使用 == 比较两个结构体 [英] Comparing two structs using ==
问题描述
我正在尝试在 C# 中使用等号 (==) 来比较两个结构.我的结构如下:
I am trying to compare two structs using equals (==) in C#. My struct is below:
public struct CisSettings : IEquatable<CisSettings>
{
public int Gain { get; private set; }
public int Offset { get; private set; }
public int Bright { get; private set; }
public int Contrast { get; private set; }
public CisSettings(int gain, int offset, int bright, int contrast) : this()
{
Gain = gain;
Offset = offset;
Bright = bright;
Contrast = contrast;
}
public bool Equals(CisSettings other)
{
return Equals(other, this);
}
public override bool Equals(object obj)
{
if (obj == null || GetType() != obj.GetType())
{
return false;
}
var objectToCompareWith = (CisSettings) obj;
return objectToCompareWith.Bright == Bright && objectToCompareWith.Contrast == Contrast &&
objectToCompareWith.Gain == Gain && objectToCompareWith.Offset == Offset;
}
public override int GetHashCode()
{
var calculation = Gain + Offset + Bright + Contrast;
return calculation.GetHashCode();
}
}
我正在尝试将 struct 作为我的类中的一个属性,并想在继续之前检查该 struct 是否等于我尝试分配给它的值,所以我不是指示属性已更改,但未更改,如下所示:
I am trying to have struct as a property in my class, and want to check to see if the struct is equal to the value I am trying to assign it to, before I go ahead and do so, so I am not indicating the property has changed when it hasn't, like so:
public CisSettings TopCisSettings
{
get { return _topCisSettings; }
set
{
if (_topCisSettings == value)
{
return;
}
_topCisSettings = value;
OnPropertyChanged("TopCisSettings");
}
}
但是,在我检查相等性的行中,我收到此错误:
However, on the line where I check for equality, I get this error:
运算符=="不能应用于CisSettings"类型的操作数和'顺式设置'
Operator '==' cannot be applied to operands of type 'CisSettings' and 'CisSettings'
我不明白为什么会这样,有人能指出我正确的方向吗?
I can't figure out why this is happening, could somebody point me in the right direction?
推荐答案
您需要重载 ==
和 !=
运算符.将此添加到您的 struct
中:
You need to overload the ==
and !=
operators. Add this to your struct
:
public static bool operator ==(CisSettings c1, CisSettings c2)
{
return c1.Equals(c2);
}
public static bool operator !=(CisSettings c1, CisSettings c2)
{
return !c1.Equals(c2);
}
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