Question

我在ALTER TABLE等方面遇到语法错误请提前帮助谢谢:) Visual Basic

Dim cnn As New OleDb.OleDbConnection
    cnn = New OleDb.OleDbConnection
    cnn.ConnectionString = ("Provider=Microsoft.ACE.OLEDB.12.0;Data     Source=D:\Users\Ashe\Documents\Visual Studio 2010\Projects\WindowsApplication1\Guidance System.accdb")
    Dim mydate As DateTime
    mydate = Me.DateTimePicker1.Value

   Dim AddCol = "ALTER TABLE Attendance " & _
          "ADD '" & mydate & "');"

    Using cmd = New OleDbCommand(AddCol, cnn)
        cnn.Open()
        cmd.ExecuteNonQuery()
    End Using

Answer 1

您尚未关闭字符串

 {"location":"Web","initial":"","firmType":"","toaxfrtype":""}

注意：在发布最后一条评论后添加了Dim cnn As New OleDb.OleDbConnection cnn = New OleDb.OleDbConnection cnn.ConnectionString = ("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\Users\Ashe\Documents\Visual Studio 2010\Projects\WindowsApplication1\Guidance System.accdb") Dim mydate As DateTime mydate = Me.DateTimePicker1.Value Dim AddCol = "ALTER TABLE Attendance " & _ "ADD '" & mydate & "' varchar(100);" Using cmd = New OleDbCommand(AddCol, cnn) cnn.Open() cmd.ExecuteNonQuery() End Using，以便在此处获得有效的代码。

Answer 2

我想出了这个代码，它现在正在运行。谢谢你们！：）

if ($this->request->is('post')) {
    $a = $_POST['category'];
    $b = $_POST['subcategory'];
    $c = $_POST['category1'];
    $d = $_POST['subcategory1'];
    // i have checked whether values are comming to controller r not

    echo $a;

    echo $b;

    echo $c;

    echo $d;
    //They are comming 

    // I have category and subcategory columns in my databse

    // I want to store $a and $b in one row ,$c and $d values in the next row of my database . 

    // I have written like this


    $this->Bill->create();
    if ($this->Bill->save($this->request->data)) {
        $this->Bill->saveField('category',$a);
        $this->Bill->saveField('subcategory',$b);
        $this->Bill->saveField('category',$c);
        $this->Bill->saveField('subcategory',$d);
            $this->Session->setFlash(__('The Bill has been saved'));
            return $this->redirect(array('controller' => 'Bills','action' => 'view'));
    }
    $this->Session->setFlash(__('The bill could not be saved'));*/
}
// but $c and $d  values are only storing  in row.

在我的数据库中添加DateTime作为新列

2 个答案: