ChartDirector 7.1 (.NET Edition)

Contour Color Legend




This example demonstrates using a legend box to display the color legend, which is useful for irregularly spaced color scale or for long color labels.

Many of the examples in the documentation uses ColorAxis to both define and display the color scale. This is useful for evenly spaced contours, which are associated with the ticks and labels on the color axis. If the contours are highly uneven (such as at 0, 1, 2, 50, 195, 200), the labels are also unevenly spaced on the color axis, and some labels may become so close together that they overlap.

This example demonstrates an alternative method of using a LegendBox to display color legends. The color axis still defines the color scale, but it is not displayed

Source Code Listing

[Windows Forms - C# version] NetWinCharts\CSharpWinCharts\contourlegend.cs
using System; using ChartDirector; namespace CSharpChartExplorer { public class contourlegend : DemoModule { //Name of demo module public string getName() { return "Contour Color Legend"; } //Number of charts produced in this demo module public int getNoOfCharts() { return 1; } //Main code for creating chart. //Note: the argument chartIndex is unused because this demo only has 1 chart. public void createChart(WinChartViewer viewer, int chartIndex) { // The x and y coordinates of the grid double[] dataX = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; double[] dataY = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; // Use random numbers for the z values on the XY grid RanSeries r = new RanSeries(999); double[] dataZ = r.get2DSeries(dataX.Length, dataY.Length, -0.9, 1.15); // Create a XYChart object of size 640 x 460 pixels XYChart c = new XYChart(640, 460); // Set default text color to dark grey (0x333333) c.setColor(Chart.TextColor, 0x333333); // Set the plotarea at (30, 25) and of size 400 x 400 pixels. Use semi-transparent grey // (0xdd000000) horizontal and vertical grid lines c.setPlotArea(50, 25, 400, 400, -1, -1, Chart.Transparent, unchecked((int)0xdd000000), -1); // Set the x and y axis stems to transparent and the label font to 12pt Arial c.xAxis().setColors(Chart.Transparent); c.yAxis().setColors(Chart.Transparent); c.xAxis().setLabelStyle("Arial", 12); c.yAxis().setLabelStyle("Arial", 12); // Set the x-axis and y-axis scale c.xAxis().setLinearScale(0, 10, 1); c.yAxis().setLinearScale(0, 10, 1); // Add a contour layer using the given data ContourLayer layer = c.addContourLayer(dataX, dataY, dataZ); // Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer); // Define the color scale double[] colorScale = {-0.8, 0x0066ff, -0.5, 0x66ccff, -0.3, 0x66ffff, 0, 0x88ff88, 0.4, 0x00ff00, 0.7, 0xffff00, 0.9, 0xff6600, 1.0, 0xcc0000, 1.1}; // Apply the color scale, and specify the underflow and overflow colors for regions // exceeding the color scale layer.colorAxis().setColorScale(colorScale, 0x0000cc, 0x000000); // // Instead of displaying the color axis, we use a legend box to display the colors. This // is useful for colors that are unevenly spaced on the color axis. // // Add a legend box at (460, 25) with vertical layout, with 12pt Arial font, transparent // background and border, icon size of 15 x 15 pixels, and line spacing of 8 pixels. LegendBox b = c.addLegend(460, 25, true, "Arial", 12); b.setBackground(Chart.Transparent, Chart.Transparent); b.setKeySize(15, 15); b.setKeySpacing(0, 8); // Add the legend box entries b.addKey("> 1.1 (Critical)", 0x000000); b.addKey("1.0 to 1.1 (Alert)", 0xcc0000); b.addKey("0.9 to 1.0", 0xff6600); b.addKey("0.7 to 0.9", 0xffff00); b.addKey("0.4 to 0.7", 0x00ff00); b.addKey("0.0 to 0.4", 0x88ff88); b.addKey("-0.3 to 0.0", 0x66ffff); b.addKey("-0.5 to -0.3", 0x66ccff); b.addKey("-0.8 to -0.5", 0x0066ff); b.addKey("< -0.8", 0x0000cc); // Output the chart viewer.Chart = c; //include tool tip for the chart viewer.ImageMap = c.getHTMLImageMap("clickable", "", "title='<*cdml*>X: {x|2}<*br*>Y: {y|2}<*br*>Z: {z|2}'"); } } }

[Windows Forms - VB Version] NetWinCharts\VBNetWinCharts\contourlegend.vb
Imports System Imports Microsoft.VisualBasic Imports ChartDirector Public Class contourlegend Implements DemoModule 'Name of demo module Public Function getName() As String Implements DemoModule.getName Return "Contour Color Legend" End Function 'Number of charts produced in this demo module Public Function getNoOfCharts() As Integer Implements DemoModule.getNoOfCharts Return 1 End Function 'Main code for creating chart. 'Note: the argument chartIndex is unused because this demo only has 1 chart. Public Sub createChart(viewer As WinChartViewer, chartIndex As Integer) _ Implements DemoModule.createChart ' The x and y coordinates of the grid Dim dataX() As Double = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} Dim dataY() As Double = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} ' Use random numbers for the z values on the XY grid Dim r As RanSeries = New RanSeries(999) Dim dataZ() As Double = r.get2DSeries(UBound(dataX) + 1, UBound(dataY) + 1, -0.9, 1.15) ' Create a XYChart object of size 640 x 460 pixels Dim c As XYChart = New XYChart(640, 460) ' Set default text color to dark grey (0x333333) c.setColor(Chart.TextColor, &H333333) ' Set the plotarea at (30, 25) and of size 400 x 400 pixels. Use semi-transparent grey ' (0xdd000000) horizontal and vertical grid lines c.setPlotArea(50, 25, 400, 400, -1, -1, Chart.Transparent, &Hdd000000, -1) ' Set the x and y axis stems to transparent and the label font to 12pt Arial c.xAxis().setColors(Chart.Transparent) c.yAxis().setColors(Chart.Transparent) c.xAxis().setLabelStyle("Arial", 12) c.yAxis().setLabelStyle("Arial", 12) ' Set the x-axis and y-axis scale c.xAxis().setLinearScale(0, 10, 1) c.yAxis().setLinearScale(0, 10, 1) ' Add a contour layer using the given data Dim layer As ContourLayer = c.addContourLayer(dataX, dataY, dataZ) ' Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer) ' Define the color scale Dim colorScale() As Double = {-0.8, &H0066ff, -0.5, &H66ccff, -0.3, &H66ffff, 0, &H88ff88, _ 0.4, &H00ff00, 0.7, &Hffff00, 0.9, &Hff6600, 1.0, &Hcc0000, 1.1} ' Apply the color scale, and specify the underflow and overflow colors for regions exceeding ' the color scale layer.colorAxis().setColorScale(colorScale, &H0000cc, &H000000) ' ' Instead of displaying the color axis, we use a legend box to display the colors. This is ' useful for colors that are unevenly spaced on the color axis. ' ' Add a legend box at (460, 25) with vertical layout, with 12pt Arial font, transparent ' background and border, icon size of 15 x 15 pixels, and line spacing of 8 pixels. Dim b As LegendBox = c.addLegend(460, 25, True, "Arial", 12) b.setBackground(Chart.Transparent, Chart.Transparent) b.setKeySize(15, 15) b.setKeySpacing(0, 8) ' Add the legend box entries b.addKey("> 1.1 (Critical)", &H000000) b.addKey("1.0 to 1.1 (Alert)", &Hcc0000) b.addKey("0.9 to 1.0", &Hff6600) b.addKey("0.7 to 0.9", &Hffff00) b.addKey("0.4 to 0.7", &H00ff00) b.addKey("0.0 to 0.4", &H88ff88) b.addKey("-0.3 to 0.0", &H66ffff) b.addKey("-0.5 to -0.3", &H66ccff) b.addKey("-0.8 to -0.5", &H0066ff) b.addKey("< -0.8", &H0000cc) ' Output the chart viewer.Chart = c 'include tool tip for the chart viewer.ImageMap = c.getHTMLImageMap("clickable", "", _ "title='<*cdml*>X: {x|2}<*br*>Y: {y|2}<*br*>Z: {z|2}'") End Sub End Class

[WPF - C#] NetWPFCharts\CSharpWPFCharts\contourlegend.cs
using System; using ChartDirector; namespace CSharpWPFCharts { public class contourlegend : DemoModule { //Name of demo module public string getName() { return "Contour Color Legend"; } //Number of charts produced in this demo module public int getNoOfCharts() { return 1; } //Main code for creating chart. //Note: the argument chartIndex is unused because this demo only has 1 chart. public void createChart(WPFChartViewer viewer, int chartIndex) { // The x and y coordinates of the grid double[] dataX = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; double[] dataY = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; // Use random numbers for the z values on the XY grid RanSeries r = new RanSeries(999); double[] dataZ = r.get2DSeries(dataX.Length, dataY.Length, -0.9, 1.15); // Create a XYChart object of size 640 x 460 pixels XYChart c = new XYChart(640, 460); // Set default text color to dark grey (0x333333) c.setColor(Chart.TextColor, 0x333333); // Set the plotarea at (30, 25) and of size 400 x 400 pixels. Use semi-transparent grey // (0xdd000000) horizontal and vertical grid lines c.setPlotArea(50, 25, 400, 400, -1, -1, Chart.Transparent, unchecked((int)0xdd000000), -1); // Set the x and y axis stems to transparent and the label font to 12pt Arial c.xAxis().setColors(Chart.Transparent); c.yAxis().setColors(Chart.Transparent); c.xAxis().setLabelStyle("Arial", 12); c.yAxis().setLabelStyle("Arial", 12); // Set the x-axis and y-axis scale c.xAxis().setLinearScale(0, 10, 1); c.yAxis().setLinearScale(0, 10, 1); // Add a contour layer using the given data ContourLayer layer = c.addContourLayer(dataX, dataY, dataZ); // Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer); // Define the color scale double[] colorScale = {-0.8, 0x0066ff, -0.5, 0x66ccff, -0.3, 0x66ffff, 0, 0x88ff88, 0.4, 0x00ff00, 0.7, 0xffff00, 0.9, 0xff6600, 1.0, 0xcc0000, 1.1}; // Apply the color scale, and specify the underflow and overflow colors for regions // exceeding the color scale layer.colorAxis().setColorScale(colorScale, 0x0000cc, 0x000000); // // Instead of displaying the color axis, we use a legend box to display the colors. This // is useful for colors that are unevenly spaced on the color axis. // // Add a legend box at (460, 25) with vertical layout, with 12pt Arial font, transparent // background and border, icon size of 15 x 15 pixels, and line spacing of 8 pixels. LegendBox b = c.addLegend(460, 25, true, "Arial", 12); b.setBackground(Chart.Transparent, Chart.Transparent); b.setKeySize(15, 15); b.setKeySpacing(0, 8); // Add the legend box entries b.addKey("> 1.1 (Critical)", 0x000000); b.addKey("1.0 to 1.1 (Alert)", 0xcc0000); b.addKey("0.9 to 1.0", 0xff6600); b.addKey("0.7 to 0.9", 0xffff00); b.addKey("0.4 to 0.7", 0x00ff00); b.addKey("0.0 to 0.4", 0x88ff88); b.addKey("-0.3 to 0.0", 0x66ffff); b.addKey("-0.5 to -0.3", 0x66ccff); b.addKey("-0.8 to -0.5", 0x0066ff); b.addKey("< -0.8", 0x0000cc); // Output the chart viewer.Chart = c; //include tool tip for the chart viewer.ImageMap = c.getHTMLImageMap("clickable", "", "title='<*cdml*>X: {x|2}<*br*>Y: {y|2}<*br*>Z: {z|2}'"); } } }

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\contourlegend.aspx
(Click here on how to convert this code to code-behind style.)
<%@ Page Language="C#" Debug="true" %> <%@ Import Namespace="ChartDirector" %> <%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %> <!DOCTYPE html> <script runat="server"> // // Page Load event handler // protected void Page_Load(object sender, EventArgs e) { // The x and y coordinates of the grid double[] dataX = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; double[] dataY = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; // Use random numbers for the z values on the XY grid RanSeries r = new RanSeries(999); double[] dataZ = r.get2DSeries(dataX.Length, dataY.Length, -0.9, 1.15); // Create a XYChart object of size 640 x 460 pixels XYChart c = new XYChart(640, 460); // Set default text color to dark grey (0x333333) c.setColor(Chart.TextColor, 0x333333); // Set the plotarea at (30, 25) and of size 400 x 400 pixels. Use semi-transparent grey // (0xdd000000) horizontal and vertical grid lines c.setPlotArea(50, 25, 400, 400, -1, -1, Chart.Transparent, unchecked((int)0xdd000000), -1); // Set the x and y axis stems to transparent and the label font to 12pt Arial c.xAxis().setColors(Chart.Transparent); c.yAxis().setColors(Chart.Transparent); c.xAxis().setLabelStyle("Arial", 12); c.yAxis().setLabelStyle("Arial", 12); // Set the x-axis and y-axis scale c.xAxis().setLinearScale(0, 10, 1); c.yAxis().setLinearScale(0, 10, 1); // Add a contour layer using the given data ContourLayer layer = c.addContourLayer(dataX, dataY, dataZ); // Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer); // Define the color scale double[] colorScale = {-0.8, 0x0066ff, -0.5, 0x66ccff, -0.3, 0x66ffff, 0, 0x88ff88, 0.4, 0x00ff00, 0.7, 0xffff00, 0.9, 0xff6600, 1.0, 0xcc0000, 1.1}; // Apply the color scale, and specify the underflow and overflow colors for regions exceeding // the color scale layer.colorAxis().setColorScale(colorScale, 0x0000cc, 0x000000); // // Instead of displaying the color axis, we use a legend box to display the colors. This is // useful for colors that are unevenly spaced on the color axis. // // Add a legend box at (460, 25) with vertical layout, with 12pt Arial font, transparent // background and border, icon size of 15 x 15 pixels, and line spacing of 8 pixels. LegendBox b = c.addLegend(460, 25, true, "Arial", 12); b.setBackground(Chart.Transparent, Chart.Transparent); b.setKeySize(15, 15); b.setKeySpacing(0, 8); // Add the legend box entries b.addKey("> 1.1 (Critical)", 0x000000); b.addKey("1.0 to 1.1 (Alert)", 0xcc0000); b.addKey("0.9 to 1.0", 0xff6600); b.addKey("0.7 to 0.9", 0xffff00); b.addKey("0.4 to 0.7", 0x00ff00); b.addKey("0.0 to 0.4", 0x88ff88); b.addKey("-0.3 to 0.0", 0x66ffff); b.addKey("-0.5 to -0.3", 0x66ccff); b.addKey("-0.8 to -0.5", 0x0066ff); b.addKey("< -0.8", 0x0000cc); // Output the chart WebChartViewer1.Image = c.makeWebImage(Chart.SVG); // Include tool tip for the chart WebChartViewer1.ImageMap = c.getHTMLImageMap("", "", "title='<*cdml*>X: {x|2}<*br*>Y: {y|2}<*br*>Z: {z|2}'"); // Output Javascript chart model to support contour chart tooltips WebChartViewer1.ChartModel = c.getJsChartModel(); } </script> <html> <head> <script type="text/javascript" src="cdjcv.js"></script> </head> <body> <chart:WebChartViewer id="WebChartViewer1" runat="server" /> </body> </html>

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\contourlegend.aspx
(Click here on how to convert this code to code-behind style.)
<%@ Page Language="VB" Debug="true" %> <%@ Import Namespace="ChartDirector" %> <%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %> <!DOCTYPE html> <script runat="server"> ' ' Page Load event handler ' Protected Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) ' The x and y coordinates of the grid Dim dataX() As Double = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} Dim dataY() As Double = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} ' Use random numbers for the z values on the XY grid Dim r As RanSeries = New RanSeries(999) Dim dataZ() As Double = r.get2DSeries(UBound(dataX) + 1, UBound(dataY) + 1, -0.9, 1.15) ' Create a XYChart object of size 640 x 460 pixels Dim c As XYChart = New XYChart(640, 460) ' Set default text color to dark grey (0x333333) c.setColor(Chart.TextColor, &H333333) ' Set the plotarea at (30, 25) and of size 400 x 400 pixels. Use semi-transparent grey ' (0xdd000000) horizontal and vertical grid lines c.setPlotArea(50, 25, 400, 400, -1, -1, Chart.Transparent, &Hdd000000, -1) ' Set the x and y axis stems to transparent and the label font to 12pt Arial c.xAxis().setColors(Chart.Transparent) c.yAxis().setColors(Chart.Transparent) c.xAxis().setLabelStyle("Arial", 12) c.yAxis().setLabelStyle("Arial", 12) ' Set the x-axis and y-axis scale c.xAxis().setLinearScale(0, 10, 1) c.yAxis().setLinearScale(0, 10, 1) ' Add a contour layer using the given data Dim layer As ContourLayer = c.addContourLayer(dataX, dataY, dataZ) ' Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer) ' Define the color scale Dim colorScale() As Double = {-0.8, &H0066ff, -0.5, &H66ccff, -0.3, &H66ffff, 0, &H88ff88, _ 0.4, &H00ff00, 0.7, &Hffff00, 0.9, &Hff6600, 1.0, &Hcc0000, 1.1} ' Apply the color scale, and specify the underflow and overflow colors for regions exceeding the ' color scale layer.colorAxis().setColorScale(colorScale, &H0000cc, &H000000) ' ' Instead of displaying the color axis, we use a legend box to display the colors. This is ' useful for colors that are unevenly spaced on the color axis. ' ' Add a legend box at (460, 25) with vertical layout, with 12pt Arial font, transparent ' background and border, icon size of 15 x 15 pixels, and line spacing of 8 pixels. Dim b As LegendBox = c.addLegend(460, 25, True, "Arial", 12) b.setBackground(Chart.Transparent, Chart.Transparent) b.setKeySize(15, 15) b.setKeySpacing(0, 8) ' Add the legend box entries b.addKey("> 1.1 (Critical)", &H000000) b.addKey("1.0 to 1.1 (Alert)", &Hcc0000) b.addKey("0.9 to 1.0", &Hff6600) b.addKey("0.7 to 0.9", &Hffff00) b.addKey("0.4 to 0.7", &H00ff00) b.addKey("0.0 to 0.4", &H88ff88) b.addKey("-0.3 to 0.0", &H66ffff) b.addKey("-0.5 to -0.3", &H66ccff) b.addKey("-0.8 to -0.5", &H0066ff) b.addKey("< -0.8", &H0000cc) ' Output the chart WebChartViewer1.Image = c.makeWebImage(Chart.SVG) ' Include tool tip for the chart WebChartViewer1.ImageMap = c.getHTMLImageMap("", "", _ "title='<*cdml*>X: {x|2}<*br*>Y: {y|2}<*br*>Z: {z|2}'") ' Output Javascript chart model to support contour chart tooltips WebChartViewer1.ChartModel = c.getJsChartModel() End Sub </script> <html> <head> <script type="text/javascript" src="cdjcv.js"></script> </head> <body> <chart:WebChartViewer id="WebChartViewer1" runat="server" /> </body> </html>

[ASP.NET MVC - Controller] NetMvcCharts\Controllers\ContourlegendController.cs
using System; using System.Web.Mvc; using ChartDirector; namespace NetMvcCharts.Controllers { public class ContourlegendController : Controller { // // Default Action // public ActionResult Index() { ViewBag.Title = "Contour Color Legend"; createChart(ViewBag.Viewer = new RazorChartViewer(HttpContext, "chart1")); return View("~/Views/Shared/ChartView.cshtml"); } // // Create chart // private void createChart(RazorChartViewer viewer) { // The x and y coordinates of the grid double[] dataX = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; double[] dataY = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; // Use random numbers for the z values on the XY grid RanSeries r = new RanSeries(999); double[] dataZ = r.get2DSeries(dataX.Length, dataY.Length, -0.9, 1.15); // Create a XYChart object of size 640 x 460 pixels XYChart c = new XYChart(640, 460); // Set default text color to dark grey (0x333333) c.setColor(Chart.TextColor, 0x333333); // Set the plotarea at (30, 25) and of size 400 x 400 pixels. Use semi-transparent grey // (0xdd000000) horizontal and vertical grid lines c.setPlotArea(50, 25, 400, 400, -1, -1, Chart.Transparent, unchecked((int)0xdd000000), -1); // Set the x and y axis stems to transparent and the label font to 12pt Arial c.xAxis().setColors(Chart.Transparent); c.yAxis().setColors(Chart.Transparent); c.xAxis().setLabelStyle("Arial", 12); c.yAxis().setLabelStyle("Arial", 12); // Set the x-axis and y-axis scale c.xAxis().setLinearScale(0, 10, 1); c.yAxis().setLinearScale(0, 10, 1); // Add a contour layer using the given data ContourLayer layer = c.addContourLayer(dataX, dataY, dataZ); // Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer); // Define the color scale double[] colorScale = {-0.8, 0x0066ff, -0.5, 0x66ccff, -0.3, 0x66ffff, 0, 0x88ff88, 0.4, 0x00ff00, 0.7, 0xffff00, 0.9, 0xff6600, 1.0, 0xcc0000, 1.1}; // Apply the color scale, and specify the underflow and overflow colors for regions exceeding // the color scale layer.colorAxis().setColorScale(colorScale, 0x0000cc, 0x000000); // // Instead of displaying the color axis, we use a legend box to display the colors. This is // useful for colors that are unevenly spaced on the color axis. // // Add a legend box at (460, 25) with vertical layout, with 12pt Arial font, transparent // background and border, icon size of 15 x 15 pixels, and line spacing of 8 pixels. LegendBox b = c.addLegend(460, 25, true, "Arial", 12); b.setBackground(Chart.Transparent, Chart.Transparent); b.setKeySize(15, 15); b.setKeySpacing(0, 8); // Add the legend box entries b.addKey("> 1.1 (Critical)", 0x000000); b.addKey("1.0 to 1.1 (Alert)", 0xcc0000); b.addKey("0.9 to 1.0", 0xff6600); b.addKey("0.7 to 0.9", 0xffff00); b.addKey("0.4 to 0.7", 0x00ff00); b.addKey("0.0 to 0.4", 0x88ff88); b.addKey("-0.3 to 0.0", 0x66ffff); b.addKey("-0.5 to -0.3", 0x66ccff); b.addKey("-0.8 to -0.5", 0x0066ff); b.addKey("< -0.8", 0x0000cc); // Output the chart viewer.Image = c.makeWebImage(Chart.SVG); // Include tool tip for the chart viewer.ImageMap = c.getHTMLImageMap("", "", "title='<*cdml*>X: {x|2}<*br*>Y: {y|2}<*br*>Z: {z|2}'"); // Output Javascript chart model to support contour chart tooltips viewer.ChartModel = c.getJsChartModel(); } } }

[ASP.NET MVC - View] NetMvcCharts\Views\Shared\ChartView.cshtml
@{ Layout = null; } <!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width" /> <title>@ViewBag.Title</title> <style> @ViewBag.Style </style> @Scripts.Render("~/Scripts/cdjcv.js") </head> <body style="margin:5px 0px 0px 5px"> <div style="font:bold 18pt verdana;"> @ViewBag.Title </div> <hr style="border:solid 1px #000080; background:#000080" /> <div> @{ if (ViewBag.Viewer is Array) { // Display multiple charts for (int i = 0; i < ViewBag.Viewer.Length; ++i) { @:@Html.Raw(ViewBag.Viewer[i].RenderHTML()) } } else { // Display one chart only @:@Html.Raw(ViewBag.Viewer.RenderHTML()) } } </div> </body> </html>