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 CompanyName of one of the [CData].[Sample].Customers entries.

C#

using (MongoDBConnection connection = new MongoDBConnection(connectionString)) {
  MongoDBDataAdapter dataAdapter = new MongoDBDataAdapter(
    "SELECT City, CompanyName FROM [CData].[Sample].Customers", connection);

  dataAdapter.UpdateCommand = new MongoDBCommand(
    "UPDATE [CData].[Sample].Customers SET CompanyName = @CompanyName " +
    "WHERE _id = @_id", connection);
 
  dataAdapter.UpdateCommand.Parameters.Add(new MongoDBParameter("@CompanyName", DbType.String, "CompanyName"));
  dataAdapter.UpdateCommand.Parameters.Add(new MongoDBParameter("@_id", DbType.String, "_id"));
  dataAdapter.UpdateCommand.Parameters[1].SourceVersion = DataRowVersion.Original;

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

  DataRow firstrow = table.Rows[0];
  firstrow["CompanyName"] = "Jon Deere";

  dataAdapter.Update(table);

  Console.WriteLine("Rows after update.");
  
  foreach (DataRow row in table.Rows) {
    Console.WriteLine("{0}: {1}", row["City"], row["CompanyName"]);
  }
}

VB.NET

Using connection As New MongoDBConnection(connectionString)
  Dim dataAdapter As New MongoDBDataAdapter(
    "SELECT City, CompanyName FROM [CData].[Sample].Customers", connection)
  
  dataAdapter.UpdateCommand = New MongoDBCommand(
    "UPDATE [CData].[Sample].Customers SET CompanyName = @CompanyName " +
    "WHERE _id = @_id", connection)
  
  dataAdapter.UpdateCommand.Parameters.Add(new MongoDBParameter("@CompanyName", DbType.String, "CompanyName"))
  dataAdapter.UpdateCommand.Parameters.Add(new MongoDBParameter("@_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("CompanyName") = "Jon Deere"
  
  dataAdapter.Update(table)
  
  Console.WriteLine("Rows after update.")
  
  For Each row As DataRow In table.Rows
    Console.WriteLine("{0}: {1}", row("City"), row("CompanyName"))
  Next
End Using