How can I handle ArcMap events of CREATE, UPDATE or DELETE?

Question

As a developer I can use ArcPy (Python) or ArcObjects (.NET) to develop some extensions or tools for ArcGIS platform. But I need to handle some events. When a user connected to an Enterprise geodatabase and create an object in database table, can I handle the events of CREATE, UPDATE or DELETE? Is this possible?

Answer 1

This is from working code, in this example 'timer save' a window pops up when a time has elapsed reminding the user to save, so I only use OnStartEditing and OnStopEditing events; It is important to note that this occurs in the form load event as there is an attached form:

private void TimerSaveForm_Load(object sender, EventArgs e)
{
    vSaveEditsWarn = DateTime.Now;
    this.FormClosing += new FormClosingEventHandler(TimerSaveForm_FormClosing); // to cleanup events
    IEditor pED = pApplication.FindExtensionByName("ESRI Object Editor") as IEditor;

    ((IEditEvents_Event)pED).OnStartEditing += new IEditEvents_OnStartEditingEventHandler(TimerSaveForm_OnStartEditing);
    ((IEditEvents_Event)pED).OnStopEditing += new IEditEvents_OnStopEditingEventHandler(TimerSaveForm_OnStopEditing);
    TimerSaveForm.CheckForIllegalCrossThreadCalls = false;
    this.TopMost = true; // ensure this form isn't lost under another window'
}

void TimerSaveForm_OnStopEditing(bool save)
{
    vTimer.Stop(); // System.Timers.Timer object
    StartStopButton.Text = "Start";
    this.BackColor = System.Drawing.SystemColors.Control;
    this.Text = "Auto SaveEdits";
}

void TimerSaveForm_OnStartEditing()
{
    vTimer.Start(); // System.Timers.Timer object
    StartStopButton.Text = "Stop";
    this.BackColor = System.Drawing.SystemColors.Control;
}

If you're writing a tool without a form you can wire it from the tool directly in the initializer. From the sounds of it you want to capture the On Start/Stop to grab your edit workspace then potentially OnCreateFeature, OnChangeFeature and OnDeleteFeature, which are wired in the same manner as the code shown.

When you start typing the event intelisense should finish the rest for you and offer to create the function wired to the event, I advise you to say yes and yes, not because I'm lazy but it saves mistyping and ensures that the event is correctly associated with the function.. if you try to create the function first Visual Studio may not recognize the association which will lead to hours of frustration trying to work out why an event isn't firing even though everything is spelled correctly.

Unwiring the events is a little counter intuitive, it's almost identical to the wiring but use -= instead of +=:

((IEditEvents_Event)pED).OnStartEditing -= new IEditEvents_OnStartEditingEventHandler(TimerSaveForm_OnStartEditing);