WPF配置文件添加

 1、添加app.config文件

 

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <connectionStrings>
        <add name="dbstrConn" connectionString="Data Source=127.0.0.1;Initial
  Catalog=demo;User ID=sa;Password=abc123456"/>
    </connectionStrings>
</configuration>

 2、引用system.configuration

 3、声明变量strconn

string strconn = ConfigurationManager.ConnectionStrings["dbstrConn"].ConnectionString;
 using (SqlConnection conn = new SqlConnection(strconn))
            {

            }