New Post: How to pass short int from script to C# methods

Hi James2015Li,

The native value of a JavaScript number is double-precision floating-point. When you pass such a value to a .NET method, ClearScript converts it to one of the following managed types, choosing the first one that results in no numeric data loss:

• System.Int32
• System.Int64
• System.Single
• System.Double
  

In your sample above the argument 123 is converted to System.Int32, which is not implicitly convertible to System.Int16, so the call fails. However, ClearScript provides a helper function you can use in this scenario:
The HostFunctions class includes methods for converting script numbers to most managed numeric types. Unfortunately at the moment there's no way to change the default conversion algorithm.

Good luck!