I have a form which I read data to textbox from a barcode reader.
and there are some codded barcodes like this
W12346S1 is first step of a work
W12346S2 is second step of a work
W12346S3 is third step of a work
...
U123 is a user he read his code to make process
M456 is a machine user do the work on this machine.
so I want to write data to true textboxes from firs char (W, U, M) in form_KeyDown() event or one different.
(
true textboxes mean if user read a barcode which start with W key let the program write the barcode data to "work tekxtbox" or if he read abarcode which start with U program will write the barcode data to user textbox etc...
)
I wanna make this let the codes select its own textboxes. what is the way?
note: if I use textbox1.Text += e.KeyData.ToString();
the output is : ShiftKey, ShiftW, ShiftD1D2D3D4D6ShiftKey, ShiftS, ShiftD2 W12346S2
for W12346S2
Can't you just read in the text and have something like this:
string FirstChar = BarcodeString.Substring(0,1);
if (FirstChar.Equals("W"))
WorkTextBox.Text = BarcodeString;
if (FirstChar.Equals("U"))
UserTextBox.Text = BarcodeString;
Can input from your barcode reader be distinguished from typed keystrokes? If so, I would recommend that incoming barcodes not be handled by the keystroke handler, but instead use their own special handler which will wait until it has scanned an entire barcodes and then stick it in an appropriate box.
If the input from your reader looks like keystrokes, things are apt to be a little more tricky. You may want to intercept all keystrokes going to your form, look at each keystroke, determine whether it looks like it might be part of a barcode, and buffer it if so. Any time you determine that the buffered data isn't part of a barcode, either because of following characters or because a timer expires, fire your own keystroke events to re-issue the keystrokes. Ensuring that all keystrokes are handled in order may be a little tricky, but hopefully not too bad. It will probably be easier to prevent keystrokes from the barcode reader from going into an inappropriate field, than to provide a good user experience after they do.
Related
I need to automate some repetive tasks performed in an application installed in my machine. I'm coding in C# and using the library TestStack.White I can key in keyboard inputs like SHIFT or RETURN but I can´t figure out how to send a key combo. I must send SHIFT+RETURN but this keystroke is not available in TestStack.White as far as I know. How to do it? Maybe it is easier using Windows.Forms.SendKeys... Thank you in advance.
ts_ui_items.TextBox textBox = characteristics_window.Get(ts_ui_items.Finders.SearchCriteria.ByClassName("Edit"));
textBox.Text = "something";
ts.InputDevices.Keyboard.Instance.HoldKey(ts.WindowsAPI.KeyboardInput.SpecialKeys.SHIFT);
textBox.KeyIn(ts.WindowsAPI.KeyboardInput.SpecialKeys.RETURN);
ts.InputDevices.Keyboard.Instance.LeaveKey(ts.WindowsAPI.KeyboardInput.SpecialKeys.SHIFT);
textBox.Text = "nice";
This piece of code outputs a text in the application's window in its text box like:
something
nice
This is what I tried and it kind of worked but I think this is not the optimal solution....
So, basically what i'm doing is using JNA to set a LowLevelKeyboardProc Keyboard hook, everything works perfectly fine, i can get the values exactly like i want them in java, but the problem i get is when trying to convert to chars, it becomes extremely ennoying handling caps locks, SHIFT keys and tons of other things like everything thats not a-z 0-9 on the keyboard, i was wondering if there is a easier way to do the conversion?
heres the details of what I'm getting from the hook every time a key is pressed
http://msdn.microsoft.com/en-us/library/windows/desktop/ms644967(v=VS.85).aspx
, i Figured it might be best to find a way to manually generate a KeyEvent(Not char, since i need something to handle things like F keys, caps lock button, CTRL button etc etc).
Any help i can get is highly appriciated!.
The Abbot project (http://abbot.sf.net) has a system for mapping keycodes to keychars, using predefined keyboard mappings (it generates a wide variety of keystrokes and records the resulting character output). However, Java does not provide a way for "predicting" the resulting character output given a particular key code.
There may be something within the MS libraries.
I am thinking of making a few video turorials on C#, my problem is that I don't type very fast and I don't want to put the user to sleep as they watch me typing in real-time.
I would like to write a small C# program that will take a line of text and feed it to the keyboard buffer, so that I can simulate keyboard typing.
Does anyone know how to access the keboard buffer to do this?
If this has been done before or if someone knows of an existing program to do this, can you point me in the right direction.
Thanks.
You should use SendKeys, i can show you how to use
here is an example: SendKeys.Send('A');
but u can use it with your own character: SendKeys.Send(CHARACTER HERE);
what happens if we have a string variable, you will get nothing
if it happens use it this way:
string letter = "exampleletter";
foreach (char ch in letter)
SendKeys.Send(ch.ToString());
i hope it works for you
Yogibear
At PDC and other conferences I've been at, they make liberal use of code snippets to quickly drop the new code into place.
I'm not really sure that you can write to keyboardbuffer or something like this
what I know it to send to some windows some keyboard commands
in your case it will be sending keyboard commands to notepad probably
in that case use the function provided above
but I would recommend to cut video parts (typing moments) out of your video
instead of writing code in C#
You could use
SendKeys Class
Provides methods for sending keystrokes to an application.
