Since last week we are using an new version of infragistics 2014.1, before we've used infragistics  2010.1.
Our software is build for europe purposes and we are using specific kind of format strings.
Before the update the format strings we're build up as followed:

 private void ultraGridExcelExporter_InitializeColumn(object sender, Infragistics.Win.UltraWinGrid.ExcelExport.InitializeColumnEventArgs e)
         {
              //Adds a currency in excel
              if (e.Column.Format == "C" || e.Column.Style == Infragistics.Win.UltraWinGrid.ColumnStyle.Currency)
              {
                e.ExcelFormatStr = "€ ###,###,##0.00";
               }
              else if ((e.Column.MaskInput ?? "").Contains("%"))
              {
                  e.ExcelFormatStr = "0.##";
              }
         }

Our grid:


In the Excel export was the following format string attached to the column:



Now with the new infragistics the format string is build up wrong:




We think this is due to the new version of Infragistics because we didn't change the code.
We already tried to set the formatinfo of the column to the dutch cultureinfo but this didn't help:
private void ultraGridExcelExporter1_InitializeColumn(object sender, Infragistics.Win.UltraWinGrid.ExcelExport.InitializeColumnEventArgs e)
        {
            //Adds a currency in excel
            if (e.Column.Format == "C" || e.Column.Style == Infragistics.Win.UltraWinGrid.ColumnStyle.Currency)
            {
                e.ExcelFormatStr = "€ ###,###,##0.00";
                e.Column.FormatInfo = new System.Globalization.CultureInfo("NL-nl");
            }
            else if ((e.Column.MaskInput ?? "").Contains("%"))
            {
                e.ExcelFormatStr = "0.##";
            }
        }