Visual C ++如何在MySql中查找列名

Question

I am currently using the following code to fill a combo box with the column information inside of MySql database:

private: void Fillcombo1(void){
              String^ constring=L"datasource=localhost;port=3307;username=root;password=root";
              MySqlConnection^ conDataBase=gcnew MySqlConnection(constring);
              MySqlCommand^ cmdDataBase= gcnew MySqlCommand("select * from database.combinations ;", conDataBase);
              MySqlDataReader^ myReader;

              try{
              conDataBase->Open();
              myReader=cmdDataBase->ExecuteReader();
              while(myReader->Read()){
                String^ vName;
                vName= myReader->GetString("OD");
                comboBox1->Items->Add(vName);
              }
              }catch(Exception^ex){
              MessageBox::Show(ex->Message);
              }
             }

Is there any simple method for finding the name of the column and placing it within a combo box?

Also, I am adding small details to my app such as a news feed which would need updating every so often, will I have to dedicate a full new database spreadsheet to this single news feed text so that I can updated it or is there a simpler alternative?

Thanks.

Answer 1

There may be an easier way without launching any other query but you could also use "SHOW COLUMNS" MySQL Query.

SHOW COLUMNS FROM combinations FROM database

or

SHOW COLUMNS FROM database.combinatons

Both will work.

Answer 2

An alternative is to use the DESCRIBE statement:

mysql> describe rcp_categories;
+---------------+------------------+------+-----+---------+----------------+
| Field         | Type             | Null | Key | Default | Extra          |
+---------------+------------------+------+-----+---------+----------------+
| ID_Category   | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| Category_Text | varchar(32)      | NO   | UNI | NULL    |                |
+---------------+------------------+------+-----+---------+----------------+
2 rows in set (0.20 sec)