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c#floating-pointtype-conversion
jay_t55
jay_t55

Reputation: 11652

How do I turn 67 into float equivalent?

I'm using a library where I need to set a value on a variable and it only accepts float type, but the TrackBar Control only accepts Int32 for its Value property.

So let's say that the Min value of TrackBar is 0 and Max value is 100. And the Current value of TrackBar is 67; how do I convert that value to its equivalent in float? So it should become something like 0.067, if I'm correct.

Upvotes: 0

Views: 196

Answers (2)

Jon
Jon

Reputation: 3255

To convert int to float just cast:

(float)trackBar.Value;

or 

Convert.ToSingle(trackBar.Value);

Note that if you need to change range you need to perform at least division. I.e. in your case it looks like value is percentage, so divide by 100.0:

trackBar.Value / 100.0f;

Note that if you use 100 than result will be wrong as using integer division ( trackBar.Value / 100 will always be 0).

In general conversion for integer in 0-n range to (mixValue, maxValue) range:

 (trackBar.Value /( (float) maxValue - minValue)) + minValue;

Upvotes: 2

avanek
avanek

Reputation: 1659

Divide the integer value by 100 as a float to get the percentage as a float. This will cause the value to be normalized to fall between 0 and 1 as a decimal value:

float trackBarPercentage = trackBar.Value / 100f;

Dividing the integer value by a float value will cause the right-hand side to automatically be casted to the float type. See the MSDN article Casting and Type Conversions for more info.

Upvotes: 2

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