这个问题究竟怎么解决啊？
网页连入数据库后在浏览器预览时就产生下面问题：
System.Exception:   This   page   has   a   MM:DataSet,   MM:Insert,   MM:Update   or   MM:Delete   tag   with   a   null   or   empty   value   for   the   ConnectionString   and   DatabaseType   attributes.  

Often,   such   values   come   from   application   settings   in   the   web.config   file.   That   file   might   be   missing   from   the   server   executing   this   page.   Or,   it   might   be   missing   the   particular   add   key   tags   for   the   database   connection   this   page   uses.   If   you   are   using   Dreamweaver,   look   for   the   web.config   file   in   the   local   root   folder   of   your   Dreamweaver   site.   Once   you   find   this   file,   you   can   either:
Put   this   file   onto   the   server   that   is   executing   this   page.
Copy   the   add   key   tags   from   the   web.config   in   the   local   root   folder   of   your   Dreamweaver   site   and   paste   them   into   the   web.config   file   in   the   server   that   is   executing   this   page.

at   DreamweaverCtrls.DataSet.DoInit()
在我电脑里就搜索不到Web.config文件，有没有办法？

------解决方案--------------------
如果找不到Web.config这个文件，试着从其他机器上拷贝一个放到你的Dreamweaver 网站的根目录中。