Calling C# From JavaScript

Defining Commands

Much like Tauri, IgniteView allows you to expose functions as "Commands", which can be called by JavaScript code.

To create a command:

• Write a public, static function that contains your C# logic
• Add this function to a public class, we recommend creating a dedicated class for all your commands
• Attach a [Command] attribute to your static method, with the parameter being the name of your function in JavaScript

Commands.cs

[Command("beep")]
public static void Beep(int times)
{
    for (int i = 0; i < times; i++)
    {
        Console.Beep();
    }
}

Calling Commands

In your JavaScript code, the command is now available to call using the window.igniteView.commandBridge object:

Main.js

igniteView.commandBridge.beep(5); // Beeps 5 times

Getting Return Values

You are able to return data from the commands. Most serializable types are supported, including primitive types and arrays.

Commands.cs

[Command("getUsername")]
public static string GetUsername()
{
    return Environment.UserName;
}

Calling from JavaScript will return a Promise, which you will need to await.

const username = await igniteView.commandBridge.getUsername();
console.log(username);

---- OR ----

igniteView.commandBridge.getUsername().then(console.log);

Async Commands

Returning a Task from a command is also supported:

Commands.cs

[Command("getUsernameAsync")]
public static async Task<string> GetUsernameAsync()
{
    await Task.Delay(1000);
    return Environment.UserName;
}

Command Context

Sometimes, you may need to access the WebWindow object from the command. To do this, simply add a WebWindow as the first parameter of the method:

Commands.cs

[Command("resize")]
public static void Resize(WebWindow target, int width, int height)
{
    target.Bounds = new WindowBounds(width, height);
}

In this example, the target variable will automatically be filled in as the calling window. To execute the method, simply call it as usual, but omit the target parameter in JavaScript:

igniteView.commandBridge.resize(640, 480);