Use the simplest and most effective code in C # To execute the stored procedure and return data

The stored procedure p_sys_Login is defined as follows: Create procedure p_sys_Login @ ArgUserID varchar (20), -- User Name @ ArgPassword varchar (20), -- Password @ ArgResult varchar (50) OUTPUT -- logon result AS /* ...... */   The following shows how to use the most concise and effective code in C # To execute the stored procedure and return data: /// <Summary> /// User Logon Verification /// </Summary> /// <Param name = "userID"> User name </param> /// <Param name = "password"> password </param> Public void Login (string userID, string password) { // The database connection string is stored in Web. config. String cnnString = ConfigurationSettings. etettings ["ConnectionString"]; SqlConnection cnn = new SqlConnection (cnnString );   // String SQL = string. Format ("EXEC p_sys_Login {0}, {1}, @ Result OUTPUT ", UserID, password ); SqlCommand cmd = new SqlCommand (SQL, cnn );   // Create and add parameters corresponding to "@ Result OUTPUT" SqlParameter paramResult = new SqlParameter ("@ Result", SqlDbType. VarChar, 50 ); ParamResult. Direction = ParameterDirection. Output; Cmd. Parameters. Add (paramResult );   Cnn. Open (); Cmd. ExecuteNonQuery (); Cnn. Close ();   // Obtain the results returned by the Stored Procedure String result = paramResult. Value. ToString ();   //...... }

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