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17.1.3 使用文化
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17.1.3 使用文化
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<div style='float:left;width:49%'>·<a href='100165487.htm'>17.1 System.Globalization命名空间</a></div><div style='float:right;width:49%'>·<a href='100165488.htm'>17.1.1 Unicode问题</a></div><div style='float:left;width:49%'>·<a href='100165489.htm'>17.1.2 文化和区域</a></div><div style='float:right;width:49%'>·<a href='100165491.htm'>17.1.4 排序</a></div><div style='float:left;width:49%'>·<a href='100165492.htm'>17.2 资源</a></div><div style='float:right;width:49%'>·<a href='100165493.htm'>17.2.1 创建资源文件</a></div></div>
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<div id="text"> <link href="css.css" rel="stylesheet" type="text/css" /><h3 style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 0cm; MARGIN-RIGHT: 0cm; FTEL: 8.15pt"><span lang="EN-US">17.1.3 </span><span style="FONT-FAMILY: 黑体">使用文化</span></h3>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">为了全面介绍文化，下面使用一个</span><span lang="EN-US">Windows</span><span style="FONT-FAMILY: 宋体">窗体应用程序示例，列出所有的文化，描述文化属性的不同特性。图</span><span lang="EN-US">17-6</span><span style="FONT-FAMILY: 宋体">显示了该应用程序在</span><span lang="EN-US">Visual Studio .NET</span><span style="FONT-FAMILY: 宋体">窗体设计器中的用户界面。</span></p>
<p align="center"><span lang="EN-US"><img height="275" src="17/image006.jpg" width="275" alt="" /></span></p>
<p style="FTEL: 8.15pt" align="center"><span style="FONT-FAMILY: 宋体">图</span><span lang="EN-US"> 17-6</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">下面讨论代码。在应用程序的初始化阶段，所有可用的文化都被添加到应用程序左边的树形视图控件中。这个初始化阶段在</span><span lang="EN-US">AddCulturesToTree()</span><span style="FONT-FAMILY: 宋体">方法中进行，这个方法在窗体类</span><span lang="EN-US">CultureDemoForm</span><span style="FONT-FAMILY: 宋体">的构造函数中调用：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">public CultureDemoForm()</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">{</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> //</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> //Required for Windows Form Designer support</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> //</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> InitializeComponent();</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> AddCulturesToTree();</span></p>
<p class="2" style="MARGIN-TOP: 0cm; BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">}</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">在方法</span><span lang="EN-US">AddCulturesToTree()</span><span style="FONT-FAMILY: 宋体">中，将通过静态方法</span><span lang="EN-US">CultureInfo.GetCultures()</span><span style="FONT-FAMILY: 宋体">获取所有的文化。给这个方法传送</span><span lang="EN-US">CultureTypes.AllCultures</span><span style="FONT-FAMILY: 宋体">，就会返回所有可用文化的数组。在</span><span lang="EN-US">foreach</span><span style="FONT-FAMILY: 宋体">循环中，把每个文件添加到树形视图中。为每个文化创建一个</span><span lang="EN-US">TreeNode</span><span style="FONT-FAMILY: 宋体">对象，因为</span><span lang="EN-US">TreeView</span><span style="FONT-FAMILY: 宋体">类使用</span><span lang="EN-US">TreeNode</span><span style="FONT-FAMILY: 宋体">对象来显示。将</span><span lang="EN-US">TreeNode</span><span style="FONT-FAMILY: 宋体">对象的</span><span lang="EN-US">Tag</span><span style="FONT-FAMILY: 宋体">属性设置为</span><span lang="EN-US">CultureInfo</span><span style="FONT-FAMILY: 宋体">对象，以便以后访问这个树型视图中的</span><span lang="EN-US">CultureInfo</span><span style="FONT-FAMILY: 宋体">对象。</span></p>
<p class="MsoNormal"><span lang="EN-US">TreeNode</span><span style="FONT-FAMILY: 宋体">对象添加到树中的什么地方取决于文化类型。如果文化是中立的或不变的，它就会添加到树的根节点上。表示特定文化的</span><span lang="EN-US">TreeNode</span><span style="FONT-FAMILY: 宋体">会添加到其父中立文化节点中。</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">//add all cultures to the tree view</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">public void AddCulturesToTree()</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">{</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> //get all cultures</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> CultureInfo[] cultures =</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> CultureInfo.GetCultures(CultureTypes.AllCultures);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> TreeNode[] nodes = new TreeNode[cultures.Length];</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> int i = 0;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> TreeNode parent = null;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 23.05pt"><span lang="EN-US"> foreach (CultureInfo ci in cultures)</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 23.05pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> nodes[i] = new TreeNode();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> nodes[i].Text = ci.DisplayName;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> nodes[i].Tag = ci;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> if (ci.IsNeutralCulture)</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> //remember neutral cultures as parent of following cultures</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> parent = nodes[i];</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> treeCultures.Nodes.Add(nodes[i]);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> else if (ci.ThreeLetterISOLanguageName == </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> CultureInfo.InvariantCulture. ThreeLetterISOLanguageName)</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> // invariant culture don't have a parent</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> treeCultures.Nodes.Add(nodes[i]);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> else</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> // specific cultures are added to the neutral parent</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> parent.Nodes.Add(nodes[i]);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> i++;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="2" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">}</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">在用户选择树中的一个节点时，就会调用</span><span lang="EN-US">TreeView</span><span style="FONT-FAMILY: 宋体">的</span><span lang="EN-US">AfterSelect</span><span style="FONT-FAMILY: 宋体">事件处理程序。在这里，这个处理程序在</span><span lang="EN-US">OnSelectCulture()</span><span style="FONT-FAMILY: 宋体">方法中执行。在这个方法中，先调用方法</span><span lang="EN-US">ClearTextFields()</span><span style="FONT-FAMILY: 宋体">清除所有的字段，再选择</span><span lang="EN-US">TreeNode</span><span style="FONT-FAMILY: 宋体">对象的</span><span lang="EN-US">Tag</span><span style="FONT-FAMILY: 宋体">属性，从树中获取</span><span lang="EN-US">CultureInfo</span><span style="FONT-FAMILY: 宋体">对象。接着使用</span><span lang="EN-US">CultureInfo</span><span style="FONT-FAMILY: 宋体">对象的属性</span><span lang="EN-US">Name</span><span style="FONT-FAMILY: 宋体">、</span><span lang="EN-US">NativeName</span><span style="FONT-FAMILY: 宋体">和</span><span lang="EN-US">EnglishName</span><span style="FONT-FAMILY: 宋体">设置一些文本字段。如果</span><span lang="EN-US">CultureInfo</span><span style="FONT-FAMILY: 宋体">是一个可以使用</span><span lang="EN-US">IsNeutralCulture</span><span style="FONT-FAMILY: 宋体">属性进行查询的中立文化，就设置相应的复选框。</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">private void OnSelectCulture(object sender, </span></p>
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