C#中读取pdm文件信息(PowerDesigner读取方法)(源码共享)

其实PowerDesigner的pdm文件是一个xml文件来的，我们可以当作读取xml文件一样的方式来读pdm文件。

其中，我们需要注意的是：如果我们不使用命名空间管理器的话，系统会提示如下错误：

需要命名空间管理器或 XsltContext。此查询具有前缀、变量或用户定义的函数。  
说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。  

异常详细信息: System.Xml.XPath.XPathException: 需要命名空间管理器或 XsltContext。此查询具有前缀、变量或用户定义的函数。
因此，我们读取pdm文件代码如下：

xmlDoc = new XmlDocument(); xmlDoc.Load(pdmFile); xmlnsManager = new XmlNamespaceManager(xmlDoc.NameTable); xmlnsManager.AddNamespace("a", "attribute"); xmlnsManager.AddNamespace("c", "collection"); xmlnsManager.AddNamespace("o", "object"); XmlNode xnTables = xmlDoc.SelectSingleNode("//" + cTables, xmlnsManager);

其实C#读取pdm文件难度并不大，只是一种体力活，为了后人少走点弯路，我下面公布一下代码：

ColumnInfo.cs（字段类）

namespace Piggy.Common.PDM { //字段信息 public class ColumnInfo { public ColumnInfo() { } string columnId; public string ColumnId { get { return columnId; } set { columnId = value; } } string objectID; public string ObjectID { get { return objectID; } set { objectID = value; } } string name; public string Name { get { return name; } set { name = value; } } string code; public string Code { get { return code; } set { code = value; } } int creationDate; public int CreationDate { get { return creationDate; } set { creationDate = value; } } string creator; public string Creator { get { return creator; } set { creator = value; } } int modificationDate; public int ModificationDate { get { return modificationDate; } set { modificationDate = value; } } string modifier; public string Modifier { get { return modifier; } set { modifier = value; } } string comment; public string Comment { get { return comment; } set { comment = value; } } string dataType; public string DataType { get { return dataType; } set { dataType = value; } } string length; public string Length { get { return length; } set { length = value; } } //是否自增量 bool identity; public bool Identity { get { return identity; } set { identity = value; } } bool mandatory; //禁止为空 public bool Mandatory { get { return mandatory; } set { mandatory = value; } } string extendedAttributesText; //扩展属性 public string ExtendedAttributesText { get { return extendedAttributesText; } set { extendedAttributesText = value; } } string physicalOptions; public string PhysicalOptions { get { return physicalOptions; } set { physicalOptions = value; } } } }
PdmKey.cs（主键类）

using System.Collections.Generic; namespace Piggy.Common.PDM { public class PdmKey { public PdmKey() { } string keyId; public string KeyId { get { return keyId; } set { keyId = value; } } string objectID; public string ObjectID { get { return objectID; } set { objectID = value; } } string name; public string Name { get { return name; } set { name = value; } } string code; public string Code { get { return code; } set { code = value; } } int creationDate; public int CreationDate { get { return creationDate; } set { creationDate = value; } } string creator; public string Creator { get { return creator; } set { creator = value; } } int modificationDate; public int ModificationDate { get { return modificationDate; } set { modificationDate = value; } } string modifier; public string Modifier { get { return modifier; } set { modifier = value; } } IList<ColumnInfo> columns; public IList<ColumnInfo> Columns { get { return columns; } } public void AddColumn(ColumnInfo mColumn) { if (columns == null) columns = new List<ColumnInfo>(); columns.Add(mColumn); } } } TableInfo.cs（表信息类）using System.Collections.Generic; namespace Piggy.Common.PDM { //表信息 public class TableInfo { public TableInfo() { } string tableId; public string TableId { get { return tableId; } set { tableId = value; } } string objectID; public string ObjectID { get { return objectID; } set { objectID = value; } } string name; public string Name { get { return name; } set { name = value; } } string code; public string Code { get { return code; } set { code = value; } } int creationDate; public int CreationDate { get { return creationDate; } set { creationDate = value; } } string creator; public string Creator { get { return creator; } set { creator = value; } } int modificationDate; public int ModificationDate { get { return modificationDate; } set { modificationDate = value; } } string modifier; public string Modifier { get { return modifier; } set { modifier = value; } } string comment; public string Comment { get { return comment; } set { comment = value; } } string physicalOptions; public string PhysicalOptions { get { return physicalOptions; } set { physicalOptions = value; } } IList<ColumnInfo> columns; public IList<ColumnInfo> Columns { get { return columns; } } IList<PdmKey> keys; public IList<PdmKey> Keys { get { return keys; } } public void AddColumn(ColumnInfo mColumn) { if (columns == null) columns = new List<ColumnInfo>(); columns.Add(mColumn); } public void AddKey(PdmKey mKey) { if (keys == null) keys = new List<PdmKey>(); keys.Add(mKey); } } } PdmReader.cs（pdm文件读取器类）

