我试图找出如何我可以去更新我的XML文件。我知道如何读，写，但不知道如何更新现有的记录。

I'm trying to figure out how I can go about updating my XML file. I know how to read and write, but no idea how to update an existing record.

我的XML文件是这样的：

My XML file looks like:

和我希望能够改变一个XAttribute这是已经在文件中的值。

And I'd like to be able to change the value of an XAttribute that's already in the file.

这就是我正在写文件：

        XElement xElement;
        xElement = new XElement("Orders");

        XElement element = new XElement(
            "Order",
            new XAttribute("Quantity", Quantity),
            new XAttribute("Part No", PartNo),
            new XAttribute("Description", Description),
            new XAttribute("Discount", Discount),
            new XAttribute("Freight", Freight),
            new XAttribute("Unit Value", UnitValue),
            new XAttribute("Line Total", LineTotal)
            );
        xElement.Add(element);
        xElement.Save("");

是否有可能做更新，或者必须首先删除现有的一个，然后用新值重新添加？

Is it possible to do updates, or must we first remove the existing one, and then re-add it with the new values?

推荐答案

是的，你可以更新的属性，而不删除并重新添加。简单地获得所需的 XAttribute 对象的XElement内更新它的值属性和的XElement保存回一个文件，看变化

Yes you can update the attribute without deleting and re-adding. Simply get the desired XAttribute object inside the XElement and update it's Value property and save back the XElement to a file to see the changes.

xElement.Attribute("Quantity").Value = "15";