我执行以下代码:C#泛型类型是盒装?
using System;
using System.Collections.Generic;
namespace TestReleaseAndDebug
{
public class GClass<T1, T2>
{
public T1 Name { get; set; }
public T2 Age { get; set; }
public void Display()
{
Console.WriteLine("Name: " + Name);
Console.WriteLine("Age: " + Age);
}
}
class Program
{
static void Main(string[] args)
{
GClass<string, int> person = new GClass<string, int>();
person.Name = "RAM";
person.Age = 34;
string name = "RAM";
int age = 34;
Console.WriteLine("Name: " + name);
Console.WriteLine("Age: " + age);
person.Display();
Console.Read();
}
}
}
我有在主函数两个局部变量他们的姓名和年龄。我使用console.writeline方法打印它们。它打印没有任何问题。主要方法的IL如下所示:
.method private hidebysig static void Main(string[] args) cil managed
{
.entrypoint
// Code size 90 (0x5a)
.maxstack 2
.locals init ([0] class TestReleaseAndDebug.GClass`2<string,int32> person,
[1] string name,
[2] int32 age)
IL_0000: nop
IL_0001: newobj instance void class TestReleaseAndDebug.GClass`2<string,int32>::.ctor()
IL_0006: stloc.0
IL_0007: ldloc.0
IL_0008: ldstr "RAM"
IL_000d: callvirt instance void class TestReleaseAndDebug.GClass`2<string,int32>::set_Name(!0)
IL_0012: nop
IL_0013: ldloc.0
IL_0014: ldc.i4.s 34
IL_0016: callvirt instance void class TestReleaseAndDebug.GClass`2<string,int32>::set_Age(!1)
IL_001b: nop
IL_001c: ldstr "RAM"
IL_0021: stloc.1
IL_0022: ldc.i4.s 34
IL_0024: stloc.2
IL_0025: ldstr "Name: "
IL_002a: ldloc.1
IL_002b: call string [mscorlib]System.String::Concat(string,
string)
IL_0030: call void [mscorlib]System.Console::WriteLine(string)
IL_0035: nop
IL_0036: ldstr "Age: "
IL_003b: ldloc.2
IL_003c: box [mscorlib]System.Int32
IL_0041: call string [mscorlib]System.String::Concat(object,
object)
IL_0046: call void [mscorlib]System.Console::WriteLine(string)
IL_004b: nop
IL_004c: ldloc.0
IL_004d: callvirt instance void class TestReleaseAndDebug.GClass`2<string,int32>::Display()
IL_0052: nop
IL_0053: call int32 [mscorlib]System.Console::Read()
IL_0058: pop
IL_0059: ret
} // end of method Program::Main
我有另一个泛型类'GClass'。在泛型类中,我有两个属性和一个方法(Display)。在Display方法中,我使用与Main方法中显示局部变量相同的方式显示两个属性。通用类显示方法的IL下面给出:
.method public hidebysig instance void Display() cil managed
{
// Code size 56 (0x38)
.maxstack 8
IL_0000: nop
IL_0001: ldstr "Name: "
IL_0006: ldarg.0
IL_0007: call instance !0 class TestReleaseAndDebug.GClass`2<!T1,!T2>::get_Name()
IL_000c: box !T1
IL_0011: call string [mscorlib]System.String::Concat(object,
object)
IL_0016: call void [mscorlib]System.Console::WriteLine(string)
IL_001b: nop
IL_001c: ldstr "Age: "
IL_0021: ldarg.0
IL_0022: call instance !1 class TestReleaseAndDebug.GClass`2<!T1,!T2>::get_Age()
IL_0027: box !T2
IL_002c: call string [mscorlib]System.String::Concat(object,
object)
IL_0031: call void [mscorlib]System.Console::WriteLine(string)
IL_0036: nop
IL_0037: ret
} // end of method GClass`2::Display
我传递“字符串”作为类型参数T1和使用这种类型的声明名称属性。当使用Console.Writeline显示名称属性时,它将装箱名称(IL_000c:box!T1)。你可以在IL中找到它。
为什么拳击发生,尽管它是一个字符串类型?
这是一个帖子中有很多代码。您应该考虑将IL片段缩小到显示您问题的线条。 – 2010-07-21 10:05:28
也检查此:http://stackoverflow.com/questions/32664/c-generic-constraint-for-only-integers – 2010-07-21 10:17:32