使用ThreadingWinform程序只允许运行一个实例代码,CSharp代码库,德仔网

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【CSharp】使用ThreadingWinform程序只允许运行一个实例
作者:Dezai.CN / 发布于2011/9/14/ 688
<div>在WinForm应用程序中，经常会要求在一台机器上，某时刻应用程序只能够有一个实例运行。使用Threading的互斥基本元素（同步信号）可以轻松的实现。在启动对象类中添加如下如下限制即可：
<pre><span class="keyword"><font color="#990000">         using<font color="#000000"> System</font><span class="operator"><strong><font color="#663300">.</font></strong></span><font color="#000000">Threading</font><span class="operator"><strong><font color="#663300">;
</font></strong></span></font></span></pre>
<pre><span class="keyword"><font color="#990000"><span class="operator"><strong><font color="#663300">        [</font></strong></span><font color="#000000">STAThread</font><span class="operator"><strong><font color="#663300">]</font></strong></span><span class="keyword">
        static</span><span class="type"><font color="#ff6633"> void</font></span><font color="#000000"> Main</font><span class="operator"><strong><font color="#663300">()
        {</font></strong></span><span class="type">
<font color="#ff6633">            bool</font></span><font color="#000000"> create</font><span class="operator"><strong><font color="#663300">;</font></strong></span><span class="keyword">
            using</span><span class="operator"><strong><font color="#663300"> (</font></strong></span><font color="#000000">Mutex mu</font><span class="operator"><strong><font color="#663300"> =</font></strong></span><span class="keyword"> new</span><font color="#000000"> Mutex</font><strong><span class="operator"><font color="#663300">(</font></span><span class="bool"><font color="#000000">true</font></span><span class="operator"><font color="#663300">,</font></span></strong><font color="#000000"> Application</font><span class="operator"><strong><font color="#663300">.</font></strong></span><font color="#000000">ProductName</font><span class="operator"><strong><font color="#663300">,</font></strong></span><font color="#000000"> out create</font><span class="operator"><strong><font color="#663300">))
            {</font></strong></span><span class="flow">
<font color="#ff0000">                if</font></span><span class="operator"><strong><font color="#663300"> (</font></strong></span><font color="#000000">create</font><span class="operator"><strong><font color="#663300">)
                {</font></strong></span>
<font color="#000000">                    Run</font><span class="operator"><strong><font color="#663300">();
                }</font></strong></span><span class="flow">
<font color="#ff0000">                else</font></span><span class="operator">
<strong><font color="#663300">                {</font></strong></span>
<font color="#000000">                    MessageBox</font><span class="operator"><strong><font color="#663300">.</font></strong></span><font color="#000000">Show</font><span class="operator"><strong><font color="#663300">(</font></strong></span><span class="string"><font color="#009900">"程序已经运行!"</font></span><span class="operator"><strong><font color="#663300">);
                }
            }
            
        }</font></strong></span><span class="comment">

<em><font color="#999999">        /// <summary>
        /// 启动程序
        /// </summary>
</font></em></span><span class="keyword">        static</span><span class="type"><font color="#ff6633"> void</font></span><font color="#000000"> Run</font><span class="operator"><strong><font color="#663300">()
        {</font></strong></span>
<font color="#000000">            Application</font><span class="operator"><strong><font color="#663300">.</font></strong></span><font color="#000000">EnableVisualStyles</font><span class="operator"><strong><font color="#663300">();</font></strong></span>
<font color="#000000">            Application</font><span class="operator"><strong><font color="#663300">.</font></strong></span><font color="#000000">SetCompatibleTextRenderingDefault</font><strong><span class="operator"><font color="#663300">(</font></span><span class="bool"><font color="#000000">false</font></span><span class="operator"><font color="#663300">);</font></span></strong>
<font color="#000000">            Application</font><span class="operator"><strong><font color="#663300">.</font></strong></span><font color="#000000">Run</font><span class="operator"><strong><font color="#663300">(</font></strong></span><span class="keyword">new</span><font color="#000000"> MainForm</font></font><font color="#663300"><span class="operator"><strong>());
        }</strong></span></font></span></pre>
</div>
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