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Plutiko
8 Posts |
 Posted - 11 Sep 2003 : 15:23:20
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Hello
I want to plot a XY line chart. On the x-as I would like have some date. The I don't know how I can translate an array of the type Date to an array of the type ChartCalendar. Does somebody has an example how you cast it?
I hope somebody can help,
thank you
Plutiko |
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quinncurtis
1164 Posts |
Posted - 11 Sep 2003 : 15:45:48
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Do you mean the DateTime class, rather than a Date class. I could find no reference to a Date class in .Net.
The QCChart2D ChartCalendar class has a constructor that accepts a DateTime class.
If you want language specific example you will need to specify whether you are using C# or VB.
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Plutiko
8 Posts |
Posted - 11 Sep 2003 : 16:07:15
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I'm using VB.net
I tried it also with an array of the type DateTime, but I couldn't let ik work. If you have an example I would appreciate it. |
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Plutiko
8 Posts |
Posted - 11 Sep 2003 : 16:24:32
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Maybe easier when I adjust the code that doesn't work.
Public Sub PasteData(ByVal skew As ArrayList, ByVal ATM As ArrayList)
skewArray = skew
ATMArray = ATM
End Sub
Private Sub InitializeChart()
Dim chartVu As ChartView = Me
Dim skew As New ArrayList()
Dim ATM(ATMArray.Count) As Double
Dim arrayExp(ATMArray.Count) As ChartCalendar
Dim DT As DateTime
Dim x As skewprm
Dim i As Integer
For Each x In skew
DT = CType((x.getExpDate), DateTime)
arrayExp(i) = DT
i = i + 1
Next
Dim Dataset1 As New TimeSimpleDataset("First", arrayExp, ATM)
The line arrayExp(i) = DT doesn't work
any clue? |
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quinncurtis
1164 Posts |
Posted - 11 Sep 2003 : 16:41:56
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Here is a modified version of the date initialization section in the InitializeChart method of the EditChartExample example program. It creates a DateTime array with dates separated by 3 months, and copies that to a ChartCalendar array.
Dim x1(nnumpnts - 1) As ChartCalendar
Dim y1(nnumpnts - 1) As Double
Dim y2(nnumpnts - 1) As Double
Dim startdatetime As DateTime = New DateTime(2003, 1, 1)
Dim datetimearray(nnumpnts - 1) As DateTime
For i = 0 To nnumpnts - 1
datetimearray(i) = startdatetime.AddMonths(i * 3)
Next
y1(0) = 100
y2(0) = 30
For i = 0 To nnumpnts - 1
x1(i) = New ChartCalendar(datetimearray(i))
If (i > 0) Then
y1(i) += y1((i-1))+(5+i)*(0.75- ChartSupport.GetRandomDouble())
y2(i) += y2((i-1))+(15+i)*(0.95- ChartSupport.GetRandomDouble())
End If
Next
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Plutiko
8 Posts |
Posted - 11 Sep 2003 : 16:57:51
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| Thank you, that works perfectly |
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quinncurtis
1164 Posts |
Posted - 11 Sep 2003 : 16:58:31
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You can't assign disimilar types
arrayExp(i) = DT
where arrayExp(i) is of type ChartCalendar and DT is of type DateTime.
I think this code should work, assuming that DT is a valid date for all i. I think you have a dangerous, unitialzied i variable in your code.
i = 0
For Each x In skew
DT = CType((x.getExpDate), DateTime)
arrayExp(i) = new ChartCalendar(DT)
i = i + 1
Next
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Topic |
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cast from Date to ChartCalendar
