如何在C＃中从IDataReader写入xml文件

Question

If I have an IDataReader, how would i go about constructing a xml writer to output to xml. Would It require a custom stream or writer? I'm trying to write to an xml file but I have access to an IDataReader.

Answer 1

One approach would be to build a class that mimics the data in the IDataReader and simply serialize it to XML. Let's say the data in the data reader was Field1, Field2, Field3 , the class would look like this:

public class Data
{
    public string Field1;
    public string Field2;
    public string Field3;
}

Of course the data types could differ. Now, all we need to do is read the data into the class, that might look something like this:

var list = new List<Data>();
while (reader.Read())
{
    var o = new Data();
    o.Field1 = reader["Field1"];
    o.Field2 = reader["Field2"];
    o.Field3 = reader["Field3"];
    list.Add(o);
}

var serializer = new XmlSerializer(typeof(List<Data>));

using (TextWriter textWriter = new StreamWriter(fileName))
{
    serializer.Serialize(textWriter, list);
}