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22.2.1 简单的绑定
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C#高级编程（第3版）
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22.2.1 简单的绑定
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2006-10-13 14:41:00
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<div style='float:left;width:49%'>·<a href='100165622.htm'>22.1.2 数据源</a></div><div style='float:right;width:49%'>·<a href='100165623.htm'>22.1.3 DataGrid类的层次结构</a></div><div style='float:left;width:49%'>·<a href='100165624.htm'>22.2 数据绑定</a></div><div style='float:right;width:49%'>·<a href='100165626.htm'>22.2.2 数据绑定对象</a></div><div style='float:left;width:49%'>·<a href='100165627.htm'>22.3 Visual Studio .NET和数据访问</a></div><div style='float:right;width:49%'>·<a href='100165628.htm'>22.3.1 创建一个连接</a></div></div>
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<link href="css.css" rel="stylesheet" type="text/css" /><h3 style="MARGIN-TOP: 6.5pt; MARGIN-LEFT: 0cm; MARGIN-RIGHT: 0cm; FTEL: 6.5pt"><a ftel="_Toc507815184"><span lang="EN-US">22.2.1 </span></a><span style="FONT-FAMILY: 黑体">简单的绑定</span></h3>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">支持单一绑定的控件一般一次只显示一个值，例如文本框或单选按钮，下面的示例说明了如何把</span><span lang="EN-US">DataTable</span><span style="FONT-FAMILY: 宋体">中的一列绑定到</span><span lang="EN-US">TextBox</span><span style="FONT-FAMILY: 宋体">上：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">DataSet ds = CreateDataSet();</span></p>
<p class="2" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">textBox1.DataBindings.Add("Text", ds , "Products.ProductName");</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">用上面的方法</span><span class="codeintext-PRODUCTION"><span lang="EN-US" style="FONT-FAMILY: 'Times New Roman'">CreateDataSet()</span></span><span style="FONT-FAMILY: 宋体">从</span><span lang="EN-US">Products</span><span style="FONT-FAMILY: 宋体">表中检索一些数据，并保存到返回的</span><span lang="EN-US">DataSet</span><span style="FONT-FAMILY: 宋体">中，之后，第二行代码把控件</span><span lang="EN-US">(textBox1)</span><span style="FONT-FAMILY: 宋体">的</span><span lang="EN-US">Text</span><span style="FONT-FAMILY: 宋体">属性绑定到</span><span lang="EN-US">Products.ProductName</span><span style="FONT-FAMILY: 宋体">列上。图</span><span lang="EN-US">22-12</span><span style="FONT-FAMILY: 宋体">显示了这种数据绑定的结果。</span></p>
<p align="center"><span lang="EN-US"><img height="50" src="22/image012.jpg" width="320" alt="" /></span></p>
<p style="FTEL: 8.15pt" align="center"><span style="FONT-FAMILY: 宋体">图</span><span lang="EN-US"> 22-12</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">文本框显示了数据库中的一个字符串，要检查这个数据是否放在正确的列上，并有正确的值，可以使用</span><span lang="EN-US">SQL Server Query Analyze</span><span style="FONT-FAMILY: 宋体">工具，验证</span><span lang="EN-US">Products</span><span style="FONT-FAMILY: 宋体">表中的内容，如图</span><span lang="EN-US">22-13</span><span style="FONT-FAMILY: 宋体">所示。</span></p>
<p style="MARGIN-TOP: 4.9pt" align="center"><span lang="EN-US"><img height="152" src="22/image013.jpg" width="269" alt="" /></span></p>
<p style="FTEL: 8.15pt" align="center"><span style="FONT-FAMILY: 宋体">图</span><span lang="EN-US"> 22-13</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">屏幕上有一个文本框，既不能滚动到下一个或上一个记录上，也不能更新数据库，因此下一节介绍一个更真实的示例，说明如何使用其他对象绑定数据。</span></p></div>
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<div style='float:left;width:49%'>·<a href='100165622.htm'>22.1.2 数据源</a></div><div style='float:right;width:49%'>·<a href='100165623.htm'>22.1.3 DataGrid类的层次结构</a></div><div style='float:left;width:49%'>·<a href='100165624.htm'>22.2 数据绑定</a></div><div style='float:right;width:49%'>·<a href='100165626.htm'>22.2.2 数据绑定对象</a></div><div style='float:left;width:49%'>·<a href='100165627.htm'>22.3 Visual Studio .NET和数据访问</a></div><div style='float:right;width:49%'>·<a href='100165628.htm'>22.3.1 创建一个连接</a></div></div>
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