Question

When I try to insert a string value using mdmysql.Parameters.AddWithValue it generates an input format string exception. Following is the code which produces the error:

cmdmysql.Parameters.AddWithValue("@p_mode", MySqlDbType.VarChar).Value = "ccc";

I tried with varchar, string, text but nothing is working. Also if I put null in place of “ccc” then the record gets inserted into the table. The variable type for p_mode in table is varchar. What is the reason for this exception?

Answer 1

The AddWithValue function takes only two inputs, 1. The parametername and 2. the value

cmdmysql.Parameters.AddWithValue("@p_mode", "ccc");

If you want to use the definition of types you must use the normal Add function:

cmdmysql.Parameters.Add("@p_mode", MySqlDbType.VarChar).Value = "ccc";

I would guess that the exception comes from your second input where you parse an MySqlDbType to the function and not the acutal value you want the returned mysqlparameter to have.