更新文本從另一個

Question

我有，我需要在一個線程的形式運行中更新的文本，但不能工作究竟如何，這將是acheivable的問題，這是我現有的代碼：

public partial class Class1: Form 
{ 
    LoadText = loadText; 
    ResourceName = resourceName; 

    static private void ShowForm() 
    { 
     LoadForm = new Class1(LoadText, ResourceName); 
     Application.Run(LoadForm); 
    } 

    static public void ShowLoadScreen(string sText, string sResource) 
    { 
     LoadText = sText; 
     ResourceName = sResource; 

     Thread thread = new Thread(new ThreadStart(Class1.ShowForm)); 
     thread.IsBackground = true; 
     thread.SetApartmentState(ApartmentState.STA); 
     thread.Start(); 
    } 
} 

現在我需要改變在新開工的形式下一個文本框中的文本，這需要從理論「的Class2」執行：

class Class2 
{ 
    public void UpdateThreadFormTextbox 
    { 
     Class1.ShowLoadScreen("text", "text"); 
     //Change textbox in the thread instance of Class1 form 
    } 
} 

我已經研究過使用「調用」，但我不能使用從Class2中，確實有一個解決方案，使我能夠更新Class1線程實例fr中的文本om Class2？

Answer 1

只需使用Invoke從1類：

public partial class Class1: Form 
{ 
    private static Class1 LoadForm; 

    static private void ShowForm() 
    { 
     LoadForm = new Class1(LoadText, ResourceName); 
     Application.Run(LoadForm); 
    } 

    static public void ShowLoadScreen(string sText, string sResource) 
    { 
     LoadText = sText; 
     ResourceName = sResource; 

     Thread thread = new Thread(new ThreadStart(Class1.ShowForm)); 
     thread.IsBackground = true; 
     thread.SetApartmentState(ApartmentState.STA); 
     thread.Start(); 
    } 

    public static void SetText(string text) 
    { 
     Class1.LoadForm.textBox1.Invoke(new Action(() => Class1.LoadForm.textBox1.Text = text)); 
    } 
} 

然後使用從Class2中那個方法：

class Class2 
{ 
    public void UpdateThreadFormTextbox 
    { 
     Class1.ShowLoadScreen("text", "text"); 
     Class1.SetText("TEXT"); 
    } 
} 

Answer 2

您也可以通過將文本框的實例來你UpdateThreadFormTextBox方法實現這一目標並致電Invoke從您的Class2

public partial class Form1 : Form 
{ 
    public Form1() 
    { 
     InitializeComponent(); 
    } 

    private void Form1_Load(object sender, EventArgs e) 
    { 
     // Create instance of Class2 
     Class2 secondClass = new Class2(); 
     // Create a new thread, call 'UpdateThreadFormTextbox' 
     // and pass in the instance to our textBox1, start thread 
     new Thread(() => secondClass.UpdateThreadFormTextbox(textBox1)).Start(); 
    } 
} 

public class Class2 
{ 
    public void UpdateThreadFormTextbox(TextBox textBox) 
    { 
     textBox.Invoke(new Action(() => textBox.Text = "Set from another Thread")); 
    } 
}