Question

I’m getting a ‘FormatException: Input string was not in a correct format’ error that I don’t understand.

I’m using the following lines to write a string to a text file:

using (StreamWriter sw = new StreamWriter(myfilename, false, System.Text.Encoding.GetEncoding(enc))) {     sw.Write(mystring, Environment.NewLine); } 

(the encoding part is because I do have an option in my application to set it to utf-8 or iso-8859-1… but I think that’s irrelevant).

All of my strings write out just fine except this one string that is different from the others because it actually has a snippet of javascript code in it. I’m sure that one of the special characters there might be causing the problem but how do I know?

The one thing I tried was to insert the following line just before the sw.Write statement above:

System.Console.WriteLine(mystring); 

and it wrote out to the console just fine – no error.

Help?

Thanks! (and Happy New Year!)

-Adeena

Answer 1

The overload you are using takes the format as the first parameter, and objects to inject after that.

You can do either of the following:

sw.Write(mystring + Environment.NewLine); 

or

sw.Write('{0}{1}', mystring, Environment.NewLine);