我正在开发一个应用程序，将 csv 中的数据插入到 postgresql 数据库中。我填充了一个数据网格，遍历数据网格并将一条记录插入到表中（是的，我知道代码非常冗长，但我现在就希望它这样用于测试目的）。一切似乎都运行良好；在运行代码和调试时，变量在循环期间会发生变化，但是，在插入数据库时，它仅在每次新插入时插入第一行中的数据，而不是新变量值。
想法？建议？
这是完整的代码：`Me.btnPoupulateData.Enabled = True Dim objConn As New System.Data.Odbc.OdbcConnection Dim objCmd As New System.Data.Odbc.OdbcCommand Dim dtAdapter As New System.Data.Odbc.OdbcDataAdapter Dim ds As New DataSet 将 strConnString 作为字符串 将 strSQL 作为字符串进行调暗
'these are the required fields for the table product_template
'catc null vals as exceptions
Dim str_mes_type As String = "fixed"
Dim i_uom_id As Integer = 1
Dim i_uom_po_id As Integer = 1
Dim strtype As String = "product"
Dim str_procure_method As String = "make_to_stock"
Dim str_cost_method As String = "standard"
Dim i_categ_id As Integer = 1
Dim str_supply_method As String = "buy"
Dim str_sale_ok As String = True
Dim str_import_date As String = Me.txtImportID.Text
Dim dgv As DataGridView = DataGridView1
Dim iImportCounter As Integer = 0
System.Windows.Forms.Cursor.Current = Cursors.WaitCursor
strConnString = "Dsn=PostgreSQL35W;database=OpenERP;server=localhost;port=5432;uid=openpg;pwd=openpgpwd"
objConn.ConnectionString = strConnString
objConn.Open()
strSQL = "INSERT INTO product_template (name,description,standard_price,list_price,mes_type,uom_id,uom_po_id,type,procure_method,cost_method,categ_id,supply_method,sale_ok,import_date) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)"
dtAdapter.SelectCommand = objCmd
objCmd.Connection = objConn
Try
For i As Integer = 0 To dgv.RowCount - 1
'workaround for the problem of not exiting the loop when at end of rows
If dgv.RowCount = 1 Then
Exit Try
End If
iImportCounter = iImportCounter + 1
Me.lblRecordsImported.Text = "Records imported: " & iImportCounter
Dim r As DataGridViewRow = dgv.Rows(i)
'*************these are the changeable variables******
With objCmd
.Parameters.Add("name", Odbc.OdbcType.NVarChar)
.Parameters.Add("description", Odbc.OdbcType.NVarChar)
.Parameters.Add("standard_price", Odbc.OdbcType.NVarChar)
.Parameters.Add("list_price", Odbc.OdbcType.NVarChar)
End With
'name goes to default code which is the internal reference number
Dim strName As String
strName = dgv.Rows(i).Cells(0).Value
Dim str_description As String
str_description = dgv.Rows(i).Cells(1).Value
Dim i_standard_price As String
i_standard_price = dgv.Rows(i).Cells(2).Value
Dim i_list_price As String
i_list_price = dgv.Rows(i).Cells(3).Value
With objCmd
'number of parameters must equal number of ? marks in sql statement
'14 params now
'.Parameters.AddWithValue used only for data that's constant
.Parameters("name").Value = strName
.Parameters("description").Value = str_description
.Parameters("standard_price").Value = i_standard_price
.Parameters("list_price").Value = i_list_price
.Parameters.AddWithValue("mes_type", str_mes_type)
.Parameters.AddWithValue("uom_id", i_uom_id)
.Parameters.AddWithValue("uom_po_id", i_uom_po_id)
.Parameters.AddWithValue("type", strtype)
.Parameters.AddWithValue("procure_method", str_procure_method)
.Parameters.AddWithValue("cost_method", str_cost_method)
.Parameters.AddWithValue("categ_id", i_categ_id)
.Parameters.AddWithValue("supply_method", str_supply_method)
.Parameters.AddWithValue("sale_ok", str_sale_ok)
'*******created new column in product_template called import_date*******
'type set to char verying, to be used for later searching
.Parameters.AddWithValue("import_date", str_import_date)
.CommandText = strSQL
.ExecuteNonQuery()
'delete the gridview row after import
dgv.Rows.RemoveAt(i)
Application.DoEvents()
End With
Next
Catch ex As Exception '
'this is my way to resume next since there are errors on specific data rows that
'will be ignored
ImportCSV()
End Try
objConn.Close()
System.Windows.Forms.Cursor.Current = Cursors.Default
`