小编Cra*_*ide的帖子

下面是我的MsgBox代码." 是"按钮正在工作,但是当我单击" 否"或" 取消"时,它仍然会删除数据...

        strup = "DELETE FROM student WHERE urno =" & CInt(txtUrn.Text) & ";"
        Dim command As New OleDb.OleDbCommand(strup, con)
        MsgBox("Do you want to delete record(s)", MsgBoxStyle.YesNoCancel, "Confirm Delete")
        command.ExecuteNonQuery()
        con.Close()

单击" 否"或" 取消"时如何取消删除操作？

当我尝试在这三个字段中插入数据时,在INSERT INTO语句中出现错误说错误.但是当只保存在第一个字段sname时它会被添加,但是当添加其他两个获取此错误时,我在INSERT INTO语句检查下面的任何建议中获得异常？

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    Try
        Dim dbprovider As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\Taher\Documents\Visual Studio 2010\Projects\WindowsApplication1\WindowsApplication1\Database1.accdb;Persist Security Info=False;"
        Me.con = New OleDb.OleDbConnection()
        con.ConnectionString = dbprovider
        con.Open()

        Dim sqlquery As String = "INSERT INTO admin (sname,username,password)" + "VALUES ('" & txtname.Text & "','" & txtuser.Text & "','" & txtpass.Text & "');"
        Dim sqlcommand As New OleDb.OleDbCommand(sqlquery)
        With sqlcommand
            .CommandText = sqlquery
            .Connection = con
            .ExecuteNonQuery()
            con.Close()
        End With
        MsgBox("User Registered")
    Catch ex …