我正在尝试获取 API 来开始下载已创建的 Excel 电子表格。虽然,我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,但 Excel 文件已损坏并且不包含任何数据。
Controller :
[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;
}
}
具有电子表格创建方法的ExcelController类:
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);
}
我知道映射器不需要在那里。但是我将其保留在那里,如果我需要将字节数组带到前面并从那里开始。
有关此事的任何指示或指导将不胜感激。
谢谢。
为感兴趣或面临类似问题的人找到解决方案(请参阅下面的作者答案)
我将 { responseType: ResponseContentType.Blob }
添加到 TypeScript 中的服务调用中。
然后它返回了我一个电子表格。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);
}
然后让我的文件下载客户端。
非常感谢大家。尤其是答案的作者。
最佳答案
你需要告诉 Angular 响应不是 JSON 格式,因此它不会尝试解析它。尝试将代码更改为:
createExcelDocument(model: BillList[]): any {
return this.http.post(this.getBarBillsUrl + "/CreateExcelDocument",
model, { responseType: ResponseContentType.Blob })
.map(this.helper.extractData)
.catch(this.helper.handleError);
}
以上代码适用于二进制格式,但对于 Excel 文件,您应该使用以下代码:
const httpOptions = {
headers: new HttpHeaders({ 'responseType': 'ResponseContentType.Blob',
'Content-Type': 'application/vnd.ms-excel'})};
createExcelDocument(model: BillList[]): any {
return this.http.post(this.getBarBillsUrl + "/CreateExcelDocument",
model, httpOptions )
.map(this.helper.extractData)
.catch(this.helper.handleError);
}
关于c# - 将 OpenXML 创建的 Excel 电子表格导出到客户端,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52666998/