Asp.net 如何编写SQL连接字符串？

我将此作为我的连接字符串属性：

Data Source="c:\users\perdanny\documents\visual studio 2012\Projects\WebApplication1\WebApplication1\App_Data\Users.sdf"

现在，我应该如何在代码中编写它：

sqlConnection = new SqlConnection(???);

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使用ConfigurationManager和

请看下面的代码行：

string connectionString = ConfigurationManager.ConnectionStrings["ApplicationServices"].ConnectionString;

试试这个：

string strConnection = ConfigurationManager.ConnectionStrings["Name of connection string key"].ConnectionString;  

// Or, for a quick test you could also use
// string strConnection = "Data Source = c:\\users\\perdanny\\documents\\visual studio 2012\\Projects\\WebApplication1\\WebApplication1\\App_Data\\Users.sdf"     

  using (var conn = new SqlCeConnection(string.Format("Data Source={0}", strConnection)))
  {
     conn.Open();

     try
     {
         System.Data.SqlServerCe.SqlCeCommand cmd = System.Data.SqlServerCe.SqlCeCommand;
         cmd.CommandType = System.Data.CommandType.StoredProcedure;
         cmd.CommandText = "Your sql stored proc name";
         cmd.Connection = conn ;
         cmd.ExecuteNonQuery();     
     }
     catch (SqlCeException)
     {
         throw;
     }
     finally
     {
         if (conn.State == ConnectionState.Open) conn.Close();
     }
  }

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字符串connStr=ConfigurationManager.connectionString[connectionString].ToString

<add name="connectionString" connectionString="Data Source=SQLEXPRESS;Initial Catalog=dbsql;User ID=hello;Password=hello"
      providerName="System.Data.SqlClient" />

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以前也问过类似的问题：如果您有一个sdf文件而不是SQL Server数据库，那么很可能您想要的是SQLCeConnection而不是SQLConnection。