如何在c#中删除csproj文件中的节点？

我想删除节点

以编程方式从csproj文件。 我的csproj文件结构如下：

<ItemGroup>
    <Reference Include="Microsoft.CSharp" />
    <Reference Include="System.Data.OracleClient" />
    <Reference Include="System.Messaging" />
    <Reference Include="System.Web.DynamicData" />
    <Reference Include="System.Web.Entity" />
    <Reference Include="System.Web.ApplicationServices" />
    <Reference Include="System.ComponentModel.DataAnnotations" />
    <Reference Include="System" />
    <Reference Include="System.Data" />
    <Reference Include="System.Core" />
    <Reference Include="System.Data.DataSetExtensions" />
    <Reference Include="System.Web.Extensions" />
    <Reference Include="System.Xml.Linq" />
    <Reference Include="System.Drawing" />
    <Reference Include="System.Web" />
    <Reference Include="System.Xml" />
    <Reference Include="System.Configuration" />
    <Reference Include="System.Web.Services" />
    <Reference Include="System.EnterpriseServices" />
  </ItemGroup>

---

当您选择一个SelectNodes或SingleSelectNodes时，不返回任何内容，这意味着您的查询是错误的。在本例中，.csproj中的元素属于一个名称空间（这里声明为“默认”名称空间-没有前缀）

注意前缀“p”可以是任何名称，它只允许您在XPATH表达式中指定相应的名称空间，但您需要它，即使在原始文档中它被声明为默认名称空间。

Easy with XML Linq

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string input =
                "<Root>" +
                    "<ItemGroup>" +
                        "<Reference Include=\"Microsoft.CSharp\" />" +
                        "<Reference Include=\"System.Data.OracleClient\" />" +
                        "<Reference Include=\"System.Messaging\" />" +
                        "<Reference Include=\"System.Web.DynamicData\" />" +
                        "<Reference Include=\"System.Web.Entity\" />" +
                        "<Reference Include=\"System.Web.ApplicationServices\" />" +
                        "<Reference Include=\"System.ComponentModel.DataAnnotations\" />" +
                        "<Reference Include=\"System\" />" +
                        "<Reference Include=\"System.Data\" />" +
                        "<Reference Include=\"System.Core\" />" +
                        "<Reference Include=\"System.Data.DataSetExtensions\" />" +
                        "<Reference Include=\"System.Web.Extensions\" />" +
                        "<Reference Include=\"System.Xml.Linq\" />" +
                        "<Reference Include=\"System.Drawing\" />" +
                        "<Reference Include=\"System.Web\" />" +
                        "<Reference Include=\"System.Xml\" />" +
                        "<Reference Include=\"System.Configuration\" />" +
                        "<Reference Include=\"System.Web.Services\" />" +
                        "<Reference Include=\"System.EnterpriseServices\" />" +
                      "</ItemGroup>" +
                  "</Root>";

            XDocument doc = XDocument.Parse(input);
            List<XElement> itemGroup = doc.Descendants("ItemGroup").ToList();

            itemGroup.Elements("Reference").Where(x => x.Attribute("Include").Value == "System.Data").Remove();
        }
    }
}
​

使用系统；
使用System.Collections.Generic；
使用System.Linq；
使用系统文本；
使用System.Xml；
使用System.Xml.Linq；
命名空间控制台应用程序1
{
班级计划
{
静态void Main（字符串[]参数）
{
字符串输入=
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
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"";
XDocument doc=XDocument.Parse（输入）；
List itemGroup=doc.substands（“itemGroup”）.ToList（）；
itemGroup.Elements（“Reference”）.Where（x=>x.Attribute（“Include”）.Value==“System.Data”）.Remove（）；
}
}
}
​

“它不工作”永远都是不够的信息。当你尝试时会发生什么？（我怀疑问题在于您忽略了元素的名称空间，这是根元素的

xmlns=…

部分默认的名称空间。我还建议使用LINQ to XML作为通常更好的API，但这是另一回事。）您应该使用XmlNamespaceManager。乔恩·斯基特被发现了！他才1岁！！

<Project ... xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
...
</Project>

XmlDocument doc = new XmlDocument();
XmlNamespaceManager nsmgr = new XmlNamespaceManager(new NameTable());
nsmgr.AddNamespace("p", "http://schemas.microsoft.com/developer/msbuild/2003");
doc.Load(fullFilePath);
XmlNode node = doc.SelectSingleNode(@"/p:Project/p:ItemGroup/p:Reference[@Include='System.Data']", nsmgr);

node.ParentNode.RemoveChild(node);

doc.Save(fullFilePath);

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string input =
                "<Root>" +
                    "<ItemGroup>" +
                        "<Reference Include=\"Microsoft.CSharp\" />" +
                        "<Reference Include=\"System.Data.OracleClient\" />" +
                        "<Reference Include=\"System.Messaging\" />" +
                        "<Reference Include=\"System.Web.DynamicData\" />" +
                        "<Reference Include=\"System.Web.Entity\" />" +
                        "<Reference Include=\"System.Web.ApplicationServices\" />" +
                        "<Reference Include=\"System.ComponentModel.DataAnnotations\" />" +
                        "<Reference Include=\"System\" />" +
                        "<Reference Include=\"System.Data\" />" +
                        "<Reference Include=\"System.Core\" />" +
                        "<Reference Include=\"System.Data.DataSetExtensions\" />" +
                        "<Reference Include=\"System.Web.Extensions\" />" +
                        "<Reference Include=\"System.Xml.Linq\" />" +
                        "<Reference Include=\"System.Drawing\" />" +
                        "<Reference Include=\"System.Web\" />" +
                        "<Reference Include=\"System.Xml\" />" +
                        "<Reference Include=\"System.Configuration\" />" +
                        "<Reference Include=\"System.Web.Services\" />" +
                        "<Reference Include=\"System.EnterpriseServices\" />" +
                      "</ItemGroup>" +
                  "</Root>";

            XDocument doc = XDocument.Parse(input);
            List<XElement> itemGroup = doc.Descendants("ItemGroup").ToList();

            itemGroup.Elements("Reference").Where(x => x.Attribute("Include").Value == "System.Data").Remove();
        }
    }
}
​