Error Event (DbScript)

In This Topic

Syntax

Occurs when a SQL statement within script has produced an error.

Syntax

Visual Basic
C#

public event ScriptErrorEventHandler Error

'Declaration
 
Public Event Error As ScriptErrorEventHandler

Event Data

The event handler receives an argument of type ScriptErrorEventArgs containing data related to this event. The following ScriptErrorEventArgs properties provide information specific to this event.

Property	Description
Exception	Gets the System.Exception instance that DbScript throws.
Ignore	Gets or sets whether the current error will be ignored or not.
Length	Gets length of statement where an error occurred.
LineNumber	Gets number of the line where an error occurred.
LinePosition	Gets position in the line where an error occurred.
Offset	Gets offset of statement where an error occurred.
StatementType	Gets type of the statement that caused an error.
Text	Gets SQL statement where an error occurred.

Remarks

This event can be generated by Execute and ExecuteNext methods when an error happens.

By default, Execute method stops and returns immediately after event handler finishes. If you want to ignore the error and continue execution of the script, set ScriptErrorEventArgs.Ignore property to true.

Example

This sample demonstrates how to execute script and retrieve information about execution flow using Progress and Error events.

csharp

[STAThread]
static void Main(string[] args)
{
string script =

  "INSERT INTO DEPT VALUES (10,'ACCOUNTING','NEW YORK');"+
  "INSERT INTO DEPT VALUES (20,'RESEARCH','DALLAS');"+
  "INSERT INTO DEPT VALUES (30,'SALES','CHICAGO');"+
  "INSERT INTO DEPT VALUES (40,'OPERATIONS','BOSTON');"+
  "SELECT * FROM DEPT";
      SQLiteConnection sqConn = new SQLiteConnection(
          "DataSource=mydatabase.db;");
      SQLiteScript sqScript = new SQLiteScript(script,sqConn);
      sqScript.Progress += new Devart.Common.ScriptProgressEventHandler(OnProgress);
      sqScript.Error += new Devart.Common.ScriptErrorEventHandler(OnError);
      sqConn.Open();
      sqScript.Execute();
      sqConn.Close();
    }

static void OnProgress(object sender, Devart.Common.ScriptProgressEventArgs e)
{
  Console.WriteLine(e.Text);
  Console.WriteLine("  Successfully executed.");
}

static void OnError(object sender, Devart.Common.ScriptErrorEventArgs e)
{
  e.Ignore = true;
  Console.WriteLine(e.Text);
  Console.WriteLine("  Failed.");
}

Visual Basic

Module Module1

  Friend WithEvents sqScript As Devart.Data.SQLite.SQLiteScript

  Sub Main()
    Dim script As String = _

  "INSERT INTO DEPT VALUES (10,'ACCOUNTING','NEW YORK');" + _
  "INSERT INTO DEPT VALUES (20,'RESEARCH','DALLAS');" + _
  "INSERT INTO DEPT VALUES (30,'SALES','CHICAGO');" + _
  "INSERT INTO DEPT VALUES (40,'OPERATIONS','BOSTON');" + _
  "SELECT * FROM DEPT"
    Dim sqConn As SQLiteConnection = New SQLiteConnection( _
        "DataSource=mydatabase.db;")
    sqScript = New SQLiteScript(script, sqConn)
    sqConn.Open()
    sqScript.Execute()
    sqConn.Close()
    Console.ReadLine()
  End Sub

  Sub OnProgress(ByVal sender As Object, ByVal e As Devart.Common.ScriptProgressEventArgs) Handles sqScript.Progress
    Console.WriteLine(e.Text)
    Console.WriteLine("  Successfully executed.")
  End Sub

  Sub OnError(ByVal sender As Object, ByVal e As Devart.Common.ScriptErrorEventArgs) Handles sqScript.Error
    e.Ignore = True
    Console.WriteLine(e.Text)
    Console.WriteLine("  Failed.")
  End Sub

End Module

Reference

DbScript Class
DbScript Members
Progress Event
Execute Method
ExecuteNext Method

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