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		<title>在方法中使用参数数组</title>
		<link>http://thinklouder.cn/2008/12/parameter-array-in-methods/</link>
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		<pubDate>Tue, 16 Dec 2008 18:09:40 +0000</pubDate>
		<dc:creator>Sun Liwen</dc:creator>
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		<category><![CDATA[.NET]]></category>
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		<description><![CDATA[如需向方法中传入个数不定的数组参数，可使用params关键字。具体使用方法如下。 private string Concatenate&#40;string separator, params object&#91;&#93; parts&#41; &#123; System.Text.StringBuilder buffer = new System.Text.StringBuilder&#40;&#41;; string sepValue = &#34;&#34;; foreach &#40;object o in parts&#41; &#123; buffer.AppendFormat&#40;&#34;{0}{1}&#34;, sepValue, o&#41;; sepValue = separator; &#125; return buffer.ToString&#40;&#41;; &#125; 在使用时会是如下的写法： string result = Concatenate&#40;&#34; &#34;, &#34;test1&#34;, &#34;test2&#34;, &#34;test3&#34;&#41;; Tags: .NET, Tips No comment]]></description>
			<content:encoded><![CDATA[<p>如需向方法中传入个数不定的数组参数，可使用params关键字。具体使用方法如下。</p>

<div class="wp_syntax"><div class="code"><pre class="csharp" style="font-family:monospace;"><span style="color: #0600FF;">private</span> <span style="color: #FF0000;">string</span> Concatenate<span style="color: #000000;">&#40;</span><span style="color: #FF0000;">string</span> separator, <span style="color: #0600FF;">params</span> <span style="color: #FF0000;">object</span><span style="color: #000000;">&#91;</span><span style="color: #000000;">&#93;</span> parts<span style="color: #000000;">&#41;</span>
<span style="color: #000000;">&#123;</span>
   <span style="color: #000000;">System.<span style="color: #0000FF;">Text</span></span>.<span style="color: #0000FF;">StringBuilder</span> buffer <span style="color: #008000;">=</span> <span style="color: #008000;">new</span> <span style="color: #000000;">System.<span style="color: #0000FF;">Text</span></span>.<span style="color: #0000FF;">StringBuilder</span><span style="color: #000000;">&#40;</span><span style="color: #000000;">&#41;</span><span style="color: #008000;">;</span>
   <span style="color: #FF0000;">string</span> sepValue <span style="color: #008000;">=</span> <span style="color: #666666;">&quot;&quot;</span><span style="color: #008000;">;</span>
   <span style="color: #0600FF;">foreach</span> <span style="color: #000000;">&#40;</span><span style="color: #FF0000;">object</span> o <span style="color: #0600FF;">in</span> parts<span style="color: #000000;">&#41;</span>
   <span style="color: #000000;">&#123;</span>
      buffer.<span style="color: #0000FF;">AppendFormat</span><span style="color: #000000;">&#40;</span><span style="color: #666666;">&quot;{0}{1}&quot;</span>, sepValue, o<span style="color: #000000;">&#41;</span><span style="color: #008000;">;</span>
      sepValue <span style="color: #008000;">=</span> separator<span style="color: #008000;">;</span>
   <span style="color: #000000;">&#125;</span>
   <span style="color: #0600FF;">return</span> buffer.<span style="color: #0000FF;">ToString</span><span style="color: #000000;">&#40;</span><span style="color: #000000;">&#41;</span><span style="color: #008000;">;</span>
<span style="color: #000000;">&#125;</span></pre></div></div>

<p>在使用时会是如下的写法：</p>

<div class="wp_syntax"><div class="code"><pre class="csharp" style="font-family:monospace;"><span style="color: #FF0000;">string</span> result <span style="color: #008000;">=</span> Concatenate<span style="color: #000000;">&#40;</span><span style="color: #666666;">&quot; &quot;</span>, <span style="color: #666666;">&quot;test1&quot;</span>, <span style="color: #666666;">&quot;test2&quot;</span>, <span style="color: #666666;">&quot;test3&quot;</span><span style="color: #000000;">&#41;</span><span style="color: #008000;">;</span></pre></div></div>

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