在C＃下运行通过的程序在VB.net下出错，在于checkbox控件的。

Question

                For i = 0 To GridView1.Rows.Count - 1
                Dim chkbox As CheckBox = CType(GridView1.Rows(i).FindControl("chechbox1"), CheckBox)
                If chkbox.Checked = True Then
                    Dim str As String = "delete from info where id=" & GridView1.DataKeys(i).Value
                    Dim cmd As New OleDbCommand(str, cn)
                    cn.Open()
                    cmd.ExecuteNonQuery()
                    cn.Close()
                End If
红色为出错行：提示对象为初使化。用 new 也不行的。
在C＃下：好用
       for (int i = 0; i < GridView1.Rows.Count; i++)
        {
            CheckBox cbox = (CheckBox)GridView1.Rows[i].FindControl("CheckBox1");
            if (cbox.Checked == true)
            {
                string dele = "delete from users where userid='" + GridView1.DataKeys[i].Value + "'";
                SqlCommand cmd = new SqlCommand(dele, cn);
                cn.Open();
                cmd.ExecuteNonQuery();
                cn.Close();
               
            }           
        }

Answer 1

    For   i   =   0   To   GridView1.Rows.Count   -   1 
                                Dim   chkbox   As   CheckBox   =   CType(GridView1.Rows(i).FindControl("chechbox1"),   CheckBox) 
                                If   chkbox.Checked   =   True   Then 
                                        Dim   str   As   String   =   "delete   from   info   where   id="   &   GridView1.DataKeys(i).Value 
                                        Dim   cmd   As   New   OleDbCommand(str,   cn) //很明显这块有问题
                                        cn.Open() 
                                        cmd.ExecuteNonQuery() 
                                        cn.Close() 
                                End   If 

Answer 2

Dim   chkbox   As   CheckBox   =   CType(GridView1.Rows(i).FindControl("chechbox1"),   CheckBox) 
=====
看看后面的chechbox1是不是拼错了,估计是
Dim   chkbox   As   CheckBox   =   CType(GridView1.Rows(i).FindControl("CheckBox1"),   CheckBox)