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标题: C#中接口成员的显示实现和隐式实现有什么区别? [打印本页]
作者: hongiqnglik 时间: 2013-8-13 00:33
标题: C#中接口成员的显示实现和隐式实现有什么区别?
C#中接口成员的显示实现和隐式实现有什么区别?它们各自的作用是什么?
作者: 许庭洲 时间: 2013-8-13 06:37
//接口 IDimensions 和一个类 Box,该类显式实现接口成员 getLength 和 getWidth。通过接口实例 dimensions 访问这些成员。
interface IDimensions
{
floatgetLength();
floatgetWidth();
}
class Box : IDimensions
{
floatlengthInches;
floatwidthInches;
Box(float length, float width)
{
lengthInches = length;
widthInches = width;
}
//Explicit interface member implementation:
floatIDimensions.getLength()
{
return lengthInches;
}
//Explicit interface member implementation:
floatIDimensions.getWidth()
{
return widthInches;
}
staticvoid Main()
{
//Declare a class instance box1:
Box box1 = new Box(30.0f, 20.0f);
//Declare an interface instance dimensions:
IDimensions dimensions = (IDimensions)box1;
//The following commented lines would produce compilation
//errors because they try to access an explicitly implemented
//interface member from a class instance:
//System.Console.WriteLine("Length: {0}", box1.getlength());
//System.Console.WriteLine("Width: {0}", box1.getwidth());
//Print out the dimensions of the box by calling the methods
//from an instance of the interface:
System.Console.WriteLine("Length: {0}", dimensions.getLength());
System.Console.WriteLine("Width: {0}", dimensions.getWidth());
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Length: 30
Width: 20
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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