Occurs before the control renders the map area to HTML.
Syntax
Event Data
The event handler receives an argument of type BeforeRenderMapAreasEventArgs containing data related to this event. The following BeforeRenderMapAreasEventArgs properties provide information specific to this event.
Property | Description |
---|
MapAreas | Gets or sets the collection contains MapArea definitions. |
Example
This example uses the BeforeRenderMapAreas event.
C# | Copy Code |
---|
protected void Page_Load(object sender, EventArgs e)
{
FpChart1.RenderMapArea = true;
FpChart1.BeforeRenderMapAreas+=new FarPoint.Web.Chart.BeforeRenderMapAreasHandler(FpChart1_BeforeRenderMapAreas);
FarPoint.Web.Chart.BarSeries series = new FarPoint.Web.Chart.BarSeries();
series.SeriesName = "Series 0";
series.Values.Add(2.0);
series.Values.Add(4.0);
series.Values.Add(3.0);
series.Values.Add(5.0);
FarPoint.Web.Chart.YPlotArea plotArea = 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);
FarPoint.Web.Chart.LabelArea label = new FarPoint.Web.Chart.LabelArea();
label.Text = "Bar Chart";
label.Location = new System.Drawing.PointF(0.5f, 0.02f);
label.AlignmentX = 0.5f;
label.AlignmentY = 0.0f;
FarPoint.Web.Chart.LegendArea legend = new FarPoint.Web.Chart.LegendArea();
legend.Location = new System.Drawing.PointF(0.98f, 0.5f);
legend.AlignmentX = 1.0f;
legend.AlignmentY = 0.5f;
FarPoint.Web.Chart.ChartModel model = new FarPoint.Web.Chart.ChartModel();
model.LabelAreas.Add(label);
model.LegendAreas.Add(legend);
model.PlotAreas.Add(plotArea);
FpChart1.Model = model;
}
protected void FpChart1_BeforeRenderMapAreas(object sender, FarPoint.Web.Chart.BeforeRenderMapAreasEventArgs e)
{
string scriptFormat = "showHitTestInfo('{0}','{1}','{2}');";
foreach (FarPoint.Web.Chart.MapArea item in e.MapAreas)
{
FarPoint.Web.Chart.SeriesHitTest ht = this.FpChart1.HitTest(FarPoint.Web.Chart.MapAreaInfo.Parse(item.MapAreaInfo)) as FarPoint.Web.Chart.SeriesHitTest;
if (ht != null)
{
string script = string.Format(scriptFormat, ht.Series.SeriesName, ((FarPoint.Web.Chart.BarSeries)ht.Series).CategoryNames[ht.PointIndex], ((FarPoint.Web.Chart.BarSeries)ht.Series).Values[ht.PointIndex]);
item.Attributes.Add("onmouseover", script);
}
}
}
ASPX Page:
<script type="text/javascript">
function showHitTestInfo(seriesName, category, value) {
alert(seriesName);
alert(category);
alert(value);
};
</script> |
Visual Basic | Copy Code |
---|
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If (Me.IsPostBack) Then Return
FpChart1.RenderMapArea = True
Dim series As New FarPoint.Web.Chart.BarSeries()
series.SeriesName = "Series 0"
series.Values.Add(2.0)
series.Values.Add(4.0)
series.Values.Add(3.0)
series.Values.Add(5.0)
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)
Dim label As New FarPoint.Web.Chart.LabelArea()
label.Text = "Bar Chart"
label.Location = New System.Drawing.PointF(0.5F, 0.02F)
label.AlignmentX = 0.5F
label.AlignmentY = 0.0F
Dim legend As New FarPoint.Web.Chart.LegendArea()
legend.Location = New System.Drawing.PointF(0.98F, 0.5F)
legend.AlignmentX = 1.0F
legend.AlignmentY = 0.5F
Dim model As New FarPoint.Web.Chart.ChartModel()
model.LabelAreas.Add(label)
model.LegendAreas.Add(legend)
model.PlotAreas.Add(plotArea)
FpChart1.Model = model
End Sub
Protected Sub FpChart1_BeforeRenderMapAreas(ByVal sender As Object, ByVal e As FarPoint.Web.Chart.BeforeRenderMapAreasEventArgs) Handles FpChart1.BeforeRenderMapAreas
Dim scriptFormat As String = "showHitTestInfo('{0}','{1}','{2}');"
For Each item As FarPoint.Web.Chart.MapArea In e.MapAreas
Dim ht As FarPoint.Web.Chart.SeriesHitTest = TryCast(Me.FpChart1.HitTest(FarPoint.Web.Chart.MapAreaInfo.Parse(item.MapAreaInfo)), FarPoint.Web.Chart.SeriesHitTest)
If ht IsNot Nothing Then
Dim script As String = String.Format(scriptFormat, ht.Series.SeriesName, DirectCast(ht.Series, FarPoint.Web.Chart.BarSeries).CategoryNames(ht.PointIndex), DirectCast(ht.Series, FarPoint.Web.Chart.BarSeries).Values(ht.PointIndex))
item.Attributes.Add("onmouseover", script)
End If
Next
End Sub
ASPX Page:
<script type="text/javascript">
function showHitTestInfo(seriesName, category, value) {
alert(seriesName);
alert(category);
alert(value);
};
</script> |
Requirements
Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family
See Also