C# winform call js issue

zncliving · Posted on 2/18/2020 10:30:34 AM

A C# call to JS scheme found on the Internet
public string GetTimeByJs()
      {
         Type obj = Type.GetTypeFromProgID("ScriptControl");
         if (obj == null) return null;
         object ScriptControl = Activator.CreateInstance(obj);
         obj. InvokeMember("Language", BindingFlags.SetProperty, null, ScriptControl, new object[] { "JavaScript" });
         string js = "function time(a, b, msg){ var sum = a + b; return new Date().getTime() + ': ' + msg + ' = ' + sum }";
         obj. InvokeMember("AddCode", BindingFlags.InvokeMethod, null, ScriptControl, new object[] { js });
         return obj. InvokeMember("Eval", BindingFlags.InvokeMethod, null, ScriptControl, new object[] { "time(1, 2, '1 + 2')" }). ToString();
      }

The test is fine.
time(1, 2, '1 + 2'), where the parameters passed in are (number 1, number 2, string 1+2).
But there is a question, new object[] { "time(1, 2, '1 + 2')" }, if the argument of the JS method is of type byte[], how should it be written when calling?

Little scum · Posted on 2/18/2020 10:56:17 AM

JavaScript data types can be divided into two categories:

primitive type: e.g. Undefined, Null, Boolean, Number, String
Reference type value, that is, object type: Object type, such as Object, Array, Function, Date

The arguments of JS methods do not have byte[], everything is object

Utilize Jurassic to execute js functions under .net
https://www.itsvse.com/thread-4303-1-1.html
(Source: Architect_Programmer)

zncliving · Posted on 2/18/2020 2:10:18 PM

Xiao Zhazha Posted on 2020-2-18 10:56
JavaScript data types can be divided into two categories:

primitive type : such as Undefined, Null, Boolean, Numb ...

Ao is like this

I don't know much about JS.
If
Suppose the time function parameter of js is an array
function time(Array ){....................}

Follow the last sentence of this C# function
return obj. InvokeMember("Eval", BindingFlags.InvokeMethod, null, ScriptControl, new object[] { "time(????)" }). ToString();

I want to pass an Array
var mycars = new Array();
mycars[0] = "a";
mycars[1] = "b";
mycars[2] = "c";

If you only call JS on this C# code implementation, you don't care about other code methods. That's in this C# code??? How should the parameters be written?

Little scum · Posted on 2/18/2020 2:17:06 PM

zncliving Posted on 2020-2-18 14:10
Ao: That's right, I don't know much about JS.
If
Suppose the time function parameter of js is an array

Well, I can only give you ideas, not help you write code

You still need to research the code yourself

zncliving · Posted on 2/18/2020 2:35:32 PM

Xiao Zhazha Posted on 2020-2-18 14:17
Well, I can only give you ideas, not help you write code

You still need to research the code yourself

Okay, I'm looking for information

[New Issue] C# winform call js issue

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