Public Property DataField As String

Dim instance As DoubleCollection
Dim value As String
 
instance.DataField = value
 
value = instance.DataField

public string DataField {get; set;}

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)