主题：晕死了，升级后程序代码出错

仔细检查了，之前登录没有问题，也没有改变任何代码...

出错代码如下

 

此主题相关图片如下：qq图片20130824182351.jpg

Dim dr As DataRow
Dim Ok As Boolean
Dim zhanghao As String = e.Form.Controls("账号1").Value
Dim mima As String = e.Form.Controls("密码1").Value
If zhanghao = Nothing Then
    MessageBox.Show("请输入您的登录账号!", "错误提示!",MessageBoxButtons.OK,MessageBoxIcon.Information)
    e.Cancel = True
ElseIf mima = Nothing Then
    MessageBox.Show("请输入您的登录密码!", "错误提示!",MessageBoxButtons.OK,MessageBoxIcon.Information)
    e.Cancel = True
Else
    DataTables("用户表").LoadFilter= "[ID] = '" & zhanghao & "'"
    DataTables("用户表").Load
    dr = DataTables("用户表").Find("[ID] = '" & zhanghao & "'")
    If dr Is Nothing Then
        Messagebox.show("登陆账号和密码不一致!","错误提示",MessageBoxButtons.OK,MessageBoxIcon.Information)
        e.Cancel = True
    ElseIf dr("密码") <> MD5Encrypt(mima) Then
        Messagebox.show("登陆账号和密码不一致!","错误提示",MessageBoxButtons.OK,MessageBoxIcon.Information)
        e.Cancel = True
    ElseIf dr("离职") = True Then
        Messagebox.show("该账号已经被锁定,禁止登录!","错误提示",MessageBoxButtons.OK,MessageBoxIcon.Information)
        e.Cancel = True
    ElseIf dr("ID")="FS0000"
        Dim n As WinForm.TextBox = e.Form.Controls("账号1")
        SaveConfigValue("Username",n.Text)
        basemainform.visible=False
        e.Form.close
    Else
        Dim n As WinForm.TextBox = e.Form.Controls("账号1")
        SaveConfigValue("Username",n.Text)
        e.Form.BaseForm.Hide()
        e.Form.close
        Forms("主界面").Open()
    End If
End If