我不是在寻找返回 bool 的两个结构的比较,我想知道是否有一种方法可以获取两个结构的哪些字段(相同的结构,但可能不同的值)是不同的。基本上我想要一种更简单的方法来执行以下操作:
public class Diff
{
public String VarName;
public object Val1;
public object Val2;
public Diff(String varName, object val1, object val2)
{
VarName = varName;
Val1 = val1;
Val2 = val2;
}
public override string ToString()
{
return VarName + " differs with values " + Val1 + " and " + Val2;
}
}
public struct TestStruct
{
public int ValueOne;
public int ValueTwo;
public int ValueThree;
public List Compare(TestStruct inTestStruct)
{
List diffs = new List();
if (ValueOne != inTestStruct.ValueOne)
{
diffs.Add(new Diff("ValueOne", ValueOne, inTestStruct.ValueOne));
}
if (ValueTwo != inTestStruct.ValueTwo)
{
diffs.Add(new Diff("ValueTwo", ValueTwo, inTestStruct.ValueTwo));
}
if (ValueThree != inTestStruct.ValueThree)
{
diffs.Add(new Diff("ValueThree", ValueThree, inTestStruct.ValueThree));
}
return diffs;
}
}
public CompareStructsExample()
{
TestStruct t1 = new TestStruct();
t1.ValueOne = 1;
t1.ValueTwo = 8;
t1.ValueThree = 5;
TestStruct t2 = new TestStruct();
t2.ValueOne = 3;
t2.ValueTwo = 8;
t2.ValueThree = 7;
List diffs = t1.Compare(t2);
foreach (Diff d in diffs)
{
System.Console.WriteLine(d.ToString());
}
}
我想知道是否有一种方法可以通过某种序列化来做到这一点,或者这是否是实际查看哪些值已更改的唯一方法。即使有更好的方法来实现 Compare 函数,我也会采用。
可以使用反射来完成。检查字段信息 http://msdn.microsoft.com/en-us/library/system.reflection.fieldinfo.aspx and 房产信息 http://msdn.microsoft.com/en-us/library/system.reflection.propertyinfo.aspx例子。
MSDN 示例(稍作修改):
Type myType = typeof(TestStruct);
// Get the fields of TestStruct.
FieldInfo[] myFieldInfo =
myType.GetFields(
BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public);
Console.WriteLine("\nThe fields of TestStruct are \n");
// Display the field information of TestStruct.
for(int i = 0; i < myFieldInfo.Length; i++)
{
Console.WriteLine("\nName : {0}", myFieldInfo[i].Name);
Console.WriteLine("Declaring Type : {0}", myFieldInfo[i].DeclaringType);
Console.WriteLine("IsPublic : {0}", myFieldInfo[i].IsPublic);
Console.WriteLine("MemberType : {0}", myFieldInfo[i].MemberType);
Console.WriteLine("FieldType : {0}", myFieldInfo[i].FieldType);
Console.WriteLine("IsFamily : {0}", myFieldInfo[i].IsFamily);
}
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