C#

Eval JavaScript Returning Int

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Demonstrates getting the completion value of a JavaScript that returns an integer. C#

bool success = false;

// This example demonstrates getting the completion value of a script,
// where the last evaluated expression is an integer.

// The Javascript run in this example is shown below.

// Load the JavaScript from a file.
Chilkat.StringBuilder sbScript = new Chilkat.StringBuilder();
success = sbScript.LoadFile("js_eval_return_int.js","utf-8");
if (success == false) {
    Debug.WriteLine(sbScript.LastErrorText);
    return;
}

Chilkat.Js js = new Chilkat.Js();
Chilkat.JsonObject result = new Chilkat.JsonObject();

// Run the JavaScript
// Eval returns the completion value of the script. This is generally the value of the last evaluated expression.
// In this case, the last evaluated expression is an int.
success = js.Eval(sbScript,result);
if (success == false) {
    Debug.WriteLine(sbScript.LastErrorText);
    return;
}

result.EmitCompact = false;
Debug.WriteLine(result.Emit());

// Output:

// {
//   "type": "int",
//   "value": 42
// }