using System.Xml; using System.Collections.Generic; using System; //using Common.Logging; namespace Piggy.Common.PDM { public class PdmReader : IPdmReader { //private static ILog log = LogManager.GetLogger(typeof(PdmReader)); public const string a = "attribute", c = "collection", o = "object"; public const string cClasses = "c:Classes"; public const string oClass = "o:Class"; public const string cAttributes = "c:Attributes"; public const string oAttribute = "o:Attribute"; public const string cTables = "c:Tables"; public const string oTable = "o:Table"; public const string cColumns = "c:Columns"; public const string oColumn = "o:Column"; XmlDocument xmlDoc; XmlNamespaceManager xmlnsManager; /// <summary>构造函数 </summary> public PdmReader() { // TODO: 在此处添加构造函数逻辑 //xmlDoc = new XmlDocument(); } /// <summary>构造函数 </summary> public PdmReader(string pdm_file) { PdmFile = pdm_file; } string pdmFile; public string PdmFile { get { return pdmFile; } set { pdmFile = value; if (xmlDoc == null) { xmlDoc = new XmlDocument(); xmlDoc.Load(pdmFile); xmlnsManager = new XmlNamespaceManager(xmlDoc.NameTable); xmlnsManager.AddNamespace("a", "attribute"); xmlnsManager.AddNamespace("c", "collection"); xmlnsManager.AddNamespace("o", "object"); } InitData(); } } IList<TableInfo> tables; public IList<TableInfo> Tables { get { return tables; } } public TableInfo FindTableByTableName(string tableName) { return FindTableByCode(tableName); } public TableInfo FindTableByCode(string tableCode) { foreach (TableInfo mTable in tables) { if (mTable.Code == tableCode) return mTable; } return null; } private void InitData() { if (tables == null) { tables = new List<TableInfo>(); XmlNode xnTables = xmlDoc.SelectSingleNode("//" + cTables, xmlnsManager); foreach (XmlNode xnTable in xnTables.ChildNodes) { Tables.Add(GetTable(xnTable)); } } } //初始化"o:Table"的节点 private TableInfo GetTable(XmlNode xnTable) { TableInfo mTable = new TableInfo(); XmlElement xe = (XmlElement)xnTable; mTable.TableId = xe.GetAttribute("Id"); XmlNodeList xnTProperty = xe.ChildNodes; foreach (XmlNode xnP in xnTProperty) { switch (xnP.Name) { case "a:ObjectID": mTable.ObjectID = xnP.InnerText; break; case "a:Name": mTable.Name = xnP.InnerText; break; case "a:Code": mTable.Code = xnP.InnerText; break; case "a:CreationDate": mTable.CreationDate = Convert.ToInt32(xnP.InnerText); break; case "a:Creator": mTable.Creator = xnP.InnerText; break; case "a:ModificationDate": mTable.ModificationDate = Convert.ToInt32(xnP.InnerText); break; case "a:Modifier": mTable.Modifier = xnP.InnerText; break; case "a:Comment": mTable.Comment = xnP.InnerText; break; case "a:PhysicalOptions": mTable.PhysicalOptions = xnP.InnerText; break; case "c:Columns": InitColumns(xnP, mTable); break; case "c:Keys": InitKeys(xnP, mTable); break; } } return mTable; } //初始化"c:Columns"的节点 private void InitColumns(XmlNode xnColumns, TableInfo pTable) { foreach (XmlNode xnColumn in xnColumns) { pTable.AddColumn(GetColumn(xnColumn)); } } //初始化c:Keys"的节点 private void InitKeys(XmlNode xnKeys, TableInfo pTable) { foreach (XmlNode xnKey in xnKeys) { pTable.AddKey(GetKey(xnKey)); } } private ColumnInfo GetColumn(XmlNode xnColumn) { ColumnInfo mColumn = new ColumnInfo(); XmlElement xe = (XmlElement)xnColumn; mColumn.ColumnId = xe.GetAttribute("Id"); XmlNodeList xnCProperty = xe.ChildNodes; foreach (XmlNode xnP in xnCProperty) { switch (xnP.Name) { case "a:ObjectID": mColumn.ObjectID = xnP.InnerText; break; case "a:Name": mColumn.Name= xnP.InnerText; break; case "a:Code": mColumn.Code = xnP.InnerText; break; case "a:CreationDate": mColumn.CreationDate = Convert.ToInt32(xnP.InnerText); break; case "a:Creator": mColumn.Creator = xnP.InnerText; break; case "a:ModificationDate": mColumn.ModificationDate = Convert.ToInt32(xnP.InnerText); break; case "a:Modifier": mColumn.Modifier = xnP.InnerText; break; case "a:Comment": mColumn.Comment = xnP.InnerText; break; case "a:DataType": mColumn.DataType= xnP.InnerText; break; case "a:Length": mColumn.Length= xnP.InnerText; break; case "a:Identity": mColumn.Identity = pgConvert.ConvertToBooleanPG(xnP.InnerText); break; case "a:Mandatory": mColumn.Mandatory = pgConvert.ConvertToBooleanPG(xnP.InnerText); break; case "a:PhysicalOptions": mColumn.PhysicalOptions= xnP.InnerText; break; case "a:ExtendedAttributesText": mColumn.ExtendedAttributesText= xnP.InnerText; break; } } return mColumn; } private PdmKey GetKey(XmlNode xnKey) { PdmKey mKey = new PdmKey(); XmlElement xe = (XmlElement)xnKey; mKey.KeyId = xe.GetAttribute("Id"); XmlNodeList xnKProperty = xe.ChildNodes; foreach (XmlNode xnP in xnKProperty) { switch (xnP.Name) { case "a:ObjectID": mKey.ObjectID = xnP.InnerText; break; case "a:Name": mKey.Name = xnP.InnerText; break; case "a:Code": mKey.Code = xnP.InnerText; break; case "a:CreationDate": mKey.CreationDate = Convert.ToInt32(xnP.InnerText); break; case "a:Creator": mKey.Creator = xnP.InnerText; break; case "a:ModificationDate": mKey.ModificationDate = Convert.ToInt32(xnP.InnerText); break; case "a:Modifier": mKey.Modifier = xnP.InnerText; break; //还差 <c:Key.Columns> } } return mKey; } } }使用方法：

PdmReader mTest = new PdmReader("D:\\piggy\\CodeTest.pdm"); mTest.InitData(); this.Text=Convert.ToString(mTest.Tables.Count);

上面是使用这个pdm读取器的一个应用，把读取出来的表数量列出来。这个读取器可能还有某些地方没有调整好，读取出来的表数量好像比实际的要多，有可能是快捷方式引用出来的表也算进去了。有空必须要完善一下才行。 

 由于这个pdm读取器只是初步成型，能够完成基本的相关表、字段、主键等的读取功能，由于时间与工作关系，还有更多的信息没有读取处理，在这，我开放给大家，希望大家能够不断地完善，并且希望完善的人可以把源码发给我补充上来。

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