將userdomain複製到剪貼板錯誤

我創建了一個按鈕，當我按下它時，應該將當前的userdomain複製到剪貼板中。

private void button2_Click(object sender, EventArgs e) 
    { 
     Clipboard.SetText(System.Net.NetworkInformation.IPGlobalProperties. 
     GetIPGlobalProperties().DomainName); 
    }

但是VS總是給我一個錯誤，當我調試程序並按下按鈕。

System.ArgumentNullException ist aufgetreten. 
HResult=0x80004003 
Nachricht = Der Wert darf nicht NULL sein. 
Parametername: text 
Quelle = System.Windows.Forms 
Stapelüberwachung: 
at System.Windows.Forms.Clipboard.SetText(String text, TextDataFormat 
format) 
at WindowsFormsApp1.Window.button2_Click(Object sender, EventArgs e) in 
C:\Users\user\Documents\Visual Studio 
2017\Projects\WindowsFormsApp1\WindowsFormsApp1\Form1.cs:line 120 
at System.Windows.Forms.Control.OnClick(EventArgs e) 
at System.Windows.Forms.Button.OnClick(EventArgs e) 
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) 
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, 
Int32 clicks) 
at System.Windows.Forms.Control.WndProc(Message& m) 
at System.Windows.Forms.ButtonBase.WndProc(Message& m) 
at System.Windows.Forms.Button.WndProc(Message& m) 
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 
msg, IntPtr wparam, IntPtr lparam) 
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) 
at System.Windows.Forms.Application.ComponentManager.# 
System.Windows.Forms.UnsafeNat 
iveMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 
reason, Int32 pvLoopData) 
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 
reason, ApplicationContext context) 
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 
reason, ApplicationContext context) 
at WindowsFormsApp1.Program.Main() in C:\Users\user\Documents\Visual 
Studio 2017\Projects\WindowsFormsApp1\WindowsFormsApp1\Program.cs:line 18

預先感謝您

來源

2017-09-02 Madison

我認爲，由於某種原因，你的情況這行代碼System.Net.NetworkInformation.IPGlobalProperties.GetIPGlobalProperties().DomainName回報null或空字符串。根據MSDN Clipboard.SetText如果參數爲null或爲空則拋出異常。

你試過Environment.UserDomainName？

來源

2017-09-02 09:20:42 Michael

「你有沒有試過Environment.UserDomainName？」謝謝你<3 – Madison

將userdomain複製到剪貼板錯誤

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