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    <p>It is better to use without timer. The below code sample is with background thread</p> <p>Here is the code snippet</p> <pre><code>privateThread DBMSAlertThread; private void DBMSAlert(bool Register) { try { string sSql; if (Register) sSql = "call dbms_alert.register('XYZ')"; else sSql = "call dbms_alert.remove('XYZ')"; dbmsAlert = new OracleCommand(); dbmsAlert.CommandText = sSql; dbmsAlert.ExecuteNonQuery(); if (Register) //start the background thread { DBMSAlertThread = new Thread(AlertEvent); DBMSAlertThread.IsBackground = true; DBMSAlertThread.Start(); } } catch (Exception LclExp) { //Show error or capture in eventlog } } private void AlertEvent(object sender) { while (true) { string Message = ""; int Status = -1; bool bStatus; OracleParameter param; try { OracleCommand dbmsAlert = new OracleCommand(); dbmsAlertScan.SQL.Add("call dbms_alert.WaitOne('XYZ', :Message, :Status, 0)"); //Last parameter indicate wait time param = new OracleParameter("Message", OracleDbType.Varchar2, ParameterDirection.Output); dbmsAlert.Parameters.Add(param); param = new OracleParameter("Status", OracleDbType.Varchar2, ParameterDirection.Output); dbmsAlert.Parameters.Add(param); OracleParameter.ExceuteNonQuery(); Message = dbmsAlert.Parameters["Message"].Value.ToString(); bStatus = int.TryParse(dbmsAlert.Parameters["Status"].Value.ToString(), out Status); if (Status == 0) //0 = Alert Received, 1 = Timed out { //notify or do ur stuff } } catch (Exception Exp) { //raise an error } } } </code></pre>
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    1. POIs there a way to use DBMS_Alert to notify a Winform application of a database change
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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