如何在inheritance的ControlDesigner类中获取ITypeDescriptorContext和IServiceProvider
我已将ControlDesigner类inheritance到MyControlDesigner 。
在这个类中，我需要获取ITypeDescriptorContext和IServiceProvider接口背后的对象，但我不知道如何:(
我需要这两个接口在方法中传递它们，但我无法在任何其他对象中找到它们。
有人能帮帮我吗。
谢谢
最好的问候Bojan
System.Design程序EditorServiceContext有一个内部类EditorServiceContext ，它实现了ITypeDescriptorContext ， IServiceProvider和IWindowsFormsEditorService 。
您可以找到它并创建类的实例或使用其静态方法来满足您的要求。 例如，要显示属性的编辑器，可以这样使用它：
var editorServiceContext = typeof(ControlDesigner).Assembly.GetTypes() .Where(x => x.Name == "EditorServiceContext").FirstOrDefault(); var editValue = editorServiceContext.GetMethod("EditValue", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public); editValue.Invoke(null, new object[] { this, this.Component, "The Property Name" });
如果由于任何原因您需要类的源来对其应用一些更改，那么这是该类的代码：
using System; using System.Collections; using System.ComponentModel; using System.ComponentModel.Design; using System.Drawing.Design; using System.Windows.Forms; using System.Windows.Forms.Design; internal class EditorServiceContext : IWindowsFormsEditorService, ITypeDescriptorContext, IServiceProvider { // Fields private IComponentChangeService _componentChangeSvc; private ComponentDesigner _designer; private PropertyDescriptor _targetProperty; // Methods internal EditorServiceContext(ComponentDesigner designer) { this._designer = designer; } internal EditorServiceContext(ComponentDesigner designer, PropertyDescriptor prop) { this._designer = designer; this._targetProperty = prop; if (prop == null) { prop = TypeDescriptor.GetDefaultProperty(designer.Component); if ((prop != null) && typeof(ICollection).IsAssignableFrom(prop.PropertyType)) { this._targetProperty = prop; } } } internal EditorServiceContext(ComponentDesigner designer, PropertyDescriptor prop, string newVerbText) : this(designer, prop) { this._designer.Verbs.Add(new DesignerVerb(newVerbText, new EventHandler(this.OnEditItems))); } public static object EditValue(ComponentDesigner designer, object objectToChange, string propName) { PropertyDescriptor prop = TypeDescriptor.GetProperties(objectToChange)[propName]; EditorServiceContext context = new EditorServiceContext(designer, prop); object obj2 = prop.GetValue(objectToChange); object obj3 = (prop.GetEditor(typeof(UITypeEditor)) as UITypeEditor).EditValue(context, context, obj2); if (obj3 != obj2) { try { prop.SetValue(objectToChange, obj3); } catch (CheckoutException) { } } return obj3; } private void OnEditItems(object sender, EventArgs e) { object component = this._targetProperty.GetValue(this._designer.Component); if (component != null) { CollectionEditor editor = TypeDescriptor.GetEditor(component, typeof(UITypeEditor)) as CollectionEditor; if (editor != null) { editor.EditValue(this, this, component); } } } void ITypeDescriptorContext.OnComponentChanged() { this.ChangeService.OnComponentChanged(this._designer.Component, this._targetProperty, null, null); } bool ITypeDescriptorContext.OnComponentChanging() { try { this.ChangeService.OnComponentChanging(this._designer.Component, this._targetProperty); } catch (CheckoutException exception1) { if (exception1 != CheckoutException.Canceled) { throw; } return false; } return true; } object IServiceProvider.GetService(Type serviceType) { if ((serviceType == typeof(ITypeDescriptorContext)) || (serviceType == typeof(IWindowsFormsEditorService))) { return this; } if ((this._designer.Component != null) && (this._designer.Component.Site != null)) { return this._designer.Component.Site.GetService(serviceType); } return null; } void IWindowsFormsEditorService.CloseDropDown() { } void IWindowsFormsEditorService.DropDownControl(Control control) { } DialogResult IWindowsFormsEditorService.ShowDialog(Form dialog) { IUIService service = (IUIService)((IServiceProvider)this).GetService(typeof(IUIService)); if (service != null) { return service.ShowDialog(dialog); } return dialog.ShowDialog(this._designer.Component as IWin32Window); } // Properties private IComponentChangeService ChangeService { get { if (this._componentChangeSvc == null) { this._componentChangeSvc = (IComponentChangeService)((IServiceProvider)this).GetService(typeof(IComponentChangeService)); } return this._componentChangeSvc; } } IContainer ITypeDescriptorContext.Container { get { if (this._designer.Component.Site != null) { return this._designer.Component.Site.Container; } return null; } } object ITypeDescriptorContext.Instance { get { return this._designer.Component; } } PropertyDescriptor ITypeDescriptorContext.PropertyDescriptor { get { return this._targetProperty; } } }
Component.Site实现了IServiceProvider，关于ITypeDescriptorContext的IDK，我也在寻找它……
要获得IServiceProvider，您可以执行以下操作：var sp =（IServiceProvider）Component.Site;