显示类型转换和as的区别-526互联

一、显示类型转换：

Dictionary<string,object> dict = new Dictionary<string,object>();
dict.Add("Id", "111");
dict.Add("Name", "NAMSDJFIDSJF");
dict.Add("Genger", true);

try
{
    var person = (Person)(object)dict;
}
catch (Exception ex)
{

    Console.WriteLine(ex.Message);
    
}

输出结果：

二、as转换：

Dictionary<string,object> dict = new Dictionary<string,object>();
dict.Add("Id", "111");
dict.Add("Name", "NAMSDJFIDSJF");
dict.Add("Genger", true);

try
{
    var person = (object)dict as Person;
    Console.WriteLine(person);
}
catch (Exception ex)
{

    Console.WriteLine(ex.Message);

}

输出结果：

三、结论

显示类型转换失败是直接抛出异常;
as转换转换失败是返回null.