Power Query - 拆分列错误值不能为空

Question

我有一列以 2 个数字开头，然后是字母。我想把它分成数字位和字符位。

当我这样做时：

    = Table.SplitColumn(#"Duplicated Column","FamilyCode - Copy",Splitter.SplitTextByPositions({0, 2}, false),{"FamilyCode - Copy.1", "FamilyCode - Copy.2"})

I get an error:

> Unexpected error: Value cannot be null.
Parameter name: source
Details:
    Microsoft.Mashup.Evaluator.Interface.ErrorException: Value cannot be null.
Parameter name: source ---> Microsoft.Mashup.Evaluator.Interface.ErrorException: Value cannot be null.
Parameter name: source ---> System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source, Func`2 predicate)
   at Microsoft.Mashup.Engine1.Library.Odbc.OdbcQuery.AddColumns(ColumnsConstructor columnGenerator)
   at Microsoft.Mashup.Engine1.Runtime.OptimizingQueryVisitor.VisitQuery(Query query, Func`2 operation)
   at Microsoft.Mashup.Engine1.Runtime.OptimizingQueryVisitor.VisitQuery(Query query)
   at Microsoft.Mashup.Engine1.Runtime.OptimizingQueryVisitor.VisitQuery(Query query, Func`2 operation)
   at Microsoft.Mashup.Engine1.Runtime.OptimizingQueryVisitor.VisitQuery(Query query)
   at Microsoft.Mashup.Engine1.Runtime.OptimizingQueryVisitor.VisitQuery(Query query, Func`2 operation)
   at Microsoft.Mashup.Engine1.Runtime.OptimizingQueryVisitor.VisitQuery(Query query)
   at Microsoft.Mashup.Engine1.Runtime.OptimizingQueryVisitor.VisitQuery(Query query, Func`2 operation)
   at Microsoft.Mashup.Engine1.Runtime.OptimizingQueryVisitor.VisitQuery(Query query)
   at Microsoft.Mashup.Engine1.Runtime.OptimizingQueryVisitor.Optimize(Query query)
   at Microsoft.Mashup.Engine1.Language.Query.QueryTableValue.get_OptimizedQuery()
   at Microsoft.Mashup.Engine1.Language.Query.QueryTableValue.GetEnumerator()
   at Microsoft.Mashup.Engine1.Runtime.TableValue.Microsoft.Mashup.Engine.Interface.ITableValue.GetEnumerator()
   at Microsoft.Mashup.Evaluator.SimpleDocumentEvaluator.ValuePreviewValueSource.TableValuePreviewValueSource.SerializeRows(Int32 count)
   at Microsoft.Mashup.Evaluator.SimpleDocumentEvaluator.ValuePreviewValueSource.TableValuePreviewValueSource.get_SmallValue()
   at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.<>c__DisplayClass5.<RunStub>b__3()
   at Microsoft.Mashup.Evaluator.EvaluationHost.ReportExceptions(IHostTrace trace, IEngineHost engineHost, IMessageChannel channel, Action action)
   --- End of inner exception stack trace ---
   at Microsoft.Mashup.Evaluator.EvaluationHost.<>c__DisplayClass7.<TryReportException>b__6()
   at Microsoft.Mashup.Common.SafeExceptions.IgnoreSafeExceptions(IHostTrace trace, Action action)
   at Microsoft.Mashup.Evaluator.EvaluationHost.TryReportException(IHostTrace trace, IEngineHost engineHost, IMessageChannel channel, Exception exception)
   at Microsoft.Mashup.Evaluator.EvaluationHost.ReportExceptions(IHostTrace trace, IEngineHost engineHost, IMessageChannel channel, Action action)
   at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.RunStub(IEngineHost engineHost, IMessageChannel channel, Func`1 getPreviewValueSource)
   at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.<>c__DisplayClass32`1.<OnBeginGetResult>b__2f()
   at Microsoft.Mashup.Evaluator.EvaluationHost.ReportExceptions(IHostTrace trace, IEngineHost engineHost, IMessageChannel channel, Action action)
   at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetResult[T](IMessageChannel channel, BeginGetResultMessage message, Action`1 action)
   at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetPreviewValueSource(IMessageChannel channel, BeginGetPreviewValueSourceMessage message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.OnMessageWithUnknownChannel(IMessageChannel baseChannel, MessageWithUnknownChannel messageWithUnknownChannel)
   at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.EvaluationHost.Run()
   at Microsoft.Mashup.Container.EvaluationContainerMain.Run(Object args)
   at Microsoft.Mashup.Evaluator.SafeThread2.<>c__DisplayClass15.<CreateAction>b__14(Object o)
   at Microsoft.Mashup.Container.EvaluationContainerMain.SafeRun(String[] args)
   at Microsoft.Mashup.Container.EvaluationContainerMain.Main(String[] args)
   --- End of inner exception stack trace ---
   at Microsoft.Mashup.Evaluator.EvaluationHost.OnException(IEngineHost engineHost, IMessageChannel channel, ExceptionMessage message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.Interface.IMessageChannelExtensions.WaitFor[T](IMessageChannel channel)
   at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.PreviewValueSource.WaitFor(Func`1 condition, Boolean disposing)
   at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.PreviewValueSource.get_SmallValue()
   at Microsoft.Mashup.Host.Document.Analysis.PackageDocumentAnalysisInfo.PackagePartitionAnalysisInfo.SetPreviewValue(EvaluationResult2`1 result, Func`1 getStaleSince, Func`1 getSampled

我仔细检查了该列，每一行都有一个条目，没有空行，也没有少于两个字符的行（最少 5 到 10 个字符）

有人知道吗？

Excel 2016

谢谢

Answer 1

这里有一个更健壮的方法，它不关心每个字符串开头有多少位数字（可以是none）：

删除重复的列步骤。

然后添加一个名为 FamilyCode Number 的自定义列

= Text.SplitAny( Text.Lower ( [FamilyCode] ) , Text.Combine ( {"a".."z"} ) ){0})

然后添加另一个自定义列以获取 [FamilyCode] 的文本部分

= Text.End ( Text.From ( [FamilyCode] ) , Text.Length( [FamilyCode] ) - Text.Length ( [FamilyCode Number] ) )

向在此发表博客的 Ken Puls 致敬：

http://www.excelguru.ca/blog/2015/12/02/separate-values-and-text-part-2/

Power Query - 拆分列错误值不能为空

Power Query - Split Column Error value cannot be null

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