从另一个类，C＃.NET中调用Form类的函数 [英] Calling a function in the Form Class from another Class, C# .NET

问题描述

有人可以请让我知道一些code我怎么能调用位于Form类从另一个类的函数？

Can someone please let me know by some code how I can call a function located in the Form class from another class?

有些code将有很大的帮助！

Some code will be of great help!

感谢

编辑：这是我目前的code

This is my current code

 public partial class frmMain : Form
 {
    //*******Class Instances*******
    ImageProcessing IP = new ImageProcessing();


    //********************
    public void StatusUpdate(string text)
    {
        tlsStatusLabel.Text = text;
    }//


    public frmMain()
    {
        InitializeComponent();            
    }//
}


class ImageProcessing
{

    private void UpdateStatusLabel(frmMain form, string text)
    {
        form.StatusUpdate(text);
    }//

   private UpdateLabel()
   {
        UpdateStatusLabel(frmMain, "Converting to GreyScale");
   }
}

这个问题我有是frmMain。

the problem i am having is with frmMain.

推荐答案

一个快速和肮脏的方法是在你的Program.cs文件创建MainForm中的参考上面列出。

A quick and dirty way is to create a reference of the MainForm in your Program.cs file as listed above.

另外，您可以创建一个静态类来处理回电话给你的主要形式有：

Alternatively you can create a static class to handle calls back to your main form:

    public delegate void AddStatusMessageDelegate (string strMessage);

    public static class UpdateStatusBarMessage
        {

        public static Form mainwin;

        public static event AddStatusMessageDelegate OnNewStatusMessage;

        public static void ShowStatusMessage (string strMessage)
            {
            ThreadSafeStatusMessage (strMessage);
            }

        private static void ThreadSafeStatusMessage (string strMessage)
            {
            if (mainwin != null && mainwin.InvokeRequired)  // we are in a different thread to the main window
                mainwin.Invoke (new AddStatusMessageDelegate (ThreadSafeStatusMessage), new object [] { strMessage });  // call self from main thread
            else
                OnNewStatusMessage (strMessage);
            }

        }

把上面到您的MainForm.cs的命名空间，但独立于MainForm类里面的文件。
接下来把这个事件中调用到MainForm.cs主类。

Put the above into your MainForm.cs file inside the namespace but separate from your MainForm Class.
Next put this event call into your MainForm.cs main class.

     void UpdateStatusBarMessage_OnNewStatusMessage (string strMessage)
     {
          m_txtMessage.Caption = strMessage;
     }

然后，当你初始化MainForm.cs添加此事件处理到表单中。

Then when you initialise the MainForm.cs add this event handle to your form.

     UpdateStatusBarMessage.OnNewStatusMessage += UpdateStatusBarMessage_OnNewStatusMessage;

在与窗体（MDI），你想调用相关的任何用户控件或形式，只是我们以下...

In any UserControl or form associated with the form (MDI) that you want to call, just us the following...

     UpdateStatusBarMessage.ShowStatusMessage ("Hello World!");

由于它是静态的，可以称之为从程序中的任何地方。

Because it is static it can be called from anywhere in your program.

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