I defined a form object with databinding: frmDisplay. When the dataset of
that form has displayed its content 5 times, I need to instantiate a new copy
of the form and display that content. Here is what I have:
private void timer1_Tick(object sender, EventArgs e)
{
if(this.msgCount==5)
{
//suspend layout updates and play critical messages
//the next one throws an unknown object error when closing
Application.Run(new DisplayInfoScreen.frmDisplay("Critical"));
msgCount = 0;
}
else
{
//check for position at end of loop
if(this.BindingContext[objdsActive,"Message"].Position ==
(this.BindingContext[objdsActive,"Message"].Count - 1))
{
//reset loop to start of messages if at the end
this.BindingContext[objdsActive,"Message"].Position = 0;
msgCount += 1;
}
else
{
//advance step through to next message
this.BindingContext[objdsActive,"Message"].Position += 1;
msgCount += 1;
}
this.objdsActive_PositionChanged();
}
}
The timer objects work as Timer1 or Timer2 depending on how the form was
started (plain or critical message) and it does play, but when the critical
messages are done, the form cannot close and dispose. I'm adding more debugs
into it now, but the error just says "no object". I'm thinking it's because
the form doesn't return control or resume in the original form.
The other way I can think to do it is as a new form or clearing the current
ds and merge the new and bring back the old. Seems overly complicated and
processor intensive.
Maybe remove the object definition from the main thread of the application
so it's basically timers and SELECT statements being passed to a form object?
The form takes nothing or a string arguments to initialize:
static void Main(string[] args)
{
if(args.Length == 0) {
//run standard display
Application.Run(new DisplayInfoScreen.frmDisplay());
}
else
{ //run critical information display
Application.Run(new DisplayInfoScreen.frmDisplay("Critical"));
}
}
I've not done this in C# before. I appreciate some direction. I'm sure it's
a fundamental design issue.
Thanks,
E.
