ado.net 从入门到精通（二）DataTable与xml

把datatable保存为xml，再读取xml转化为datatable

           DataTable dt = new DataTable("dt", "http://baidu.com");

            dt.Prefix = "xs";//前缀

            dt.Columns.Add("id");

            dt.Columns.Add("name");

DataRow dr = dt.NewRow();

            dr["id"] = "123";

            dr["Name"] = "xs";

            dt.Rows.Add(dr);
DataRow dr1 = dt.NewRow();

            dr1["id"] = "456";

            dr1["Name"] = "xsdc";

            dt.Rows.Add(dr1);

            //dt.WriteXml("C:\\2.xml");//此方法保存的xml只是datatable,读取时会失败

            dt.WriteXml("C:\\1.xml", XmlWriteMode.WriteSchema);//会在xnl中自动生成新的dataset
DataTable dt1 = new DataTable("dt");
dt1.ReadXml(@"C:\\1.xml");

1.xml

<?xml version="1.0" standalone="yes"?>

<NewDataSet xmlns="http://baidu.com">

  <xs:schema id="NewDataSet" targetNamespace="http://baidu.com" xmlns:mstns="http://baidu.com" xmlns="http://baidu.com" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" attributeFormDefault="qualified" elementFormDefault="qualified">

    <xs:element name="NewDataSet" msdata:IsDataSet="true" msdata:MainDataTable="http_x003A__x002F__x002F_baidu.com_x003A_dt" msdata:UseCurrentLocale="true">

      <xs:complexType>

        <xs:choice minOccurs="0" maxOccurs="unbounded">

          <xs:element name="dt" msdata:Prefix="xs">

            <xs:complexType>

              <xs:sequence>

                <xs:element name="id" type="xs:string" minOccurs="0" />

                <xs:element name="name" type="xs:string" minOccurs="0" />

              </xs:sequence>

            </xs:complexType>

          </xs:element>

        </xs:choice>

      </xs:complexType>

    </xs:element>

  </xs:schema>

  <xs:dt xmlns:xs="http://baidu.com">

    <id>123</id>

    <name>xs</name>

  </xs:dt>

  <xs:dt xmlns:xs="http://baidu.com">

    <id>456</id>

    <name>xsdc</name>

  </xs:dt>

</NewDataSet>

2.xml

<?xml version="1.0" standalone="yes"?>

<xs:DocumentElement xmlns:xs="http://baidu.com">

  <xs:dt>

    <id xmlns="http://baidu.com">123</id>

    <name xmlns="http://baidu.com">xs</name>

  </xs:dt>

  <xs:dt>

    <id xmlns="http://baidu.com">456</id>

    <name xmlns="http://baidu.com">xsdc</name>

  </xs:dt>

</xs:DocumentElement>