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  • sqlhelper

    附上连接字符串//Data Source=.; Initial Catalog=Mytest;User ID=sa;Password=//

    附上声明那一臭长段子//

    private static string constring =
    ConfigurationManager.ConnectionStrings["Constr"].ConnectionString//

    class sqlhelper
        {
            private static string connstring = ConfigurationManager.ConnectionStrings["connstr"].ConnectionString;
            public static int ExecuteNoquery(string sql, params SqlParameter[] parameters)
            {
                using (SqlConnection conn = new SqlConnection(connstring))
                {
                    conn.Open();
                    using (SqlCommand cmd = conn.CreateCommand())
                    {
                        cmd.CommandText = sql;
                        cmd.Parameters.AddRange(parameters);
                        return cmd.ExecuteNonQuery();
                    }
                }
            }
            public static object Executescalar(string sql, params SqlParameter[] parameters)
            {
                using (SqlConnection conn = new SqlConnection(connstring))
                {
                    conn.Open();
                    using (SqlCommand cmd = conn.CreateCommand())
                    {
                        cmd.CommandText = sql;
                        cmd.Parameters.AddRange(parameters);
                        return cmd.ExecuteScalar();
                    }
                }
            }
            public static DataTable ExecuteDatatable(string sql, params SqlParameter[] parameters)
            {
                using (SqlConnection conn = new SqlConnection(connstring))
                {
                    conn.Open();
                    using (SqlCommand cmd = conn.CreateCommand())
                    {
                        cmd.CommandText = sql;
                        cmd.Parameters.AddRange(parameters);
                        DataSet dataset = new DataSet();
                        SqlDataAdapter dataadapter = new SqlDataAdapter(cmd);
    
                        dataadapter.Fill(dataset);
                        return dataset.Tables[0];
                    }
                }
            }
        }
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  • 原文地址:https://www.cnblogs.com/zhanying/p/3398297.html
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