The ADO.NET Provider for QuickBooks Online implements two classes you can use to perform CRUD (Create, Read, Update, and Delete) operations: DbDataReader and C1QuickBooksOnlineDataAdapter classes. The tabs below describe the interfaces and code implementations.
Querying With DbDataReader
The DbDataReader class can be used to fetch data in subset increments as required. It can retrieve data quicker than the C1QuickBooksOnlineDataAdapter as it retrieves data in pages. When you read data from the DbDataReader, it requests the succeeding page from the data source to load the result, which makes the data retrieval faster.
The following code example demonstrates create, read, update, and delete operations from the data source using the DbDataReader.
Create Data
The following example adds new records by executing the Insert command.
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static void InsertDataReader()
{
using (C1QuickBooksOnlineConnection conn = new C1QuickBooksOnlineConnection(connectionString))
{
conn.Open();
//Create Insert command
C1QuickBooksOnlineCommand command = new C1QuickBooksOnlineCommand(conn, $@"Insert into Attachables(Note, Category) values('{uniqueNote}', 'Document')");
Console.WriteLine("Insert operation started !!! \n \n");
//Execute Insert command
int i = command.ExecuteNonQuery();
if (i != -1)
{
Console.WriteLine("Insert operation successful !!! \n \n");
}
}
} |
Read Data
The following example retrieves data by executing the Select command.
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static void ReadDataReader()
{
//Setup Connection
using (C1QuickBooksOnlineConnection conn = new C1QuickBooksOnlineConnection(connectionString))
{
conn.Open();
//Create Read command
var cmd = conn.CreateCommand();
cmd.CommandText = "Select * FROM Attachables";
Console.WriteLine("Read operation started !!! \n \n");
//Execute Read command and display fetched data
DbDataReader rdr = cmd.ExecuteReader();
while (rdr.Read())
{
Console.WriteLine(String.Format("{0}\t{1}\t{2}", rdr["Id"], rdr["Category"], rdr["Note"]));
}
Console.WriteLine("Read operation successful !!! \n \n");
}
} |
Update Data
The following example modifies data by executing the Update command.
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static void UpdateDataReader()
{
using (C1QuickBooksOnlineConnection conn = new C1QuickBooksOnlineConnection(connectionString))
{
conn.Open();
//Create Update command
C1QuickBooksOnlineCommand command = new C1QuickBooksOnlineCommand(conn, "UPDATE Attachables SET Category = @Category WHERE Note = @Note");
command.Parameters.AddWithValue("@Category", "Other");
command.Parameters.AddWithValue("@Note", uniqueNote);
Console.WriteLine("Update operation started !!! \n \n");
//Execute Update command
int i = command.ExecuteNonQuery();
if (i != -1)
{
Console.WriteLine("Update operation successful !!! \n \n");
}
}
} |
Delete Data
The following example removes data by executing the Delete command.
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static void DeleteDataReader()
{
using (C1QuickBooksOnlineConnection conn = new C1QuickBooksOnlineConnection(connectionString))
{
conn.Open();
//Create Delete command
C1QuickBooksOnlineCommand command = new C1QuickBooksOnlineCommand(conn, "Delete From Attachables where Note = @Note");
command.Parameters.AddWithValue("@Note", uniqueNote);
Console.WriteLine("Delete operation started !!! \n \n");
//Execute Delete command
int i = command.ExecuteNonQuery();
if (i != -1)
{
Console.WriteLine("Delete operation successful !!! \n \n");
}
}
} |
Querying With DbDataAdapter
The C1QuickBooksOnlineDataAdapter class can be used to retrieve a single result set containing all the data that matches a given query. The C1QuickBooksOnlineDataAdapter uses its Fill method to fetch data from the data source. An empty DataTable instance is passed as an argument to the Fill method. Once the method returns, the DataTable instance is populated with the queried data. Since the Fill method must retrieve all the data from the data source before returning, the C1QuickBooksOnlineDataAdapter is slower compared to the DbDataReader.
The following code examples demonstrate create, read, update, and delete operations from the data source using the DbDataAdapter.
Create Data
The following example adds new records by executing the Insert command.
