Often it may not be convenient to load chart data from a file. For example, if the data is created from within the program using a mathematical calculation, it makes more sense to read it into the chart directly instead of saving it to a file and then reading it again. Not only can this method be quicker, it can also be quite easy to program.
The following example creates a regular grid dataset using a precalculated two-dimensional array and then transfers it to the chart:
' Calculate array
Dim Rnd As Random = New Random()
Dim m,n As Integer
Dim z(20,30) As Double
For m = 0 To 30
For n = 0 To 20
If m Mod 2 = 0 Then
Z(n, m) = m * 5 * Rnd.NextDouble() + Math.Sqrt(2 * m * m * n)
Else
Z(n, m) = m * -5 * Rnd.NextDouble() + Math.Sqrt(2 * m * n)
End If
Next n
Next m
' create dataset and put it to the chart
Dim gridset As Chart3DDataSetGrid
gridset=New Chart3DDataSetGrid( 0, 0, 1, 1, z)
C1Chart3D1.ChartGroups(0).ChartData.Set = gridset
•C#
// Calculate array
Random rnd = new Random();
double[,] z = new double[21, 31];
for( int m = 0; m<31; m++)
for( int n = 0; n<21; n++)
{
if(m%2==0)
z[n,m]= m * 5 * rnd.NextDouble() + Math.Sqrt(2 * m * m * n);
else
z[n,m]= m * -5 * rnd.NextDouble() + Math.Sqrt(2 * m * n);
}
// create dataset and put it to the chart
Chart3DDataSetGrid gridset=new Chart3DDataSetGrid(0,0,1,1,z);
C1Chart3D1.ChartGroups[0].ChartData.Set = gridset;