Question

感谢您的帮助，我得到了一个例外：保存文件C：\ U .....时出错 {＆＃34;对象引用未设置为对象的实例。＆＃34;}

堆栈跟踪：在OfficeOpenXml.ExcelPackage.Save（）在MINAG.SMEA.Business.ExcelBusinessService.CreateTableExcel（Decimal surveyId）的c：\ Users \ luciano \ Desktop \ New folder \ implementation \ MINAG.SMEA.Business \ ExcelBusinessService.cs：line 2048

（仅限堆栈跟踪）

我目前的代码是：

FileInfo newFile = new FileInfo(file);
                ExcelPackage excPck = new ExcelPackage(newFile);

                foreach (SURVEY_BASE_TABLE_LIST item in survey.SURVEY_BASE_TABLE_LIST)
                {
                    BASE_TABLE_LIST table = item.BASE_TABLE_LIST;
                    Int32 limit = table.CODE.Length;
                    if (limit > 31)
                        limit = 31;
                    string dynamicRangeFormula = "OFFSET('" + table.CODE.Substring(0, limit) + "'!$A$1;0;0;COUNTA('" + table.CODE.Substring(0, limit) + "'!$A$1:$A$1000)+1;COUNTA('" + table.CODE.Substring(0, limit) + "'!$1:$1))";
                    var ws = excPck.Workbook.Worksheets.Add("Pivot_" + table.CODE);
                    ExcelNamedRange newRange = new ExcelNamedRange(table.CODE.Substring(0, limit), null, ws, "C3", excPck.Workbook.Names.Count)
                        {
                            Formula = dynamicRangeFormula
                        };

                    var excelPivot = ws.PivotTables.Add(ws.Cells["A1"], newRange, "Pivot_" + table.CODE);



                }
                excPck.Save();

有什么想法吗？

Answer 1

要构建一个新的范围，您希望ExcelNamedRange具有公共构造函数而不是ExcelRange。所以像这样的东西会给你一个新的命名范围，其中包含一个公式：

var ws = excPck.Workbook.Worksheets.Add("Pivot_" + table.CODE);
var newRange = new ExcelNamedRange("NewRange", null, ws, "C3", excPck.Workbook.Names.Count)
{
    Formula = "SUM(A1:A4)"
};
excPck.Workbook.Names.Add(table.CODE, newRange);

EPPLUS动态命名范围

1 个答案: