Generated Excel documents starts with SheetId:2 and r:Id 2

Do you want to request a feature or report a bug?

• Bug
• Feature
• Question

Did you test against the latest CI build?

• Yes
• No

What is the current behavior?

SheetId and r:id starts at 2 instead of 1.

What is the expected behavior or new feature?

SheetId and r:id should start at 1.

Reproducibility

Code to reproduce problem:

public void Main()
{
   var workBook = new XLWorkbook();

    workBook.AddWorksheet("Sheet1");
    workBook.AddWorksheet("Sheet2");
    workBook.SaveAs("Testxml.xlsx");
}

• I attached a sample spreadsheet. (You can drag files on to this issue) Testxml.xlsx

[jahav]

Hi, the r:id is a relationship id between individual parts of xlsx (actually [Open Packaging Conventions or ECMA-376 part 2])https://en.wikipedia.org/wiki/Open_Packaging_Conventions)).

The identifier is an implementation detail and could be anything, like guid (see example value from spect below) or something like that. You shouldn’t expect values to be of any specific format. ClosedXml is using a sequential generator for ids and the rId1 is used for relationship to app.xml part. While uniqueness necessary only locally per part, it’s just more convenient to have them unique globally.

ECMA-376 part 2 - 6.5.3.4 Attributes Id This attribute specifies the identifier of a relationship. The value of the Id attribute shall be unique within the Relationships part. This attribute is required. EXAMPLE 2 Id=“A5FFC797514BC”

SheetId is pretty much same, an implementation detail (in ClosedXml case, number is same as relationship id) that is generated by an algorithm that can change at any time.

@thommelutten Why do you need to look at the individual values? In any case, don’t rely on the ids to be generated sequentially or anything outside of spec requirements for id.

[thommelutten]

As a novice I’d assume the SheetId was 1, since ws1 is deleted before adding Sheet2? I’m guessing workBook does not contain a history of previously added sheets.