将记录从 Excel 文件上传到服务器 - 桌面应用程序

Question

我有以下要求：

我电脑的 D:// 驱动器中有一个名为 BATCH 的文件夹。

现在 D://BATCH 包含 excel 个任意名称的文件。每个 excel 文件只有一条记录。

我必须创建 .exe 文件或任何允许用户浏览 BATCH 文件夹然后可以从 excel 上传内容或数据的桌面应用程序文件到我们的服务器。我们要把excel的数据放到JSON中，然后上传到服务器。

还有一件事是，如果我已经从 3 个文件上传数据，然后用户再次尝试通过选择文件夹上传，新数据或未上传的数据应该只上传那些数据。 BATCH 文件夹中的数据每天通过连接的机器生成。

我的背景是 Web 和移动开发。所以，按照上面的解释，对实现这件事有点困惑。

那么，我该如何实现呢？我必须使用哪些技术或哪些工具有用？

感谢支持

Answer 1

问题太宽泛了，你可以通过多种方式实现你的要求。

如果您考虑使用 c#，您可以开发一个 WPF 或 Winforms 项目。

您将需要遵循这些基本步骤

像 FolderBrowserDialog 一样的浏览和选择文件的功能在 System.Windows.Forms 中可用。如果您使用的是 WPF，则必须添加对库的引用
阅读excel内容。在这种情况下，您可能需要引用任何 library/nuget 包，例如 Epplus、Microsoft.Office.Interop.Excel、LinqToExcel 或 ExcelLibrary
使用 Newtonsoft.Json nuget 包将数据转换为 json 格式
将数据上传或保存到 SQL 服务器 - 此处您需要一个数据库连接字符串并将其保存在您的 .config 文件中。您可以为此使用 ADO、linq to sql 等。

示例代码

OpenFileDialog openFileDialog = new OpenFileDialog();
        openFileDialog.Filter = "Excel files (*.xls)|*.csv|All files (*.*)|*.*";
        if (openFileDialog.ShowDialog()== DialogResult.OK)
{
       //Open file and read contents

       var excelFile = new LinqToExcel.ExcelQueryFactory(path);


            var query =
                from row in excelFile.Worksheet("Sheet1")
                let item = new
                {
                    Column1 = row["Column1"].Cast<string>(),
                    Column2 = row["Column2"].Cast<int>(),

                }

                select item;

            foreach (var item in query)
            {
                MyCustomClass myClass = new MyCustomClass();
                myClass.Column1 = item.Column1;
                myClass.Column2 = item.Column2;

                //Do something
            }
            //convert to json
            // Save to database
}

Answer 2

可能有很多方法可以给这只猫剥皮。也许将文件夹中所有 Excel 文件中的所有内容导入到一个 Excel 文件中，然后将其导出到 SQL 服务器。只是一个想法。

Sub InsertInto()

'Declare some variables
Dim cnn As adodb.Connection
Dim cmd As adodb.Command
Dim strSQL As String

'Create a new Connection object
Set cnn = New adodb.Connection

'Set the connection string
cnn.ConnectionString = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=True;Initial Catalog=Northwind;Data Source=Server_Name"

'Create a new Command object
Set cmd = New adodb.Command

'Open the Connection to the database
cnn.Open

'Associate the command with the connection
cmd.ActiveConnection = cnn

'Tell the Command we are giving it a bit of SQL to run, not a stored procedure
cmd.CommandType = adCmdText

'Create the SQL
strSQL = "UPDATE TBL SET JOIN_DT = '2019-12-10' WHERE EMPID = 2"

'Pass the SQL to the Command object
cmd.CommandText = strSQL


'Execute the bit of SQL to update the database
cmd.Execute

'Close the connection again
cnn.Close

'Remove the objects
Set cmd = Nothing
Set cnn = Nothing

End Sub

只是为了美化我的原始答案......您可以使用如下概念轻松地将文件夹中多个 excel 文件的数据导入到一个 Excel 文件中.

