谁知道ConfigurationSettings.ConnectionStrings到底在哪里，头都大了！

Question

你要有app.config的文件
web的项目是web.config里面的内容是这样的
他可以取得ConnectionStrings
和appSettings.<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <connectionStrings>
    <add name ="" connectionString=""/>
  </connectionStrings>
  <appSettings>
    <add key ="" value=""/>
  </appSettings>

Answer 1

ConfigurationManager.ConnectionStrings

Answer 2

我在配置文件里设置了如下：
  <connectionStrings>
    <add name="SQL" providerName="System.Data.SqlClient" connectionString="server=(local);integrated security=SSPI;database=linyuan"/>
  </connectionStrings>

Answer 3

首先你要添加饮用
using System.Configuration;
这个饮用需要右键工程 添加饮用
如果你都设置好了
那么你取得这样取得就可以 按照你的配置文件
ConfigurationManager.ConnectionStrings["SQL"]；

Answer 4

老大些我用ConnectionStringSettings s = ConfigurationSettings.ConnectionStrings[connectstring_name]; 
是为了
DbProviderFactory factory = DbProviderFactories.GetFactory(s.ProviderName);不是要获取SqlConnection,来点有建设性的好不好

Answer 5

镇不知道你怎么看的ConnectionStringSettings css = ConfigurationManager.ConnectionStrings["Access"];
                                   dbFactory = DbProviderFactories.GetFactory("System.Data.OleDb");            DbConnection conn = dbFactory.CreateConnection();
别告诉我不成。<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <connectionStrings>
    <add name="Access" providerName="System.Data.OleDb" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|Northwind.mdb"/>
    <add name="SqlExpress" providerName="System.Data.SqlClient" connectionString="Data Source=.\SQLExpress;Integrated Security=True;User Instance=True;Database=Northwind;AttachDBFilename=|DataDirectory|Northwind.mdf"/>
  </connectionStrings>
  <appSettings>
    <add key="Connection" value="Access"/>
  </appSettings>
</configuration>

Answer 6

楼主你用了WINDOWS身份认证。。你改为SQL SERVER身份认证试试。
Web.config
<configuration> 
   <appSettings> 
     <add key="ConnectionString" value="server=.;database=Northwind;uid=sa;pwd=;"/> 
   </appSettings> 
</configuration>

Answer 7

 string connectionString = System.Configuration.ConfigurationManager.AppSettings["ConnectionString"].ToString();

Answer 8

配置文件里面的.. XML..