precision of digits durring conversion

Fred 34

float Width = 47;
textBox1.Text = System.Convert.ToString(Width);

Consider above statements. after executing this command the content of textBox1.Text will be 46.99 instead of 47; I've solved this problem by some functions, but I want to see is there any tuning in C# 2010 that I missed it? thanks

Pete OHanlon

I'm not sure why you are seeing 46.99. When I run this code, I see 47 written out both times:

float myVal = 47;
string text = Convert.ToString(myVal);
Console.WriteLine(myVal.ToString());
Console.WriteLine(text);

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Dave Kreskowiak

There is no tuning for this. This is a side effect of trying to store an infinite number of floating point numbers in a finite amount of bits. Read this[^] for more information.

A guide to posting questions on CodeProject[^]
Dave Kreskowiak

PIEBALDconsult

Avoid float; try Decimal or double 1) Avoid Convert; in this case use ToString, perhaps with a format parameter 2) Avoid TextBox for numeric values; use a NumericUpDown