Asp. The conversion between DataTable and dataset in net example _ practical Tips

The dataset contains multiple DataTable, and a constraint relationship between the DataTable.
If your data does not need to do relational mapping, it is more efficient to use DataTable directly. If there is a relationship query that needs to be 1:n or n:m, populate the corresponding DataTable in the dataset, and then use the relational query data.

DataSet data source you can think of it as a database, and a DataTable is a table in a database.

To add a DataTable to a dataset:

When a DataTable is encountered in a project and cannot be converted directly to a dataset,

You can start new.
We can just get the new DataSet C and fill it out.
DataSet ds = new DataSet ();
DataTable dt= New DataTable ("Customers");

Ds. Tables.add (DT);

To read a DataTable in a dataset:

Dt=ds. tables[0];//Specify table No. 0

Dt=ds. tables["Customers"];//specify table with table named "Customers"