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[英]Having trouble saving Excel spreadsheet from asp.net web api backend using Aspose.Cells, and Angular 2 front end
[英]Asp.net WebApi Aspose.Cells - export and download excel
我使用 Aspose.Cells 创建 excel 文件。
实际上我正在尝试将 xls 文件保存在磁盘上,但我无法解决这个问题。 这是我的获取方法。
[Route("xls")]
[HttpGet]
public HttpResponseMessage Export()
{
try
{
string dataDir = KnownFolders.GetPath(KnownFolder.Downloads);
//var workbook = TransferService.Export(); //TODO get xml
Workbook workbook = new Workbook();
var stream = workbook.SaveToStream();
// I need save this workbook
return Request.CreateResponse(HttpStatusCode.OK); //it's not important here
}
catch (Exception ex)
{
return Request.CreateResponse(HttpStatusCode.InternalServerError); //it's not important here
}
}
我还有 function 称为 onClick
function exportToXls() {
$.get(exportURI, function (response) {
return response;
});
}
当有人点击它时,它应该将文件保存在他的磁盘上(或打开浏览器,我可以在其中选择位置和名称)。 如何解决这个问题?
C#
[Route("xls")]
[HttpPost] // can use Get, but Post seems to be recommended
public HttpResponseMessage Export()
{
var response = new HttpResponseMessage();
try
{
// Create workbook
var wb = new Workbook();
/* ** fill in workbook / worksheet content ** */
// save workbook to MemoryStream
var stream = new MemoryStream();
wb.Save(stream, SaveFormat.Xlsx);
stream.Position = 0; // important!
// add stream to response
response.Content = new StreamContent(stream);
// set Headers
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue(dispositionType: "attachment"); // or "inline"
response.Content.Headers.ContentDisposition.FileName = wb.FileName; // or other means of getting filename
response.Content.Headers.ContentType = new MediaTypeHeaderValue(mediaType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
response.Content.Headers.ContentLength = stream.Length;
// set the success code
response.StatusCode = HttpStatusCode.OK;
}
catch(Exception ex)
{
response.StatusCode = HttpStatusCode.InternalServerError;
response.Content = null; // just in case
response.ReasonPhrase = ex.Message;
}
return response;
}
如果启用了CORS,则可能需要允许Content-Disposition标头:
public static void Register(HttpConfiguration config)
{
var cors = new EnableCorsAttribute(origins: "*", headers: "*", methods: "*");
cors.ExposedHeaders.Add(item: "Content-Disposition");
config.EnableCors(cors);
/* The rest of WebAPI configuration */
}
对于Javascript方面- 此处的答案可能会有所帮助。 (注意:确保将方法设置为POST,或将我的示例更改为GET。)
在ASP.NET中,可以通过以下代码将XLS或XLSX文件发送到浏览器。
C#
//Save file and send to client browser using selected format
if (yourFileFormat == "XLS")
{
workbook.Save(HttpContext.Current.Response, "output.xls", ContentDisposition.Attachment, new XlsSaveOptions(SaveFormat.Excel97To2003));
}
else
{
workbook.Save(HttpContext.Current.Response, "output.xlsx", ContentDisposition.Attachment, new OoxmlSaveOptions(SaveFormat.Xlsx));
}
HttpContext.Current.Response.End();
上面的代码会将XLS文件发送到浏览器。 如果您更改此行
if (yourFileFormat == "XLS")
像
if (yourFileFormat == "XLSX")
然后它将XLSX文件发送到浏览器。 请从下面的链接下载ASP.NET Web应用程序项目 ,以查看上面的代码正在运行。
项目链接:
http://www.aspose.com/community/forums/293730/postattachment.aspx
请不要使用Workbook.SaveToStream()方法获取内存流对象。 请检查以下代码,如何获取不同格式的内存流对象,例如XLS,XLSX等。
//Create workbook object
Workbook wb = new Workbook("source.xlsx");
//This is how to save Workbook to XLS format
MemoryStream ms1 = new MemoryStream();
wb.Save(ms1, SaveFormat.Excel97To2003);
//Just to check if memory stream is good and contains XLS bytes
byte[] b1 = ms1.ToArray();
File.WriteAllBytes("output.xls", b1);
//This is how to save Workbook to XLSX format
MemoryStream ms2 = new MemoryStream();
wb.Save(ms2, SaveFormat.Xlsx);
//Just to check if memory stream is good and contains XLSX bytes
byte[] b2 = ms2.ToArray();
File.WriteAllBytes("output.xlsx", b2);
注意:我在Aspose担任开发人员布道者
使用 .net 从使用File
操作结果的 Andews 版本稍微调整。
[HttpGet("download")]
public async Task<IActionResult> DownloadSystem()
{
var workbook = new Workbook();
var fileName = $"Report.xlsx";
var cd = new System.Net.Mime.ContentDisposition
{
FileName = fileName,
Inline = false,
};
Response.Headers.Add("Content-Disposition", cd.ToString());
var stream = new MemoryStream();
workbook.Save(stream, SaveFormat.Xlsx);
stream.Position = 0;
return File(stream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", fileName);
}
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