Question

我制作了一个UserControl并想添加MainForm参考

  public partial class ConsolePage : UserControl
{
    public synForm mainForm = new synForm();

    public ConsolePage(synForm parentForm)
    {
        mainForm = parentForm();
        InitializeComponent();
    }

所以，事情是，只要我用C＃代码创建UserControl（无论在哪里），它都能正常工作，但是当我尝试从工具箱中的Designer中添加他时，我就遇到了异常。

我知道，我应该这样称呼他们

MyControl whatever = new MyControl(this);

如果我想从工具箱中添加myControl，我知道我应该在Form.Designer中更正它！

不要讨厌我是编程和拼写方面的新手：D

编辑：<<<<<<<< / p>

忘记输入我遇到的错误：

System.ComponentModel.Design.Serialization.DesignerSerializationManager.CreateInstance(Type type, ICollection arguments, String name, Boolean addToContainer)

System.ComponentModel.Design.Serialization.DesignerSerializationManager.System.ComponentModel.Design.Serialization.IDesignerSerializationManager.CreateInstance(Type type, ICollection arguments, String name, Boolean addToContainer)

System.ComponentModel.Design.Serialization.CodeDomSerializerBase.DeserializeInstance(IDesignerSerializationManager manager, Type type, Object[] parameters, String name, Boolean addToContainer)

System.ComponentModel.Design.Serialization.ComponentCodeDomSerializer.DeserializeInstance(IDesignerSerializationManager manager, Type type, Object[] parameters, String name, Boolean addToContainer)

System.ComponentModel.Design.Serialization.CodeDomSerializerBase.DeserializeExpression(IDesignerSerializationManager manager, String name, CodeExpression expression)

System.ComponentModel.Design.Serialization.CodeDomSerializer.DeserializeStatementToInstance(IDesignerSerializationManager manager, CodeStatement statement)
 System.ComponentModel.Design.Serialization.CodeDomSerializer.Deserialize(IDesignerSerializationManager manager, Object codeObject)
bei System.Windows.Forms.Design.ControlCodeDomSerializer.Deserialize(IDesignerSerializationManager manager, Object codeObject)

System.ComponentModel.Design.Serialization.TypeCodeDomSerializer.DeserializeName(IDesignerSerializationManager manager, String name, CodeStatementCollection statements)

Answer 1

不知道错误消息（仅提供了堆栈跟踪）和parentForm（）的内容，说起来并不容易。但是似乎parentForm（）正在做一些设计器中不可能做的事情。

因此，您可以尝试通过检查DesignMode（https://docs.microsoft.com/en-us/dotnet/api/system.componentmodel.component.designmode?redirectedfrom=MSDN&view=netframework-4.7.2#System_ComponentModel_Component_DesignMode）在设计模式下不执行parentForm（）。

public ConsolePage()
    {
        if (!DesignMode)
        {
            mainForm = parentForm();
        }
        InitializeComponent();
    }

C＃主窗体引用异常

1 个答案: