Updating Database From Dataset?

Question

I wanna update my database from my dataset.

mydataadapter = new MySqlDataAdapter("SELECT * FROM table0; SELECT * FROM table1; SELECT * FROM table2;", con);

myda.Fill(dataset);
//......
// for example I'm doing a change like this
ds.Tables[2].Rows[1][3] = "S";

//Then updating the database
MySqlCommandBuilder com = new MySqlCommandBuilder(mydataadapter);
mydataadapter.Update(dataset, "table2");

then it returns this error

TableMapping['table2'] or DataTable 'table2' didn't find by Update.

Do you have any advice?

Answer 1

The DataAdaptor does not know about table2, only a 3rd recordset (loaded into ds.Tables[2])

You need a table mapping to do this.

Edit: You have an UpdateCommand, right?

Answer 2

try this http://www.codeguru.com/csharp/.net/net_data/datagrid/article.php/c13041

Answer 3

Not an answer, but if this is for a real production application, then in my opinion, dump the dataset mentality and get a real ORM, so you can work with actual objects and save them properly. Use Entity Framework, Linq-to-SQL, NHibernate, anything but datasets. Once you do that, you'll find it much easier in the long term to retrieve and save data.

In the meantime, I'd go with gbn's answer.