xml到linq查询，其中字母以Windows Phone中的a开头

Question

我正在尝试获取数据，其中所有单词以A开头并使用xml将其显示在列表框中，但是我在这里无法获得的Startwith属性是我想要获取的代码

XDocument loadedCustomData = XDocument.Load("accounts.xml");
            var filteredData =
               from c in loadedCustomData.Descendants("record")

               where  (string)c.Element("main") == "Above the Line"
                // i want here something like
                //where (string)c.element("main").startwith ==a
                //so how to ACHIEVE THIS????
               select new words()
               {

                   PON = "Post Office: " + (string)c.Element("main"),
                   PIN = "Pincode (Postal Code): " + (string)c.Element("def"),

               };
            listBox1.ItemsSource = filteredData;

这是XML格式

 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    <data-set xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<record>
      <main>Above the Line</main>
        <def>Above the line items are those revenue and expense items that directly affect          
</record>

如何实现查询以字母A开头

Answer 1

试试这个：

    XDocument loadedCustomData = XDocument.Load("accounts.xml");
    var filteredData =
       from c in loadedCustomData.Descendants("record")
       where ((string)c.Element("main")).StartsWith("A")
       select new words()
       {

           PON = "Post Office: " + (string)c.Element("main"),
           PIN = "Pincode (Postal Code): " + (string)c.Element("def"),

       };
    listBox1.ItemsSource = filteredData;