详解根据xsd生成xml文档的示例代码分析

现在有很多的xml工具软件都能根据xsd文件书写出xml文档，.net 没有实现此方法，如是我写了几个浏览、校验、和创建xml的方法
全部代码如下：
using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.Xml;using System.Xml.Schema;using System.Collections;/// <summary>/// ProXML 的摘要说明/// </summary>public class ProXml{    public ProXml()    {        //        // TODO: 在此处添加构造函数逻辑        //    }    /// <summary>    /// 获得xsd文件路径    /// </summary>    public static string GetSchemaPath    {            get{               return HttpContext.Current.Request.PhysicalApplicationPath + "App_Data\\system\\publish.xsd";           }    }    /// <summary>    /// 获理节点    /// </summary>    /// <returns></returns>    public static System.Collections.Generic.List<XmlSchemaElement> GetDatas()    {        XmlSchemaSet xsSet = new XmlSchemaSet();        xsSet.Add("http://www.w3.org/2001/XMLSchema", GetSchemaPath);        xsSet.Compile();        XmlSchema schema = null;        foreach (XmlSchema xs in xsSet.Schemas())        {            schema = xs;        }        System.Collections.Generic.List<XmlSchemaElement> elements=new System.Collections.Generic.List<XmlSchemaElement> ();        foreach (XmlSchemaObject obj in schema.Elements.Values)        {            if (obj.GetType() == typeof(XmlSchemaElement))            {                elements.Add((XmlSchemaElement)obj);            }        }        return elements;          }    /// <summary>    /// 添加元素    /// </summary>    /// <param name="sourceXsd"></param>    /// <param name="titles"></param>    /// <param name="sourceXml"></param>    /// <param name="sourceNd"></param>    /// <param name="values"></param>    public static   void AddElement(XmlSchemaObject sourceXsd, Hashtable titles, XmlDocument sourceXml, XmlNode sourceNd, string[] values)    {        if (sourceXsd.GetType() == typeof(XmlSchemaChoice))        {            XmlSchemaChoice choice = sourceXsd as XmlSchemaChoice;            decimal min = choice.MinOccurs;            foreach (XmlSchemaObject item in choice.Items)            {                if (item.GetType() == typeof(XmlSchemaElement))                {                    string name = ((XmlSchemaElement)item).Name;                    if (titles.ContainsKey(name))                    {                        XmlElement element = sourceXml.CreateElement(name);                       // element.InnerText = ((Excel.Range)st.Cells[rowIndex, (int)titles[name]]).Value2.ToString();                        element.InnerText = values[(int)titles[name]];                        sourceNd.AppendChild(element);                    }                }                else                {                    AddElement (item, titles, sourceXml, sourceNd, values);                }            }        }        else if (sourceXsd.GetType() == typeof(XmlSchemaElement))        {            string name = ((XmlSchemaElement)sourceXsd).Name;            if (titles.ContainsKey(name))            {                XmlElement element = sourceXml.CreateElement(name);                element.InnerText = values[(int)titles[name]];                sourceNd.AppendChild(element);            }        }        else if (sourceXsd.GetType() == typeof(XmlSchemaSequence))        {            foreach (XmlSchemaObject childItem in ((XmlSchemaSequence)sourceXsd).Items)            {                if (childItem.GetType() == typeof(XmlSchemaElement))                {                    string name = ((XmlSchemaElement)childItem).Name;                    if (titles.ContainsKey(name))                    {                        XmlElement element = sourceXml.CreateElement(name);                        element.InnerText = values[(int)titles[name]];                        sourceNd.AppendChild(element);                    }                }                else                {                    AddElement(childItem, titles, sourceXml, sourceNd, values);                }            }        }        else        {            return;        }    }   /// <summary>   /// 获得元素   /// </summary>   /// <param name="name"></param>   /// <returns></returns>    public static System.Collections.Generic.List<XmlSchemaElement> GetDataItem(string name)    {        System.Collections.Generic.List<XmlSchemaElement> arr = new System.Collections.Generic.List<XmlSchemaElement>();        XmlSchemaElement element = GetTableSchema(name);        if (element == null)        {            return null;        }        XmlSchemaComplexType complex = element.SchemaType as XmlSchemaComplexType;        XmlSchemaSequence sequence = complex.ContentTypeParticle as XmlSchemaSequence;             foreach (XmlSchemaObject obj in sequence.Items)        {            if (obj.GetType() == typeof(XmlSchemaElement))            {                XmlSchemaElement item = (XmlSchemaElement)obj;                arr.Add(item);                           }            else            {                GetItem(arr, obj);            }        }        return arr;    }    public static void GetItem(System.Collections.Generic.List<XmlSchemaElement> arr, XmlSchemaObject obj)    {        if (obj.GetType() == typeof(XmlSchemaElement))        {            XmlSchemaElement item = (XmlSchemaElement)obj;            arr.Add(item);        }        else if (obj.GetType() == typeof(XmlSchemaChoice))        {            XmlSchemaChoice choice = obj as XmlSchemaChoice;            foreach (XmlSchemaObject child in choice.Items)            {                if (child.GetType() == typeof(XmlSchemaElement))                {                    XmlSchemaElement item = child as XmlSchemaElement;                    arr.Add(item);                }                else                {                    GetItem(arr, child);                }            }        }        else if (obj.GetType() == typeof(XmlSchemaSequence))        {            XmlSchemaSequence sequence = obj as XmlSchemaSequence;            foreach (XmlSchemaObject child in sequence.Items)            {                if (child.GetType() == typeof(XmlSchemaObject))                {                    XmlSchemaElement item = child as XmlSchemaElement;                    arr.Add(item);                }                else                {                    GetItem(arr, child);                }            }        }        else        {            return;        }    }    /// <summary>    /// 根据节点名获得节点    /// </summary>    /// <param name="name"></param>    /// <returns></returns>    public static XmlSchemaElement GetTableSchema(string name)    {        XmlSchemaSet xsSet = new XmlSchemaSet();        xsSet.Add("http://www.w3.org/2001/XMLSchema", GetSchemaPath);        xsSet.Compile();        XmlSchema schema=null;        foreach (XmlSchema xs in xsSet.Schemas())        {            schema = xs;        }        XmlQualifiedName qf = new XmlQualifiedName(name, "http://www.w3.org/2001/XMLSchema");        if(schema.Elements.Contains(qf))        {            return (XmlSchemaElement)schema.Elements[qf];        }        return null;    }     static  void XmlValidation(object sendor, ValidationEventArgs e)       {           switch (e.Severity)           {               case XmlSeverityType.Error:                   throw e.Exception;               case XmlSeverityType.Warning:                   throw e.Exception;           }       }  /// <summary>  /// 校验dom对象  /// </summary>  /// <param name="doc"></param>  /// <returns></returns>       public static string CheckDataXml(XmlDocument doc)       {           XmlSchemaSet xsd = new XmlSchemaSet();           xsd.Add("", GetSchemaPath);           doc.Schemas = xsd;           try           {               doc.Validate(new ValidationEventHandler(XmlValidation));           }           catch (Exception ex)           {               return ex.Message;           }           return null;       }}
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