EPPlus - 编写超过 26 列的 Excel 文件，C#/MVC

Question

我正在使用 EPPlus 在我的 MVC 项目中创建一个 Excel 文件。我想创建一个包含 30 列的电子表格。

使用我当前的代码，电子表格最多有 26 列（名为 A - Z）。我知道我需要更改范围以包括 AA - ZZ 列，但我不知道该怎么做。我应该用 int 来引用列吗？我在 GitHub 网站上没有看到任何这样的示例。

这是我的代码（Excel 数据来自数据表 (dt)）：

 //return dt;  
 using (ExcelPackage pck = new ExcelPackage())
  {
      //Create the worksheet
      ExcelWorksheet ws = pck.Workbook.Worksheets.Add("Claims");
      //Load the datatable into the sheet, starting from cell A1. Print the column names on row 1
                ws.Cells["A1"].LoadFromDataTable(dt, true);

                //prepare the range for the column headers
                string cellRange = "A1:" + Convert.ToChar('A' + dt.Columns.Count - 1) + 1;

                //Format the header for columns
                using (ExcelRange rng = ws.Cells[cellRange])
                {
                    rng.Style.WrapText = false;
                    rng.Style.HorizontalAlignment = ExcelHorizontalAlignment.Left;
                    rng.Style.Font.Bold = true;
                    rng.Style.Fill.PatternType = ExcelFillStyle.Solid; 
                    //Set Pattern for the background to Solid
                    rng.Style.Fill.BackgroundColor.SetColor(Color.Yellow);
                    rng.Style.Font.Color.SetColor(Color.Black);
                }

                //prepare the range for the rows
                string rowsCellRange = "A2:" + Convert.ToChar('A' + dt.Columns.Count - 1) + dt.Rows.Count * dt.Columns.Count;

                //Format the rows
                using (ExcelRange rng = ws.Cells[rowsCellRange])
                {
                    rng.Style.WrapText = true;
                    rng.Style.HorizontalAlignment = ExcelHorizontalAlignment.Left;
                }

               //Read the Excel file in a byte array
                Byte[] fileBytes = pck.GetAsByteArray();
                //Clear the response
                Response.Clear();
                Response.ClearContent();
                Response.ClearHeaders();
                Response.Cookies.Clear();
                //Add the header & other information 
                Response.Cache.SetCacheability(HttpCacheability.Private);
                Response.CacheControl = "private";
                Response.Charset = System.Text.UTF8Encoding.UTF8.WebName;
                Response.ContentEncoding = System.Text.UTF8Encoding.UTF8;
                Response.AddHeader("content-disposition", "attachment;filename=Claims.xlsx");
                Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
                //Write it back to the client
                Response.BinaryWrite(fileBytes);
                Response.End();
}

Answer 1

使用整数以方便使用。 格式："ws.Cells[row, column]"

使用此代码设置标题：

                using (var range = ws.Cells[1, 1, 1, 11])  //format: ws.Cells[int FromRow, int FromCol, int ToRow, int ToCol]
            {
                range.Style.Font.Bold = true;
                range.Style.ShrinkToFit = false;
                range.Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
                range.AutoFilter = true;
            }

Answer 2

首先，正如我在您的 cmets 中看到的那样，workSmarter 说您可以使用ws.Cells[row,col] 格式来寻址单元格。 但您也可以使用 EPPlus 在 Excel 中加载通用 IEnumerable (IEnumerable)。这是一种使用LoadFromCollection 方法在Excel 中编写通用IEnumerable 的方法。在此示例中，我使用反射基于 T 属性创建标题行：

public FileContentResult WriteToExcel<T>(IEnumerable<T> data, string fileName, bool shouldGenerateSumRow = true)
    {
        using (var package = new ExcelPackage())
        {

            var ws = package.Workbook.Worksheets.Add("گزارش");
            ws.View.RightToLeft = true;
            var props = TypeDescriptor.GetProperties(typeof(T));
            var RowCount = data.Count();

            ws.Cells.LoadFromCollection(data, true, OfficeOpenXml.Table.TableStyles.Medium27);
            ws.InsertRow(1, 1);
            var excelRange = ws.Cells[1, 1, 1, props.Count];
            ws.Row(1).Height = 80;

            excelRange.Merge = true;
            excelRange.Style.HorizontalAlignment = ExcelHorizontalAlignment.CenterContinuous;
            excelRange.Style.VerticalAlignment = ExcelVerticalAlignment.Center;
            excelRange.Style.WrapText = true;
            excelRange.Value = fileName;

            for (var i = 0; i < props.Count; i++)
            {
                ws.Cells[2, i + 1].Value = props[i].DisplayName;
            }


            ws.Cells.AutoFitColumns();

            var fcr = new FileContentResult(package.GetAsByteArray(),
                "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
            {
                FileDownloadName = $"{fileName}.xlsx"
            };
            return fcr;
        }
    }