[英]How do I convert uint to int in C#?
如何在C#中将uint转换为int?
Given: 鉴于:
uint n = 3;
int i = checked((int)n); //throws OverflowException if n > Int32.MaxValue
int i = unchecked((int)n); //converts the bits only
//i will be negative if n > Int32.MaxValue
int i = (int)n; //same behavior as unchecked
or 要么
int i = Convert.ToInt32(n); //same behavior as checked
--EDIT - 编辑
Assuming you want to simply lift the 32bits from one type and dump them as-is into the other type: 假设您只想从一种类型中提取32位并将它们原样转储到另一种类型中:
uint asUint = unchecked((uint)myInt);
int asInt = unchecked((int)myUint);
The destination type will blindly pick the 32 bits and reinterpret them. 目标类型将盲目地选取32位并重新解释它们。
Conversely if you're more interested in keeping the decimal/numerical values within the range of the destination type itself: 相反,如果您更感兴趣的是将十进制/数值保持在目标类型本身的范围内:
uint asUint = checked((uint)myInt);
int asInt = checked((int)myUint);
In this case, you'll get overflow exceptions if: 在这种情况下,如果出现以下情况,您将获得溢出异常
In our case, we wanted the unchecked
solution to preserve the 32bits as-is, so here are some examples: 在我们的例子中,我们希望
unchecked
解决方案按原样保留32位,所以这里有一些例子:
int....: 0000000000 (00-00-00-00)
asUint.: 0000000000 (00-00-00-00)
------------------------------
int....: 0000000001 (01-00-00-00)
asUint.: 0000000001 (01-00-00-00)
------------------------------
int....: -0000000001 (FF-FF-FF-FF)
asUint.: 4294967295 (FF-FF-FF-FF)
------------------------------
int....: 2147483647 (FF-FF-FF-7F)
asUint.: 2147483647 (FF-FF-FF-7F)
------------------------------
int....: -2147483648 (00-00-00-80)
asUint.: 2147483648 (00-00-00-80)
uint...: 0000000000 (00-00-00-00)
asInt..: 0000000000 (00-00-00-00)
------------------------------
uint...: 0000000001 (01-00-00-00)
asInt..: 0000000001 (01-00-00-00)
------------------------------
uint...: 2147483647 (FF-FF-FF-7F)
asInt..: 2147483647 (FF-FF-FF-7F)
------------------------------
uint...: 4294967295 (FF-FF-FF-FF)
asInt..: -0000000001 (FF-FF-FF-FF)
------------------------------
int[] testInts = { 0, 1, -1, int.MaxValue, int.MinValue };
uint[] testUints = { uint.MinValue, 1, uint.MaxValue / 2, uint.MaxValue };
foreach (var Int in testInts)
{
uint asUint = unchecked((uint)Int);
Console.WriteLine("int....: {0:D10} ({1})", Int, BitConverter.ToString(BitConverter.GetBytes(Int)));
Console.WriteLine("asUint.: {0:D10} ({1})", asUint, BitConverter.ToString(BitConverter.GetBytes(asUint)));
Console.WriteLine(new string('-',30));
}
Console.WriteLine(new string('=', 30));
foreach (var Uint in testUints)
{
int asInt = unchecked((int)Uint);
Console.WriteLine("uint...: {0:D10} ({1})", Uint, BitConverter.ToString(BitConverter.GetBytes(Uint)));
Console.WriteLine("asInt..: {0:D10} ({1})", asInt, BitConverter.ToString(BitConverter.GetBytes(asInt)));
Console.WriteLine(new string('-', 30));
}
Convert.ToInt32()
将uint
作为值。
I would say using tryParse, it'll return 'false' if the uint is to big for an int. 我会说使用tryParse,如果uint对于int来说很大,那么它将返回'false'。
Don't forget that a uint can go much bigger than a int, as long as you going > 0 不要忘记,只要你> 0,uint就可以比int大得多
假设uint中包含的值可以用int表示,那么它就像这样简单:
int val = (int) uval;
uint i = 10;
int j = (int)i;
or 要么
int k = Convert.ToInt32(i)
int intNumber = (int)uintNumber;
Depending on what kind of values you are expecting, you may want to check how big uintNumber is before doing the conversion. 根据您期望的值,您可能需要在进行转换之前检查uintNumber的大小。 An int has a max value of about .5 of a uint.
int的最大值约为.5的uint。
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