Use the adapter's Update method to update the data. This overloaded method can take a DataTable as a parameter and will commit all the changes made to the data source. The name of the data table can be passed as an argument and can also be used to update the entire dataset in a more traditional manner. When using a data table as an argument to the Update method, the adapter evaluates the changes that have been made to the data table and executes the appropriate command for each row (INSERT, UPDATE, or DELETE).

The example below updates the personal.name.last of one of the NorthwindOData entries.

C#

using (RESTConnection connection = new RESTConnection(connectionString)) {
  RESTDataAdapter dataAdapter = new RESTDataAdapter(
    "SELECT personal.name.first, personal.name.last FROM NorthwindOData", connection);

  dataAdapter.UpdateCommand = new RESTCommand(
    "UPDATE NorthwindOData SET personal.name.last = @personal.name.last " +
    "WHERE Id = @Id", connection);
 
  dataAdapter.UpdateCommand.Parameters.Add(new RESTParameter("@personal.name.last", DbType.String, "personal.name.last"));
  dataAdapter.UpdateCommand.Parameters.Add(new RESTParameter("@Id", DbType.String, "Id"));
  dataAdapter.UpdateCommand.Parameters[1].SourceVersion = DataRowVersion.Original;

  DataTable table = new DataTable();
  dataAdapter.Fill(table);

  DataRow firstrow = table.Rows[0];
  firstrow["personal.name.last"] = "Ana Trujilo";

  dataAdapter.Update(table);

  Console.WriteLine("Rows after update.");
  
  foreach (DataRow row in table.Rows) {
    Console.WriteLine("{0}: {1}", row["personal.name.first"], row["personal.name.last"]);
  }
}

VB.NET

Using connection As New RESTConnection(connectionString)
  Dim dataAdapter As New RESTDataAdapter(
    "SELECT personal.name.first, personal.name.last FROM NorthwindOData", connection)
  
  dataAdapter.UpdateCommand = New RESTCommand(
    "UPDATE NorthwindOData SET personal.name.last = @personal.name.last " +
    "WHERE Id = @Id", connection)
  
  dataAdapter.UpdateCommand.Parameters.Add(new RESTParameter("@personal.name.last", DbType.String, "personal.name.last"))
  dataAdapter.UpdateCommand.Parameters.Add(new RESTParameter("@Id", DbType.String, "Id"))
  dataAdapter.UpdateCommand.Parameters(1).SourceVersion = DataRowVersion.Original
  
  Dim table As New DataTable()
  dataAdapter.Fill(table)
  
  Dim firstrow As DataRow = table.Rows(0)
  firstrow("personal.name.last") = "Ana Trujilo"
  
  dataAdapter.Update(table)
  
  Console.WriteLine("Rows after update.")
  
  For Each row As DataRow In table.Rows
    Console.WriteLine("{0}: {1}", row("personal.name.first"), row("personal.name.last"))
  Next
End Using