📄 trendline.aspx
字号:
<%@ Page Language="C#" debug="true" Description="dotnetCHARTING Component" %>
<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>
<%@ Import Namespace="System.Drawing" %>
<HTML>
<HEAD>
<TITLE>Trend Line</TITLE>
<script runat="server">
void Page_Load(Object sender,EventArgs e)
{
Chart.Type = ChartType.Combo;//Horizontal;
Chart.Width = 750;
Chart.Height = 300;
Chart.TempDirectory = "temp";
Chart.Debug = true;
// This sample will demonstrate how to derive trend lines from your data.
// First we get our data, if you would like to get the data from a database you need to use
// the data engine. See sample: features/dataEngine.aspx. Or the dataEngine tutorial in the help file.
SeriesCollection mySC = getRandomData();
// Setup
Chart.DefaultSeries.Line.Width = 2;
Chart.DefaultSeries.DefaultElement.Transparency = 45;
Chart.LegendBox.Position = LegendBoxPosition.BottomMiddle;
Chart.DefaultSeries.DefaultElement.Marker.Type = ElementMarkerType.None;
// Get a trend line from series 1. Because only the SeriesCollection Calculate method returns a series a
// SeriesCollection is instantiated and the method is used.
Series trend1 = (new SeriesCollection(mySC[0])).Calculate("Series 1 Trend",Calculation.TrendLineLinear);
// Set the type to line
trend1.Type = SeriesType.Line;
//We'll give this line a green color so it looks like the related green columns of series 2.
trend1.DefaultElement.Color = Color.FromArgb(25,225,25);
// Trend line from Series 1 & 2
// This time we want to predict what will happen 10 steps from now so we pass an extra parameter to the
// calculate method.
Series trend2 = mySC.Calculate("Series 1 & 2 Trend + (10 elements)",Calculation.TrendLineLinear,10);
// Set the series type to line
trend2.Type = SeriesType.Line;
// Give this trend line a blue color.
trend2.DefaultElement.Color = Color.FromArgb(0,156,255);
// Add the trend lines to the collection.
mySC.Add(trend1);
mySC.Add(trend2);
// Add the collection.
Chart.SeriesCollection.Add(mySC);
}
SeriesCollection getRandomData()
{
SeriesCollection SC = new SeriesCollection();
Random myR = new Random();
for(int a = 1; a < 3; a++)
{
Series s = new Series();
s.Name = "Series " + a;
for(int b = 1; b < 36; b++)
{
Element e = new Element();
e.Name = "Element " + b;
if(a == 0)
e.YValue = myR.Next(30);
else
e.YValue = myR.Next(50);
s.Elements.Add(e);
}
SC.Add(s);
}
// Set Different Colors for our Series
SC[0].DefaultElement.Color = Color.FromArgb(49,255,49);
SC[1].DefaultElement.Color = Color.FromArgb(255,255,0);
return SC;
}
</script>
</HEAD>
<BODY>
<DIV align="center">
<dotnet:Chart id="Chart" runat="server" Width="568px" Height="344px">
</dotnet:Chart>
</DIV>
</BODY>
</HTML>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -