Question

我们随机获得此异常，而谷歌搜索我发现这可能是由于框架问题...像服务包和所有....

以下是触发/执行LINQ TO SQL查询的通用函数

Public Shared Function Find(Of T As ActiveRecordBase)(ByVal id As Object) As ActiveRecordBase

        Dim tableMetaData As MetaTable = GetTableMetadata(Of T)()

        Dim sql As String = String.Format("SELECT * FROM {0} WITH (NOLOCK) WHERE {1} = ?", tableMetaData.TableName, GetPrimaryKeyName(Of T))
        sql = sql.Replace("?", "{0}")

        Return UnitOfWork.Current.ExecuteQuery(Of T)(sql, id).FirstOrDefault()
  End Function

这是调用它的函数......

Public Shared Shadows Function Find(ByVal id As Integer) As Project
        Return CType(ActiveRecordBase.Find(Of Project)(id), Project)

End Function

抛出异常 System.InvalidOperationException：结果中不存在必需的列'project_nbr'。 at System.Data.Linq.SqlClient.ObjectReaderCompiler.ObjectReaderBase 1.GetColumnOrdinals(NamedColumn[] namedColumns) at System.Data.Linq.SqlClient.ObjectReaderCompiler.ObjectReaderBase 1..ctor（ObjectReaderSession 1 session, NamedColumn[] namedColumns, Object[] globals, Object[] arguments, Int32 nLocals) at System.Data.Linq.SqlClient.ObjectReaderCompiler.ObjectReaderSession 1.CreateReader [TObject]（Func 2 fnMaterialize, NamedColumn[] namedColumns, Object[] globals, Int32 nLocals, Boolean disposeDataReader) at System.Data.Linq.SqlClient.ObjectReaderCompiler.ObjectReaderFactory 2.Create（DbDataReader dataReader，Boolean disposeDataReader ，IReaderProvider提供程序，Object [] parentArgs，Object [] userArgs，ICompiledSubQuery [] subQueries） at System.Data.Linq.SqlClient.SqlProvider.Execute（Expression query，QueryInfo queryInfo，IObjectReaderFactory factory，Object [] parentArgs，Object [] userArgs，ICompiledSubQuery [] subQueries，Object lastResult） at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll（Expression query，QueryInfo [] queryInfos，IObjectReaderFactory factory，Object [] userArguments，ICompiledSubQuery [] subQueries） at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute（Expression query） at System.Data.Linq.DataContext.ExecuteMethodCall（Object instance，MethodInfo methodInfo，Object [] parameters） at System.Data.Linq.DataContext.ExecuteQuery [TResult]（String query，Object [] parameters） at GeneralMills.P2.ProjectTracking.Domain.ActiveRecordBase.Find [T]（Object id）在GeneralMills.P2.ProjectTracking.Domain.Project.Find（Int32 id） at GeneralMills.P2.ProjectTracking.Web.ProjectContext.GetCurrentDomainObject（Int32 key）在GeneralMills.P2.ProjectTracking.Web.ContextBase.GetCurrentItem（）在GeneralMills.P2.ProjectTracking.Web.BaseContextPage.OnLoad（EventArgs e）

System.InvalidOperationException：结果中不存在必需的列'project_nbr'

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