如何向c#中从Writexml数据生成的XML添加额外信息?

ds.WriteXml(strXmlTestCasePath, XmlWriteMode.IgnoreSchema);

ds is a dataset. I want to add an extra line or extra information into this XML. How do I do it?

ds是一个数据集。我想在这个XML中添加额外的行或额外的信息。我该怎么做呢?

2 个解决方案

#1

You can't simply write more XML to the end of a serialized DataSet, since if you do you'll be producing an XML document with more than one top-level element. Using an XmlWriter, you'd need to do something like this:

不能简单地将更多的XML写到序列化数据集的末尾，因为如果这样做，您将生成一个包含多个*元素的XML文档。使用XmlWriter，您需要做以下事情:

using (XmlWriter xw = XmlWriter.Create(strXmlTestCasePath));
{
   xw.WriteStartElement("container");
   ds.WriteXml(xw, XmlWriteMode.IgnoreSchema);
   // from here on, you can use the XmlWriter to add XML to the end; you then
   // have to wrap things up by closing the enclosing "container" element:
   ...
   xw.WriteEndElement();
}

But this won't help you if what you're trying to do is add XML elements inside the serialized DataSet. To do that, you'll need to serialize the DataSet, read it into an XmlDocument, and then use DOM methods to manipulate the XML.

但是，如果您要做的是在序列化的数据集中添加XML元素，那么这对您没有帮助。为此，需要序列化数据集，将其读入XmlDocument，然后使用DOM方法操作XML。

Or, alternatively, create and populate a new DataTable right before you serialize the DataSet and then delete it when you're done. It really depends on what your actual requirements are.

或者，在序列化数据集之前创建并填充一个新的数据表，然后在完成之后删除它。这取决于你的实际需求是什么。

#2

Use an XmlWriter to write your DataSet. You can then use the same object to write additional XML.

使用XmlWriter来编写数据集。然后，您可以使用相同的对象来编写附加的XML。

illustrative code:

说明代码:

            System.Data.DataSet ds;
            System.Xml.XmlWriter x;
            ds.WriteXml(x);
            x.WriteElementString("test", "value");

#1