C＃winforms使用Javascript的網頁瀏覽器控件

我在瀏覽器控件中加載了一個HTML頁面。 HTML有一個javascript函數windows.print，它試圖從我的瀏覽器打印。請如何傳遞windows.print（）函數以通過Winforms C＃打印。或者我怎樣才能傳遞我想打印到C＃中的JavaScript對象來打印。C＃winforms使用Javascript的網頁瀏覽器控件

請問我是C＃初學者，希望能有詳細的解釋。非常感謝！

來源

2017-10-10 Focus Ifeanyi

你也許可以做這樣的事情

namespace WindowsFormsApplication 
{ 
    // This first namespace is required for the ComVisible attribute used on the ScriptManager class. 
    using System.Runtime.InteropServices; 
    using System.Windows.Forms; 

    // This is your form. 
    public partial class Form1 : Form 
    { 
     // This nested class must be ComVisible for the JavaScript to be able to call it. 
     [ComVisible(true)] 
     public class ScriptManager 
     { 
      // Variable to store the form of type Form1. 
      private Form1 mForm; 

      // Constructor. 
      public ScriptManager(Form1 form) 
      { 
       // Save the form so it can be referenced later. 
       mForm = form; 
      } 

      // This method can be called from JavaScript. 
      public void MethodToCallFromScript() 
      { 
       // Call a method on the form. 
       mForm.DoSomething(); 
      } 

      // This method can also be called from JavaScript. 
      public void AnotherMethod(string message) 
      { 
       MessageBox.Show(message); 
      } 
     } 

     // This method will be called by the other method (MethodToCallFromScript) that gets called by JavaScript. 
     public void DoSomething() 
     { 
      // Indicate success. 
      MessageBox.Show("It worked!"); 
     } 

     // Constructor. 
     public Form1() 
     { 
      // Boilerplate code. 
      InitializeComponent(); 

      // Set the WebBrowser to use an instance of the ScriptManager to handle method calls to C#. 
      webBrowser1.ObjectForScripting = new ScriptManager(this); 

      // Create the webpage. 
      webBrowser1.DocumentText = @"<html> 
       <head> 
        <title>Test</title> 
       </head> 
       <body> 
       <input type=""button"" value=""Go!"" onclick=""window.external.MethodToCallFromScript();"" /> 
        <br /> 
        <input type=""button"" value=""Go Again!"" onclick=""window.external.AnotherMethod('Hello');"" /> 
       </body> 
       </html>"; 
     } 
    } 
}

來源

2017-10-10 10:34:36 Charles

太感謝了，那工作。現在我試圖向MethodCallFromScript方法添加一個參數，但它會引發錯誤。它只需要一個論據。 –

你總是可以定義一個方法來獲取ScriptManager類的多個參數，定義一個適合你的js函數調用的方法簽名並調用它。 – Charles

請你舉個例子，說明如何用上面的代碼實現這個功能？ –

C＃winforms使用Javascript的網頁瀏覽器控件

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