The CData ADO.NET Provider for Zoho CRM enables you to take advantage of the bulk load support in Zoho CRM through ZohoCRMDataAdapters. You can use the Batch API to execute related SQL data manipulation statements simultaneously. The provider translates all SQL queries in the batch into a single request.

Using the ADO.NET Batch API

Performing a batch update consists of the following basic steps:

1. Define custom parameterized SQL statements in ZohoCRMCommand objects.
2. Set the UpdatedRowSource property of the ZohoCRMCommand object to "UpdateRowSource.None".
3. Assign the ZohoCRMCommand objects to the ZohoCRMDataAdapter.
4. Add the parameters to the command.
5. Call the ZohoCRMDataAdapter's Update method. Pass in a DataSet or DataTable containing your changes.

Controlling Batch Size

Depending on factors such as the size of the request, your network resources, and the performance of the server, you may gain performance by executing several smaller batch requests. You can control the size of each batch by setting the ZohoCRMDataAdapter's UpdateBatchSize property to a positive integer.

Bulk INSERT

The following code prepares a single batch that inserts records in bulk and retrieves the new records' Ids. The example executes a batch INSERT of new DataRows, which have the "Added" state.

C#

ZohoCRMDataAdapter adapter = new ZohoCRMDataAdapter();

using (ZohoCRMConnection conn = new ZohoCRMConnection("InitiateOAuth=GETANDREFRESH;")) {
  conn.Open();
  adapter.InsertCommand = conn.CreateCommand();
  adapter.InsertCommand.CommandText = "INSERT INTO Accounts (AccountNumber) VALUES (@AccountNumber)";
  adapter.InsertCommand.UpdatedRowSource = UpdateRowSource.None;
  adapter.InsertCommand.Parameters.Add("@AccountNumber", "AccountNumber");

  DataTable batchDataTable = new DataTable();
  batchDataTable.Columns.Add("AccountNumber", typeof(string));
  batchDataTable.Rows.Add("4500");
  batchDataTable.Rows.Add("4501");
  adapter.UpdateBatchSize = 2;
  adapter.Update(batchDataTable);

  ZohoCRMCommand cmd = new ZohoCRMCommand("SELECT * FROM LastResultInfo#TEMP", conn);
  adapter = new ZohoCRMDataAdapter(cmd);
  DataTable res = new DataTable();
  adapter.Fill(res);
  foreach (DataRow row in res.Rows) 
    foreach(DataColumn col in res.Columns)
      Console.Write("{0}: {1}", col.ColumnName, row[col]);
}

VB.NET

 
Dim adapter As New ZohoCRMDataAdapter()

Using conn As New ZohoCRMConnection("InitiateOAuth=GETANDREFRESH;")
  conn.Open()
  adapter.InsertCommand = conn.CreateCommand()
  adapter.InsertCommand.CommandText = "INSERT INTO Accounts (AccountName) VALUES (@AccountNumber)"
  adapter.InsertCommand.UpdatedRowSource = UpdateRowSource.None
  adapter.InsertCommand.Parameters.Add("@AccountNumber", "AccountNumber")

  Dim batchDataTable As New DataTable()
  batchDataTable.Columns.Add("AccountNumber", GetType(String))
  batchDataTable.Rows.Add("4501")
  batchDataTable.Rows.Add("4500")
  adapter.UpdateBatchSize = 2
  adapter.Update(batchDataTable)

  Dim cmd As New ZohoCRMCommand("SELECT * FROM LastResultInfo#TEMP", conn)
  adapter = New ZohoCRMDataAdapter(cmd)
  Dim res As New DataTable()
  adapter.Fill(res)
  For Each row As DataRow In res.Rows 
    For Each col As DataColumn In res.Columns
      Console.WriteLine("{0}: {1}", col.ColumnName, row(col))
    Next
  Next
End Using

Bulk Update

A batch update additionally requires the primary key of each row to update. The following example executes a batch for all DataRow records with a "Modified" state:

C#

ZohoCRMDataAdapter adapter = new ZohoCRMDataAdapter();

using (ZohoCRMConnection conn = new ZohoCRMConnection("InitiateOAuth=GETANDREFRESH;")) { 
  conn.Open();
  adapter.UpdateCommand = conn.CreateCommand();
  adapter.UpdateCommand.CommandText = "UPDATE Accounts SET AccountNumber=@AccountNumber WHERE Id=@Id";
  adapter.UpdateCommand.Parameters.Add("@AccountNumber", "AccountNumber");
  adapter.UpdateCommand.Parameters.Add("@Id", "Id");
  adapter.UpdateCommand.UpdatedRowSource = UpdateRowSource.None; 
  DataTable batchDataTable = new DataTable();
  batchDataTable.Columns.Add("AccountNumber", typeof(string));
  batchDataTable.Rows.Add("4500");
  batchDataTable.Rows.Add("4501");
  adapter.UpdateBatchSize = 2;
  adapter.Update(dataTable);
}

VB.NET

 
Dim adapter As New ZohoCRMDataAdapter()

Using conn As New ZohoCRMConnection("InitiateOAuth=GETANDREFRESH;")
  conn.Open()
  adapter.UpdateCommand = conn.CreateCommand()
  adapter.UpdateCommand.CommandText = "UPDATE Accounts SET AccountNumber=@AccountNumber WHERE Id=@Id"
  adapter.UpdateCommand.Parameters.Add("@AccountNumber", "AccountNumber")
  adapter.UpdateCommand.Parameters.Add("@Id", "Id")
  adapter.UpdateCommand.UpdatedRowSource = UpdateRowSource.None
  Dim batchDataTable As New DataTable()
  batchDataTable.Columns.Add("AccountNumber", GetType(String))
  batchDataTable.Rows.Add("4501")
  batchDataTable.Rows.Add("4500")
  adapter.UpdateBatchSize = 2
  adapter.Update(dataTable)
End Using

Bulk Delete

The following code prepares a single batch that deletes records in bulk. The primary key for each row is required. The following example executes a batch for all DataRow records with a "Deleted" state:

C#

ZohoCRMDataAdapter adapter = new ZohoCRMDataAdapter();

using (ZohoCRMConnection conn = new ZohoCRMConnection("InitiateOAuth=GETANDREFRESH;")) {
  conn.Open();
  adapter.DeleteCommand = conn.CreateCommand();
  adapter.DeleteCommand.CommandText = "DELETE FROM Accounts WHERE Id=@Id";
  adapter.DeleteCommand.Parameters.Add("@Id", "Id");
  adapter.DeleteCommand.UpdatedRowSource = UpdateRowSource.None; 
  adapter.UpdateBatchSize = 2;
  adpater.Update(table);
}

VB.NET

Dim adapter As New ZohoCRMDataAdapter()

Using conn As New ZohoCRMConnection("InitiateOAuth=GETANDREFRESH;")
  conn.Open()
  adapter.DeleteCommand = conn.CreateCommand()
  adapter.DeleteCommand.CommandText = "DELETE FROM Accounts WHERE Id=@Id"
  adapter.DeleteCommand.Parameters.Add("@Id", "Id")
  adapter.DeleteCommand.UpdatedRowSource = UpdateRowSource.None 
  adapter.UpdateBatchSize = 2
  adpater.Update(table)
End Using