如何在 C# 中更新 XML 文档的特定子节点值

Question

I have a method like below where I am getting all the parameter value from another method, where

    type = DeviceParameters
    sourceXml = <?xml version="1.0" encoding="utf-16"?>
            <ProductCode>
              <DeviceParameters>
                <P65>True</P65>
                <HWVersion>1</HWVersion>
                <Test>Test</Test>
                <Test>hello</Test>
              </DeviceParameters>
              <FirmwareGates>
                <Firmware>120.0.23</Firmware>
              </FirmwareGates>
              <ModemIncludeList>
                <Modem>Test</Modem>
                <ModemFirmware>2</ModemFirmware>
              </ModemIncludeList>
            </ProductCode>
    oldParameterName= Test
    oldParameterValue= hello
    newParameterName = Test
    parameterValue = hello123

I am trying to update the value for the node <Test>hello</Test> to <Test>hello123</Test>

EDIT: I have tried to Removed the parameter and readd with the new value but it seems like more difficult. Is there any way to update the value?

private string EditParameter(TesterParameterCodeType type, string sourceXml, string oldParameterName, string oldParameterValue, string newParameterName, string parameterValue, int index)
            {
XDocument doc = XDocument.Parse(sourceXml); // or XDocument.Parse(string)
            doc.Root.Descendants().Where(e => e.Name == oldParameterName && e.Value == oldParameterValue).Remove();           

                var stringWriter = new StringWriter();
                doc.Save(stringWriter);
                return stringWriter.ToString();
        }

Answer 1

To make InnerText property available in auto complete just change your for using the correct type of your node variable

foreach (XmlElement node in parameterNode)

To remove the node in your if just select the parent of you node and remove the current node from the parent:

if(node.InnerText == parameterValue)
{
    var parentNode = node.ParentNode;
    parentNode.RemoveChild(node);
}

You can see an example of your full conde in this link:

https://dotnetfiddle.net/2Fe2ss