.net下用dtd文檔驗證xml

 .net 用dtd驗證xml
 還是在微軟支援人員中心找到答案.
 1.建立book.xml檔案，dtd也可以另存新檔一個檔案，xml檔案裡面加上dtd路徑就可以了
<!DOCTYPE Product SYSTEM "book.dtd">

<!DOCTYPE bookstore [
  <!ELEMENT bookstore (book)*>
  <!ELEMENT book (title,author,price)>
  <!ATTLIST book genre CDATA #REQUIRED>
  <!ELEMENT title (#PCDATA)>
  <!ELEMENT author (#PCDATA)>
  <!ELEMENT price (#PCDATA)>]>
<bookstore>
  <book genre="fantasy"  ISBN="2-3631-4">
    <title>Oberon's Legacy</title>
    <author>Corets, Eva</author>
    <price>5.95</price>
  </book>
</bookstore>

2.產生C#驗證代碼
public bool Validate(string filename)
    {
//省略了驗證出錯處理 直接在當前程式碼片段處理即可
//        System.Xml.Schema.ValidationEventHandler eventHandler =  new  System.Xml.Schema.ValidationEventHandler(MyValidationEventHandler);
        System.Xml.XmlReader reader = null;

        try
        {
            // 聲明驗證變數
            System.Xml.XmlReaderSettings settings = new System.Xml.XmlReaderSettings();
            settings.ProhibitDtd = false;//允許dtd驗證 設為true會產生異常
            //驗證類型設為DTD 如果不需要驗證可以設為ValidationType.None
            settings.ValidationType = System.Xml.ValidationType.DTD;
           
            //settings.ValidationEventHandler += eventHandler;

            //建立xml讀取變數
            reader = System.Xml.XmlReader.Create(Server.MapPath(filename), settings);

            // 將reader賦值給XmlDocument，方便處理，xmlreader本身處理能力很弱，如其名，只能讀
            // 驗證失敗將會引發一個validation異常
            // 然而資料還是讀到了XmlDocument裡面的，仍然可以處理
            System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
            doc.Load(reader);        }
        catch(System.Xml.XmlException e)
        {
            Response.Write(e.Message);
            return false;
        }
        catch(System.Xml.Schema.XmlSchemaException e)
        {
            Response.Write(e.Message);
            return false;
        }
        finally
        {
            if (reader != null)   reader.Close();
        }

        return true;
    }