-----------请问一下这几天看书遇见的初级问题-----------
1)command 中ExecuteReader ExecuteNonQuery 两者的区别 返回值 感觉两个都一样 能举个实例吗?
ExecuteScalar返回查询所返回的结果集中第一行的第一列 感觉没有用处吧???
==============================================================
2)Global.asax中 why?怎么会出错呢?!
Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
Response.Write("Application is Starting...")
' 在应用程序启动时激发
End Sub
Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs)
Response.Write("Session is Starting...")
Session.Timeout = 1
' 在会话启动时激发
End Sub
响应在此上下文中不可用。
Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
行 32: Response.Write("Application is Starting...")
行 33: ' 在应用程序启动时激发
行 34: End Sub
======================================================================
3)for(int i=0;i<4;i++)
{
htmltext.Replace("$htmlformat["+i+"]",format[i]);
}
+i+ 什么意思?! C#还是C++ ???