參考：http://bbs.csdn.net/topics/380095345

參考：http://bbs.csdn.net/topics/390331033

轉自：http://blog.csdn.net/akron/article/details/2750566

版權聲明：本文為博主原創文章，未經博主允許不得轉載。

在VB6, VC++, C#.net?里都可以見到一個屬性設計器，用來編輯修改?object?的屬性。C#?下提供了一個屬性設計器?PropertyGrid，?其使用極其簡單，只要

?

??????grid.SelectedObject?=?myOjbect;

?

就可以把myOjbect?的所有屬性顯示出來。不過很多時候我們不希望如此，因為欠缺一種靈活性。我希望可以自由的控制需要編輯的內容。能做的這一點，再配合可編輯的?ListView，?可以很好的解決復雜內容的修改編輯問題。

?

首先是定義一個CProperty,?用來設置?object?在PropertyGrid?中的內容，?還得定義一個實現ICustomTypeDescriptor?接口的容器CPropertyCollection,?最后定制一個?PropertyDescriptor,?用來描述?PropertyGrid?接口方法。

?

?

???????public?class?CPropertyCollection?:?CCollection<CProperty>,?ICustomTypeDescriptor

???????{

??????????????public?void?Add(CProperty?value)

??????????????{

?????????????????????base.Put(value.Name, value);

??????????????}

?

??????????????#region?"TypeDescriptor"

?

??????????????public?String?GetClassName()

??????????????{

?????????????????????return?TypeDescriptor.GetClassName(this,?true);

??????????????}

?

??????????????public?AttributeCollection?GetAttributes()

??????????????{

?????????????????????return?TypeDescriptor.GetAttributes(this,?true);

??????????????}

?

??????????????public?String?GetComponentName()

??????????????{

?????????????????????return?TypeDescriptor.GetComponentName(this,?true);

??????????????}

?

??????????????public?TypeConverter?GetConverter()

??????????????{

?????????????????????return?TypeDescriptor.GetConverter(this,?true);

??????????????}

?

??????????????public?EventDescriptor?GetDefaultEvent()

??????????????{

?????????????????????return?TypeDescriptor.GetDefaultEvent(this,?true);

??????????????}

?

??????????????public?PropertyDescriptor?GetDefaultProperty()

??????????????{

?????????????????????return?TypeDescriptor.GetDefaultProperty(this,?true);

??????????????}

?

??????????????public?object?GetEditor(Type?editorBaseType)

??????????????{

?????????????????????return?TypeDescriptor.GetEditor(this, editorBaseType,?true);

??????????????}

?

??????????????public?EventDescriptorCollection?GetEvents(Attribute[] attributes)

??????????????{

?????????????????????return?TypeDescriptor.GetEvents(this, attributes,?true);

??????????????}

?

??????????????public?EventDescriptorCollection?GetEvents()

??????????????{

?????????????????????return?TypeDescriptor.GetEvents(this,?true);

??????????????}

?

??????????????public?PropertyDescriptorCollection?GetProperties(Attribute[] attributes)

??????????????{

?????????????????????PropertyDescriptor[] propDes?=?new?PropertyDescriptor[this.Count];

?????????????????????for?(int?i?=?0; i?<?this.Count; i++) {

????????????????????????????CProperty?prop?=?(CProperty)?this[i];

????????????????????????????propDes[i]?=?new?CPropertyDescriptor(ref?prop, attributes);

?????????????????????}

?????????????????????return?new?PropertyDescriptorCollection(propDes);

??????????????}

?

??????????????public?PropertyDescriptorCollection?GetProperties()

??????????????{

?????????????????????return?TypeDescriptor.GetProperties(this,?true);

??????????????}

?

??????????????public?object?GetPropertyOwner(PropertyDescriptor?pd)

??????????????{

?????????????????????return?this;

??????????????}

??????????????#endregion

???????}

?

???????public?class?CProperty

???????{

??????????????private?string?m_Name?=?string.Empty;

??????????????private?bool?m_bReadOnly?=?false;

??????????????private?bool?m_bVisible?=?true;

??????????????private?object?m_Value?=?null;

??????????????private?string?m_Category?=?string.Empty;

??????????????TypeConverter?m_Converter?=?null;

??????????????object?m_Editor?=?null;

?

?

??????????????public?CProperty(string?name,?object?value)

??????????????{

?????????????????????m_Name?=?name;

?????????????????????m_Value?=?value;

??????????????}

?

??????????????public?CProperty(string?name,?object?value,?bool?bReadOnly,?bool?bVisible)

??????????????{

?????????????????????m_Name?=?name;

?????????????????????m_Value?=?value;

?????????????????????m_bReadOnly?=?bReadOnly;

?????????????????????m_bVisible?=?bVisible;

??????????????}

?

??????????????public?bool?ReadOnly

??????????????{

?????????????????????get?{?return?m_bReadOnly; }

?????????????????????set?{ m_bReadOnly?=?value; }

??????????????}

?

??????????????public?virtual?TypeConverter?Converter

??????????????{

?????????????????????get?{?return?m_Converter; }

?????????????????????set?{ m_Converter?=?value; }

??????????????}

?

??????????????public?string?Name

??????????????{

?????????????????????get?{?return?m_Name; }

?????????????????????set?{ m_Name?=?value; }

??????????????}

?

