Convert String to Int

[Guest]

I have an integer value in a textbox, i want to use the value to perform a
mathematical calculation, however i can only access this value as a string
and i can't cast a string to an int. How do i do this?

 

[Ray Booysen]

I have an integer value in a textbox, i want to use the value to perform a
mathematical calculation, however i can only access this value as a string
and i can't cast a string to an int. How do i do this?

(Int32)textbox1.text; for c#

Or even just use the Convert methods.

Convert.ToInt32(textbox1.text)

 

[Guest]

(Int32)textbox1.text; for c#

Strangely this does not work, it was the first thing i tried and i get an
error saying CS0030: Cannot convert type 'string' to 'int'. I will try the
Convert object and see how that goes.

 

[Karl Seguin [MVP]]

I wouldn't expect casting it t work. It isn't and never was an int. It's a
string with that has an integer value. Covert.ToInt32 or Int32.Parse will
work however.

Here's a function you might find handy:

public static int ParseInt(object o, int defaultValue)
{
if (o == null || o == DBNull.Value)
{
return defaultValue;
}
try
{
return Int32.Parse(o.ToString(), CultureInfo.InvariantCulture);
}
catch (Exception ex)
{
if (!(ex is FormatException) && !(ex is InvalidCastException) && !(ex
is OverflowException))
{
throw;
}
return defaultValue;
}
}

Karl