添加新的 sheet 到 Excel 工作簿以在行限制 > 1M 时存储数据

Question

我正在尝试使用 Spire.Xls 将一些数据存储到 excel 文件中。

将多个文件中的数据复制到另一个 excel 文件的第一个 sheet 时，我想 创建一个新的 excel sheet 当到达 行 = 1,048,575 时，将数据粘贴到这个新的 sheet 中。这是我的代码：

        Workbook tempbook = new Workbook();
        tempbook.LoadFromFile(PathToSecondFile);

        Workbook workbook = new Workbook();
        workbook.LoadFromFile(PathToFirstFile);

        //import the second workbook's worksheet into the first workbook using a datatable
        Worksheet sheet2 = tempbook.Worksheets[0];
        //copy data from sheet2 into a datatable
        DataTable dataTable = sheet2.ExportDataTable();
        //load sheet1
        Worksheet sheet1 = workbook.Worksheets[0];

        var c1 = sheet1.LastRow;
        var c2 = sheet2.LastRow;

        if (c1 >= 1048575 || c2 >= 1048575 || (c1 + c2) >= 1048575)
        {
             //create a new worksheet and append data into it but
             //at this line getting Index out of bound exception   
             Worksheet sheet3 = workbook.Worksheets.Add("NewSheet");
             sheet3.InsertDataTable(dataTable, false, sheet3.LastRow + 1, 1);
        }
        else
        {
             sheet1.InsertDataTable(dataTable, false, sheet1.LastRow + 1, 1);
        }
  }

即使代码超越异常，数据也保存到sheet2，但是到sheet1的数据不保存。欢迎所有建议。提前致谢。

Answer 1

是否可以切换到 Excel 2007+ 格式？通过这种方式，您可以找到很多 excel 的提供程序，例如 Apache poi、Spreadsheet Light。

Answer 2

实际上这很简单...有点解决方法就完成了任务。所以这是代码：

int c1 = workbook.ActiveSheet.LastRow, c2 = tempbook.Worksheets[0].LastRow;

if ((c1 + c2) <= 1048575)
{
    //import the second workbook's worksheet into the first workbook using a datatable
    //load 1st sheet of tempbook into sheet
    Worksheet sheet = tempbook.Worksheets[0];
    //copy data from sheet into a datatable
    DataTable dataTable = sheet.ExportDataTable();
    //load sheet1
    Worksheet sheet1 = workbook.Worksheets[workbook.ActiveSheetIndex];
    sheet1.InsertDataTable(dataTable, false, sheet1.LastRow + 1, 1);
}
else if ((c1 >= 1048575 && c2 >= 1048575) || c1 >= 1048575 || c2 >= 1048575 || (c1 + c2) >= 1048575)
{
    workbook.Worksheets.AddCopy(tempbook.Worksheets[0]);
    indx = workbook.ActiveSheet.Index;
    workbook.ActiveSheetIndex = ++indx;
}
else
{
    //import the second workbook's worksheet into the first workbook using a datatable
    //load 1st sheet of tempbook into sheet
    Worksheet sheet = tempbook.Worksheets[0];
    //copy data from sheet into a datatable
    DataTable dataTable = sheet.ExportDataTable();
    //load sheet1
    Worksheet sheet1 = workbook.Worksheets[workbook.ActiveSheetIndex];
    sheet1.InsertDataTable(dataTable, false, sheet1.LastRow + 1, 1);
}

显然，if 和 else 块代码是相同的。但也想不出别的了。欢迎修改。

添加新的 sheet 到 Excel 工作簿以在行限制 > 1M 时存储数据

Add new sheet to Excel workbook to store data when row limit > 1M

c#

excel-2016

spire.xls