📄 postrenderlabeling.aspx
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<%@ Import Namespace="System.Drawing" %>
<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>
<%@ Page Language="C#" Debug="true" Description="dotnetCHARTING Component" %>
<%@ Import Namespace="System.Drawing" %>
<%@ Import Namespace="System.Drawing.Text" %>
<HTML>
<HEAD>
<TITLE>Post Render Drawing Image</TITLE>
<script runat="server">
void Page_Load(Object sender,EventArgs e)
{
//dotnetCHARTING.Chart Chart = new dotnetCHARTING.Chart();
Chart.Type = ChartType.Combo;//Horizontal;
Chart.Width = 600;
Chart.Height = 350;
Chart.TempDirectory = "temp";
Chart.DefaultSeries.Type = SeriesType.Bubble;
Chart.Title = "Label elements after the chart is generated.";
// This sample shows how element can be labeled after the chart image was created.
// *DYNAMIC DATA NOTE*
// This sample uses random data to populate the chart. To populate
// a chart with database data see the following resources:
// - Classic samples folder
// - Help File > Data Tutorials
// - Sample: features/DataEngine.aspx
SeriesCollection s = getRandomData();
// Add the random data.
Chart.SeriesCollection.Add(s);
//Get a bitmap of the chart.
Bitmap bmp = Chart.GetChartBitmap();
// Create a graphics object from the bitmap
Graphics g = Graphics.FromImage(bmp);
g.TextRenderingHint = TextRenderingHint.AntiAlias;
// After the chart is generated, the element's positions are available.
// Lets iterate the elements we have added and draw a centered label at their positions.
// String format to center the labels.
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
for(int i = 0; i < s.Count; i++)
{
for(int ib = 0; ib < s[i].Elements.Count;ib++)
{
Element el = s[i].Elements[ib];
g.DrawString(el.Name,new Font("Arial",8),Brushes.Black,el.Point,sf);
}
}
// Clean up
g.Dispose();
//Save the image using the FileManager.
Chart.FileManager.SaveImage(bmp);
}
SeriesCollection getRandomData()
{
SeriesCollection SC = new SeriesCollection();
Random myR = new Random();
for(int a = 0; a < 1; a++)
{
Series s = new Series();
s.Name = "Series " + (a+1);
for(int b = 0; b < 4; b++)
{
{
Element e = new Element("Element " + b, myR.Next(50));
e.BubbleSize = myR.Next(50);
s.Elements.Add(e);
}
}
SC.Add(s);
}
return SC;
}
</script>
</HEAD>
<BODY>
<DIV align="center">
<dotnet:Chart id="Chart" runat="server" Width="568px" Height="344px" Depth="13px" Use3D="True">
</dotnet:Chart>
</DIV>
</BODY>
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