protected virtual IWorkbook CreateExcelWorkBook(string locale, ExportTemplate exportTemplate, SearchArgs <T> searchArgs)
{
var result = Search(searchArgs);
IWorkbook workbook = new XSSFWorkbook();
ISheet sheet = workbook.CreateSheet("Sheet1");
var row = sheet.CreateRow(0);
var exportProperties = typeof(TDTO).GetProperties(BindingFlags.Public | BindingFlags.Instance);
var exportFields = exportTemplate.Headers.Select(y => y.Field).ToList();
for (int i = 0; i < exportFields.Count; i++)
{
var header = exportTemplate.Headers.FirstOrDefault(x => x.Field.Equals(exportFields[i]));
var cell = row.CreateCell(i, CellType.String);
cell.SetCellValue("en-us".EqualsIgnoreCase(locale) ? header.EnHeaderText : header.CnHeaderText); //表头
}
for (int i = 1; i < result.Items.Count() + 1; i++)
{
row = sheet.CreateRow(i);
for (int j = 0; j < exportFields.Count; j++)
{
var cell = row.CreateCell(j, CellType.String);
var value = exportProperties.FirstOrDefault(x => x.Name == exportFields[j])?.GetValue(result.Items.ElementAt(i - 1));
var header = exportTemplate.Headers.FirstOrDefault(x => x.Field.Equals(exportFields[j]));
if (header.Formatter != null)
{
value = header.Formatter(value);
}
cell.SetCellValue(value?.ToString());
}
}
return(workbook);
}
public virtual string Export(string locale, ExportTemplate exportTemplate, SearchArgs <T> searchArgs)
{
var webRootPath = PlatformServices.Default.Application.ApplicationBasePath;
var dir = Path.Combine(webRootPath, "files", "export");
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
string fileNamePrefix = "en-us".EqualsIgnoreCase(locale) ?
exportTemplate.EnFileNamePrefix : exportTemplate.CnFileNamePrefix;
string fileName = $"{fileNamePrefix}_{DateTime.Now.ToStringIgnoreCulture("yyyyMMddHHmmss")}.xlsx";
var filePath = Path.Combine(dir, fileName);
if (File.Exists(filePath))
{
var attachment = AttachmentRepository.SingleOrDefault(x => x.OrginalFileName == fileName);
if (attachment != null)
{
attachment.DownloadTimes++;
AttachmentRepository.Update(attachment);
return(attachment.FileGuid);
}
}
IWorkbook workbook = CreateExcelWorkBook(locale, exportTemplate, searchArgs);
using (var stream = new FileStream(filePath, FileMode.Create, FileAccess.Write))
{
workbook.Write(stream);
var md5 = MD5Util.MD5Stream(filePath);
var size = new FileInfo(filePath).Length;
Attachment attachment = new Attachment()
{
Type = "export",
ContentType = "application/vnd.ms-excel",
DownloadTimes = 0,
FileExtention = ".xlsx",
FileName = fileName,
OrginalFileName = fileName,
MD5 = md5,
Size = size,
};
var user = GetUserIdentity();
if (user != null)
{
attachment.CreateTime = DateTime.Now;
attachment.CreateUserName = user.UserName;
attachment.ModifyTime = DateTime.Now;
attachment.ModifyUserName = user.UserName;
}
AttachmentRepository.Insert(attachment);
return(attachment.FileGuid);
}
}
