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C#

An exception of type System.FormatException& occurred in mscorlib.dll but was not handled in user code

 ChangePasswordModel changemodel = new ChangePasswordModel()
changemodel.AdminId = Convert.ToInt32(User.Identity.Name);

Posted 7-Dec-15 18:45pm

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phil.o 8-Dec-15 0:58am

Convert.ToInt32(User.Identity.Name);

What exactly do you expect from this statement?

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Sergey Alexandrovich Kryukov · Answer 1 · 2015-12-07T19:23:00

First of all, don't use Convert, uses int.Parse (which throws exception) or, better, int.TryParse. Not all strings someone enters can be parsed as integer; I have no idea why did you decide that User.Identity.Name should. Anyway, with the methods I mentioned you can check it up and handle the cases when the string cannot be parsed.

—SA

OriginalGriff · Answer 2 · 2015-12-07T19:28:00

Unless User.Identity.Name always contains only the digits 0 to 9, and has a total value that will fit in an Int32, then Convert.ToInt32 will always fail.

Given that it's called Name the chances are that it isn't a number. I'd start by looking at what it should contain, and check if what you actually meant was something like:

C#

changemodel.AdminId = Convert.ToInt32(User.Identity.Id);

Or more likely:

C#

changemodel.AdminId = User.Identity.Id;

But if you do have to convert it then use TryParse:

C#

if (!int.TryParse(User.Identity.Id, out changemodel.AdminId))
   {
   // Report or log problem
   ...
   }
else
   {
   // Work with value
   ...

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