wiredlime2015 - 1 year ago 172
ASP.NET (C#) Question

# ASP.NET & C# abs and min function

I am using Visual Studio 2015 with ASP.NET & C#. I have this calculation I am trying to implement into C# coding, but it says abs and min math functions are not there.

This is the code:

``````private double angle(int h, int m)
{
h = Convert.ToInt32(ddlHours.SelectedItem.Value);
m = Convert.ToInt32(ddlMinutes.SelectedItem.Value);

double hAngle = 0.5D * (h * 60 + m);
double mAngle = 6 * m;
double angle = Math.abs(hAngle - mAngle);
angle = Math.min(angle, 360 - angle);
return angle;
}
``````

Ultimately, I want the answer to go to my label.

How do I get the abs and min function, or is there another way that still provides the accuracy of this calculation?

I would suggest a few things;

• C# is a case sensitive language. The right syntax of those methods are `Math.Abs` and `Math.Min`
• Depending on your structure of course but this method would be better as a static method since probably it will not need an instance to calculate this angel value.
• You don't assign your `ddlHours.SelectedItem.Value` and `ddlMinutes.SelectedItem.Value` to your parameters inside of your method. In such a case, there will be difference between `angle(5, 30)` and `angle(6, 40)` method calls since both do the calculation based on those dropdownlist values.
• Parse your dropdownlist values to integer and call your `angel` method with those parameters.

``````static double angle(int h, int m)
{
double hAngle = 0.5D * (h * 60 + m);
double mAngle = 6 * m;
double angle = Math.Abs(hAngle - mAngle);
return Math.Min(angle, 360 - angle);
}
``````

and call this method as;

``````int h = Convert.ToInt32(ddlHours.SelectedItem.Value);
int m = Convert.ToInt32(ddlMinutes.SelectedItem.Value);

double angel = YourType.angel(h, m);
``````
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