C#中有符号整数与无符号整数之间的二进制值拷贝
<p>因为我现在需要将<code>uint</code>作为字典的键进行存储，这就需要编写一个<code>GetHashCode()</code>，那么最好的办法就是直接把它的二进制值拷贝为1个<code>int</code>。</p><p>这里给出我的<code>int</code>和<code>uint</code>之间的直接拷贝方法：</p>
<pre><code class="language-csharp">int x;
uint y;
y = BitConverter.ToUInt32(BitConverter.GetBytes(x), 0);
x = BitConverter.ToInt32(BitConverter.GetBytes(y), 0);
</code></pre>
<p>那么<code>GetHashCode()</code>就长这样了：</p>
<pre><code class="language-csharp">using System;
public interface IIdUsingUInt32
{
Int32 id { get; set; }// 为了适配数据库的命名风格，并避免命名转换，这里直接使用下划线命名法。
public class EqualityComparer : IEqualityComparer<IIdUsingUInt32>
{
public bool Equals(IIdUsingUInt32 x, IIdUsingUInt32 y) => x.id == y.id;
public int GetHashCode(IIdUsingUInt32 obj) => BitConverter.ToInt32(BitConverter.GetBytes(obj.id), 0);
}
}
</code></pre>
</div>
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<p>本文来自博客园，作者：Orange233，转载请注明原文链接：https://www.cnblogs.com/orange233/p/18997397/convert-between-unsigned-and-signed-value-by-directly-copy-its-binary-value</p><br><br>
来源：https://www.cnblogs.com/orange233/p/18997397/convert-between-unsigned-and-signed-value-by-directly-copy-its-binary-value
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