validate integer value

[logi2000]

is there any function in C# that validate if a data in a variable is an integer or not ?

 

[jfrost10]

Do you mean if a string is numeric?

Cause if you have an integer datatype, then it'll be an integer.


You can use

IsNumeric(string)

and that will return a boolean value about whether its numeric or not.

hth

D

 

[klaz2002]

Is it a string you have the 'value' in? Do you want to check this value and see if it is valid int value too?

If this is the case why not use the convert method and catch the exception if you guess the wrong type.
If its a type of variable that your after, you can use the GetType() method.

Please give us some more info.
Klaz

 

[klaz2002]

Jfrost10 You beat me! Yes you can use that Method too.
Klaz

 

[JohnYingling]

Dim sInt as string = "A"
Try
dim nInt as Integer
nInt = Integer.Parse(sInt)
Catch ex as exception
....
End Try

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Generate Sort Class in VB

http://www.Vbcompare.com/Check.Htm(1979

Check To MS)

 

[cappmgr]

D,
IsNumeric would not compile for me, is it part of C#
here is a function taken from

http://www.dotnetspider.com/Technology/KBPages/328.aspx

private static bool ValidateNumber(string input )
{
foreach ( char c in input )
{
	if ( ! Char.IsNumber( c ) )
	{
		return false;
	}
}
	return true;
}

Marty

 

[chiph]

IsNumeric is part of the Visual Basic compatability namespace (Microsoft.VisualBasic).

You can use the int.Parse() method with try..catch block, or the other method you found will work too (be sure to allow for -/+ symbols as well).

Chip H.


____________________________________________________________________
If you want to get the best response to a question, please read FAQ222-2244 first

 

[logi2000]

i like this solution int.Parse(max);

 

[jfrost10]

C# doesn't have IsNumeric?

Yet another reason why developers should choose VB.NET


D