Question

从vb程序插入查询在访问数据库中不添加任何记录。

database connection class-->
Imports System.Data.OleDb
Public Class Data
    Shared dbconnection As OleDbConnection
    Shared dbcommand As OleDbCommand
    Shared dbadapter As OleDbDataAdapter
    Shared connectionString As String =     "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\DELL\Documents\Visual Studio 2013\Projects\Chakana saving and credit\Chakana saving and credit\Chakana.mdb"
Shared dbtable As DataTable
Public Shared Function loadData(query As String, Optional ReturnValue As Boolean = False)
    dbconnection = New OleDbConnection(connectionString)
    dbadapter = New OleDbDataAdapter
    dbtable = New DataTable()
    dbcommand = New OleDbCommand(query)
    dbcommand.CommandType = CommandType.TableDirect
    dbadapter.SelectCommand = dbcommand
    dbadapter.SelectCommand.Connection = dbconnection
    dbconnection.Open()
    'MsgBox("query lexecute")
    If ReturnValue = True Then
        dbadapter.Fill(dbtable)
        Return dbtable
    Else
         Return 0
    End If


End Function

结束班

函数调用传递参数查询

 query = "INSERT INTO CustomerInfo (ClientId,FirstName) VALUES ('23','abce')"
    Data.loadData(query)

对函数传递SELECT查询的其他调用工作正常但是当我尝试插入查询并且之后从访问中打开数据库时它没有结果

Answer 1

退房 OleDbTransaction.Commit Method ()和DbDataAdapter.Update Method显示如何在连接中打开和提交事务。

Answer 2

您没有执行DataTable来填充DataAdapter（因为默认情况下returnValue设置为false）加上您既不需要定义returnValue也不需要Imports System.Data.OleDb Public Class Data Shared connectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\DELL\Documents\Visual Studio 2013\Projects\Chakana saving and credit\Chakana saving and credit\Chakana.mdb" Public Shared Function loadData(query As String) As DataTable Dim dbtable As New DataTable Dim dbcommand As New OleDbCommand(query) dbcommand.Connection = New OleDbConnection(connectionString) dbcommand.CommandType = CommandType.TableDirect dbcommand.Connection.Open() dbtable.Load(dbcommand.ExecuteReader()) dbcommand.Connection.Close() Return dbtable End Function End Class填表。我建议将您的功能更改为：

{{1}}

SQL插入没有结果

2 个答案: