Create a dateset and add columns to it
DataSet dsClass = new DataSet ();
DataTable dtClass = new DataTable ("Class ");
DataColumn name = new DataColumn ("name", typeof (string); // Add a column name
DataColumn url = new DataColumn ("url", typeof (string ));
DtClass. Columns. Add (name );
DtClass. Columns. Add (url );
DtClass. Rows. Add (new object [] {"c", "d "});
DsClass. Tables. Add (dtClass );
Dataset merge with the same two columns
Dataset dss;
Dataset ds;
If (dss. Tables [0]. Rows. Count> 0)
{
Foreach (DataRow dr1 in dss. Tables [0]. Rows)
{
Ds. Tables [0]. ImportRow (dr1 );
}
}
Return ds;
Create a column for The created dataset and assign a value
DataSet dss = new DataSet ();
Try
{
Con. Open ();
Da. Fill (dss, "table1 ");
Con. Close ();
Dss. Tables [0]. Columns. Add ("mark", typeof (string); // Add a new field
Foreach (DataRow col in dss. Tables [0]. Rows)
{
Col ["mark"] = getFocus (); // assign a value to the newly added value
}