使用C＃在excel中将一列的所有行创建为下拉列表

Question

我的要求是导出具有5列的空白excel工作表，其中所有行的第3列作为下拉列表，以便用户可以根据需要使用此工作表来修改数据。 我正在使用C＃导出文件。

我已经在处理它，但目前，它仅在特定单元格中创建一个下拉列表，但我想将第一列的所有行都作为下拉列表。

我正在使用gembox电子表格创建excel文件。

以下是我正在使用的代码：

        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY");
        ExcelFile ef = new ExcelFile();
        ExcelWorksheet ws = ef.Worksheets.Add("Journal Entry Format");

        ws.Columns[0].Width = 30 * 256;
        ws.Columns[1].Width = 30 * 256;
        ws.Columns[2].Width = 30 * 256;
        ws.Columns[3].Width = 30 * 256;
        ws.Columns[4].Width = 30 * 256;
        ws.Columns[5].Width = 30 * 256;
        ws.Columns[6].Width = 30 * 256;

        CellStyle tmpStyle2 = new CellStyle();
        tmpStyle2.HorizontalAlignment = HorizontalAlignmentStyle.Center;
        tmpStyle2.VerticalAlignment = VerticalAlignmentStyle.Center;
        tmpStyle2.FillPattern.SetSolid(System.Drawing.Color.Yellow);
        ws.Cells.GetSubrangeAbsolute(0, 0, 1, 5).Style = tmpStyle2;
        ws.Cells[1, 0].Value = "Last";
        ws.Cells.GetSubrangeAbsolute(1, 0, 1, 5).Merged = true;

        CellStyle tmpStyle1 = new CellStyle();
        tmpStyle1.HorizontalAlignment = HorizontalAlignmentStyle.Center;
        tmpStyle1.VerticalAlignment = VerticalAlignmentStyle.Center;
        tmpStyle1.FillPattern.SetSolid(System.Drawing.Color.Blue);
        tmpStyle1.Font.Weight = ExcelFont.BoldWeight;
        tmpStyle1.Font.Color = System.Drawing.Color.White;
        tmpStyle1.WrapText = true;

        ws.Cells[3, 0].Value = "Voucher Date";
        ws.Cells[3, 1].Value = "Voucher No.";
        ws.Cells[3, 2].Value = "Select Ledger";
        ws.Cells[3, 3].Value = "Debit/Credit";
        ws.Cells[3, 4].Value = "Amount";
        ws.Cells[3, 5].Value = "Narration";
        ws.Cells.GetSubrangeAbsolute(3, 0, 3, 5).Style = tmpStyle1;

        var list = new List<string>();
        foreach (var led in ledgers)
        {
            list.Add(led.AccountHead);
        }

        var flatList = string.Join(",", list.ToArray());

        for (int i = 3; i < 100; ++i)
        {
            DataValidation dv = new DataValidation();
            dv.InCellDropdown = true;
            dv.InputMessage = "Select Ledger";
            dv.Formula1 = flatList;
            ws.DataValidations.Add(dv);

            ws.Columns[2].Cells[i + 1].Value = dv.Formula1;
        }

        ws.PrintOptions.FitWorksheetWidthToPages = 1;
        ef.Save(this.Response, "JournalEntry Format" + ".xlsx");

Answer 1

这是将第3列单元格设置为下拉列表的方法：

var flatList = string.Join(",", list.ToArray());

DataValidation dv = new DataValidation(ws.Columns[2].Cells);
dv.Type = DataValidationType.List;
dv.InputMessage = "Select Ledger";
dv.Formula1 = flatList;

ws.DataValidations.Add(dv);