使用Linq删除XML文档的部分
本文关键字:文档 XML Linq 删除 使用 | 更新日期: 2023-09-27 18:11:18
我如何使用Linq删除所有的部分,其中他们的元素包含参数{}?在我的例子中,我想删除部分{SecName1}
源文档:<ReceiptLayoutMaintenanceRequest>
<ReceiptLayoutName>Test Layout1</ReceiptLayoutName>
<ActionName>Add</ActionName>
<ReceiptLayoutForMaintenance>
<Name>Test Layout1</Name>
<Description>ReciptDesc</Description>
<PrinterName>Emulator - Receipt</PrinterName>
<ReceiptLayout>
<Name>AAA</Name>
<Description>$</Description>
<TemplateName>DefaultTemplate</TemplateName>
<LayoutParameters />
</ReceiptLayout>
<ReceiptLayout>
<Name>{SecName1}</Name>
<Description>$</Description>
<TemplateName>DefaultTemplate</TemplateName>
<LayoutParameters />
</ReceiptLayout>
</ReceiptLayoutForMaintenance>
</ReceiptLayoutMaintenanceRequest>
想要输出
<ReceiptLayoutMaintenanceRequest>
<ReceiptLayoutName>Test Layout1</ReceiptLayoutName>
<ActionName>Add</ActionName>
<ReceiptLayoutForMaintenance>
<Name>AAA</Name>
<Description>ReciptDesc</Description>
<PrinterName>Emulator - Receipt</PrinterName>
<ReceiptLayout>
<Name>AAA</Name>
<Description>$</Description>
<TemplateName>DefaultTemplate</TemplateName>
<LayoutParameters />
</ReceiptLayout>
</ReceiptLayoutForMaintenance>
谢谢
这将删除任何具有以括号开始和结束的子Name
的ReceiptLayout
节点,并产生您想要的输出:
XDocument doc = XDocument.Load(@"test.xml"); //load xml
var nodesToRemove = doc.Descendants("ReceiptLayout")
.Where(x => x.Element("Name").Value.StartsWith("{")
&& x.Element("Name").Value.EndsWith("}"))
.ToList();
foreach (var node in nodesToRemove)
node.Remove();
这可以缩短为一个Linq语句,但我个人更喜欢保持Linq查询和修改(删除)分开:
doc.Descendants("ReceiptLayout")
.Where(x => x.Element("Name").Value.StartsWith("{")
&& x.Element("Name").Value.EndsWith("}"))
.Remove();
var doc = XDocument.Parse(xml);
doc.Descendants()
.Where(n => !n.HasElements && Regex.IsMatch(n.Value, "[{].*?[}]"))
.Select(n=>n.Parent) // because you want to remove the section not the node
.Remove();
xml = doc.ToString();
使用let
关键字的BrokenGlass代码的变体
var doc = XDocument.Load(@"test.xml");
var list = from p in doc.Descendants("ReceiptLayout")
let q = p.Element("Name")
let r = q != null ? q.Value : string.Empty
where r.StartsWith("{") && r.EndsWith("}")
select p;
list.Remove();
这是"过早优化":-)我"缓存"p.Element("Name").Value
。啊…我检查是否真的有一个Name
元素,这样一切都不会崩溃,如果没有一个:-)