Question

我有一个枚举：

foo = (PrivilegedAccounts) (rand());

我希望得到一个与用户不同的值。我知道有这个兰特（不确定是真的）：

CREATE TRIGGER updatehargaahs
ON tbl_hitash
AFTER INSERT
AS
    UPDATE tbl_ahs
    SET harga = (SELECT SUM(harga_satuan)
                 FROM tbl_hitash
                 WHERE tbl_ahs.id_ahs = tbl_hitash.id_ahs)
    WHERE id_ahs = inserted.id_ahs

但如何使其除了“user”以外的任何值？

谢谢，

Answer 1

我希望这就是你要找的东西。

public enum PrivilegedAccounts
{
    User = 1,
    Service = 16,
    Admin = 64,
    Other = 1040,
    Executive = 2048
}

 var values = Enum.GetValues(typeof(PrivilegedAccounts));
 SomeEnum randomValue = (PrivilegedAccounts)values[Random.Range(1, values.Length)]; //Start from 1 instead of 0 to avoid User

Answer 2

尝试这样的事情：

Random random = new Random();
int range_min = 1;
int range_max = 3;
int randomNumber;
do
{
    randomNumber = random.Next(range_min, range_max);    
} while (randomNumber == (Int32)PrivilegedAccounts.User);

Answer 3

1-首先计算Enum的数量

2-在计数之间设置随机数

3-创建Enum列表

4-返回Enum的索引

 Random rnd = new Random();
 var myEnumMemberCount = Enum.GetNames(typeof(PrivilegedAccounts)).Length; // Step1
 int count = rnd.Next(1, myEnumMemberCount); // creates a number between 1 and PrivilegedAccounts count //Step2 User is ignored
 Array eVals = Enum.GetValues(typeof(PrivilegedAccounts)); //Step3
 PrivilegedAccounts foo = (PrivilegedAccounts)eVals.GetValue(count); //Step4

Answer 4

您可以创建一个方法：

static PrivilegedAccounts GetRandPrivAccountExcluding(
                                PrivilegedAccounts excludedValue, Random rand)
{
    var privAccounts = Enum.GetValues(typeof(PrivilegedAccounts))
                            .OfType<PrivilegedAccounts>()
                            .Where(x => x != excludedValue)
                            .ToList();
    return privAccounts[rand.Next(privAccounts.Count)];
}

使用示例：

static void Main(string[] args)
{
    Random rand = new Random();
    var randPriviledge = GetRandPrivAccountExcluding(PrivilegedAccounts.User, rand);
}

兰德的价值不同于

4 个答案: