一个类前面加了XmlRoot特性，序列化后的xml如何才能不带有任何命名空间

Question

在一个类前面加了[XmlRoot("test")]特性，序列化得到的xml的根节点是：<?xml version="1.0" encoding="utf-16"?>
<test xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">本想要的结果是：<?xml version=”1.0” encoding=”GBK”?>
<test>另：如何指定encoding为GBK

Answer 1

XmlSerializer xmls = new XmlSerializer(typeof(MetadataDatabase));
            
            TextWriter tw = new StreamWriter(@"d:\list.xml");
            //xmls.Serialize(tw, mddb);
            XmlSerializerNamespaces xmlns = new XmlSerializerNamespaces();
            xmlns.Add(string.Empty, string.Empty);
            xmls.Serialize(tw, mddb, xmlns);
            tw.Close();

Answer 2

我上次做了个序列化的，代码是这样的
public static void WriteXML(object obj, string strPath)
        {
            TextWriter writer = null;
            try
            {
                // 直接序列化生成xml
                //XmlSerializerNamespaces xmlns = new XmlSerializerNamespaces();
                //xmlns.Add(string.Empty, string.Empty);
                XmlSerializer serializer = new XmlSerializer(obj.GetType(),"");
                writer = new StreamWriter(strPath);                serializer.Serialize(writer, obj);
            }
            catch (Exception err)
            {
                if (writer != null)
                    writer.Close();
                throw err;
            }
            finally
            {
                writer.Close();
            }
        }但是导出的XML结构是这样的
<?xml version="1.0" encoding="utf-8"?>
<QueryListTables xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <listTableObj>
    <TableObject>
      <tableName>sys_querylist</tableName>
      <dtField>
        <xs:schema id="NewDataSet" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
          <xs:element name="NewDataSet" msdata:IsDataSet="true" msdata:MainDataTable="Table" msdata:UseCurrentLocale="true">
            <xs:complexType>
              <xs:choice minOccurs="0" maxOccurs="unbounded">
                <xs:element name="Table">
                  <xs:complexType>
                    <xs:sequence>
                      <xs:element name="COLUMN_NAME" type="xs:string" minOccurs="0" />
                      <xs:element name="DATA_TYPE" type="xs:string" minOccurs="0" />
                    </xs:sequence>
                  </xs:complexType>
                </xs:element>
              </xs:choice>
            </xs:complexType>
          </xs:element>
        </xs:schema>
        <diffgr:diffgram xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1">
          <NewDataSet>
            <Table diffgr:id="Table1" msdata:rowOrder="0">
              <COLUMN_NAME>F_ID</COLUMN_NAME>
              <DATA_TYPE>NUMBER</DATA_TYPE>
            </Table>
            <Table diffgr:id="Table2" msdata:rowOrder="1">
              <COLUMN_NAME>F_REPORTID</COLUMN_NAME>
              <DATA_TYPE>NUMBER</DATA_TYPE>
            </Table>
            <Table diffgr:id="Table3" msdata:rowOrder="2">
              <COLUMN_NAME>F_QUERYID</COLUMN_NAME>
              <DATA_TYPE>NUMBER</DATA_TYPE>
            </Table>
            <Table diffgr:id="Table4" msdata:rowOrder="3">
              <COLUMN_NAME>F_TITLE</COLUMN_NAME>
              <DATA_TYPE>NVARCHAR2</DATA_TYPE>
            </Table>
            <Table diffgr:id="Table5" msdata:rowOrder="4">
              <COLUMN_NAME>F_SKINESTYPE</COLUMN_NAME>
              <DATA_TYPE>NVARCHAR2</DATA_TYPE>
            </Table>还是有命名空间啊