我正在尝试导出excel并使其受密码保护。
我的代码如下。
但是我收到了错误：
Excel完成了文件级验证和修复。
本练习册的某些部分可能已被修复或丢弃。
我不知道我做错了什么。
如果没有包装的另存为行，我会这样做，那么这个错误就不会出现。
在我的控制器中：
[HttpGet]
public FileStreamResult ExportToExcel()
{
_objService = new ServiceBAL();
List<ReconcilationEntity> Objmodel = new List<ReconcilationEntity>();
Objmodel = _objService.GetCreditsudharLeads();
String URL = string.Empty;
if (!Directory.Exists(Server.MapPath("~/TempExcel")))
{
System.IO.Directory.CreateDirectory(Server.MapPath("~/TempExcel"));
}
String Filepath = Server.MapPath("~/TempExcel");
string date = DateTime.Now.ToShortDateString().Replace("/", "_") + "_" + DateTime.Now.ToShortTimeString().Replace(" ", "_").Replace(":", "_").Trim();
String FileName = "Creditsudhar_" + date + ".xlsx";
Filepath = Filepath + "\\" + FileName;
string[] columns = { "AffName", "AffPhone", "AffEmail", "ProductName", "ContactName", "Status", "CreatedOn", "Commission", "IsCommissionPaid", "Accountname", "AccountNumber", "BankName", "BankBranch", "IFSCCode", "PanNumber" };
var file = ExcelExportHelper.ExportExcel(ExcelExportHelper.ListToDataTable(Objmodel), Filepath, "Creditsudhar Reconcillation Sheet " + DateTime.Now.ToShortDateString(), true, columns);
var memStream = new MemoryStream(file);
return this.File(memStream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", FileName);
}
public static string ExcelContentType
{
get
{ return "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"; }
}
public static DataTable ListToDataTable<T>(List<T> data)
{
PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T));
DataTable dataTable = new DataTable();
for (int i = 0; i < properties.Count; i++)
{
PropertyDescriptor property = properties[i];
dataTable.Columns.Add(property.Name, Nullable.GetUnderlyingType(property.PropertyType) ?? property.PropertyType);
}
object[] values = new object[properties.Count];
foreach (T item in data)
{
for (int i = 0; i < values.Length; i++)
{
values[i] = properties[i].GetValue(item);
}
dataTable.Rows.Add(values);
}
return dataTable;
}
public static byte[] ExportExcel(DataTable dataTable, String Filepath, string heading = "", bool showSrNo = false, params string[] columnsToTake)
{
string fullPath = string.Empty;
byte[] ret;
DeleteUploadedFile(Filepath);
String result = String.Empty;
using (ExcelPackage package = new ExcelPackage())
{
ExcelWorksheet workSheet = package.Workbook.Worksheets.Add(String.Format("{0} Data", heading));
int startRowFrom = String.IsNullOrEmpty(heading) ? 1 : 3;
if (showSrNo)
{
DataColumn dataColumn = dataTable.Columns.Add("#", typeof(int));
dataColumn.SetOrdinal(0);
int index = 1;
foreach (DataRow item in dataTable.Rows)
{
item[0] = index;
index++;
}
}
// add the content into the Excel file
workSheet.Cells["A" + startRowFrom].LoadFromDataTable(dataTable, true);
// autofit width of cells with small content
int columnIndex = 1;
foreach (DataColumn column in dataTable.Columns)
{
try
{
ExcelRange columnCells = workSheet.Cells[workSheet.Dimension.Start.Row, columnIndex, workSheet.Dimension.End.Row, columnIndex];
int maxLength = columnCells.Max(cell => cell.Value.ToString().Count());
if (maxLength < 150)
{
workSheet.Column(columnIndex).AutoFit();
}
columnIndex++;
}
catch (Exception ex)
{
if (!(ex is System.Threading.ThreadAbortException))
{
//Log other errors here
}
}
}
// format header - bold, yellow on black
using (ExcelRange r = workSheet.Cells[startRowFrom, 1, startRowFrom, dataTable.Columns.Count])
{
r.Style.Font.Color.SetColor(System.Drawing.Color.White);
r.Style.Font.Bold = true;
r.Style.Fill.PatternType = OfficeOpenXml.Style.ExcelFillStyle.Solid;
r.Style.Fill.BackgroundColor.SetColor(System.Drawing.ColorTranslator.FromHtml("#1fb5ad"));
}
// format cells - add borders
using (ExcelRange r = workSheet.Cells[startRowFrom + 1, 1, startRowFrom + dataTable.Rows.Count, dataTable.Columns.Count])
{
r.Style.Border.Top.Style = ExcelBorderStyle.Thin;
r.Style.Border.Bottom.Style = ExcelBorderStyle.Thin;
r.Style.Border.Left.Style = ExcelBorderStyle.Thin;
r.Style.Border.Right.Style = ExcelBorderStyle.Thin;
r.Style.Border.Top.Color.SetColor(System.Drawing.Color.Black);
r.Style.Border.Bottom.Color.SetColor(System.Drawing.Color.Black);
r.Style.Border.Left.Color.SetColor(System.Drawing.Color.Black);
r.Style.Border.Right.Color.SetColor(System.Drawing.Color.Black);
}
// removed ignored columns
for (int i = dataTable.Columns.Count - 1; i >= 0; i--)
{
if (i == 0 && showSrNo)
{
continue;
}
if (!columnsToTake.Contains(dataTable.Columns[i].ColumnName))
{
workSheet.DeleteColumn(i + 1);
}
}
if (!String.IsNullOrEmpty(heading))
{
workSheet.Cells["A1"].Value = heading;
workSheet.Cells["A1"].Style.Font.Size = 20;
workSheet.InsertColumn(1, 1);
workSheet.InsertRow(1, 1);
workSheet.Column(1).Width = 5;
}
System.IO.FileInfo fileinfo2 = new System.IO.FileInfo(Filepath);
DeleteUploadedFile(Filepath);
workSheet.Protection.SetPassword("myPassword");
workSheet.Protection.IsProtected = true;
workSheet.Protection.AllowSelectUnlockedCells = false;
workSheet.Protection.AllowSelectLockedCells = false;
package.SaveAs(fileinfo2, "myPassword");
ret = package.GetAsByteArray();
return ret;
}
}
public static void DeleteUploadedFile(String filePath)
{
try
{
if (System.IO.File.Exists(filePath))
{
System.IO.File.Delete(filePath);
}
}
catch (Exception ex)
{ }
}
public static byte[] ExportExcel<T>(List<T> data, String Filepath, string Heading = "", bool showSlno = false, params string[] ColumnsToTake)
{
return ExportExcel(ListToDataTable<T>(data), Filepath, Heading, showSlno, ColumnsToTake);
}
答案 0 :(得分：2)
answer提到了SaveAs 关闭包，因此正确的步骤将保存的文件作为数组返回，而不是之后使用GetAsByteArray。或者只使用没有SaveAs的GetAsByteArray（密码）。