I´m trying to set textbox visible = false to avoid user from write on it manually but I still need it to write on it by using a bar code scanner, so I need it to get focused before use the scanner, what would be the better way to do it?
Your best option would be to simply validate that what's entered into the textbox is indeed a bar code. What happens when the scanner breaks down and the user still needs to enter a bar code? Limit it to numbers only.
If that's not an option and you find the scanner doesn't work with hidden or disabled textboxes, then set TabStop = false and Multiline = true, and try setting the text box size to 0x0. Or at least really tiny and make it the same colour as the background. In that case you'd want a label or something to then display the bar code or product info so the user knows the scanning worked.
Another possibility may be to set KeyPreview = true on your form. Then you can handle anything that looks like a bar code in the form's KeyPress event, no matter which control is focused. If numbers start coming in, capture them, and if it turns out not to be a bar code, just forward them to the focused control.
just simply set textbox property size to (0,0) with textbox visible = true
From the question, you want to achieve two things.
Make the textbox invisible before Scanning.
Lock the user from editing the textbox after bar code scanning.
Solution
Set the textbox visibility property to false before Scanning so that it does appear on the screen whatsoever.
Have an event handler after finishing scanning or at the end of your scanning method/function, change the Property of the textbox called Disabled to true.
Hope this helps.
If the purpose of hiding textbox is to not-allow user from editing it, then
you may set the ReadOnly property of texbox to true, then call the .Focus() method
before scanning the barcode. In my experience, after having installed the barcode
reader driver, softwares from accompanying CD, all you have to do is scan the
barcode and it will populate with the barcode-value in human readable format,
on any control in an application that can take user-input. I suggest to use
Readonly property of textbox instead of setting visible = false.
Related
Is it possible to make a ListBox ReadOnly? - Technically yes. Set the "Enabled" property to False.
Selection: None break my program because it's trying to select them from the program, but if a user selects one, I don't want it to change, or highlight. I want all highlighting done by the program, is this possible?
This picture shows what I have on my Form
My problem is, it works perfectly fine, I just want it nicer, by only allowing the user to click on only one of the selections from the red box, while they cannot select one from the blue boxes, but the computer can.
My assumption is that you are using WinForms, not WPF. So a simple way is to add a bool flag for each list control to your form. Then on the Selection changed event prevent the change from occurring unless you've set the bool to true. That will allow you turn on/off selected item changes.
Actually here is a link here, instead of bool just create an int to store the current index for each list box. Upon the Selection changing simply set the SelectedItemIndex to the int variable.
Cancelling ListBox SelectedIndexChange Event
Im trying to create a basic example sign up page.
I want the mouse pointer to enter the textbox only on click however it seems to enter the first textbox by default. What is the process to change this?
You could use the opacity and sets it to 0 together with the IsEnabled attribute which I would set to false.
Then you put in your click event this simple code.
textbox.Opacity="1";
textbox.IsEnabled="true";
I hope this helps you.
I have a DataGridView with a binding source to an interface that has a bool. When I click the checkbox that is created in the grid, nothing happens. The value is not set and the box does not get checked.
However, and this gets very case specific, if I set a binding source to a completely different control in the same view then the checkbox in the first control is possible to click. The downside to this is that every DataGridView when loaded has a large portion of it that is completely black.
sorry I have no point to make this as a comment.
anyway did you check that the column of the DataGridView is set as readOnly = false, or enable = true.
check it also in run time, make a break point before and after doing the binding and see how your grid is set up.
Also if you can give some code maybe will see some other issue that can make this happen.
good luck
I have an application where I have several forms. Its a C# windows-form based application build in .NET 4.O. I have several forms where the user enters the data. There are grids where data is displayed and whole lots of controls on the form. Believe me! its a mess of so many controls. I have to setup the TabIndex for each control. I have literally disabled the TabStop property of certain controls I don't want to be tabed into it. However, still once I go through the order I want, I TAB it, and it works but once it reaches the last box then it takes 3-4 times more tabbing to get to the first field. I tried disabling the TabStop property for the controls I don't want. But I think there might be certain controls that I don't see but they might be included in the Tab property.
My question is that is there any way that I can set the TabStop property of all the controls on the winform to false and then set it to true for the controls I want to include only.
I also open to if there is any other way I can implement this?
If further explanation is needed, let me know!
I have attached a picture thats the order I want and then loop back but somehow its not working. Just in addition there is also two panels in the form and I have disabled their TabStop property to False.
Go to View menu and click Tab Order. This will activate the tab-order selection mode on the form. TabIndex value will be displayed as a number on each control.
Click on controls in order you need them to be tabbed. This will set appropriate values for TabIndex of controls.
After you finished, go to View menu and turn-off Tab Order.
Select controls you don't want to be tabbed and set TabStop = false.
One simple explanation is that you lost a control underneath another one that overlaps it. Or it is located beyond the edges of the Form. A good tool to find it back is View + Other Windows + Document Outline.
If that doesn't help then diagnose it by adding a Label and a Timer. Write the Tick event handler like this:
private void timer1_Tick(object sender, EventArgs e) {
if (this.ActiveControl != null) label1.Text = this.ActiveControl.Name;
}
You should try the following code:
foreach (Control ctrl in this.Controls)
ctrl.TabStop = false;
Also you can try to check the last tabindex. Then go to your form.designers.cs and find all controls with a greater tabindex and then remove them : add
ctrlTabStop = false;
I did not test any of this, so be careful : backup your *.designer.cs before.
Greetings,
I have a form where employees enter comments in a multiline textbox with a limit of 4000 characters. I have the rows set to 8 (obviously an arbitrary number).
When a supervisor looks at the comments the textbox is disabled so the employee comments cannot be modified.
The problem is when the data extends below row 8. Since the textbox is disabled the scrollbar cannot be moved and the supervisor cannot see all the comments. If I hide the textbox and databind to a label for the supervisor none of the line breaks are maintained and a well written paragraph turns into the biggest run on sentence ever…
Is there a way to enable the scroll bar leaving the text disabled?
Is there a way to preserve the structure of the entry in the label?
Instead of disabling the textbox you should set the ReadOnly property to True. This keeps the scrollbars functional but doesn't allow modification of the textbox.
txtComments.ReadOnly = true;
In supervisor mode, don't put the text into a textbox, put it in a label as you mentioned, with '.Replace("\n", "<br>")' in your code.
Alternatively, show the textbox without disabling it, and just disable the 'save' button. Put a note on the page saying that, "changes made here are not persistent" or something to that effect.
Make the text box read only, and set the fore color to the same shade of grey used in disabled text boxes.
<asp:TextBox ForeColor="#AFAFAF" ReadOnly="true" />
Put the text in a PRE tag, and apply overflow:scroll to it.
Make sure to escape the text using Server.HtmlEncode first.