从XElement中读取特定元素

本文关键字:元素 读取 XElement | 更新日期: 2023-09-27 18:10:44

我想使用c#将sharepoint列表的选择列中的multiecheckbox项绑定到asp.net checkboxlisttitem。我正在使用XELEMENT检索List的信息:

XElement listStructure;
listStructure = proxy.GetList("WebsiteSubscriber");
<Field Type="MultiChoice" DisplayName="Area" Required="FALSE" EnforceUniqueValues="FALSE" Indexed="FALSE" FillInChoice="FALSE" ID="{16cc1615-a490-44de-a870-c7ebe603e2cc}" SourceID="{2c8a80ea-38c5-48f7-9d7d-400d445a5e64}" StaticName="Area" Name="Area" ColName="ntext2" RowOrdinal="0">
  <Default>Articles</Default>
  <CHOICES>
    <CHOICE>Articles</CHOICE>
    <CHOICE>Websites</CHOICE>
    <CHOICE>Books</CHOICE>
  </CHOICES>
</Field>

我想从这个XML中读取选择。并且只获取"文章,网站,书籍"的值

注意:这个XML可能包含许多章节与<choices>我想通过<fieldType>或DisplayName="Area"属性来获取它,并在c#中获得值。

从XElement中读取特定元素

var xml = @"<Field Type=""MultiChoice"" DisplayName=""Area"" Required=""FALSE"" EnforceUniqueValues=""FALSE"" Indexed=""FALSE"" FillInChoice=""FALSE"" ID=""{16cc1615-a490-44de-a870-c7ebe603e2cc}"" SourceID=""{2c8a80ea-38c5-48f7-9d7d-400d445a5e64}"" StaticName=""Area"" Name=""Area"" ColName=""ntext2"" RowOrdinal=""0"">
  <Default>Articles</Default>
  <CHOICES>
    <CHOICE>Articles</CHOICE>
    <CHOICE>Websites</CHOICE>
    <CHOICE>Books</CHOICE>
  </CHOICES>
</Field>";
var doc = XDocument.Parse(xml);
XElement element = 
         doc.Descendants("Field")
            .First(field => (string)field.Attribute("DisplayName") == "Area");

string[] result = 
         element.Descendants("CHOICE")
                .Select(v => (string)v)
                .ToArray();

Console.WriteLine(string.Join(Environment.NewLine, result));

打印:

Articles
Websites
Books

试试这个:

var temp = 
    listStructure.Descendants("Field")
                 .Where(i => i.Attribute("DisplayName").Value == "Area")
                             .Select(i => i.Descendants("CHOICE") 
                                          .Select(j => j.Value)).ToList();
List<string> result = new List<string>();
foreach (IEnumerable<string> item in temp)
{
    result.AddRange(item);
}
//result: Articles; Websites; Books