右击项目中的引用--->添加引用---->把你的DBOperate.dll加进去就好了!
public class DbOperate
{
public DbOperate()
{
conn = System.Configuration.ConfigurationSettings.AppSettings["constr"].ToString();
server = StringCut(conn,"server=",";");
uid = StringCut(conn,"uid=",";");
pwd = StringCut(conn,"pwd=",";");
database = StringCut(conn,"database=",";");
}
}
是不是你的项目没有 using DBOperate???
在上面添加引用,把DBOperate.dll加进去。