（新手求指导）EF+MSSQL，弹出“更新条目时出错。有关详细信息，请参阅内部异常。”错误
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最佳答案
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这种情况一般是数据库那边出了问题，你可以查看更详细的异常信息就明白了
收获园豆：20
请问该如何查看那个异常信息，我用的是VS2015 Update3的版本
@孤独影: 你把SaveChanges保存操作放在try catch里面 出错之后再看具体excption
@JeffckyWang: 我catch后弹出一个异常信息为：
System.Data.Entity.Core.UpdateException: 更新条目时出错。有关详细信息，请参阅内部异常。 ---\u003e System.Data.SqlClient.SqlException: 将截断字符串或二进制数据。\r\n语句已终止。\r\n at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)\r\n at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)\r\n at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)\r\n at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean\u0026 dataReady)\r\n at System.Data.SqlClient.SqlDataReader.TryConsumeMetaData()\r\n at System.Data.SqlClient.SqlDataReader.get_MetaData()\r\n at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption)\r\n at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task\u0026 task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest)\r\n at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task\u0026 task, Boolean\u0026 usedCache, Boolean asyncWrite, Boolean inRetry)\r\n at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)\r\n at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)\r\n at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)\r\n at System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior)\r\n at System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.\u003cReader\u003eb__c(DbCommand t, DbCommandInterceptionContext`1 c)\r\n at System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TTarget,TInterceptionContext,TResult](TTarget target, Func`3 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed)\r\n at System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader(DbCommand command, DbCommandInterceptionContext interceptionContext)\r\n at System.Data.Entity.Internal.InterceptableDbCommand.ExecuteDbDataReader(CommandBehavior behavior)\r\n at System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior)\r\n at System.Data.Entity.Core.Mapping.Update.Internal.DynamicUpdateCommand.Execute(Dictionary`2 identifierValues, List`1 generatedValues)\r\n at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update()\r\n --- End of inner exception stack trace ---\r\n at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update()\r\n at System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.\u003cUpdate\u003eb__2(UpdateTranslator ut)\r\n at System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update[T](T noChangesResult, Func`2 updateFunction)\r\n at System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update()\r\n at System.Data.Entity.Core.Objects.ObjectContext.\u003cSaveChangesToStore\u003eb__35()\r\n at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)\r\n at System.Data.Entity.Core.Objects.ObjectContext.SaveChangesToStore(SaveOptions options, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction)\r\n at System.Data.Entity.Core.Objects.ObjectContext.\u003c\u003ec__DisplayClass2a.\u003cSaveChangesInternal\u003eb__27()\r\n at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)\r\n at System.Data.Entity.Core.Objects.ObjectContext.SaveChangesInternal(SaveOptions options, Boolean executeInExistingTransaction)\r\n at System.Data.Entity.Core.Objects.ObjectContext.SaveChanges(SaveOptions options)\r\n at System.Data.Entity.Internal.InternalContext.SaveChanges()"
里面提到“将截断字符串或二进制数据”，度娘了一下，说数据库长度不够，但是我的字段设置都是varchar类型的，不会是长度不够问题吧
@孤独影: 这都说的很清楚了大哥，你觉得呢
@JeffckyWang: 哦？应该怎么看这些异常信息呢？我不知道哪条是问题的所在？
@孤独影: 字符串长度超过
其他回答(1)
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请参阅内部异常 InnerException
请问这个InnerException是在哪里能看到的？
