创建用户控件失败

Question

我在尝试在 Visual Studio 2022 中使用用户控件时收到此消息

X

Failed to create component 'CtrPersonCard The error

message follows

'System.MissingMethodException: Constructor on type 'DVLDNew.CtrPersonCard' not found.

at System.Runtime Type.CreateInstancelmpl(BindingFlags bindingAttr. Binder binder Object[] as, Cultureinfo culture Object[] activationAttributes, StackCrawlMark& stackMark)

at System.Activator CreateInstance(Type type, BindingFlags bindingAttr Binder binder, Object[] args, CultureInfo culture,

Object[] activationAttributes)

at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr. Binder binder Object[] args, CultureInfo culture)

at

System.ComponentModel.Design.DesignSurface.CreateInstanc e(Type type)

at

Microsoft VisualStudio. Design. VSDesignSurface.CreateInstance( Type type)

at

System.ComponentModel.Design.DesignerHost System.Compo nentModel.Design. IDesignerHost.CreateComponent(Type component Type, String name)

at

System.Drawing.Design.Toolboxitem.CreateComponentsCore(1 DesignerHost host)

at

System.Drawing.Design. Toolboxltem.CreateComponentsCore(1 DesignerHost host, IDictionar

尝试使用c#进行用户控制 但我在尝试使用它时收到了这条消息 我可以在工具箱中看到控件，但高于消息 请帮忙

Answer 1

检查您的用户控件类是否具有构造函数。 像这样：

public CtrPersonCard()
{
    InitializeComponent();
}

如果构造函数存在，那么您可能正在调用另一个用户控件，或者您的代码中的命名空间是错误的...