Delete and Edit the xml file nodes

Try this:

Hi

  ///

    ///
    ///

    /// xml file path
    /// root tagname
    /// Search Attribute Name
    /// Search Attribute Value

    private static void DeleteXmlNode(string path, string tagname, string searchconditionAttributename, string searchconditionAttributevalue)
    {
        XmlDocument doc = new XmlDocument();

        doc.Load(path);

        XmlNodeList nodes = doc.GetElementsByTagName(tagname);
        //XmlNodeList nodes = doc.GetElementsByTagName("user");

        foreach (XmlNode node in nodes)
        {
            foreach (XmlAttribute attribute in node.Attributes)
            {
                if ((attribute.Name == searchconditionAttributename) && (attribute.Value == searchconditionAttributevalue))
                //if ((attribute.Name == "name") && (attribute.Value == "aaa"))
                {
                    //delete.
                    node.RemoveAll();
                    break;
                }
            }
        }
        //save xml file.
        doc.Save(path);
    }

    ///

    ///
    ///

    /// xml file path
    /// root tagname
    /// Search Attribute Name
    /// Search Attribute Value
    /// Edit Attribute Name
    /// Edit Attribute Value
    private static void EditXmlNode(string path, string tagname, string searchconditionAttributename, string searchconditionAttributevalue, string editAttributename, string editAttributevalue)
    {

        XmlDocument doc = new XmlDocument();

        doc.Load(path);

        XmlNodeList nodes = doc.GetElementsByTagName(tagname);
        // XmlNodeList nodes = doc.GetElementsByTagName("user");

        foreach (XmlNode node in nodes)
        {
            bool newnode = true;

            //Check attribute eixt which we want to edit.

            bool isEdit = false;
            foreach (XmlAttribute attribute in node.Attributes)
            {
                //if ((attribute.Name == "name") && (attribute.Value == "ddd"))
                if ((attribute.Name == searchconditionAttributename) && (attribute.Value == searchconditionAttributevalue))
                {
                    isEdit = true;
                }

                if (isEdit)
                {
                    // if (attribute.Name == "expireson")
                    if (attribute.Name == editAttributename)
                    {
                        //attribute.Value = "2011-12-28";
                        attribute.Value = editAttributevalue;
                        break;
                    }
                }
            }
            newnode = false;
        }
        //save xml file.
        doc.Save(path);
    }