循环中的XML序列化程序

时间:2018-06-18 13:16:43

标签: c# xml winforms

我正在尝试将dataGridView中的数据序列化,然后将其放入类中,然后写入文件。但是,我遇到了一个问题,序列化程序会将每个对象放在它自己的“文件”中,而不是将所有对象放在一个文件中;当我打开.xml文件时,您可以看到:

<?xml version="1.0" encoding="utf-8"?>
  <MyClass xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <Id>1</Id>
    <Column1>XXX</Column1>
    <Column2>YYY</Column2>
  </MyClass>
<?xml version="1.0" encoding="utf-8"?>
  <MyClass xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <Id>2</Id>
    <Column1>ZZZ</Column1>
    <Column2>AAA</Column2>
  </MyClass>

这是我用来序列化的代码。我如何解决这个问题,以便当我打开.xml文件时,我只得到一个文件,而不是像上面那样拆分?我是否必须将所有对象添加到列表中,然后从列表中写入?

private void expXML_Click(object sender, EventArgs e)
    {
        XmlSerializer ser = new XmlSerializer(typeof(MyClass));
        TextWriter writer = new StreamWriter("Filename.XML");
        for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
        {
            MyClass abc = new MyClass(Convert.ToInt32(dataGridView1.Rows[i].Cells[0].Value), dataGridView1.Rows[i].Cells[1].Value.ToString(), dataGridView1.Rows[i].Cells[2].Value.ToString());
            ser.Serialize(writer, abc);
        }
        writer.Close();
    }

3 个答案:

答案 0 :(得分:1)

好吧,我按照建议和我自己的预感;这是经过编辑的代码,它正确地序列化了数据:

private void expXML_Click(object sender, EventArgs e)
{
    List<MyClass> newList = new List<MyClass>();
    XmlSerializer ser = new XmlSerializer(typeof(List<MyClass>));
    TextWriter writer = new StreamWriter("Filename.XML");
    for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
    {
        MyClass abc = new MyClass(Convert.ToInt32(dataGridView1.Rows[i].Cells[0].Value), dataGridView1.Rows[i].Cells[1].Value.ToString(), dataGridView1.Rows[i].Cells[2].Value.ToString());
        newList.add(abc);            
    }
    ser.Serialize(writer, newList);
    writer.Close();
}

答案 1 :(得分:1)

试试这个

private class MyClassList
{
   IEnumerable<MyClass> Root{  get;  set;}
}

private void expXML_Click(object sender, EventArgs e)
{
    var myClassList = new MyClassList();
    myClassList.Root = new List<MyClass>();

    XmlSerializer ser = new XmlSerializer(typeof(MyClass));
    TextWriter writer = new StreamWriter("Filename.XML");
    for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
    {
        MyClass abc = new MyClass(Convert.ToInt32(dataGridView1.Rows[i].Cells[0].Value), dataGridView1.Rows[i].Cells[1].Value.ToString(), dataGridView1.Rows[i].Cells[2].Value.ToString());
        myClassList.Root.Add(abc);

    }
    ser.Serialize(writer, myClassList);
    writer.Close();
}

答案 2 :(得分:0)

您可以按照以下方式执行此操作:

var ser = new XmlSerializer(typeof(MyClass));
using (var writer = XmlWriter.Create("Filename.XML", new XmlWriterSettings { Indent = true }))
{
    writer.WriteStartElement("root");
    for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
    {
        MyClass abc = new MyClass(Convert.ToInt32(dataGridView1.Rows[i].Cells[0].Value), dataGridView1.Rows[i].Cells[1].Value.ToString(), dataGridView1.Rows[i].Cells[2].Value.ToString());
        ser.Serialize(writer, abc);
    }
    writer.WriteEndElement();
}

在这里,我们使用XmlWriter手动创建根元素,允许您使用XmlSerializer重复编写。

但是,最好使用像List<MyClass>这样的集合,并且(de)完全序列化它。

另外,我建议你做数据绑定:

var list = new List<MyClass>();
// fill the list

// bind collection to control
dataGridView1.DataSource = list;