protected void Page_Load(object sender, EventArgs e)
{

if (!NThinChartControl1.Initialized){

// get the default chart
NChart chart = NThinChartControl1.Charts[0];

// add bar serires to the chart
NBarSeries bar = new NBarSeries();

chart.Series.Add(bar);

// add one bar
bar.Values.Add(10);

bar.FillStyle = new NColorFillStyle(Color.Blue);
bar.InteractivityStyle = new NInteractivityStyle("Click on me to make me red");

NPostbackTool postbackTool = new NPostbackTool();
postbackTool.PostbackOnlyOnInteractiveItems = true;

NThinChartControl1.Controller.Tools.Add(postbackTool);
NThinChartControl1.Controller.Tools.Add(new NTooltipTool());

}

NThinChartControl1.Postback += new Nevron.ThinWeb.NPostbackEventHandler(NThinChartControl1_Postback);

}

void NThinChartControl1_Postback(object sender, Nevron.ThinWeb.NPostbackEventArgs e)

{

NThinChartControl chartControl = (NThinChartControl)sender;

// hit test

NHitTestResult hitTestResult = chartControl.HitTest(e.MousePosition.X, e.MousePosition.Y);

NBarSeries bar = (NBarSeries)chartControl.Charts[0].Series[0];

if (hitTestResult.ChartElement == ChartElement.DataPoint)

{

bar.FillStyle = new NColorFillStyle(Color.Red);

}

}

protected void Page_Load(object sender, EventArgs e)

{

if (!NThinDiagramControl1.Initialized)
{

// init the document
NDrawingDocument document = NThinDiagramControl1.Document;

document.BeginInit();
document.BackgroundStyle.FrameStyle.Visible = false;
document.AutoBoundsPadding = new Nevron.Diagram.NMargins(10f, 10f, 10f, 10f);
document.Style.FillStyle = new NColorFillStyle(Color.White);

NBasicShapesFactory factory = new NBasicShapesFactory(document);
NShape circle = factory.CreateShape(BasicShapes.Circle);
circle.Bounds = new NRectangleF(0f, 0f, 200f, 200f);

// apply interactivity
circle.Style.InteractivityStyle = new NInteractivityStyle("Click on me to make me red");
document.ActiveLayer.AddChild(circle);
NThinDiagramControl1.SizeToContent();

// configure the controller
NPostbackTool postbackTool = new NPostbackTool();
postbackTool.PostbackOnlyOnInteractiveItems = true;
NThinDiagramControl1.Controller.Tools.Add(postbackTool);
NThinDiagramControl1.Controller.Tools.Add(new NTooltipTool());
}

NThinDiagramControl1.Postback += new Nevron.ThinWeb.NPostbackEventHandler(NThinDiagramControl1_Postback);

}

void NThinDiagramControl1_Postback(object sender, Nevron.ThinWeb.NPostbackEventArgs e)
{

NThinDiagramControl diagramControl = (NThinDiagramControl)sender;
NNodeList affectedNodes = diagramControl.HitTest(new NPointF(e.MousePosition.X, e.MousePosition.Y));
NNodeList affectedShapes = affectedNodes.Filter(Nevron.Diagram.Filters.NFilters.Shape2D);

int length = affectedShapes.Count;

for (int i = 0; i < length; i++)
{

NShape shape = affectedShapes[i] as NShape;

if (shape != null)
{
shape.Style.FillStyle = new NColorFillStyle(Color.Red);
}
}
}