Bug #47467 Two simple changes for DataReader

Description:
Add to MySqlDataReader one function, and change other to return useful Exception
1. GetFieldType with column name
2. GetOridinal - return what name of not fouund column

How to repeat:
Use MySQLDataReader to fetch data from MySQL Database

Suggested fix:
1. GetFieldType with column name:

	public override double GetFieldType(string column)
		{
			return GetFieldType(GetOrdinal(column));
		}

datareader.cs, line 439

2. GetOridinal - return what name of not-fouund column:

            throw new IndexOutOfRangeException(Resources.CouldNotFindColumnName + ":" +name);

ResultSet.cs, line 114

I think that this two simple changes can make the DataReader more useful and more simple to use.

Hi Moshe and thanks for your reasonable feature request.

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/103042

801 Reggie Burnett	2010-03-11
      - added two requested features -- MySqlDataReader.GetFieldType(string columnname) &
        MySqlDataReader.GetOrdinal() includes the name of the column in the exception when not found
        (bug #47467)

fixed in 6.0.6, 6.1.4, 6.2.3, and 6.3.2+

A 'change' entry has been added to changelogs 6.0.6, 6.1.4, 6.2.3, 6.3.2:

MySQL Connector/NET has been changed to include MySqlDataReader.GetFieldType(string columnname). Further, MySqlDataReader.GetOrdinal() now includes the name of the column in the exception if the column is not found.