最近在使用WCF DataService 正好看到一篇文章 大概翻译一下http://blogs.msdn.com/b/phaniraj/archive/2008/06/18/debugging-ado-net-data-services.aspx
在使用WCF DataService进行开发时，有时会遇到一些问题
比如
<?xml version="1.0" encoding="utf-8" standalone="yes"?> <error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"> <code></code> <message xml:lang="en-US">An error occurred while processing this request.</message> </error>
但是这种笼统的错误提示 显然对于调试毫无帮助 所以我们需要更多的调试选项
1)在ServiceConfigruation中 将UserVerboseErrors设为true
代码如下
public class YoruService : DataService<YourProvider> { public static void InitializeService(IDataServiceConfiguration config) { config.UseVerboseErrors = true; . . . . . . } ...... }
这样你可能会看到这样的错误提示：
<?xml version="1.0" encoding="utf-8" standalone="yes"?> <error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"> <code></code> <message xml:lang="en-US">An error occurred while processing this request.</message> <innererror xmlns="xmlns"> <message>An error occurred while updating the entries. See the InnerException for details.</message> <type>System.Data.UpdateException</type> <stacktrace> at System.Data.Mapping.Update.Internal.UpdateTranslator.Update(IEntityStateManager stateManager, IEntityAdapter adapter)
 at System.Data.Objects.ObjectContext.SaveChanges(Boolean acceptChangesDuringSave)
 at System.Data.Services.Providers.ObjectContextServiceProvider.SaveChanges()
 at System.Data.Services.DataService`1.HandleNonBatchRequest(RequestDescription description)
 at System.Data.Services.DataService`1.HandleRequest()</stacktrace> <internalexception> <message>Violation of PRIMARY KEY constraint ‘PK_Region‘. Cannot insert duplicate key in object ‘dbo.Region‘.
 The statement has been terminated.</message> <type>System.Data.SqlClient.SqlException</type> <stacktrace> at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
 at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
 at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
 at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
 at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
 at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
 at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe)
 at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
 at System.Data.Mapping.Update.Internal.DynamicUpdateCommand.Execute(UpdateTranslator translator, EntityConnection connection, Dictionary`2 identifierValues, List`1 generatedValues)
 at System.Data.Mapping.Update.Internal.UpdateTranslator.Update(IEntityStateManager stateManager, IEntityAdapter adapter)</stacktrace> </internalexception> </innererror> </error>
但是如果服务都无法启动，提示信息可能如下
说明WCF DataService 完全没有启动 为了看到更多错误信息
2）在ServiceBehavior中设置 IncludeExceptionDetailInFaults属性
Via Code :
[System.ServiceModel.ServiceBehavior(IncludeExceptionDetailInFaults = true)]
public class YourService : DataService<YourProvider>
Via Config :
<system.serviceModel> <services> <service name="ServiceNamespace.ServiceClassName" behaviorConfiguration ="DebugEnabled"> </service> </services> <behaviors> <serviceBehaviors > <behavior name="DebugEnabled"> <serviceDebug includeExceptionDetailInFaults="True"/> </behavior> </serviceBehaviors> </behaviors> <serviceHostingEnvironment aspNetCompatibilityEnabled="true"/> </system.serviceModel>
这样一来 错误提示就会变成
原文：http://www.cnblogs.com/Mistlion-alex/p/4372598.html