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static void CreateDataAdapter()
{
using (C1QuickBooksOnlineConnection conn = new C1QuickBooksOnlineConnection(connectionString))
{
//Populate DataTable
C1QuickBooksOnlineDataAdapter adapter = new C1QuickBooksOnlineDataAdapter(conn, "Select * from Attachables");
DataTable dataTable = new DataTable();
adapter.Fill(dataTable);
//Create Insert command
adapter.InsertCommand = new C1QuickBooksOnlineCommand(conn);
adapter.InsertCommand.CommandText = "Insert into Attachables(Note, Category) Values(@Note, @Category)";
adapter.InsertCommand.Parameters.Add("@Note", "Note");
adapter.InsertCommand.Parameters.Add("@Category", "Category");
adapter.InsertCommand.UpdatedRowSource = UpdateRowSource.None;
//Insert new row
DataRow customerRow = dataTable.NewRow();
customerRow["Note"] = uniqueNote;
customerRow["Category"] = "Document";
dataTable.Rows.Add(customerRow);
//Update database
var i = adapter.Update(dataTable);
if (i != -1)
{
Console.WriteLine("Insert operation successful !!! \n \n");
}
}
} |
Read Data
The following example retrieves data by executing the Select command.
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static void ReadDataAdapter()
{
using (C1QuickBooksOnlineConnection conn = new C1QuickBooksOnlineConnection(connectionString))
{
//Populate DataTable
C1QuickBooksOnlineDataAdapter adapter = new C1QuickBooksOnlineDataAdapter(conn, "Select * from Attachables");
DataTable dataTable = new DataTable();
var i = adapter.Fill(dataTable);
if (i != -1)
{
Console.WriteLine("Read operation successful !!! \n \n");
//Display fetched data
foreach (DataRow row in dataTable.Rows)
{
Console.WriteLine("{0}\t\t{1}\t\t\t{2}", row["Id"], row["Category"], row["Note"]);
}
}
}
} |
Update Data
The following example modifies data by executing the Update command.
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static void UpdateDataAdapter()
{
using (C1QuickBooksOnlineConnection conn = new C1QuickBooksOnlineConnection(connectionString))
{
//Populate DataTable
C1QuickBooksOnlineDataAdapter adapter = new C1QuickBooksOnlineDataAdapter(conn, "Select * from Attachables Where Category = 'Document'");
DataTable dataTable = new DataTable();
adapter.Fill(dataTable);
//Create Update command
adapter.UpdateCommand = new C1QuickBooksOnlineCommand(conn);
adapter.UpdateCommand.CommandText = "UPDATE Attachables SET Category = @Category WHERE Id = @Id";
adapter.UpdateCommand.Parameters.Add("@Category", "Category");
adapter.UpdateCommand.Parameters.Add("@Id", "Id");
adapter.UpdateCommand.UpdatedRowSource = UpdateRowSource.None;
//Update existing row
DataRow customerRow = dataTable.Rows[0];
customerRow["Category"] = "Signature";
customerRow["Id"] = "xxxxxxxxxxxxxxxxxxx";
//Update database
var i = adapter.Update(dataTable);
if (i != -1)
{
Console.WriteLine("Update operation successful !!! \n \n");
}
}
} |
Delete Data
The following example removes data by executing the Delete command.
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static void DeleteDataAdapter()
{
using (C1QuickBooksOnlineConnection conn = new C1QuickBooksOnlineConnection(connectionString))
{
//Populate Datatable
C1QuickBooksOnlineDataAdapter adapter = new C1QuickBooksOnlineDataAdapter(conn, $"Select * from Attachables Where Note = '{uniqueNote}'");
DataTable dataTable = new DataTable();
adapter.Fill(dataTable);
//Create Delete command
adapter.DeleteCommand = new C1QuickBooksOnlineCommand(conn);
adapter.DeleteCommand.CommandText = "Delete From Attachables Where Id = @Id";
adapter.DeleteCommand.Parameters.Add("@Id", "Id");
adapter.DeleteCommand.UpdatedRowSource = UpdateRowSource.None;
//Delete a row
DataRow customerRow = dataTable.Rows[0];
customerRow.Delete();
//Update Database
var i = adapter.Update(dataTable);
if (i != -1)
{
Console.WriteLine("Delete operation successful !!! \n \n");
}
}
} |
