Question

I have given a default value “2.5” for a textbox called “diff_Box” and then in order to check something in another purpose, I took this value and paste it into another textbox called “textbox5”. But in textbox5 it is displayed as 25. I know it is a very common issue but I can not solve it somehow. I have tried sofar;

double diff;

diff = Double.parse(diff_Box.Text);
diff = Convert.ToDouble(diff_Box.Text);



textBox5.Text = Convert.ToString(diff);
textBox5.Text = diff.ToString("F2");
textBox5.Text = ToString.parse(diff);

but I am encountering all the time the same problem

thanks in advance

Answer 1

The problem is that you are not using the format used by your system UI culture. You actually are using the InvariantCulture on your GUI.

You use a . in the textbox. I assume your current UI culture uses ,. Therefore it sees no digits after the . and results in 25.0 instead of 2.5.

This line will convert back using the InvariantCulture instead of the system UI culture:

double diff = Double.Parse(diff_Box.text, CultureInfo.InvariantCulture);

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The better approach however is to use a private Double _diff and just convert it to the required culture for display on the form. Second, you should expect the users to use the UI culture for data-entry.