怎么动态根据一个业务实体类型创建XSD架构文件
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这篇文章主要为大家展示了“怎么动态根据一个业务实体类型创建XSD架构文件”，内容简而易懂，条理清晰，希望能够帮助大家解决疑惑，下面让小编带领大家一起研究并学习一下“怎么动态根据一个业务实体类型创建XSD架构文件”这篇文章吧。
目前该功能仅仅是一个原型，还有待细化改进。例如在实体的成员上用一些特定的Attribute标明该成员要被保存的形态。
创建XSD架构文件***部分：业务实体类
(作为演示目的，我将所有的类型定义在一个文件里，同时每个类都只有少量简单的属性成员）
此处特别注意的是，Order这个类是很复杂的，它包含了一系列的OrderItem，而OrderItem又包含了Product对象。
using System; using System.Collections.Generic; using System.Text; namespace DataEntities { public class Order { public int OrderID { get; set; } public string CustomerID { get; set; } public int EmployeeID { get; set; } public DateTime OrderDate { get; set; } public List<OrderItem> OrderItems { get; set; } public override string ToString() { StringBuilder sb = new StringBuilder(); sb.AppendFormat("\t{0}\t{1}\t{2}\t{3}", OrderID, CustomerID, EmployeeID, OrderDate); sb.AppendLine(); foreach (var item in OrderItems) { sb.AppendFormat("\t\t{0}\t{1}\t{2}\n", item.Product.ProductName, item.UnitPrice, item.Quantity); } return sb.ToString(); } } public class OrderItem { public int OrderId { get; set; } public Product Product { get; set; } public decimal UnitPrice { get; set; } public decimal Quantity { get; set; } } public class Product { public int ProductId { get; set; } public string ProductName { get; set; } } }创建XSD架构文件第二部分：生成XSD的工具类(Utility.cs)
using System; using System.Xml.Linq; using System.Collections; using System.Xml; namespace XMLDatabase { public class Utility { /// <summary> /// 使用指定类型生成一个架构文件 /// </summary> /// <typeparam name="T"></typeparam> public static void XsdGenerate<T>(XmlWriter xw) { Type t = typeof(T); XNamespace xn = "http://www.w3.org/2001/XMLSchema"; XDocument doc = new XDocument( new XDeclaration("1.0", "utf-8", "yes"), new XElement(xn + "schema", new XAttribute("elementFormDefault", "qualified"), new XAttribute(XNamespace.Xmlns + "xs", "http://www.w3.org/2001/XMLSchema"), new XElement(xn+"element", new XAttribute("name","Table"), new XAttribute("nillable","true"), new XAttribute("type","Table")) )); XElement tableElement = new XElement(xn + "complexType", new XAttribute("name", "Table")); tableElement.Add( new XElement(xn + "sequence", new XElement(xn + "element", new XAttribute("minOccurs", "0"), new XAttribute("maxOccurs", "unbounded"), new XAttribute("name","Row"), new XAttribute("type",t.Name) )), new XElement(xn + "attribute", new XAttribute("name", "CreateTime"), new XAttribute("type", "xs:string")) ); doc.Root.Add(tableElement); CreateComplexType(t, doc.Root); doc.Save(xw); } private static void CreateComplexType(Type t,XElement root) { XNamespace xn = root.GetNamespaceOfPrefix("xs"); XElement temp = new XElement( xn + "complexType", new XAttribute("name", t.Name)); #region 循环所有属性 foreach (var p in t.GetProperties())//循环所有属性 { Type ppType = p.PropertyType; string fullType = pType.FullName; //这里仍然是分几种情况 if (!GeneralType.Contains(fullType)) { var seqelement = temp.Element(xn + "sequence"); if (seqelement == null) { seqelement = new XElement(xn + "sequence"); temp.AddFirst(seqelement); } if (pType.IsEnum)//如果是枚举 { seqelement.Add( new XElement( xn + "element", new XAttribute("minOccurs", "0"), new XAttribute("maxOccurs", "1"), new XAttribute("name", p.Name), new XAttribute("type", pType.Name))); XElement enumElement = new XElement( xn + "complexType", new XAttribute("name", pType.Name), new XElement(xn + "attribute", new XAttribute("name", "Enum"), new XAttribute("type", "xs:string"))); root.Add(enumElement); } else if (pType.GetInterface(typeof(IList).FullName) != null && pType.IsGenericType) //如果是集合,并且是泛型集合 { Type itemType = pType.GetGenericArguments()[0]; seqelement.Add( new XElement( xn + "element", new XAttribute("minOccurs", "0"), new XAttribute("maxOccurs", "1"), new XAttribute("name", p.Name), new XAttribute("type", "ArrayOf"+p.Name))); XElement arrayElement = new XElement( xn + "complexType", new XAttribute("name", "ArrayOf" + p.Name), new XElement(xn + "sequence", new XElement(xn + "element", new XAttribute("minOccurs", "0"), new XAttribute("maxOccurs", "unbounded"), new XAttribute("name", itemType.Name), new XAttribute("type", itemType.Name)))); root.Add(arrayElement); CreateComplexType(itemType, root); } else if (pType.IsClass || pType.IsValueType) { seqelement.Add( new XElement( xn + "element", new XAttribute("minOccurs", "0"), new XAttribute("maxOccurs", "1"), new XAttribute("name", p.Name), new XAttribute("type", pType.Name))); CreateComplexType(pType, root); } } else { //这种情况最简单，属性为标准内置类型，直接作为元素的Attribute即可 temp.Add( new XElement(xn + "attribute", new XAttribute("name", p.Name), new XAttribute("type", GeneralType.ConvertXSDType(pType.FullName)))); } } #endregion temp.Add(new XElement(xn + "attribute", new XAttribute("name", "TypeName"), new XAttribute("type", "xs:string"))); root.Add(temp); } } }创建XSD架构文件第三部分：辅助类型(GeneralType.cs).
这个类型中有一个方法可以将业务实体类型成员属性的类型转换为XSD中 的类型。
using System; using System.Collections.Generic; using System.Text; namespace XMLDatabase { public class GeneralType { private static readonly List<string> generalTypes = new List<string>() { "System.Byte",//typeof(byte).FullName, "System.SByte",//typeof(sbyte).FullName, "System.Int16",//typeof(short).FullName, "System.UInt16",//typeof(ushort).FullName, "System.Int32",//typeof(int).FullName, "System.UInt32",//typeof(uint).FullName, "System.Int64",//typeof(long).FullName, "System.UInt64",//typeof(ulong).FullName, "System.Double",//typeof(double).FullName, "System.Decimal",//typeof(decimal).FullName, "System.Single",//typeof(float).FullName, "System.Char",//typeof(char).FullName, "System.Boolean",//typeof(bool).FullName, "System.String",//typeof(string).FullName, "System.DateTime"//typeof(DateTime).FullName }; /// <summary> /// 判断当前给定类型是否为默认的数据类型 /// </summary> /// <param name="fullType"></param> /// <returns></returns> public static bool Contains(string fullType) { return generalTypes.Contains(fullType); } public static string ConvertXSDType(string fullType) { switch (fullType) { case "System.String": return "xs:string"; case "System.Int32": return "xs:int"; case "System.DateTime": return "xs:dateTime"; case "System.Boolean": return "xs:boolean"; case "System.Single": return "xs:float"; case "System.Byte": return "xs:byte"; case "System.SByte": return "xs:unsignedByte"; case "System.Int16": return "xs:short"; case "System.UInt16": return "xs:unsignedShort"; case "System.UInt32": return "xs:unsignedInt"; case "System.Int64": return "xs:long"; case "System.UInt64": return "xs:unsignedLong"; case "System.Double": return "xs:double"; case "System.Decimal": return "xs:decimal"; default: break; } return string.Empty; } } }创建XSD架构文件第四部分：单元测试
/// <summary> ///XsdGenerate 的测试 ///</summary> public void XsdGenerateTestHelper<T>() { XmlWriter xw = XmlWriter.Create("Order.xsd"); // TODO: 初始化为适当的值 Utility.XsdGenerate<Order>(xw); xw.Close(); }创建XSD架构文件第五部分： 生成的结果
