将变量与多个值进行比较[重复]

if(new[]{BillType.Receipt,BillType.Bill,BillType.Payment}.Contains(type)){}

public static class MyExtensions
{
    public static bool IsIn<T>(this T @this, params T[] possibles)
    {
        return possibles.Contains(@this);
    }
}

然后通过以下方式进行调用:

if(type.IsIn(BillType.Receipt,BillType.Bill,BillType.Payment)){}

还有switch语句

switch(type) {
    case BillType.Bill:
    case BillType.Payment:
    case BillType.Receipt:
        // Do stuff
        break;
}

假设类型是枚举,则可以使用 FlagsAttribute

[Flags]
enum BillType
{
    None = 0,
    Bill = 2,
    Payment = 4,
    Receipt = 8
}

if ((type & (BillType.Bill | BillType.Payment | BillType.Receipt)) != 0)
{
    //do stuff
}

尝试使用开关

 switch (type)
    {
        case BillType.Bill:
        case BillType.Payment:

        break;
    }

尝试对值列表使用C#HashSet。如果需要将多个值与单个值集进行比较,则这一点尤其有用。

尝试查看策略设计模式(也称策略设计模式)。

public interface IBillTypePolicy
{
    public BillType { get; }
    void HandleBillType();
}
public class BillPolicy : IBillTypePolicy
{
    public BillType BillType { get { return BillType.Bill; } }

    public void HandleBillType() 
    { 
        // your code here...
    }
}

这里有一个 great post on how to dynamically resolve the policy

http://maniish.wordpress.com/2007/09/27/iterate-through-enumeration-c/