How do constitute a parameter string for a stored procedure

I have a c# application in which i need to read datat from a postgresql database
using Dapper.

I have my parameter field names from the stored procedure and the value
i want to pass in from the application. They are stated below:  I have tested the store procedure
with the parameter values and it worked


PARAMETER NAME   VALUE
locationidx                     "x"
locdescription                "x"
companycodex              "NAUTILUS"
idx                                 0
dowhatx                        "AR"

The Line calling the method from my c# application is shown below

 newList2 = NewDataAccess.ReadData<LocationModel>("public.splocationcode_getall", r);

The called method is shown below

[code]public static List<T> ReadData<T>(string sql, object p)
        {
            // var output = default(List<T>);   //This will return null in the case of an exception.
            var output = new List<T>();        // If you want to return an empty list instead, use this
            try
            {
                using (var conn = new NpgsqlConnection(LoginDetails.staticconnectionstring))
                {
                    output = conn.Query<T>(sql, p, commandType: CommandType.StoredProcedure).ToList();

                }

                //using (var conn = new NpgsqlConnection(LoginDetails.staticconnectionstring))
                //{
                //    output = conn.Query<T>(sql, new {locationidx = "x", locdescriptionx = "x", companycodex = "NAUTILUS",idx = 0,dowhatx = "AR" }, commandType: CommandType.StoredProcedure).ToList();

                //}

            }
       }[/code]

I need to get  parameter r constituted exactly as

locationidx = "x", locdescriptionx = "x", companycodex = "NAUTILUS",idx = 0,dowhatx = "AR"

with all quotation marks and commas in place .

If I the pass it into the method  as object p then my ReadData  would work correctly.

The portion of the method that is commented out shows a manually  constituted  r
parameter  that worked.

The problem i have is  how to constitute  the r parameter   from my c# application given that i know all the parameter names and their values as stated above.

I will be grateful for any assistance

Olukay