Convert textbox.text to float

Question

    private void tbnRaknaMoms_Click(object sender, EventArgs e)
    {
        MessageBox.Show(ToPercentage().ToString());
    }
    public float ToPercentage()
    {
        float varde = float.Parse(tbxInput.Text);
        float result = 100 * varde;
        return result;
    }

I want to make a method that counts the tax. When I run this I get an error :

An unhandled exception of type 'System.FormatException' occurred in mscorlib.dll.

Try `float.Parse(tbxInput.Text, Thread.CurrentThread.CurrentUICulture);` or `float.Parse(tbxInput.Text, CultureInfo.InvariantCulture);` — Philippe Paré, Sep 28 '15 at 18:47
Wow your right. I was trying to input 0.2 in textbox but i guess i have to use decimal for that right? — Alex, Sep 28 '15 at 18:47
You want to validate input before you start trying to parse it (or use TryParse). — Jack Marchetti, Sep 28 '15 at 18:49

score 0 · Accepted Answer · answered Sep 28 '15 at 18:54

0

The problem is that the input is parsed according to the CultureInfo of the local computer. If you want to have the same "default" decimal delimiter, use this:

 float value = float.Parse(tbxInput.Text, CultureInfo.InvariantCulture);

answered Sep 28 '15 at 18:54

Philippe Paré

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It says the CultureInfo does not exits in current context. – Alex Sep 28 '15 at 19:01
@AlexanderHalef add the missing using `System.Globalization` as the compile error says. – Matyas Sep 28 '15 at 19:11
@AlexanderHalef @Matyas is correct, I didn't specify the `using` statement for `CultureInfo` – Philippe Paré Sep 28 '15 at 19:29

Convert textbox.text to float

1 Answers1