如何下载带有样式的excel文件？

Question

我正在尝试将样式添加到 Excel 文件，然后下载它，该文件与数据一起下载，但样式不存在。有人可以帮我解决我失踪的任何事情吗？

            IApplication application = excelEngine.Excel;
            application.DefaultVersion = ExcelVersion.Excel2016;
            IWorkbook workbook = application.Workbooks.Create(1);
            IWorksheet namedSheet = workbook.Worksheets[0];
            namedSheet.Range["A1"].Text = "CustomerID";       
            namedSheet.Range["B1"].Text = "CompanyName";
            IStyle bodyStyle = workbook.Styles.Add("BodyStyle");
            bodyStyle.BeginUpdate();
            bodyStyle.Color = System.Drawing.Color.FromArgb(15, 19, 22);
            bodyStyle.EndUpdate();
            IStyle headerStyle = workbook.Styles.Add("HeaderStyle");
            headerStyle.BeginUpdate();
            headerStyle.Color = System.Drawing.Color.FromArgb(255, 174, 33);
            headerStyle.EndUpdate();
            namedSheet.Range["A10"].CellStyleName = "BodyStyle";
            namedSheet.Range["A1"].CellStyleName = "HeaderStyle";
            HttpContext.Response.ContentType = "application/vnd.ms-excel";
            MemoryStream ms = new MemoryStream();
            string separator = ",";                      //delimeter
            workbook.SaveAs(ms, separator);
            ms.Flush();
            byte[] bytes = ms.ToArray();
            ms.Close();
            Response.Clear();
            Response.AddHeader("Content-Disposition", "attachment; filename=foo.xls");
            Response.AddHeader("Content-Type", "application/vnd.ms-excel");        Response.ContentType = "application/octet-stream";
            Response.BinaryWrite(bytes);
            Response.Write(Response.Output);
        }

下载的文件中只显示excel数据，不显示样式。

Answer 1

样式未保存在文件中的原因是您没有使用正确的 SyncFusion API。 您需要使用 style.BeginUpdate() 和 style.EndUpdate() 方法来保持样式！

例如：

    IStyle style = workbook.Styles.Add("style1");
    style.BeginUpdate();
    style.FillPattern = ExcelPattern.Gradient;
    style.Interior.Gradient.GradientStyle = ExcelGradientStyle.Vertical;
    style.Interior.Gradient.BackColor = Color.Black;
    style.Interior.Gradient.ForeColor = Color.Beige;
    //Apply style to range of cells
    namedSheet.Range["A10"].CellStyleName = "style1";
    style.EndUpdate();
    workbook.SaveAs(@"c:\temp\test.xlsx");

    workbook.Close();
    excelEngine.Dispose();

Answer 2

using GemBox.Spreadsheet;

.....

 worksheet.Cells[row += x, y].Value = ".Style.Font.Color =";
 worksheet.Cells[row, x].Value = "Color.Blue";
 worksheet.Cells[row, x].Style.Font.Color = SpreadsheetColor.FromName(ColorName.Blue);

 worksheet.Cells[row += x, y].Value = ".Style.Font.Italic =";
 worksheet.Cells[row, x].Value = "true";
 worksheet.Cells[row, x].Style.Font.Italic = true;

 worksheet.Cells[row += x, y].Value = ".Style.Font.Name =";
 worksheet.Cells[row, x].Value = "Comic Sans MS";
 worksheet.Cells[row, x].Style.Font.Name = "Comic Sans MS";

 worksheet.Cells[row += x, y].Value = ".Style.Font.Size =";
 worksheet.Cells[row, x].Value = "18 * 20";
 worksheet.Cells[row, x].Style.Font.Size = 18 * 20;

Answer 3

CSV 是由逗号 (,) 分隔的纯文本，并且没有附加任何样式。当您将任何样式应用于单元格并将文件另存为 CSV 时，不会保留样式。这是 Microsoft Excel 的行为。我们已修改您的代码以生成保存应用样式的 xlsx 文件。请在下面找到更新后的代码。

using (ExcelEngine excelEngine = new ExcelEngine())
            {
                IApplication application = excelEngine.Excel;
                application.DefaultVersion = ExcelVersion.Excel2016;
                IWorkbook workbook = application.Workbooks.Create(1);
                IWorksheet namedSheet = workbook.Worksheets[0];
                namedSheet.Range["A1"].Text = "CustomerID";
                namedSheet.Range["B1"].Text = "CompanyName";
                IStyle bodyStyle = workbook.Styles.Add("BodyStyle");
                bodyStyle.BeginUpdate();
                bodyStyle.Color = System.Drawing.Color.FromArgb(15, 19, 22);
                bodyStyle.EndUpdate();
                IStyle headerStyle = workbook.Styles.Add("HeaderStyle");
                headerStyle.BeginUpdate();
                headerStyle.Color = System.Drawing.Color.FromArgb(255, 174, 33);
                headerStyle.EndUpdate();
                namedSheet.Range["A10"].CellStyleName = "BodyStyle";
                namedSheet.Range["A1"].CellStyleName = "HeaderStyle";

                MemoryStream ms = new MemoryStream();
                workbook.SaveAs(ms);
                ms.Flush();
                byte[] bytes = ms.ToArray();
                ms.Close();
                Response.Clear();
                Response.AddHeader("Content-Disposition", "attachment; filename=foo.xlsx");
                Response.AddHeader("Content-Length", bytes.Length.ToString());
                Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
                Response.BinaryWrite(bytes);
            }

我们还分享了示例供您参考，可以从以下链接下载。

示例链接：https://www.syncfusion.com/downloads/support/directtrac/general/ze/Sample-1943806173.zip

有关在 MVC 平台创建 Excel 文件的更多信息，请参阅以下文档。

文档链接：https://help.syncfusion.com/file-formats/xlsio/create-read-edit-excel-files-in-asp-net-mvc-c-sharp#create-a-simple-excel-report

问候，

阿比拉米