.NET Framework3.5中是否存在与.NET 4 Tuple等效的类
我想使用它来从一个方法返回多个值,而不是创建一个struct
。
发布于 2011-08-19 20:23:00
我在我的pre-4项目中使用了这个:
public class Tuple<T1>
{
public Tuple(T1 item1)
{
Item1 = item1;
}
public T1 Item1 { get; set; }
}
public class Tuple<T1, T2> : Tuple<T1>
{
public Tuple(T1 item1, T2 item2) : base(item1)
{
Item2 = item2;
}
public T2 Item2 { get; set; }
}
public class Tuple<T1, T2, T3> : Tuple<T1, T2>
{
public Tuple(T1 item1, T2 item2, T3 item3) : base(item1, item2)
{
Item3 = item3;
}
public T3 Item3 { get; set; }
}
public static class Tuple
{
public static Tuple<T1> Create<T1>(T1 item1)
{
return new Tuple<T1>(item1);
}
public static Tuple<T1, T2> Create<T1, T2>(T1 item1, T2 item2)
{
return new Tuple<T1, T2>(item1, item2);
}
public static Tuple<T1, T2, T3> Create<T1, T2, T3>(T1 item1, T2 item2, T3 item3)
{
return new Tuple<T1, T2, T3>(item1, item2, item3);
}
}
发布于 2011-08-19 21:22:00
如果您需要它们具有与.Net 4.0相同的功能(主要是比较):
static class Tuple
{
public static Tuple<T1, T2> Create<T1, T2>(T1 item1, T2 item2)
{
return new Tuple<T1, T2>(item1, item2);
}
}
[DebuggerDisplay("Item1={Item1};Item2={Item2}")]
class Tuple<T1, T2> : IFormattable
{
public T1 Item1 { get; private set; }
public T2 Item2 { get; private set; }
public Tuple(T1 item1, T2 item2)
{
Item1 = item1;
Item2 = item2;
}
#region Optional - If you need to use in dictionaries or check equality
private static readonly IEqualityComparer<T1> Item1Comparer = EqualityComparer<T1>.Default;
private static readonly IEqualityComparer<T2> Item2Comparer = EqualityComparer<T2>.Default;
public override int GetHashCode()
{
var hc = 0;
if (!object.ReferenceEquals(Item1, null))
hc = Item1Comparer.GetHashCode(Item1);
if (!object.ReferenceEquals(Item2, null))
hc = (hc << 3) ^ Item2Comparer.GetHashCode(Item2);
return hc;
}
public override bool Equals(object obj)
{
var other = obj as Tuple<T1, T2>;
if (object.ReferenceEquals(other, null))
return false;
else
return Item1Comparer.Equals(Item1, other.Item1) && Item2Comparer.Equals(Item2, other.Item2);
}
#endregion
#region Optional - If you need to do string-based formatting
public override string ToString() { return ToString(null, CultureInfo.CurrentCulture); }
public string ToString(string format, IFormatProvider formatProvider)
{
return string.Format(formatProvider, format ?? "{0},{1}", Item1, Item2);
}
#endregion
}
发布于 2015-11-26 12:06:45
您可以通过nuget安装NetLegacySupport.Tuple
。这是从.Net 4.5向后移植到.Net 2.0和3.5的元组类。
您可以通过Visual Studio中的包管理器或在命令行上使用nuget来安装它。
这是nuget包:
https://stackoverflow.com/questions/7120845
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