[RESOLVED] Taking Result And Converting to Percentage

[cmmorris1]

I'm trying to take a result for a simple website conversion calculator and turn that into a percentage. So for example, if the result is 0.314500 I want to turn that into 31.4%.

Here is the code I have so far for this:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim d As Decimal
        d = (TextBox2.Text.ToString / TextBox1.Text.ToString)
        Me.TextBox3.Text = Decimal.Round(d, 4).ToString("f6")
    End Sub

[keystone_paul]

Why are you calling ToString on the text property of a textbox ? It is already a string.

You should be converting to a numeric type in order for your calculation to make sense.

I'd recommend turning Option Strict on and fixing the errors that highlights.

[t3kizzleee]

Why don't you multiply your decimal by 100 and then cut off however many places after the decimal point you want.

[cmmorris1]

I tried turning it on and got no difference...I will remove the .tostring reference but do you have example code to take the result and do the conversion?

[.paul.]

percentage = (result * 100).tostring("n2")

[keystone_paul]

do you have example code to take the result and do the conversion?

How about

        Dim d As Decimal
        d = (Decimal.Parse(TextBox2.Text) / Decimal.Parse(TextBox1.Text))
        MessageBox.Show(Decimal.Round(d, 4).ToString("f1"))

For simplicity I'm assuming that you've already validated that textbox2.text and textbox1.text both contain text that can be resolved to decimal values.

[cmmorris1]

Ok t3kizzleee I did that and it did give me the result but I'd like to have it cut off all but lets say 31.4% as an example result.

[.paul.]

keystone paul was talking about performing mathematical operations on strings, which you should never do. option strict on, wouldn't allow that.

[cmmorris1]

Thanks .paul. that did it :-)