数据库连接串问题

Question

using System.Configuration;
string strConnection=(string)configurationSettings.appsettings["SQLConnectionString"];

Answer 1

你有没有using System.Configuration?

Answer 2

Configuration是你自己做的吗？用using

Answer 3

加using System.Configuration就OK了

Answer 4

System.Configuration.ConfigurationSettings.AppSettings["SQLConnectionString"].ToString();

Answer 5

string strConnection= ConfigurationSettings.AppSettings["SQLConnectionString"];
SqlConnection objConnection = new SqlConnection(strConnection);
注意大小写，ASP.NET是区分大小写的！

Answer 6

Web.config里面这样写:
<appSettings>
     <add key="SQLConnectionString" value="server=localhost;user id=sa;password=sa;initial catalog=universitysystem;" />
</appSettings>在程序中这样引用:
string strConnection=System.Configuration.ConfigurationSettings.AppSettings["SQLConnectionString"].ToString();SqlConnection objConnection = new SqlConnection(strConnection);

Answer 7

System.Configuration.ConfigurationSettings.AppSettings[""]如此就好你没有引用NameSpace