Configuration 无法分配连接字符串值

我收到以下错误，请帮助。 C#代码

App.Config

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这通常是因为您无法访问字段初始值设定项中的con，它是非静态的

SqlConnection conec = null; 
string s2 = System.Configuration.ConfigurationManager.ConnectionStrings["conec"].ToString();
public constructor()
{
       conec = new SqlConnection(s2);
}

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像上面那样试试。会有用的。

非常感谢。它帮助了我：）

<add name="conec" connectionString ="Integrated Security=SSPI;Persist Security                         Info=False;Initial Catalog=PACS_ENG_NEW;Data Source=HCL-68\SQLEXPRESS"/>

Error   1   A field initializer cannot reference the non-static field, method, or property 'PDS1.frm_sales.s2'  C:\Documents and Settings\admin\My Documents\Visual Studio 2008\Projects\PDS1\PDS1\Sales.cs 28  47  PDS1

SqlConnection conec = null; 
string s2 = System.Configuration.ConfigurationManager.ConnectionStrings["conec"].ToString();
public constructor()
{
       conec = new SqlConnection(s2);
}