仅获取列名列表

Question

I've been looking around the Internet for quite some time now, but I can't find a way to get a list of just column names. I don't care about the data each column has.

I want to take that list and compare it against a collection. I'm using the VB.NET MySqlConnector. I'm new to using the connector.

Edit:

Dim mscCMD As MySqlCommand = New MySqlCommand("SHOW COLUMNS FROM OCN.cpu", msc)
            Dim sqlReader As MySqlDataReader = mscCMD.ExecuteReader()
            Dim b As Integer = 0
            Dim c As Integer = 0
            While sqlReader.Read
                msProjects(c) = sqlReader.**Item**(b)
                b += 1
                c += 1
            End While

Never mind, I figured it out. I had to choose Item, not getName.

Edit: Perhaps I didn't just yet. It's reading one row. I'm unsure how to move to the next row. For example

mysql> SHOW COLUMNS FROM City;
+------------+----------+------+-----+---------+----------------+
| Field      | Type     | Null | Key | Default | Extra          |
+------------+----------+------+-----+---------+----------------+
**Id         | int(11)  | NO   | PRI | NULL    | auto_increment**
| Name       | char(35) | NO   |     |         |                |
| Country    | char(3)  | NO   | UNI |         |                |
| District   | char(20) | YES  | MUL |         |                |
| Population | int(11)  | NO   |     | 0       |                |
+------------+----------+------+-----+---------+----------------+
5 rows in set (0.00 sec)

That's the row it reads it reads. Once you go past the 5th item, you're out of bounds.

Answer 1

You can use the metadata from a result set:

         final ResultSet rs = statement.executeQuery("SELECT * FROM `" + tableName +"` LIMIT 0,1;");
         final ResultSetMetaData metaData = rs.getMetaData();
         for(int i=1; i<metaData.getColumnCount(); i++)
         {
             System.out.println("" + metaData.getColumnName(i));
         }

Also, you can get the java.sql.Types column type the same way.

Answer 2

Got it. Found the answer from a MS KB article.

https://support.microsoft.com/en-us/kb/310108

For Each myField In schemaTable.Rows
    'For each property of the field...
     For Each myProperty In schemaTable.Columns
        'Display the field name and value.
         Console.WriteLine(myProperty.ColumnName & " = " & myField(myProperty).ToString())
     Next
     Console.WriteLine()

     'Pause.
     Console.ReadLine()
Next

Specifically myField(myProperty).ToString will get you the column names. It will also contain other things about the column. You will have to sort through it, but all the column names from your table will be in there.