转自: http://www.cnblogs.com/zhucl1006/archive/2008/04/02/1134150.html
<asp:TextBox ID="ttel2" runat="server" Width="95%" Text='<%$AppSettings:DefualtV_Tel%>' onFocus=OnEnter(this) onBlur=OnExit(this)></asp:TextBox>
假如是html控件,必须runat=server
此方法适用于vs2005/vs2008, 2003没试过
这种方法还可以用在资源读取,例如
<siteMapNode url="~/pages/contents/blogbooksolutions" title="$Resources:siteMap,Link42,Blogbook/BlogPrint" description="" />