How to convert Jscript null into dotNet Null

[ViktorUvpv]

Hi. I have a script wrote on Jscript. I trying to call a method from C# application. I must to set one of the parameters equal "null", but i get a message: "Mismatch types". 

The reason is: "Jscript differs from dotNet Null"

How to convert Jscript null into dotNet Null ?

Thanks.

[YMinaev]

Hi Viktor,



Can you post here your function's declaration (just its name with parameters) and let us know which of them should be Null?

[ViktorUvpv]

Hello, thanks for reply!



CompareStrings (string str1, string str2, ICompareOptionsProvider options)



I have to pass null in the parameter "options"



the call in C# looks like



CompareStrings(srtVar1, strVar2, null).



In the TestComplete script I have wrote the function call like this

CompareStrings(dotNET.System.String.Copy(gSQLEditor.Text), dotNET.System.String.Copy(ScriptEtalon), null)



But as I have read in the JScript reference, null keyword represents a structure that cannot be converted implicitly.



Please help!!!

[YMinaev]

Hi Viktor,



You need to find a method (in your application or in some assembly) which returns Null and use this method's return value. This seems to be the only way to get the .NET Null value in scripts. For example, you can implement a method which will return Null in your application's main form class and, after that, use this method in scripts.