如何使用 vb.net 中 excel 表中的数据更新 sql 表

Question

我在使用 Excel 表更新 sql 表时遇到问题。事实是，我正在开发这个小项目，用户可以首先通过单击 vb.net 应用程序中的按钮将包含 StudentNumber、SubjectID、ClassScore、ExamScore 的课程列表导出或打印到 excel 表格中，然后编辑表格通过填写 ClassScore 和 ExamScore，然后通过 vb.net 将工作表上传回 sql。 问题是如何检查当前 StudentNumber 或行是否存在于 sql 表中，然后更新表，否则插入新行。 这是我使用 SQLBulk Copy 的代码，剩下的就是在 vb.net 中更新 sql 表

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim ofd As New OpenFileDialog

    If ofd.ShowDialog() <> System.Windows.Forms.DialogResult.OK Then Exit Sub
    ' Dim dgv As System.Windows.Forms.DataGridView
    With ofd
        .Filter = "Excel files(*.xls)|*.xls|All files (*.*)|*.*"
        .FilterIndex = 1
        .Title = "Import data from Excel file"
    End With
    Dim nme As String = ofd.FileName
          Import(nme, dgv)

End Sub
Public Shared Function Import(ByVal FileName As String, ByVal dgv As DataGridView) As Boolean
    Dim MyConnection As System.Data.OleDb.OleDbConnection
    Dim DtSet As System.Data.DataSet
    Dim MyCommand As System.Data.OleDb.OleDbDataAdapter
    MyConnection = New System.Data.OleDb.OleDbConnection("provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + FileName + ";Extended Properties=Excel 12.0 Xml;")
    'MyConnection = New System.Data.OleDb.OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0;Data Source='c:\vb.net-informations.xls';Extended Properties=Excel 8.0;")
    MyCommand = New System.Data.OleDb.OleDbDataAdapter("select * from [Sheet1$]", MyConnection)
    MyCommand.TableMappings.Add("Table", "Scores")
    DtSet = New System.Data.DataSet
    MyCommand.Fill(DtSet)
    dgv.DataSource = DtSet.Tables(0)
    MyConnection.Close()


    Dim expr As String = "SELECT * FROM [Sheet1$]"


    Dim SQLconn As New SqlConnection()
    Dim ConnString As String = "Data Source=xxxx-PC;Initial Catalog=TryExcel;Persist Security Info=True;User ID=xx;Password=xxxx"
    Dim objCmdSelect As OleDbCommand = New OleDbCommand(expr, MyConnection)
    Dim objDR As OleDbDataReader

    SQLconn.ConnectionString = ConnString

    Using bulkCopy As SqlBulkCopy = New SqlBulkCopy(ConnString)
        bulkCopy.DestinationTableName = "Scores"

        MyConnection.Open()
        objDR = objCmdSelect.ExecuteReader
        bulkCopy.WriteToServer(objDR)
        objDR.Close()
        SQLconn.Close()

    End Using
    Return True
End Function

Private Shared Function safefilename() As String
    Throw New NotImplementedException
End Function

Answer 1

Private Sub Upload_Workbook()

        Dim t As New Thread(New ThreadStart(Sub()
                                                dt = New DataTable

                                                dt = New DataTable("Table_Name")
                                                dt.Columns.Add("Column_1")
                                                dt.Columns.Add("Column_2)
                                                dt.Columns.Add("Column_3")
                                                dt.Columns.Add("Column_4")
                                                dt.Columns.Add("Column_5")
                                                dt.Columns.Add("Column_6")
                                                dt.Columns.Add("Column_7")

                                                ds = New DataSet
                                                ds.Tables.Add(dt)

                                                Dim i As Integer

                                                For i = 2 To (Cells(1, 11).Text)

                                                    dr = dt.NewRow
                                                    dr(0) = Cells(i, 1).Text
                                                    dr(1) = Cells(i, 2).Text
                                                    dr(2) = Cells(i, 3).Text
                                                    dr(3) = Cells(i, 4).Text
                                                    dr(4) = Cells(i, 5).Text
                                                    dr(5) = Cells(i, 6).Text
                                                    dr(6) = Cells(i, 7).Text

                                                    dt.Rows.Add(dr)
                                                Next i

                                                trans = con.BeginTransaction
                                                Try
                                                    Dim row As Integer

                                                    While (row < dt.Rows.Count)

                                                        Dim cmd As New SqlCommand("Sheet1_Upload", con, trans)

                                                        cmd.CommandType = CommandType.StoredProcedure

                                                        cmd.Parameters.AddWithValue("Column_1", dt.Rows(row).ItemArray(0))
                                                        cmd.Parameters.AddWithValue("Column_2", dt.Rows(row).ItemArray(1))
                                                        cmd.Parameters.AddWithValue("Column_3", dt.Rows(row).ItemArray(2))
                                                        cmd.Parameters.AddWithValue("Column_4", dt.Rows(row).ItemArray(3))
                                                        cmd.Parameters.AddWithValue("Column_5", dt.Rows(row).ItemArray(4))
                                                        cmd.Parameters.AddWithValue("Column_6", dt.Rows(row).ItemArray(5))
                                                        cmd.Parameters.AddWithValue("Column_7", dt.Rows(row).ItemArray(6))
                                                        cmd.ExecuteNonQuery()

                                                        row = row + 1

                                                    End While

                                                    trans.Commit()

                                                Catch ex As Exception
                                                    MsgBox(ex.Message)
                                                    trans.Rollback()
                                                End Try

                                            End Sub))

        t.Start()
End Sub

'''''''SQL存储过程'''''''

创建过程 Sheet1_Upload(@Column_1 varchar(50),@Column_2 varchar(50),@Column_3 varchar(50),@Column_4 varchar(50),@Column_5 varchar(50),@Column_6 varchar(50)) 作为 开始

插入 INTO Table_Name(Column_1,Column_2,Column_3,Column_4,Column_5,Column_6) 值(@Column_1,@Column_2,@Column_3,@Column_4,@Column_5,@Column_6) 结束

请在 Visual Basic>Office/Share Point>Excel 2013 工作簿上创建此项目。File Path Image 然后使用另一个程序打开工作簿。

    oXL = CreateObject("Excel.Application")
    oXL.Visible = False
    oWB = oXL.Workbooks.Open("D:\workbook.xlsm")
    oWB.Activate()
    oWB.RunAutoMacros(Excel.XlRunAutoMacro.xlAutoOpen)

在 VB.net 中使用 excel Auto_Open 宏和工作表更改事件。