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How to call mysql stored procedure in C#

I want to call a Mysql stored procedure from c# . I am running the same procedure in mysql query browser finely . This is about getting a maturity date from given input year , month , days with current date . This is the output

      DELIMITER $$

         DROP PROCEDURE IF EXISTS `passbook`.`maturity_date` $$
         CREATE DEFINER=`root`@`localhost` PROCEDURE `maturity_date`(IN `stdate` 
         DATE, IN `adyear` INT(4), IN `amonth` INT(2), IN `adays` INT(2), INOUT 
         `matdate` DATE)
         NO SQL
         Begin
         declare new_date , pstdate date;

         set new_date = stdate;

          if adyear > 0 then

          SELECT date_add(stdate, INTERVAL adyear year) into pstdate;

          set new_date = pstdate;
          end if;


           if amonth > 0 then

SELECT date_add(new_date, INTERVAL amonth MONTH) into pstdate;
set new_date = pstdate;
end if;

if adays > 0 then

SELECT date_add(new_date, INTERVAL adays DAY) into pstdate;
set new_date = pstdate;
end if;


Set matdate = new_date;
Select matdate;
end $$

DELIMITER ;

得到错误图片

try this:

            var ConnectionString="Server=myServerAddress;Database=myDataBase;Uid=myUsername;Pwd=myPassword";            
            var sqlParameters = new List<SqlParameter>();
            var storedProcedureName = "SPName";

    //add parameters with value and type here
            sqlParameters.Add(new SqlParameter { SqlDbType = SqlDbType.Int, ParameterName = "@adyear", Value = adyear});
            sqlParameters.Add(new SqlParameter { SqlDbType = SqlDbType.Int, ParameterName = "@amonth", Value = amonth});
            sqlParameters.Add(new SqlParameter { SqlDbType = SqlDbType.Int, ParameterName = "@adys ", Value = adys });

    //execute store procedure here
            using (var connection = new SqlConnection(ConnectionString))
            using (var command = new SqlCommand(storedProcedureName, connection) { CommandTimeout = 160, CommandType = commandType })
            using (var dataAdaptor = new SqlDataAdapter(command))
            {
                command.Parameters.AddRange(sqlParameters);

                connection.Open();
                dataAdaptor.Fill(dS);
            }

also you can use Mysql.Data i believe it is the easiest way to do. You don't need anything else to work with mysql database.

PM> Install-Package MySql.Data

you can store the connection string in a file. just create a file and put your connection string on it. then read it in a static class. something like this:

CS = File.ReadAllText(YourDataBaseConfigFilePath);

then use it as your connection string.

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