我正在尝试调用API来启动已创建的Excel电子表格的下载。不过,似乎遇到了一些麻烦。我也尝试将电子表格内存流的字节数组发送到前端并从那里开始处理,但是Excel文件损坏且不包含任何数据。
控制器:
[HttpPost]
[Route("CreateExcelDocument")]
public ActionResult CreateExcelDocument([FromBody] List<BarBillList> model)
{
try
{
byte[] tmp;
using (ExcelController ex = new ExcelController())
{
tmp = ex.createExcelSpreadsheet(barBillExport);
}
string fileName = "xxx.xlsx";
return File(tmp, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", fileName);
}
catch (Exception e)
{
return null;
}
}
ExcelController类带有创建电子表格的方法:
public byte[] createExcelSpreadsheet(List<BarBillList> barBillExport)
{
DateTime today = DateTime.Today;
using (MemoryStream ms = new MemoryStream())
{
using (SpreadsheetDocument document = SpreadsheetDocument.Create(ms, SpreadsheetDocumentType.Workbook))
{
//Creating the initial document
WorkbookPart workbookPart = document.AddWorkbookPart();
workbookPart.Workbook = new Workbook();
WorksheetPart worksheetPart = workbookPart.AddNewPart<WorksheetPart>();
worksheetPart.Worksheet = new Worksheet();
workbookPart.Workbook.Save();
//Styling the doucment
WorkbookStylesPart stylesPart = workbookPart.AddNewPart<WorkbookStylesPart>();
stylesPart.Stylesheet = GenerateStyleSheet();
stylesPart.Stylesheet.Save();
//Adding width to the columns
DocumentFormat.OpenXml.Spreadsheet.Columns columns = new DocumentFormat.OpenXml.Spreadsheet.Columns();
columns.Append(new DocumentFormat.OpenXml.Spreadsheet.Column() { Min = 1, Max = 6, Width = 20, CustomWidth = true });
worksheetPart.Worksheet.Append(columns);
//Creating the worksheet part to add the data to
Sheets sheets = workbookPart.Workbook.AppendChild(new Sheets());
Sheet sheet = new Sheet() { Id = workbookPart.GetIdOfPart(worksheetPart), SheetId = 1, Name = "BarBill" };
sheets.Append(sheet);
SheetData sheetData = worksheetPart.Worksheet.AppendChild(new SheetData());
//Creating the first Header Row
Row row = new Row();
row.Append(
ConstructCell("Name", CellValues.String, true),
ConstructCell("Last Payment Date", CellValues.String, true),
ConstructCell("Last Payment Amount", CellValues.String, true),
ConstructCell("Current Balance", CellValues.String, true));
sheetData.AppendChild(row);
//Appending the data into their respective columns
foreach (var ent in barBillExport)
{
row = new Row();
row.Append(
ConstructCell(ent.Name.ToString(), CellValues.String, false),
ConstructCell((ent.LastPaymentDate.ToString().Length > 0) ? ent.LastPaymentDate.ToString() : "", CellValues.String, false),
ConstructCell((ent.LastPayment.ToString().Length > 0) ? ent.LastPayment.ToString() : "", CellValues.String, false),
ConstructCell((ent.TotalBalance.ToString().Length > 0) ? ent.TotalBalance.ToString() : "", CellValues.String, false));
sheetData.AppendChild(row);
}
worksheetPart.Worksheet.Save();
}
return ms.ToArray();
}
}
编辑
前端服务:
createExcelDocument(model: BillList[]): any {
return this.http.post(this.getBarBillsUrl + "/CreateExcelDocument", model)
.map(this.helper.extractData)
.catch(this.helper.handleError);
}
我知道映射器不必存在,但如果需要将字节数组带到前端并在那里进行操作,我会保留它。
如有任何疑问或指导,将不胜感激。
谢谢。
对于那些感兴趣或遇到类似问题的人已找到解决方案(请参见下面的作者答案)
我在TypeScript中的服务调用中添加了{ responseType: ResponseContentType.Blob }
。
然后它返回给我一个电子表格的blob。从那里,在typescript中我通过另一种方法运行它:
private saveAsBlob(data: any) {
const year = this.today.getFullYear();
const month = this.today.getMonth();
const date = this.today.getDate();
const dateString = year + '-' + month + '-' + date;
const file = new File([data], 'BarBill ' + dateString + '.xlsx',
{ type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' });
FileSaver.saveAs(file);
}
为了让我的文件在客户端下载,感谢所有人,特别是答案的作者。