Input string was not in a correct format.

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C#

double toal, a = Convert.ToDouble(TextBox6.Text), b = Convert.ToDouble(TextBox7.Text), c = Convert.ToDouble(TextBox8.Text);
       toal = (a + b + c );
        Label2.Text = toal.ToString();

whenever am executing this program am getting Input string was not in a correct format. how can i solve this help me from this

Posted 29-Dec-11 23:39pm

sreedharmasula

Updated 29-Dec-11 23:40pm

Wendelius

v2

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anushripatil 30-Dec-11 5:42am

please explain more, that where exactly are u getting that error & what are b & c ??? .

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Wendelius · Answer 1 · 2011-12-29T23:42:00

Solution 1

Most likely yuo have illegal characters in your textbox.

Instead of directly converting the text to a number, use Double.TryParse[^]. It helps you to see the problems without generating an exception.

Posted 29-Dec-11 23:42pm

Wendelius

Comments

Rajesh Anuhya 30-Dec-11 5:43am

+5.., Proposed as Answer.

Wendelius 30-Dec-11 6:07am

Thank you Rajesh.

OriginalGriff · Answer 2 · 2011-12-29T23:44:00

Solution 2

Use double.TryParse instead - the problem is that your user's inputs are not valid string representations of numeric values, so you get an error. TryParse gives you a good/bad signal instead of throwing an exception, allowing you to report the problem to your user so he can fix it.

Posted 29-Dec-11 23:44pm

OriginalGriff