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Trend .NET 2.0 does not
support directly to read data from a
file because we don't know your file format.
You can read data by your self and use the
cstAddXY or cstAddXYArray method to add
the data to the control. Trend.NET 3.0 already provides a module, please see the example.
C#
//Read the
last record for x axis and set the value
to XMax
......
//Read the first record for x axis and
set the value to XMin
......
Trend2.XMax = [last record];
Trend2.XMin = [first record];
Trend2.cstSetXDisplay(Trend2.XMin, Trend2.XMax);
double[,] XY = new double[2,RecordNum-1];
//two dimensions array, 0 dimension
is for x value, 1 dimension is for y
value
for (i = 0; i <= RecordNum-1; i++)
{
//XValue = ......
XY[0, i] = XValue;
//YValue = ......
XY[1, i] = YValue;
}
Trend2.cstAddXYArray(0, ref XY); //0
is the index of Vars
//that is say, for 1st line(Var 0),
the control will link RecordNum-1 XY
data points
//if there is more vars,continue to
add data
......
Trend2.cstRedrawDynamic();
VB.NET
'Read the
last record for x axis and set the value
to XMax
......
'Read the first record for x axis and
set the value to XMin
......
Trend2.XMax = [last record]
Trend2.XMin = [first record]
Trend2.cstSetXDisplay(Trend2.XMin, Trend2.XMax)
Dim XY(1, RecordNum-1) As Double 'two
dimensions array, 0 dimension is for
x value, 1 dimension is for y value
For i = 0 To 99
'XValue = ......
XY(0, i) = XValue
'YValue = ......
XY(1, i) = YValue
Next
Trend2.cstAddXYArray(0, XY) '0 is the
index of Vars
'that is say, for 1st line(Var 0), the
control will link RecordNum-1 XY data
points
'if there is more vars,continue to add
data
......
Trend2.cstRedrawDynamic()
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The Instrumentation Studio for .NET 3.0 need framework 2 or later.
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Right click the toolbox, select the "Choose Items" and browse the .NET FrameWork Components, then find the components of CSTSOFT.
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Compact framework does not support GDI+ now. We are waiting for next generation compact framework to support GDI+. As you know, it is impossible to implement great graphics without GDI+.
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There is not any incompatibility with Vista. Please try to install the software as administrator on Vista.
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cstAllocateBuffer is very important and used to allocate memory. This method should usually be called in the onload of a form to initialize the buffer for the control.
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In Instrumentation Studio for.NET, normally a control usually contains several sub-objects, such as CaptionItems, etc. When you delete the control from your form, those sub-objects will not be deleted automatically. At this time you should call propertypages of the control to remove those sub-objects first, then delete the control.
Similarly when you copy and paste a control, a new control is created, but no new sub-objects are created. The new control shares the sub-objects with the old one. For example, those two controls contains the same one CaptionItem. In some cirsumstance, this is useful to save the system resource. If you want to add some new sub-objects, it is wise to modify the form designer's code.
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1.Read the DateTime(for X axis) and Y value from your databse.
2.Add the dataset to Trend and identify the point is a broken point or not.
3.If it is, use cstAddBrokenPoint method to add it to Trend.NET.
4.Goto 1 for more data.
The key of your question is how to specify a broken point. In your figure, the third point does be a broken point.
You may write some code to identify which is a broken point, for example:
If [DateTime of point4] -[DateTime of pointe3] >1 hour then pointe3 is a broken point.
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