configString出错，帮帮忙。。

[levinstong]

这个是config文件里面的
<appSettings/>
<connectionStrings>
<add key="constr" value="Data Source=.;Initial Catalog=sooomo;User ID=sa;Password="></add>
</connectionStrings>
<system.web>



在cs文件中我是这么初始化的
string conn = System.Configuration.ConfigurationManager.AppSettings["constr"].ToString();



可以运行时出现异常了

异常详细信息: System.NullReferenceException: 未将对象引用设置到对象的实例。

[dengchenlu]

你获取的是AppSettings

<appSettings/> 
<add key="constr" value="Data Source=.;Initial Catalog=sooomo;User ID=sa;Password="> </add> 
</appSettings>
<connectionStrings/> 

[wiki14]

<connectionStrings>
<add name="constr" connectionString="Data Source=.;Initial Catalog=sooomo;User ID=sa;Password=" />
</connectionStrings>

string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;

[wiki14]

<connectionStrings>
<add name="constr" connectionString="Data Source=.;Initial Catalog=sooomo;User ID=sa;Password=" />
</connectionStrings>

string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;

[ivws_19]

一二楼都正解

[levinstong]

[Quote=引用 3 楼 wiki14 的回复:]
  <connectionStrings>
    <add name="constr" connectionString="Data Source=.;Initial Catalog=sooomo;User ID=sa;Password=" />
  </connectionStrings>

        string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;

[/Quote]
name改成key,connectionString改成value这样不行吗

[wiki14]

[Quote=引用 5 楼 levinstong 的回复:]
引用 3 楼 wiki14 的回复:
  <connectionStrings>
    <add name="constr" connectionString="Data Source=.;Initial Catalog=sooomo;User ID=sa;Password=" />
  </connectionStrings>

        string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;


name改成key,connectionString改成value这样不行吗

[/Quote]


你获取的是AppSettings.
我获取的是connectionStrings.

都可以的撒~