EPPlus图书馆,另存为

时间:2016-10-05 09:41:43

标签: c# wpf epplus

使用EPPlus,可以很容易地将文档保存到预定义的路径,但我需要每次都保存到不同的路径,所以我需要EPPlus来显示标准的保存对话框。

我的代码可以从数据表创建一个Excel文件,将其格式化一点,并将其保存在指定的位置:

            DirectoryInfo outputDir = new DirectoryInfo(@"C:\Users\user001\Downloads");
            FileInfo newFile = new FileInfo(outputDir.FullName + @"\Crit.xlsx");

            if (newFile.Exists) {newFile.Delete();}

            using (ExcelPackage pck = new ExcelPackage(newFile))
            {
                ExcelWorksheet ws = pck.Workbook.Worksheets.Add("Crit");
                ws.Cells["A1"].LoadFromDataTable(dtCrit, true);
                ws.Cells.AutoFitColumns(0);
                ws.Cells["A1:Z1"].Style.Border.Top.Style = ExcelBorderStyle.Thin;
                ws.Cells["A1:Z1"].Style.Font.Bold = true;
                pck.Save();
           }

如何显示手动选择目标文件夹的对话框? 我试过pck.SaveAs,但是我无法使它工作,而且关于这个的信息不多......

更新: 该应用程序在从项目内部或从服务器执行时工作。如果使用shourcut执行或将exe文件复制/粘贴到我的桌面,则会崩溃。

string mydocpath = System.Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);

      try {
                DirectoryInfo outputDir = new DirectoryInfo(mydocpath);
                FileInfo newFile = new FileInfo(outputDir.FullName + @"\Requerimientos_" + DateTime.Now.ToString("dd-MM-yyyy_hh-mm") + ".xlsx");

                if (newFile.Exists) { newFile.Delete(); }

                using (ExcelPackage pck = new ExcelPackage(newFile))
                {
                    ExcelWorksheet ws = pck.Workbook.Worksheets.Add("Requerimientos");
                    ws.Cells["A1"].LoadFromDataTable(dtReque, true);
                    ws.Cells.AutoFitColumns(0);
                    ws.Cells["A1:Z1"].Style.Border.Top.Style = ExcelBorderStyle.Thin;
                    ws.Cells["A1:Z1"].Style.Font.Bold = true;

                    var dlg = new SaveFileDialog { FileName = "Requerimientos_" + DateTime.Now.ToString("dd-MM-yyyy_hh-mm"), DefaultExt = ".xlsx", Filter = "Excel Sheet (.xlsx)|*.xlsx", InitialDirectory = mydocpath };
                    var result = dlg.ShowDialog();
                    if (result == true)
                    {
                        using (var stream = dlg.OpenFile())
                        {
                            pck.SaveAs(stream);
                            OpenDialog("File Created", "Export");
                        }
                    }
                }
        }
        catch(Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }

2 个答案:

答案 0 :(得分:1)

尝试使用SaveFileDialog

private static bool? saveExcelPackageDialog(string fileName, string workingDirectory, byte[] rawBinaryObject)
{
    SaveFileDialog sfd = new SaveFileDialog();
    sfd.Filter = EXCEL_FILTER_FILE_DIALOG;
    sfd.InitialDirectory = workingDirectory;
    sfd.FileName = fileName;

    bool? result = sfd.ShowDialog();
    if (result == true)
    {
        File.WriteAllBytes(sfd.FileName, rawBinaryObject);
        System.Diagnostics.Process.Start(sfd.FileName);
    }
    return result;
}

你必须这样使用它:

saveExcelPackageDialog(newFile.FullName, outputDir.FullName, pkg.GetAsByteArray());

答案 1 :(得分:1)

WPF通过Microsoft.Win32命名空间提供标准文件对话框。您可以使用SaveFileDialog显示一个对话框,然后选择或创建要保存到的文件。

选择文件后,您将从路径中创建一个FileInfo并将其传递给SaveAs,例如:

// Configure save file dialog box
var dlg = new Microsoft.Win32.SaveFileDialog 
              {
                  FileName = "NewSheet", // Default file name
                  DefaultExt = ".xlsx", // Default file extension
                  Filter = "Excel Sheet (.xlsx)|*.xlsx" // Filter files by extension
              }

// Show save file dialog box
var result = dlg.ShowDialog();

// Process save file dialog box results
if (result == true)
{
    // Save document
        string filename = new FileInfo(dlg.FileName);
        package.SaveAs(newFile);
}

或者您可以使用SaveFileDialog.OpenStream让对话框本身创建一个要保存到的流:

if (result == true)
{
        // Save document
        using(var stream=dlg.OpenStream())
        {
            package.SaveAs(stream);
        }
}