Jun*_*nZe 0 .net c# reflection
我想知道是否有办法找到对象是数组还是IEnumerable,它比这更漂亮:
var arrayFoo = new int[] { 1, 2, 3 };
var testArray = IsArray(arrayFoo);
// return true
var testArray2 = IsIEnumerable(arrayFoo);
// return false
var listFoo = new List<int> { 1, 2, 3 };
var testList = IsArray(listFoo);
// return false
var testList2 = IsIEnumerable(listFoo);
// return true
private bool IsArray(object obj)
{
Type arrayType = obj.GetType().GetElementType();
return arrayType != null;
}
private bool IsIEnumerable(object obj)
{
Type ienumerableType = obj.GetType().GetGenericArguments().FirstOrDefault();
return ienumerableType != null;
}
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is
C#中有一个关键字:
private bool IsArray(object obj)
{
return obj is Array;
}
private bool IsIEnumerable(object obj)
{
return obj is IEnumerable;
}
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这有帮助吗?
"是"关键字
检查对象是否与给定类型兼容.
static void Test(object value)
{
Class1 a;
Class2 b;
if (value is Class1)
{
Console.WriteLine("o is Class1");
a = (Class1)o;
// Do something with "a."
}
}
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"as"关键字
尝试将值转换为给定类型.如果强制转换失败,则返回null.
Class1 b = value as Class1;
if (b != null)
{
// do something with b
}
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参考
"是"关键字
http://msdn.microsoft.com/en-us/library/scekt9xw(v=vs.110).aspx
"as"关键字
http://msdn.microsoft.com/en-us/library/cscsdfbt(v=vs.110).aspx