Uh, aren't 99% of these lines going to be off screen anyway? Why not have the textbox with two scroll buttons? Probably are several ways to do that, maybe textbox1.txt = code.substring(i,j) or an array of strings (lines).
On Nov 10, 7:45 am, Michael Busch <michael.n.bu...@googlemail.com> wrote: > Hi Guys. > > I have a problem, hopefully you can help me. > > I am working with automation software and on my HMI software I have a small > performance problem. > Sometimes it is possible to show the code of a control program, what it > (sometimes) about 145,000 lines (or more). > > It comes out of the control as one string. > > I tried to show the code in a textbox, but this takes about one minute to > show up. My HMI is frozen during the time. > Yes, I am using a background worker (async), so I dont understand why it > freezes up the whole HMI. > (its only the line filling the multiline textbox). > The code in this case is only one line: > > >> textbox1.text = codefromControl.code; > > So, I changes to code to a stringbuilder, which is filling the textbox. > I splited the text up in lines, and tried different ways to fill up the > textbox (trying as less refreshes of the textbox as possible). > > The best performance I got was 10,000 lines in 0.7 sec. > But this means its still 15sec to load the screen (its frozen in all > scenarios with my background worker, and I dont know why). > > So, I need to know > > - how can add my controlcode to the textbox with the best performance? > - some ideas ( I know I dont posted code) why writing to the textbox freezes > my HMI and why my background worker isnt working? > - some ideas to increase performace? perhaps different control - listview, > richtextbox, etc? > - How can I realize that the screen is loaded, the first e.g. 1000 lines are > displayed and the rest is loaded in the background ( I tried this out for a > couple os days, but I got it never running (see the other problems, its > always freezing up). > > Thanks a lot th everybody in advance. > > Mike