??????????????public?bool?Visible

??????????????{

?????????????????????get?{?return?m_bVisible; }

?????????????????????set?{ m_bVisible?=?value; }

??????????????}

?

??????????????public?virtual?object?Value

??????????????{

?????????????????????get?{?return?m_Value; }

?????????????????????set?{ m_Value?=?value; }

??????????????}

?

??????????????public?string?Category

??????????????{

?????????????????????get?{?return?m_Category; }

?????????????????????set?{ m_Category?=?value; }

??????????????}

?

??????????????public?virtual?object?Editor

??????????????{

?????????????????????get?{?return?m_Editor; }

?????????????????????set?{ m_Editor?=?value;??}

??????????????}

???????}

?

?

???????public?class?CPropertyDescriptor?:?PropertyDescriptor

???????{

??????????????CProperty?m_Property;

?

??????????????public?CPropertyDescriptor(ref?CProperty?property,?Attribute[] attrs)

?????????????????????:?base(property.Name, attrs)

??????????????{

?????????????????????m_Property?=?property;

??????????????}

?

??????????????#region?PropertyDescriptor "region"

?

??????????????public?override?bool?CanResetValue(object?component)

??????????????{

?????????????????????return?false;

??????????????}

?

??????????????public?override?Type?ComponentType

??????????????{

?????????????????????get?{?return?null; }

??????????????}

?

??????????????public?override?object?GetValue(object?component)

??????????????{

?????????????????????return?m_Property.Value;

??????????????}

?

??????????????public?override?string?Description

??????????????{

?????????????????????get?{?return?m_Property.Name; }

??????????????}

?

??????????????public?override?string?Category

??????????????{

?????????????????????get?{?return?m_Property.Category; }

??????????????}

?

??????????????public?override?string?DisplayName

??????????????{

?????????????????????get?{?return?m_Property.Name; }

??????????????}

?

??????????????public?override?bool?IsReadOnly

??????????????{

?????????????????????get?{?return?m_Property.ReadOnly; }

??????????????}

?

??????????????public?override?TypeConverter?Converter

??????????????{

?????????????????????get?{?return?m_Property.Converter; }

??????????????}

?

??????????????public?override?void?ResetValue(object?component)

??????????????{

??????????????}

?

??????????????public?override?bool?ShouldSerializeValue(object?component)

??????????????{

?????????????????????return?false;

??????????????}

?

??????????????public?override?void?SetValue(object?component,?object?value)

??????????????{

?????????????????????m_Property.Value?=?value;

??????????????}

?

??????????????public?override?Type?PropertyType

??????????????{

?????????????????????get?{?return?m_Property.Value.GetType(); }

??????????????}

?

??????????????public?override?object?GetEditor(Type?editorBaseType)

??????????????{

?????????????????????return?m_Property.Editor?==?null???base.GetEditor(editorBaseType) : m_Property.Editor;

??????????????}

??????????????#endregion

???????}

?

?

?

下面的事情變得很簡單：

?

???????private?void?Form_Load(object?sender,?EventArgs?e)

??????????????{

?????????????????????CProperty?myProp1?=?new?CProperty("Test1",?"test");

?????????????????????MyProp1.Category?=?"test";

?????????????????????CProperty?myProp2?=?new?CProperty("Test2",?1);

?????????????????????myProp2.Editor = new System.Drawing.Design.ColorEditor();

?????????????????????myProperties.Add(myProp1);

?????????????????????myProperties.Add(myProp2);

?????????????????????grid.SelectedObject?=?myProperties;

??????????????}

?

?

可以看到通過CProperty.Editor?可以使用各種的編輯器，甚至自定義的編輯器（從?UITypeEditor?派生，msdn中有例子）。另一個要點是CProperty.Converter,?用來自定義如何進行類型轉換，例如，enum?類型在PropertyGrid?中用?List?編輯，如果不想事先定義一個?enum,?可以用自己的?TypeConverter?來實現功能更強大的編輯方法。

?

???????public?class?ListConverter?:?StringConverter

???????{

??????????????object[] m_Objects;

??????????????public?ListConverter(object[] objects)

??????????????{

?????????????????????m_Objects?=?objects;

??????????????}

?

??????????????public?override?bool?GetStandardValuesSupported(ITypeDescriptorContext?context)

??????????????{

?????????????????????return?true;

??????????????}

??????????????public?override?bool?GetStandardValuesExclusive(ITypeDescriptorContext?context)

??????????????{

?????????????????????return?true;

??????????????}

?

??????????????public?override

??????????????System.ComponentModel.TypeConverter.StandardValuesCollection?GetStandardValues(ITypeDescriptorContext?context)

??????????????{

?????????????????????return?new?StandardValuesCollection(m_Objects);

??????????????}

???????}?

?

使用ListConverter：

?

????????????CProperty?myProp?=?new?CProperty("Test",?"test2");

????????????myProp.Converter?=?new?ListConverter(new?string[] {?"test1",?"test2","test3"?});

?

?

當click?屬性?Test?時，會彈出一個?List?框。重載?TypeConverter?的?ConvertTo and ConvertFrom?可以獲得更多的功能。

轉載于:https://www.cnblogs.com/Joetao/articles/5432316.html

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