<?xml version="1.0" encoding="utf-8" standalone="yes"?> <xs:schema elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="Table" nillable="true" type="Table" /> <xs:complexType name="Table"> <xs:sequence> <xs:element minOccurs="0" maxOccurs="unbounded" name="Row" type="Order" /> </xs:sequence> <xs:attribute name="CreateTime" type="xs:string" /> </xs:complexType> <xs:complexType name="ArrayOfOrderItems"> <xs:sequence> <xs:element minOccurs="0" maxOccurs="unbounded" name="OrderItem" type="OrderItem" /> </xs:sequence> </xs:complexType> <xs:complexType name="Product"> <xs:attribute name="ProductId" type="xs:int" /> <xs:attribute name="ProductName" type="xs:string" /> <xs:attribute name="TypeName" type="xs:string" /> </xs:complexType> <xs:complexType name="OrderItem"> <xs:sequence> <xs:element minOccurs="0" maxOccurs="1" name="Product" type="Product" /> </xs:sequence> <xs:attribute name="OrderId" type="xs:int" /> <xs:attribute name="UnitPrice" type="xs:decimal" /> <xs:attribute name="Quantity" type="xs:decimal" /> <xs:attribute name="TypeName" type="xs:string" /> </xs:complexType> <xs:complexType name="Order"> <xs:sequence> <xs:element minOccurs="0" maxOccurs="1" name="OrderItems" type="ArrayOfOrderItems" /> </xs:sequence> <xs:attribute name="OrderID" type="xs:int" /> <xs:attribute name="CustomerID" type="xs:string" /> <xs:attribute name="EmployeeID" type="xs:int" /> <xs:attribute name="OrderDate" type="xs:dateTime" /> <xs:attribute name="TypeName" type="xs:string" /> </xs:complexType> </xs:schema>创建XSD架构文件第六部分：合法的数据文件范例
<?xml version="1.0" encoding="utf-8"?> <Table Name="Orders" CreateTime="2009/8/9 21:59:04"> <Row TypeName="DataEntities.Order" OrderID="10249" CustomerID="ABCDEF" EmployeeID="1" OrderDate="2009-08-09T21:59:04.125+08:00"> <OrderItems> <OrderItem TypeName="DataEntities.OrderItem" OrderId="10249" UnitPrice="25" Quantity="4"> <Product TypeName="DataEntities.Product" ProductId="1" ProductName="Pen" /> </OrderItem> <OrderItem TypeName="DataEntities.OrderItem" OrderId="10249" UnitPrice="2" Quantity="2000"> <Product TypeName="DataEntities.Product" ProductId="1" ProductName="Car" /> </OrderItem> </OrderItems> </Row> <Row TypeName="DataEntities.Order" OrderID="10249" CustomerID="ABCDEF" EmployeeID="1" OrderDate="2009-08-10T07:29:51.546875+08:00"> <OrderItems> <OrderItem TypeName="DataEntities.OrderItem" OrderId="10249" UnitPrice="25" Quantity="4"> <Product TypeName="DataEntities.Product" ProductId="1" ProductName="Pen" /> </OrderItem> <OrderItem TypeName="DataEntities.OrderItem" OrderId="10249" UnitPrice="2" Quantity="2000"> <Product TypeName="DataEntities.Product" ProductId="1" ProductName="Car" /> </OrderItem> </OrderItems> </Row> <Row TypeName="DataEntities.Order" OrderID="10249" CustomerID="ABCDEF" EmployeeID="1" OrderDate="2009-08-10T07:30:13.375+08:00"> <OrderItems> <OrderItem TypeName="DataEntities.OrderItem" OrderId="10249" UnitPrice="25" Quantity="4"> <Product TypeName="DataEntities.Product" ProductId="1" ProductName="Pen" /> </OrderItem> <OrderItem TypeName="DataEntities.OrderItem" OrderId="10249" UnitPrice="2" Quantity="2000"> <Product TypeName="DataEntities.Product" ProductId="1" ProductName="Car" /> </OrderItem> </OrderItems> </Row> <Row TypeName="DataEntities.Order" OrderID="10249" CustomerID="ABCDEF" EmployeeID="1" OrderDate="2009-08-10T07:30:43.875+08:00"> <OrderItems> <OrderItem TypeName="DataEntities.OrderItem" OrderId="10249" UnitPrice="25" Quantity="4"> <Product TypeName="DataEntities.Product" ProductId="1" ProductName="Pen" /> </OrderItem> <OrderItem TypeName="DataEntities.OrderItem" OrderId="10249" UnitPrice="2" Quantity="2000"> <Product TypeName="DataEntities.Product" ProductId="1" ProductName="Car" /> </OrderItem> </OrderItems> </Row> </Table>以上是“怎么动态根据一个业务实体类型创建XSD架构文件”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注编程网行业资讯频道！
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