主题：[求助]请求解决

按照帮助做的自定义登录，提示出错，不明那里错，请帮忙解决给与解释

很简单，控件是DropdownBox，你却把这个控件赋值给一个ComboBox型的变量。

Dim cmd As New SQLCommand
Dim dt As DataTable
Dim cmb As WinForm.ComboBox = e.Form.Controls("UserName")
cmd.C
cmd.CommandText = "SELECT DISTINCT Name From {Users}"
dt = cmd.ExecuteReader()
For Each dr As DataRow In dt.Datarows
    cmb.Items.Add(dr("Name"))
Next
cmb.SelectedIndex = 0 

狐爸看下改哪里？我把ComboBox改为DropdownBox还是报错

 

Dim cmb As WinForm.ComboBox = e.Form.Controls("UserName")

 

改为：

 

Dim cmb As WinForm.DropDownBox = e.Form.Controls("UserName")

 

最好看看：

http://www.foxtable.com/help/topics/1485.htm

 

 

如果不改代码，将控件中UserName这个控件删除，改为用ComboBox

明白了，原来控件选择错误。多谢狐爸