Question

I am using a Converter to convert a List<string> into a List<UInt32>

It does well, but when one of the array elements is not convertable, ToUint32 throw FormatException.

I would like to inform the user about the failed element.

try
{
    List<UInt32> MyList = SomeStringList.ConvertAll(new Converter<string, UInt32>(element => Convert.ToUInt32(element)));
}

catch (FormatException ex)
{
      //Want to display some message here regarding element.
}

I am catching the FormatException but can’t find if it contains the string name.

Answer 1

You can catch exception inside the lambda:

List<UInt32> MyList = SomeStringList.ConvertAll(new Converter<string, UInt32>(element =>
{
    try
    {
        return Convert.ToUInt32(element);
    }
    catch (FormatException ex)
    {
       // here you have access to element
       return default(uint);
    }
}));