Check required Paramters from SqlCommant Text in ASP.Net

How to check the reqired parameters and the add those parameter to sql command

i have sql command string

string sql_command = select * from table where name = @name and id = @id and value = @value

now i want to identify which parameter to add in sql command like

for (int i = 0; i < parameterNames.Length; i++)
{
    cmd.Parameters.Add("@name");
}

parameterNames???