Javascript 在Office Web上运行Excel加载项时出现名称范围问题

在Excel外接程序中添加命名范围时，我偶尔会遇到ItemAlreadyExists异常，而且只有在浏览器（而不是桌面）中运行Excel时才会出现此异常

代码非常简单。对于每个工作表，我添加一个名为“rulescape_id”的命名范围。这应该是工作表的范围，按照

例外情况详情：

{"code":"ItemAlreadyExists","message":"A resource with the same name or identifier already exists.","errorLocation":"NamedItemCollection.add","statement":"var add=names.add(...);","surroundingStatements":["...","// Instantiate {rowsBelow}","var workbook=context.workbook;","var worksheets=workbook.worksheets;","var worksheet=worksheets.getItem(...) /* originally getItem(...) */;","var names=worksheet.names;","// >>>>>","var add=names.add(...);","// <<<<<","var v1=context.workbook._getObjectByReferenceId(\"R!{210136D6-71B5-4BF2-BEA0-9CBDA9AA57D1}!{C06F41B8-B778-4030-8D38-51BBA2FD9FAF}\") /* originally find(...) */;","var rowsBelow1=v1.getRowsBelow(...);","// Instantiate {rowsBelow1}","var worksheet1=worksheets.getItem(...) /* originally getItem(...) */;","var names1=worksheet1.names;","..."],"fullStatements":["var v=context.workbook._getObjectByReferenceId(\"R!{55F88602-7FD7-4AD4-A8D6-1B8578F08275}!{C06F41B8-B778-4030-8D38-51BBA2FD9FAF}\") /* originally find(\"_header\", {\"completeMatch\":true,\"matchCase\":true,\"searchDirection\":\"Forward\"}) */;","var rowsBelow=v.getRowsBelow(106);","// Instantiate {rowsBelow}","var workbook=context.workbook;","var worksheets=workbook.worksheets;","var worksheet=worksheets.getItem(\"{00000000-0001-0000-1000-000000000000}\") /* originally getItem(\"transaction fee data\") */;","var names=worksheet.names;","var add=names.add(\"rulescape_ids\", rowsBelow, undefined);","var v1=context.workbook._getObjectByReferenceId(\"R!{210136D6-71B5-4BF2-BEA0-9CBDA9AA57D1}!{C06F41B8-B778-4030-8D38-51BBA2FD9FAF}\") /* originally find(\"_header\", {\"completeMatch\":true,\"matchCase\":true,\"searchDirection\":\"Forward\"}) */;","var rowsBelow1=v1.getRowsBelow(112);","// Instantiate {rowsBelow1}","var worksheet1=worksheets.getItem(\"{00000000-0001-0000-0B00-000000000000}\") /* originally getItem(\"loan data\") */;","var names1=worksheet1.names;","var add1=names1.add(\"rulescape_ids\", rowsBelow1, undefined);","var v2=context.workbook._getObjectByReferenceId(\"R!{C1D50634-EBC2-4DDB-9D0F-494CB24980D8}!{C06F41B8-B778-4030-8D38-51BBA2FD9FAF}\") /* originally find(\"_header\", {\"completeMatch\":true,\"matchCase\":true,\"searchDirection\":\"Forward\"}) */;"...

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{“code”：“ItemAlreadyExists”，“message”：“已存在具有相同名称或标识符的资源”。，“errorLocation”：“NamedItemCollection.add”，“语句”：“var add=names.add（…）；”，“surroundingStatements”：[“…”，“//实例化{rowsBelow}”，“var workbook=context.workbook；”，，“var worksheets=workbook.worksheets；”，“var工作表=工作表.getItem（…）/*原始getItem（…）*/；”，“var名称=工作表.names；”，“/>>”，“var添加=名称.添加（…）；”，”//我发现您的代码存在一个问题，即它没有正确使用
getItemOrNullObject
方法。在测试空值之前，您必须在调用此方法后执行context.sync。此外，您也不会使用
if（namedItemRange）
测试空值。您可以使用
if（namedItemRange.isNullObject）进行测试
。有关详细信息，请参阅。我不知道这是否能解决您的问题，但您仍然需要进行修复，而且可能会停止错误。
谢谢您的回复，Rick。在实施您的建议后，我仍然会收到错误。我是否还需要在namedRangeItem.delete（）之后和sheet.names.add（…）之前进行同步？请提供更多的代码。我们需要查看您的
这
是什么。此外，我们还需要查看整个
Excel.run（）
。感谢您提供查看代码的机会。代码跨越多个稍大的类。我将尝试将其精简到本质并发送摘录。
{"code":"ItemAlreadyExists","message":"A resource with the same name or identifier already exists.","errorLocation":"NamedItemCollection.add","statement":"var add=names.add(...);","surroundingStatements":["...","// Instantiate {rowsBelow}","var workbook=context.workbook;","var worksheets=workbook.worksheets;","var worksheet=worksheets.getItem(...) /* originally getItem(...) */;","var names=worksheet.names;","// >>>>>","var add=names.add(...);","// <<<<<","var v1=context.workbook._getObjectByReferenceId(\"R!{210136D6-71B5-4BF2-BEA0-9CBDA9AA57D1}!{C06F41B8-B778-4030-8D38-51BBA2FD9FAF}\") /* originally find(...) */;","var rowsBelow1=v1.getRowsBelow(...);","// Instantiate {rowsBelow1}","var worksheet1=worksheets.getItem(...) /* originally getItem(...) */;","var names1=worksheet1.names;","..."],"fullStatements":["var v=context.workbook._getObjectByReferenceId(\"R!{55F88602-7FD7-4AD4-A8D6-1B8578F08275}!{C06F41B8-B778-4030-8D38-51BBA2FD9FAF}\") /* originally find(\"_header\", {\"completeMatch\":true,\"matchCase\":true,\"searchDirection\":\"Forward\"}) */;","var rowsBelow=v.getRowsBelow(106);","// Instantiate {rowsBelow}","var workbook=context.workbook;","var worksheets=workbook.worksheets;","var worksheet=worksheets.getItem(\"{00000000-0001-0000-1000-000000000000}\") /* originally getItem(\"transaction fee data\") */;","var names=worksheet.names;","var add=names.add(\"rulescape_ids\", rowsBelow, undefined);","var v1=context.workbook._getObjectByReferenceId(\"R!{210136D6-71B5-4BF2-BEA0-9CBDA9AA57D1}!{C06F41B8-B778-4030-8D38-51BBA2FD9FAF}\") /* originally find(\"_header\", {\"completeMatch\":true,\"matchCase\":true,\"searchDirection\":\"Forward\"}) */;","var rowsBelow1=v1.getRowsBelow(112);","// Instantiate {rowsBelow1}","var worksheet1=worksheets.getItem(\"{00000000-0001-0000-0B00-000000000000}\") /* originally getItem(\"loan data\") */;","var names1=worksheet1.names;","var add1=names1.add(\"rulescape_ids\", rowsBelow1, undefined);","var v2=context.workbook._getObjectByReferenceId(\"R!{C1D50634-EBC2-4DDB-9D0F-494CB24980D8}!{C06F41B8-B778-4030-8D38-51BBA2FD9FAF}\") /* originally find(\"_header\", {\"completeMatch\":true,\"matchCase\":true,\"searchDirection\":\"Forward\"}) */;"...