Wrong style.xml

• Version=2.5.5.0
• Insert a new data column code into an existing excel file as follows

 var file = new FileStream(templatePath, FileMode.Open, FileAccess.Read);
 var workbook = new XSSFWorkbook(file);
 var sheet = workbook.GetSheetAt(0) as XSSFSheet;

• Error when opening the downloaded Report
• wrong styles.xml styles.txt

[lianglanzheng]

Maybe the empty family lable lead to this problem. I reproduced the problem when duplicate specific .xlsx by NPOI 2.5.5. I found that the problem is related to two XML files in the Excel archive:

• xl/styles.xml
• xl/sharedStrings.xml

Reproduce code:

using (FileStream iFile = new FileStream(Path, FileMode.Open, FileAccess.Read))
using (FileStream oFile = new FileStream(Path + ".out.xlsx", FileMode.Create, FileAccess.Write))
{
    XSSFWorkbook workbook = new XSSFWorkbook(iFile);
    workbook.Write(oFile);
    workbook.Close();
}

Original styles.xml file:

<fonts count="9">
    <font>
        <sz val="12" />
        <name val="宋体" />
        <family val="0" />
        <charset val="134" />
    </font>
...

NPOI generated:

<fonts count="9">
    <font>
        <sz val="12"/>
        <name val="宋体"/>
        <family/>
        <charset val="134"/>
    </font>
...

Microsoft Excel reported errors:

已删除的部件: 有 XML 错误的 /xl/styles.xml。 (样式) 加载错误。 行 1，列 0。
已修复的记录: /xl/worksheets/sheet1.xml 部分的 单元格信息
已修复的记录: /xl/worksheets/sheet2.xml 部分的 单元格信息

The error disappeared after I manually removed all <family/> in both xml files.

[luco5826]

When will this fix be released? Isn’t there a plan for NPOI version 2.5.7? Do we have to wait for 2.6.0 for this commit (b3ff43f) to be released?