Sub Basic_Example_1()
    Dim MyPath As String, FilesInPath As String
    Dim MyFiles() As String
    Dim SourceRcount As Long, Fnum As Long
    Dim mybook As Workbook, BaseWks As Worksheet
    Dim sourceRange As Range, destrange As Range
    Dim rnum As Long, CalcMode As Long

    'Fill in the path\folder where the files are
    MyPath = "C:\Users\Ron\test"

    'Add a slash at the end if the user forget it
    If Right(MyPath, 1) <> "\" Then
        MyPath = MyPath & "\"
    End If

    'If there are no Excel files in the folder exit the sub
    FilesInPath = Dir(MyPath & "*.xl*")
    If FilesInPath = "" Then
        MsgBox "No files found"
        Exit Sub
    End If

    'Fill the array(myFiles)with the list of Excel files in the folder
    Fnum = 0
    Do While FilesInPath <> ""
        Fnum = Fnum + 1
        ReDim Preserve MyFiles(1 To Fnum)
        MyFiles(Fnum) = FilesInPath
        FilesInPath = Dir()
    Loop

    'Change ScreenUpdating, Calculation and EnableEvents
    With Application
        CalcMode = .Calculation
        .Calculation = xlCalculationManual
        .ScreenUpdating = False
        .EnableEvents = False
    End With

    'Add a new workbook with one sheet
    Set BaseWks = Workbooks.Add(xlWBATWorksheet).Worksheets(1)
    rnum = 1

    'Loop through all files in the array(myFiles)
    If Fnum > 0 Then
        For Fnum = LBound(MyFiles) To UBound(MyFiles)
            Set mybook = Nothing
            On Error Resume Next
            Set mybook = Workbooks.Open(MyPath & MyFiles(Fnum))
            On Error GoTo 0

            If Not mybook Is Nothing Then

                On Error Resume Next

                With mybook.Worksheets(1)
                    Set sourceRange = .Range("A1:C1")
                End With

                If Err.Number > 0 Then
                    Err.Clear
                    Set sourceRange = Nothing
                Else
                    'if SourceRange use all columns then skip this file
                    If sourceRange.Columns.Count >= BaseWks.Columns.Count Then
                        Set sourceRange = Nothing
                    End If
                End If
                On Error GoTo 0

                If Not sourceRange Is Nothing Then

                    SourceRcount = sourceRange.Rows.Count

                    If rnum + SourceRcount >= BaseWks.Rows.Count Then
                        MsgBox "Sorry there are not enough rows in the sheet"
                        BaseWks.Columns.AutoFit
                        mybook.Close savechanges:=False
                        GoTo ExitTheSub
                    Else

                        'Copy the file name in column A
                        With sourceRange
                            BaseWks.cells(rnum, "A"). _
                                    Resize(.Rows.Count).Value = MyFiles(Fnum)
                        End With

                        'Set the destrange
                        Set destrange = BaseWks.Range("B" & rnum)

                        'we copy the values from the sourceRange to the destrange
                        With sourceRange
                            Set destrange = destrange. _
                                            Resize(.Rows.Count, .Columns.Count)
                        End With
                        destrange.Value = sourceRange.Value

                        rnum = rnum + SourceRcount
                    End If
                End If
                mybook.Close savechanges:=False
            End If

        Next Fnum
        BaseWks.Columns.AutoFit
    End If

ExitTheSub:
    'Restore ScreenUpdating, Calculation and EnableEvents
    With Application
        .ScreenUpdating = True
        .EnableEvents = True
        .Calculation = CalcMode
    End With
End Sub

请参阅下面的 link，了解如何从多个 Excel files/sources 中获取数据，合并为一个 file/source。

http://www.rondebruin.nl/win/s3/win008.htm

对这种事情保持开放的心态。有几种其他方法可以做本质上相同的事情。

将记录从 Excel 文件上传到服务器 - 桌面应用程序

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