How can I display error in messagebox if the textbox is a decimal number

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i am new in c#

how can i display error in messagebox if the textbox1 is a decimal number

thx all of you guy :)

What I have tried:

int A;
A = Convert.ToInt32(tbxTextBox1.Text);
if( A is a decimal number )
{messagebox.show("error");}

Posted 20-Oct-17 8:09am

Member 13476389

Updated 20-Oct-17 8:20am

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Karthik_Mahalingam 20-Oct-17 22:59pm

Show some example

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JustWatchLittle · Answer 1 · 2017-10-20T08:20:00

I assume when you mention decimal you mean a real number...

a.) Check whether Text conains a decimal seperator character
b.) In case there is a decimal separator: check whether at least one digit after (right of) decimal separator is not '0'
c.) In case there is a Digit != '0' after decimal separator it Looks like a decimal number, right? In case not it is an Natural number - Wikipedia[^]

Definition of Decimal[^]