没有直接的属性可以做到这一点.但是您可以通过设置以下属性来实现，

There is no direct property to do that. But you can do it by setting attributes like below,

DropDownList1.Attributes.Add("Size", "10");

如果有帮助，请将其标记为答案

Mark it as answer if it is helpful

请阅读这篇文章...

它会为您使用全部....

http://blogs.msdn.com/b/rakkimk/archive/2011/05/02/dropdownlist-html-select-vertical-scrollbar-number-of-items.aspx [ http://forums.asp.net/t/1226413.aspx [

Please Read this articals...

it will use full for you....

http://blogs.msdn.com/b/rakkimk/archive/2011/05/02/dropdownlist-html-select-vertical-scrollbar-number-of-items.aspx[^]

http://forums.asp.net/t/1226413.aspx[^]

请参阅:

限制下拉列表中的第页. "target =" _ blank"title ="新窗口> ^ ]

http://forums.devshed.com/net-development-87/how-to-limit-the-number-of-items-to-display-in-307319.html [

See this:

Limit the no.of items in dropdown list[^]

http://forums.devshed.com/net-development-87/how-to-limit-the-number-of-items-to-display-in-307319.html[^]