未将对象引用设置到对象的实例?????????????????
老沙沙11 2014-07-07 09:34:38 namespace BookManagementDAL
{
class Sqlhelper
{
private static string connStr = ConfigurationManager.ConnectionStrings["dbConnStr"].ConnectionString;
}
}
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<connectionStrings>
<add name="dbConnStr" connectionString="Data Source=.;Initial Catalog=BookManagement;User ID=sa;Password=nash"/>
</connectionStrings>
</configuration>