I am writing a log of lots and lots of formatted text to a textbox in a .net windows form app.
It is slow once the data gets over a few megs. Since I am appending the string has to be reallocated every time right? I only need to set the value to the text box once, but in my code I am doing line+=data tens of thousands of times.
Is there a faster way to do this? Maybe a different control? Is there a linked list string type I can use?
StringBuilder will not help if the text box is added to incrementally, like log output for example.
But, if the above is true and if your updates are frequent enough it may behoove you to cache some number of updates and then append them in one step (rather than appending constantly). That would save you many string reallocations... and then StringBuilder would be helpful.
Notes:
Create a class-scoped StringBuilder member (_sb)
Start a timer (or use a counter)
Append text updates to _sb
When timer ticks or certain counter reached reset and append to
text box
restart process from #1
No one has mentioned virtualization yet, which is really the only way to provide predictable performance for massive volumes of data. Even using a StringBuilder and converting it to a string every half a second will be very slow once the log gets large enough.
With data virtualization, you would only hold the necessary data in memory (i.e. what the user can see, and perhaps a little more on either side) whilst the rest would be stored on disk. Old data would "roll out" of memory as new data comes in to replace it.
In order to make the TextBox appear as though it has a lot of data in it, you would tell it that it does. As the user scrolls around, you would replace the data in the buffer with the relevant data from the underlying source (using random file access). So your UI would be monitoring a file, not listening for logging events.
Of course, this is all a lot more work than simply using a StringBuilder, but I thought it worth mentioning just in case.
Build your String together with a StringBuilder, then convert it to a String using toString(), and assign this to the textbox.
I have found that setting the textbox's WordWrap property to false greatly improves performance, as long as you're ok with having to scroll to the right to see all of your text. In my case, I wanted to paste a 20-50 MB file into a MultiLine textbox to do some processing on it. That took several minutes with WordWrap on, and just several seconds with WordWrap off.
I have a combination of ItemNo and LotNo value.
Example :
ItemNo: I123
LotNo : L12345
Barcode Value is: "I123L12345"
I want to put the value of ItemNo to txtItemNo.Text and LotNo to txtLotNo.Text
How can I instruct the barcode to do Carriage Return or Enter so that I can be able to input 2 values on one Barcode scan.
My barcode supports CODE 128, CODE 3of9 and CODE 93.
Thanks in advance.
It sounds like you want to have the barcode automatically insert an EnterKey within the scanned value. Although there may be barcode scanners out there that would do this, most will not.
Instead, it's up to your code to recognize that the entered value has two values within it, and to parse them out and disseminate them to their appropriate fields.
For example, if each code starts with a letter, followed by a numeric value, then can walk through the characters, checking for alpha or numeric, and deal with them accordingly.
You can put a TAB character (0x09) between the 2 parts in your barcode and make sure that your text boxes have consecutive TabIndex and AcceptTabs set to false. So when the barcode reader puts the tab into the first text box the focus will move to the second box.
I have worked with Barcodes Readers (Datalogic and Symbol) for almost 3 years and what you are asking is a matter of Barcode Reader Configuration.
You will probably have to read codes from you configuration Chart and set after the BARCODE is read send CR as well.
provide us the Brand and Model and maybe I can help you set that up.
programatically of course that you can listen to the Text Event (on text change) and when you have the Barcode lenght just move the Focus() to other control, or add a NewLine (if it's a Multiline TextBox for example...
private void txtMyBCInput_OnTextChanged(...) {
if(txtMyBCInput.Length >= 13)
txtMyBCInput.Text += System.Environment.NewLine;
}
I tried to send them an email requesting technicall data for your issue, I got this:
Dear Bruno, According to our sales policy, we support our customer
through our local partner. Please let us know where (Company name) your
friend got our device, and I will contact the company to help your
friend. If you have any queries, please let me know.
Thank you!
Sincerely yours,
Julee Lee
Overseas Sales EMEA Division/Sales Manager
Bluebird Soft Inc.
1242 Gaepo-dong, Kangnam-gu, Seoul, Korea
Tel: 82-70-7730-8130 Mobile: 82-10-8876-6564 Fax: 82-2-548-0870
So, please fell free to contact them and ask for this feature :)
This workaround might help :
First , you have to include delimiters to your barcode.
Then use this code (This code assumes the delimiter is '$') :
private void textBox1_TextChanged(object sender, EventArgs e)
{
if (textBox1.Text.Contains("$"))
{
string[] str_split = textBox1.Text.Split("$".ToCharArray ());
textBox1.Text = str_split[0].ToString ();
textBox2.Text = str_split[1].ToString();
}
}
If you are printing the barcode yourself, you can use Code128 and include a CR, LF, and or TAB in the barcode. BTW, you should take a look at GS1-128, since you are doing something that looks like a proper application of GS1-128. Doing that would allow your business partners to use your barcodes without having to negotiate the format, as long as their software understands GS1-128.