To modify existing records, use UPDATE statements.

Update Syntax

The UPDATE statement takes as input a comma-separated list of columns and new column values as name-value pairs in the SET clause, as shown in the following example:

UPDATE <table_name> SET <select_statement> | {<column_reference> = <expression> [ , ... ]} WHERE { Id = <expression>  } [ { AND | OR } ... ] 

<expression> ::=
  | @ <parameter> 
  | ?
  | <literal>

You can use the ExecuteNonQuery method to execute data manipulation commands and retrieve the rows affected, as shown in the following example:

C#

String connectionString = " If using an online instance: InitiateOAuth=GETANDREFRESH;OAuthClientId=YourClientId;OAuthClientSecret=YourClientSecret;CompanyFileId=yourCompanyFileId;CallbackURL=http://localhost:33333;User=companyFileUser;Password=companyFilePassword; If using an on premise instance: InitiateOAuth=OFF;URL=http://localhost:8080/accountright;CompanyFileId=327eed10-9615-4e5e-bd9e-ae2cc00e2c70;User=companyFileUser;Password=companyFilePassword;";
using (MYOBConnection connection = new MYOBConnection(connectionString)) {
  int rowsAffected;
  MYOBCommand cmd = new MYOBCommand("UPDATE Accounts SET Name='John' WHERE Id = @myId", connection);
  cmd.Parameters.Add(new MYOBParameter("myId","6186169c-6540-4d72-8bfe-ecc706e500ee"));
  rowsAffected = cmd.ExecuteNonQuery();
}

VB.NET

Dim connectionString As [String] = " If using an online instance: InitiateOAuth=GETANDREFRESH;OAuthClientId=YourClientId;OAuthClientSecret=YourClientSecret;CompanyFileId=yourCompanyFileId;CallbackURL=http://localhost:33333;User=companyFileUser;Password=companyFilePassword; If using an on premise instance: InitiateOAuth=OFF;URL=http://localhost:8080/accountright;CompanyFileId=327eed10-9615-4e5e-bd9e-ae2cc00e2c70;User=companyFileUser;Password=companyFilePassword;"
Using connection As New MYOBConnection(connectionString)
  Dim rowsAffected As Integer
  Dim cmd As New MYOBCommand("UPDATE Accounts SET Name='John' WHERE Id = @myId", connection)
  cmd.Parameters.Add(New MYOBParameter("myId", "6186169c-6540-4d72-8bfe-ecc706e500ee"))
  rowsAffected = cmd.ExecuteNonQuery()
End Using