richtexbox Text_Changed

ClonecMr cool

Hello Everyone..
I'm Newbie in C# language..

I have problem with my program,
I create a program that can print a content of richtextbos

--snip--

private void rtb_TextChanged(object sender, EventArgs e)
        {
               printbtn.PerformClick();

        }

---end snip--

I mean the program will do action, if content in richtexbox has been change to different content (word).
but it not work, the printbutton do action if i change with the same content.

what must i do ?

Thanks

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

ClonecMr cool15y ago
Thanks for the reply, brother...

I try your code, but it not work..

Before it,
My RTB is set to readonly mode and shown my query result by npgsqlreader,
i use timer to make dynamic RTB and show the content auto update.
so, the program printing continuously if text assign is exactly the same as what it was before!

but I've found another way for my program..

once again thank you very much for replies ^_^
Vulpes15y ago
Well, the RTB's TextChanged event will fire whenever your program assigns something to its Text property even if what you assign is exactly the same as what it was before!

I assume you've made it readonly so the user can't enter anything manually.

The only thing you can do to prevent it from printing the contents of the RTB when the text hasn't actually changed, is to store the last text value in a field and then check the current text value against the field value:

private string rtbText = "";

private void rtb_TextChanged(object sender, EventArgs e)
{
if (rtb.Text != rtbText)
{
rtbText = rtbText;
printbtn.PerformClick();
}
}