plotArea.Series.Add(series);
model.PlotAreas.Add(plotArea);
FarPoint.Web.Spread.Chart.SpreadChart chart = new FarPoint.Web.Spread.Chart.SpreadChart();
chart.Model = model;
FpSpread1.Sheets[0].Charts.Add(chart);

Dim dt As New System.Data.DataTable("Test")
Dim dr As System.Data.DataRow
dt.Columns.Add("Series0")
dt.Columns.Add("Series1")
dr = dt.NewRow()
dr(0) = 2
dr(1) = 1
dt.Rows.Add(dr)
dr = dt.NewRow()
dr(0) = 4
dr(1) = 2
dt.Rows.Add(dr)
dr = dt.NewRow()
dr(0) = 3
dr(1) = 4
dt.Rows.Add(dr)
Dim series As New FarPoint.Web.Chart.BarSeries
series.Values.DataSource = dt
series.Values.DataField = dt.Columns(0).ColumnName
Dim model As New FarPoint.Web.Chart.ChartModel()
Dim plotArea As New FarPoint.Web.Chart.YPlotArea()
plotArea.Location = New System.Drawing.PointF(0.2F, 0.2F)
plotArea.Size = New System.Drawing.SizeF(0.6F, 0.6F)
plotArea.Series.Add(series)
model.PlotAreas.Add(plotArea)
Dim chart As New FarPoint.Web.Spread.Chart.SpreadChart()
chart.Model = model
FpSpread1.Sheets(0).Charts.Add(chart)