20120516-程式-解析XSD Schema的程式寫法

在這一篇文章裡，很完整提到 Parsing XSD 架構的方法：
Parsing XSD Schema with SOM
另相關文：
using XmlArrayItem attribute without XmlArray on Serializable C# class
而我就將它的內容資訊截錄整理到我的Blog。
========================================================
1. 先Parsing 出它的 XmlSchema 物件

 
private XmlSchema ReadAndCompileSchema(string fileName)
{......}
private void ValidationCallbackOne(object sender, ValidationEventArgs args)
{......}

2. 在取得它的XmlSchema物件後，開始去Loop 它的結構：
(parentTradeName 是專案使用額外加入參數)

 
            tradeNamespace = custSchema.TargetNamespace;
            foreach (XmlSchemaElement elem in custSchema.Elements.Values)
            {
                ProcessElement(elem, "");
            }

//針對元素處理
private static void ProcessElement(XmlSchemaElement elem)
{
    Console.WriteLine("Element: {0}", elem.Name);

    if (elem.ElementSchemaType is XmlSchemaComplexType)
    {
 XmlSchemaComplexType ct = 
  elem.ElementSchemaType as XmlSchemaComplexType;

 foreach (DictionaryEntry obj in ct.AttributeUses)
  Console.WriteLine("Attribute: {0}  ", 
  (obj.Value as XmlSchemaAttribute).Name);

 ProcessSchemaObject(ct.ContentTypeParticle);
    }
else 
{
//一般element的屬性資訊
  }
}

//判斷此Schema Tag 是什麼
private static void ProcessSchemaObject(XmlSchemaObject obj)
{
    if (obj is XmlSchemaElement)
        ProcessElement(obj as XmlSchemaElement);
    if (obj is XmlSchemaChoice)
        ProcessChoice(obj as XmlSchemaChoice);
    if (obj is XmlSchemaAll)
        ProcessSchemaAll(obj as XmlSchemaAll, parentTradeName);
    if (obj is XmlSchemaSequence)
        ProcessSequence(obj as XmlSchemaSequence);
}


 private void ProcessSequence(XmlSchemaSequence sequence, string parentTradeName)
        {
            Console.WriteLine("Sequence");
            ProcessItemCollection(sequence.Items, parentTradeName);
        }

        private void ProcessChoice(XmlSchemaChoice choice, string parentTradeName)
        {
            Console.WriteLine("Choice");
            ProcessItemCollection(choice.Items, parentTradeName);
        }

        private void ProcessSchemaAll(XmlSchemaAll schemaAll, string parentTradeName)
        {
            Console.WriteLine("Choice");
            ProcessItemCollection(schemaAll.Items, parentTradeName);
        }

        private void ProcessItemCollection(XmlSchemaObjectCollection objs, string parentTradeName)
        {
            foreach (XmlSchemaObject obj in objs)
                ProcessSchemaObject(obj, parentTradeName);
        }

屬性MEMO：

 
XmlSchemaElement elem
elem.ElementSchemaType //這元素的SchemaType

 XmlSchemaComplexType ct =
                    elem.ElementSchemaType as XmlSchemaComplexType;
ct.ContentTypeParticle  //它為 XmlSchemaObject 再判斷它的obj為何種XmlSchema 

==========================================

因這一次要產生對應的Class程式碼，所以全在 Function ProcessElement() 判斷

if (elem.ElementSchemaType is XmlSchemaComplexType)
{
      //它有子層的複雜格式
}
else
{
     //Element元素；如：<xs:element name="RspCode" type="xs:string">   
}