C# 通过属性从XML中删除重复项

正在尝试删除

任何内容…

如果出现超过1次，则只保留一次

我已经用***包围了我想删除的项目。。 我使用的代码以前工作过，但后来我添加了

。Value==“发货”

现在它失败了。 如何保持此代码并仅修复

.Value==“装运”

以使其正常工作

 class Program
    {
        static void Main(string[] args)
        {
            string renderedOutput =
                    "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
                     "<RootDTO xmlns:json='http://james.newtonking.com/projects/json'>" +
                       "<destination>" +
                          "<name>xxx</name>" +
                       "</destination>" +
                       "<orderData>" +
                          "<items json:Array='true'>" +
                                "<shipmentIndex Name=\"items\" >111</shipmentIndex>" +
                                "<barcode>12345</barcode>" +
                          "</items>" +
                           "<items json:Array='true'>" +
                                "<shipmentIndex Name=\"items\">222</shipmentIndex>" +
                                "<barcode>12345</barcode>" +
                          "</items>" +
                           "<items json:Array='true'>" +
                                "<shipmentIndex Name=\"items\">222</shipmentIndex>" +
                                "<barcode>12345</barcode>" +
                          "</items>" +


                          "<misCode>9876543210</misCode>" +
                              "<shipments>" +
                                    "<sourceShipmentId></sourceShipmentId>" +
                                    "<shipmentIndex shipments=\"shipments\">111</shipmentIndex>" +
                              "</shipments>" +
                              "<shipments>" +
                                    "<sourceShipmentId></sourceShipmentId>" +
                                    "<shipmentIndex Name=\"shipments\">222</shipmentIndex>" +
****
                                    "<shipmentIndex Name=\"shipments\">222</shipmentIndex>" +
****
                              "</shipments>" +
                       "</orderData>" +
                      "</RootDTO>";


            var xml = XElement.Parse(renderedOutput);    

            xml.Element("orderData").Descendants("shipments")
                    .SelectMany(s => s.Elements("shipmentIndex")
                    .GroupBy(g => g.Attribute("Name").Value == "shipments")
                    .SelectMany(m => m.Skip(1))).Remove();
        }
    }

类程序
{
静态void Main（字符串[]参数）
{
字符串渲染输出=
"" +
"" +
"" +
“xxx”+
"" +
"" +
"" +
"111" +
"12345" +
"" +
"" +
"222" +
"12345" +
"" +
"" +
"222" +
"12345" +
"" +
"9876543210" +
"" +
"" +
"111" +
"" +
"" +
"" +
"222" +
****
"222" +
****
"" +
"" +
"";
var xml=XElement.Parse（renderOutput）；
xml.Element（“orderData”）.子体（“装运”）
.SelectMany（s=>s.Elements（“shipmentIndex”）
.GroupBy（g=>g.Attribute（“名称”）.Value==“装运”）
.SelectMany（m=>m.Skip（1））.Remove（）；
}
}

我不确定我是否100%理解了这个问题，但下面是：

我认为您希望过滤结果，以便只包含name属性等于'shippings'的元素，尽管并非所有shipmentIndex元素都具有'name'属性，因此您可能会得到一个null引用异常。您需要添加检查以确保“Name”属性存在

xml.Element("orderData").Descendants("shipments")
               .SelectMany(s => s.Elements("shipmentIndex")
               .GroupBy(g => g.Attribute("Name") != null && g.Attribute("Name").Value == "shipments")
               .SelectMany(m => m.Skip(1))).Remove();

---

如果要从RenderOutput字符串中删除重复项：

Match match = Regex.Match(renderedOutput, "<shipmentIndex Name=\"shipments\">([^<]*)</shipmentIndex>");

int index = renderedOutput.IndexOf(match.ToString());
renderedOutput = renderedOutput.Remove(index, match.ToString().Length);

---

Match Match=Regex.Match（renderoutput），（[^i只想从
子体（“装运”）中删除此项。