移植一個winform應用程序以在mac上開發

我試圖將在Visual Studio中創建的winforms應用程序移植到Mac上進行monodevelop。解決編譯錯誤後，當我運行該程序，該應用程序輸出這些異常：移植一個winform應用程序以在mac上開發

System.NullReferenceException: Object reference not set to an instance of an object 
at System.Windows.Forms.TextBoxBase.set_Lines (System.String[] value) [0x00000] in <filename unknown>:0 

    at (wrapper remoting-invoke-with-check) System.Windows.Forms.TextBoxBase:set_Lines (string[]) 

    at WindowsFormsApplication1.Main_Form.amp_portante_ValueChanged (System.Object Sender) [0x00025] in /Users/giuseppe/Desktop/CRUZER/Csound Converter/WindowsFormsApplication1/Main_Form.cs:381 

    at KnobControl.KnobControl.OnValueChanged (System.Object sender) [0x00000] in <filename unknown>:0 

    at KnobControl.KnobControl.set_Value (Int32 value) [0x00000] in <filename unknown>:0 
    at (wrapper remoting-invoke-with-check) KnobControl.KnobControl:set_Value (int) 
    at WindowsFormsApplication1.Main_Form.textb2_TextChanged (System.Object sender, System.EventArgs e) [0x00085] in /Users/giuseppe/Desktop/CRUZER/Csound Converter/WindowsFormsApplication1/Main_Form.cs:1023 
    at System.Windows.Forms.Control.OnTextChanged (System.EventArgs e) [0x00000] in <filename unknown>:0 
    at System.Windows.Forms.TextBoxBase.OnTextChanged (System.EventArgs e) [0x00000] in <filename unknown>:0 
    at System.Windows.Forms.TextBoxBase.set_Text (System.String value) [0x00000] in <filename unknown>:0 
    at System.Windows.Forms.TextBox.set_Text (System.String value) [0x00000] in <filename unknown>:0 
    at WindowsFormsApplication1.Main_Form.SimpleFM_Conf() [0x00058] in /Users/giuseppe/Desktop/CRUZER/Csound Converter/WindowsFormsApplication1/Main_Form.cs:45 
    at WindowsFormsApplication1.Main_Form.Main_Form_Load (System.Object sender, System.EventArgs e) [0x00012] in /Users/giuseppe/Desktop/CRUZER/Csound Converter/WindowsFormsApplication1/Main_Form.cs:359 
    at System.Windows.Forms.Form.OnLoad (System.EventArgs e) [0x00000] in <filename unknown>:0 
    at System.Windows.Forms.Form.OnLoadInternal (System.EventArgs e) [0x00000] in <filename unknown>:0

應用程序完全在Visual Studio中，我不知道我應該做的。

來源

2013-02-16 Giu

嘗試設置裏面'Main_Form.textb2_TextChanged'或'Main_Form.amp_portante_ValueChanged'斷點，看看你能找出什麼從那裏的空。它幾乎看起來像你的KnobControl是空的，但我不習慣monodevelop堆棧痕跡，所以我可能很錯誤:) – 2013-02-16 16:55:56

我放置了斷點和應用程序停止，但我不知道如何看到什麼是null ...我在調試時沒有經驗 – Giu 2013-02-16 17:11:51

嗯，在Visual Studio中，鼠標懸停在變量上會顯示值，不確定MonoDevelop。 – 2013-02-16 17:15:00

你可能有一個你不能實例化的自定義控件（KnobControl）。

也許你沒有這個控件，或者這個控件不能用mono編譯。

看一看線381 Main_Form.cs

問候，

來源

2015-08-10 07:59:37 lostcitizen

移植一個winform應用程序以在mac上開發

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