database ทีมีอยู่ sql server 2005 ให้เป็น xml อย่างไรครับ รบกวนหน่อยครับ การทำ database เป็น xml ต้องทำอย่างไรครับ ช่วยหน่อยนะครับ

			Dim objConn As New SqlConnection
			Dim objCmd As New SqlCommand
			Dim dtAdapter As New SqlDataAdapter

			Dim ds As New DataSet
			Dim strConnString,strSQL As String

			strConnString = "Server=localhost;Uid=sa;PASSWORD=;database=mydatabase;Max Pool Size=400;Connect Timeout=600;"
			strSQL = "SELECT * FROM customer"

			objConn.ConnectionString = strConnString
			With objCmd
			.Connection = objConn
			.CommandText = strSQL
			.CommandType = CommandType.Text
			End With
			dtAdapter.SelectCommand = objCmd

			dtAdapter.Fill(ds)

			dtAdapter = Nothing
			objConn.Close()
			objConn = Nothing

			'*** Export XML ***'
			ds.Tables(0).WriteXML("C:\XML\myXml.xml")
			'ds.Tables(0).WriteXmlSchema("C:\XML\myXml.xml")			
			ds = Nothing

SqlConnection objConn = new SqlConnection();
SqlCommand objCmd = new SqlCommand();
SqlDataAdapter dtAdapter = new SqlDataAdapter();

DataSet ds = new DataSet();
string strConnString = null;
string strSQL = null;

strConnString = "Server=localhost;Uid=sa;PASSWORD=;database=mydatabase;Max Pool Size=400;Connect Timeout=600;";
strSQL = "SELECT * FROM customer";

objConn.ConnectionString = strConnString;
var _with1 = objCmd;
_with1.Connection = objConn;
_with1.CommandText = strSQL;
_with1.CommandType = CommandType.Text;
dtAdapter.SelectCommand = objCmd;

dtAdapter.Fill(ds);

dtAdapter = null;
objConn.Close();
objConn = null;

//*** Export XML ***'
ds.Tables[0].WriteXml("C:\\XML\\myXml.xml");
//ds.Tables(0).WriteXmlSchema("C:\XML\myXml.xml")			
ds = null;

        XmlDocument xmlDoc = new XmlDocument();


        // Write down the XML declaration
        XmlDeclaration xmlDeclaration = xmlDoc.CreateXmlDeclaration("1.0","utf-8",null); 

        // Create the root element
        XmlElement rootNode  = xmlDoc.CreateElement("CategoryList");
        xmlDoc.InsertBefore(xmlDeclaration, xmlDoc.DocumentElement); 
        xmlDoc.AppendChild(rootNode);

        // Create a new <Category> element and add it to the root node
        XmlElement parentNode  = xmlDoc.CreateElement("Category");

        // Set attribute name and value!
        parentNode.SetAttribute("ID", "01");

        xmlDoc.DocumentElement.PrependChild(parentNode);

        // Create the required nodes
        XmlElement mainNode  = xmlDoc.CreateElement("MainCategory");
        XmlElement descNode  = xmlDoc.CreateElement("Description");
        XmlElement activeNode  = xmlDoc.CreateElement("Active");

        // retrieve the text 
        XmlText categoryText= xmlDoc.CreateTextNode("XML");
        XmlText descText  = xmlDoc.CreateTextNode("This is a list my XML articles.");
        XmlText activeText  = xmlDoc.CreateTextNode("true");

        // append the nodes to the parentNode without the value
        parentNode.AppendChild(mainNode);
        parentNode.AppendChild(descNode);
        parentNode.AppendChild(activeNode);

        // save the value of the fields into the nodes
        mainNode.AppendChild(categoryText);
        descNode.AppendChild(descText);
        activeNode.AppendChild(activeText);

        // Save to the XML file
        xmlDoc.Save("C:\\categories.xml);

int FakeQuantity = 0;
XmlDocument Doc = new XmlDocument();
XmlAttribute newAtt = default(XmlAttribute);
XmlElement TempNode = default(XmlElement);

// Use the XmlDeclaration class to place the
// <?xml version="1.0"?> declaration at the top of our XML file
XmlDeclaration dec = Doc.CreateXmlDeclaration("1.0", null, null);
Doc.AppendChild(dec);
XmlElement DocRoot = Doc.CreateElement("Orders");
Doc.AppendChild(DocRoot);

// Generate a couple of phony orders
int x = 0;
for (x = 0; x <= 11; x++) {
	XmlNode Order = Doc.CreateElement("Order");
	newAtt = Doc.CreateAttribute("Quantity");
	FakeQuantity = 10 * x + x;
	newAtt.Value = FakeQuantity.ToString();
	Order.Attributes.Append(newAtt);
	DocRoot.AppendChild(Order);
}

Doc.Save("OutDocument.xml");

private void insertdata()
        {
            SqlCeConnection myConnection = default(SqlCeConnection);
            myConnection = new SqlCeConnection("Data Source =" + (System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase) + "\\DB_REST.sdf;"));
            myConnection.Open();
            
         
                SqlCeCommand myCommand = myConnection.CreateCommand();
                myCommand.CommandText = "INSERT INTO [Orders] ([Order_Id], [Order_date], [Order_money], [Table_Id], [Order_time] ) VALUES  " + " ('" + this.txtOrderNum.Text + "','" + this.txtDate.Text + "','" + this.txtSumPrice.Text + "','" + this.txtTable.Text + "','" + this.txtTime.Text + "' ) ";

                myCommand.CommandType = CommandType.Text;
                myCommand.ExecuteNonQuery();
                

                for (int i = 0; i < dt.Rows.Count - 1; i++)
                {

                    String OrderId = txtOrderNum.Text;
                    String qty = dataGrid2[dataGrid2.CurrentCell.RowNumber, 3].ToString();
                    String FoodID = dataGrid2[dataGrid2.CurrentCell.RowNumber, 0].ToString();

                    //SqlCeCommand myCommand = myConnection.CreateCommand();
                    myCommand.CommandText = "INSERT INTO [Order_Detail] ([Order_Id], [QTY], [Food_Id] ) VALUES  " + " ('" + OrderId + "','" + qty + "','" + FoodID + "') ";

                    myCommand.CommandType = CommandType.Text;
                    myCommand.ExecuteNonQuery();
                    
                    myConnection.Close();

                }
                MessageBox.Show("Save Successfully");
            
        }