blocks|key|339551|text|你应该试试System.Reflection。下面是一个例子：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|339552|using+System;
using+System.Collections.Generic;
using+System.Linq;
using+System.Text;
using+System.Reflection;

namespace+AccessPrivateField
{
++++class+foo
++++{
++++++++public+foo(string+str)
++++++++{
++++++++++++this.str+=+str;
++++++++}
++++++++private+string+str;
++++++++public+string+Get()
++++++++{
++++++++++++return+this.str;
++++++++}
++++}
++++class+Program
++++{
++++++++static+void+Main(string[]+args)
++++++++{
++++++++++++foo+bar+=+new+foo("hello");
++++++++++++Console.WriteLine(bar.Get());
++++++++++++typeof(foo).GetField("str",+BindingFlags.NonPublic+%7C+BindingFlags.Instance).SetValue(bar,+"changed");
++++++++++++Console.WriteLine(bar.Get());
++++++++++++//output:
++++++++++++//hello
++++++++++++//changed
++++++++}
++++}
}|code-block|syntax|javascript|339553|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.reflection.aspx^0|5|H|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

You should try <a href="http://msdn.microsoft.com/en-us/library/system.reflection.aspx" rel="noreferrer">System.Reflection</a>. Here's an example:

<pre><code>using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;

namespace AccessPrivateField
{
 class foo
 {
 public foo(string str)
 {
 this.str = str;
 }
 private string str;
 public string Get()
 {
 return this.str;
 }
 }
 class Program
 {
 static void Main(string[] args)
 {
 foo bar = new foo("hello");
 Console.WriteLine(bar.Get());
 typeof(foo).GetField("str", BindingFlags.NonPublic | BindingFlags.Instance).SetValue(bar, "changed");
 Console.WriteLine(bar.Get());
 //output:
 //hello
 //changed
 }
 }
}
</code></pre>

blocks|key|339598|text|虽然使用反射可以做到这一点，但简单地从System.Guid.ToByteArray()检索c可能会更容易。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|339599|byte[]+guid+=+guid.ToByteArray();
short+c+=+(short)((guid[7]+<<+8)+%7C+guid[6]);|code-block|syntax|javascript|339600|由于此方法使用公共的和有文档记录的方法，因此它较少受版本之间的更改的影响。(通常，应该避免依赖私有实现细节，因为这些细节可能会因版本而异。)|339601|entityMap^0|J|P|1A|1|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

While it's possible to do this with reflection, it may be easier to simply retrieve <code>c</code> from <code>System.Guid.ToByteArray()</code>.

<pre><code>byte[] guid = guid.ToByteArray();
short c = (short)((guid[7] &lt;&lt; 8) | guid[6]);
</code></pre>

Since this approach uses public and documented methods, it is less subject to change between versions. (In general, relying on private implementation details should be avoided, since these details can change from version to version.)

blocks|key|339653|text|您可以使用扩展方法来获取任何类型的私有字段：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|339654|public+static+T+GetFieldValue<T>(this+object+obj,+string+name)+{
++++var+field+=+obj.GetType().GetField(name,+BindingFlags.Public+%7C+BindingFlags.NonPublic+%7C+BindingFlags.Instance);
++++return+(T)field?.GetValue(obj);
}|code-block|syntax|javascript|339655|然后访问任意类型的私有字段：|339656|Guid+id+=+Guid.NewGuid();
Int16+c+=+id.GetFieldValue<Int16>("_c");|339657|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You can have an extension method to get any private field of any type:

<pre><code>public static T GetFieldValue&lt;T&gt;(this object obj, string name) {
 var field = obj.GetType().GetField(name, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
 return (T)field?.GetValue(obj);
}
</code></pre>

And then access a private field of an arbitrary type:

<pre><code>Guid id = Guid.NewGuid();
Int16 c = id.GetFieldValue&lt;Int16&gt;("_c");
</code></pre>

Is it possible to get or set private fields?

I want to get <code>System.Guid.c</code>. Is there a way to access it or should I just copy the code from the strut and make the fields public?

Access private fields

是否可以获取或设置私有字段？我要去找System.Guid.c。有没有办法访问它，或者我应该只复制strut中的代码，并将字段公开？

问访问私有字段
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