Different color for a piechart segment ???

harifsheik · July 29th, 2008, 06:42 AM

hi :)
I had created the PieChart using set of values.
how can i use different color for each segement in the piechart.

Code:

for (int i = 0; i < size - 1; i++)
{
segment[i] = myPane.AddPieSlice(Convert.ToDouble(NetSalesAMT[i]), 
Color.FromArgb(153, 204, 204), Color.White, 50f, 0, BranchName[i] + "\n " + Convert.ToString((NetSalesAMT[i])));
}

i have to change the color dynamically can anyone help me!!!!!

Thanks in advance
N.Sheik Dawood

samjudson · July 29th, 2008, 07:10 AM

Well you presumably need an array of colours so you can just assign a new colour to each segment? I don't see where the problem lies?

Color[] colors = new Color[] { Color.Red, Color.Blue, Color.Green, Color.Pink, Color.Yellow, Color.Brown };

for (int i = 0; i < size - 1; i++)
{
segment[i] = myPane.AddPieSlice(Convert.ToDouble(NetSalesAMT[i]),colors[i], 204), Color.White, 50f, 0, BranchName[i] + "\n " + Convert.ToString((NetSalesAMT[i])));
}

/- Sam Judson : Wrox Technical Editor -/

harifsheik · July 30th, 2008, 01:20 AM

thank you sam,:)
the code which you gave me is working,

but, i dont know how many segment will appear in the piechart it will change according to the size variable. so i cant give the fixed amount of color in the color[] array.
there is any other way to give the color dyanmically

Thanks in advance
N.Sheik Dawood

samjudson · July 30th, 2008, 02:40 AM

Well you could use a random number generator to generate numbers, but I wouldn't recommend it.

A pie chart with more than 20 or 30 slices is going to be impossible to read anyway, so I would just make a really big array of colours.

/- Sam Judson : Wrox Technical Editor -/