在C＃中使用linq to xml以正确的方式创建xml的子元素

Question

My problem is that the store name should be the sub element of company name but what happen is that they are the same in line How can I fix this?

Here is the sample output:

    <?xml version="1.0" encoding="utf-8"?>
<Records>
  <CompanyName>Company 1</CompanyName>
  <StoreName>Store 2</StoreName>
  <StoreName>Store 3</StoreName>
  <StoreName>Store 5</StoreName>
  <CompanyName>Company 2</CompanyName>
  <StoreName>Store 1</StoreName>
  <StoreName>Store 4</StoreName>
</Records>

Here is my code:

qlCommand cmd = new SqlCommand("select company_name, company_id from company", cn);
            //SqlCommand cmd = new SqlCommand("SELECT dbo.company.company_name, dbo.store.store_name, dbo.store.company_id FROM dbo.company INNER JOIN dbo.store ON dbo.company.company_id = dbo.store.company_id", cn);
            SqlDataAdapter adapter = new SqlDataAdapter(cmd);
            DataTable dt = new DataTable();
            adapter.Fill(dt);

            SqlCommand cmd2 = new SqlCommand("select store_name, company_id from store", cn);
            SqlDataAdapter adapter2 = new SqlDataAdapter(cmd2);
            DataTable dt2 = new DataTable();
            adapter2.Fill(dt2);

            dataGridView1.DataSource = dt;

            XElement xml = new XElement("Records");
            foreach (DataRow row in dt.Rows)
            {
                xml.Add(new XElement("CompanyName", row["company_name"].ToString()));
                foreach (DataRow row1 in dt2.Rows)
                {
                    if(row["company_id"].ToString() == row1["company_id"].ToString())
                    {
                        xml.Add(new XElement("StoreName", row1["store_name"].ToString()));
                    }
                }
            }

            xml.Save("C:\\Users\\PHWS13\\Desktop\\test.xml");

Answer 1

The problem is that you are adding the element to xml which is always at the same level (ie you are always adding elements as children of your "Records" element).

Try this:

XElement xml = new XElement("Records");
foreach (DataRow row in dt.Rows)
{
    var companyName = new XElement("CompanyName", row["company_name"].ToString())
    xml.Add(companyName);
    foreach (DataRow row1 in dt2.Rows)
    {
        if(row["company_id"].ToString() == row1["company_id"].ToString())
        {
            companyName.Add(new XElement("StoreName", row1["store_name"].ToString()));
        }
    }
}