I have a textbox, I need to check the text entered by user using textchange event to see whether it is the one I want, if it is not, I want to display to the user a notification like the one here example
I have tried the ModalPopupExtender in Ajax, and I made a panel as the PopupControlID, and I show the ModalPopupExtender only if the condition is not matched, the problem in this solution was that the popup panel is not shown under or next the textbox like the image in the example, I could not control its position to be near the textbox to tell the user this pop up message is for this textbox.
I have tried the BalloonPopupExtender too which will solve my problem regarding the place of the popup panel, but I found another problem, I could not control the show/hide of the BalloonPopupExtender, I can't show it when the condition is not met and hide it if met.
Please I need your advices..Thanks in advance
Related
I'm struggling to make a custom autocomplete style control for my application using a list view. In one form, the custom control is working as expected, however in another, when clicking on the ListView, rather than the ListViewItem being selected, the first TextBox in the form is selected instead.
Rather than clog up the question with a wall of code, here is the code for the AutoCompleteListView.
Here is an image of the form. Items are redacted due to data protection:
Also, here is a .gif showing the behaviour of the form. What I'm doing in the aformentioned gif is attempting to click on the first item within the ListView, however, as I do that, focus changes to the first text box in the form. This same behaviour occurs when clicking on any item, in any of the 3 text boxes.
I have attempted to trace the events using RuntimeFlow to watch as events fire, but it has not provided any clarity as to what is actually happening. If anyone could point me in the right direction, that'd be greatly appreciated.
My first guess is in ItemClick you are setting visibility to false, which means something else in the form needs focus, ie the textbox. So do a textbox.focus() in ItemClick to the desired textbox. And given that you will not have access to the parent form in this class, I recommend you make an OnClose event in the AutoCompleteListView and subscribe to it in the parent form, to set the focus to somewhere.
I have a webform with a textbox and 3 buttons (add, save and cancel), I'm learning how to use customvalidators (ASP.NET 4.0).
Once the page is loaded, you can only see the add button, after you click on it you can see the textbox and the other 2 buttons.
If textbox is empty I can't save the record (I get this done successfully with customvalidator and javascript, it shows me the error message "textbox can not be left empty"), but what happens if I don't want to save the record anymore and want to cancel instead (by clicking on the cancel button while textbox is still empty)?
I get the customvalidator error "textbox can not be left empty". I have to type something i it so I can do what i need.
Any suggestions?
Thanks in advance
For Cancel button set the attribute CausesValidation="false". That is it...
I have a question? How can I wire up an button in a winform to take an input from a label, and put it in a text box to display the result?
I'm confused!
I have 4 labels... I want to be able to have people put input into the labels click the update button, and then display the results in the textbox below.
Any help? Thank you!
OK so basic outline of what you need to do:
1) Go to the toolbox and put textbox(es) on the form for the user to type in.
2) Add at least one label for your output text
3) Add a Button
4) Select each item on the form, go to its properties (f4) and set the Name property for each one to something that you can remember (this is how you'll reference the controls in your code)
5) Double click on the submit button. This will open up an "Event Handler" for Button.Click, which means the code you write will run when someone clicks the button.
6) Write the C# code to do what you want. For instance, this takes the contents of a textbox (tbInput.Text) and copies it to the label text (lblOutput.Text):
lblOutput.Text = tbInput.Text;
Hope this helps...if not, read the first 3 or 4 chapters of any beginning C# book.
You don't put input input into label, you do that in a TextBox. A label is a as its name implies a "label" (fixed unmodifiable text).
Most simply, create a method to handle the Click event of the button, bind it in.
Inside this method get the text from the labels, and then update the textbox with the input.
.NET standard Labels are not the controls you are looking for. Labels are just that...text labels that do not provide for text input. What you want is a TextBox, which you will be able to find in the Visual Studio Toolbox.
If you want the look and feel of a Label, but the functionality of a TextBox, you can modify the TextBox properties accordingly (border style, background color, etc).
Drop a Button onto your form, and from the Designer if you double-click the button, a _Click event handler will be generated in your source file from which you can implement the code to do whatever it is you want to do.
I wanted to adjust the width of the Autocomplete dropdown box of a textbox. I dont want to adjust the width of that textbox, but only Autocomplete dropdown. I know that there is no way I can increase the width of the Autocomplete dropdown by using properties provided with textbox.
Hence I wanted to know whether there is any way to get the handle of that Autocomplete box and then increase the width of that drop downlist without changing the textbox width?
If this is not possible then I would like to create my custom textbox with autocomplete, in this case how to use the existing autocomplete functionality provided by microsoft? Is there any way to do it. Are there any libraries available for this?
I don't think you can use Microsoft's implementation of autocomplete, which does not have an option to adjust dropdown width.
Create a background thread to not get into the way of typing, and hook up the text change event of a combobox box or a textbox to update the candidate list (assuming autosuggest mode since you mention a dropdown). You can probably add/remove the combobox items on the fly if you have a combobox. But for dropdown list and textbox items you need a popup window
It is easy to get a popup to show, but you need to not use a fixed position so it won't go off the screen when the textbox is close to the edge of the screen. And the focus logic is a little bit complex. you need to keep focus on the textbox unless the user press the arrow keys to make a selection.
so
when focus is on textbox:
arrow keys move the focus to the popup
other keys goes to the textbox, if not handled by the dialog itself, except for the delete key when mouse is over the popup.
when focus is on popup:
arrow keys move the focus to the sibling candidate item or the textbox
other keys goes to the textbox, if not handled by the dialog itself, except for the delete key
mouse clicks:
dismiss the popup outside of the popup or the popup.
update the value of textbox if a candidate item in the popup is clicked on
It takes a lot of effort to get the focus/threading right. If you can afford some form space, you can just add a fixed width listbox to the form instead, like Visual Studio help viewer's index pane.
After going through lot of blog posts and different articles, I came to a consensus that it is next to impossible to get a solution to my problem in the way I wanted. So I've decided either to come up with a custom solution or as Sheng Jiang said I need to implement my own autocomplete object.
I've come up with a solution which fits my requirement by increasing the width of the textbox as per the largest string in the autocomplete string list while I'm adding the autocomplete custom source. As I said I cant increase the width of the text box because of the size constraint on the form, so I decided to keep this textbox in a panel and increase the size of the textbox inside that. Panel will not grow with the textbox so that solved my problem.
I know this is not perfect solution but it fits my requirement.
I have a control with several textbox controls on it.
Now, when I press tab after I edit one of the textboxes, the focus is switched to the next textbox BUT I need to press an additional tab in order for it to enter the "editing" stage.
The first tab simply draws a dotted background on the textbox ... and the second one actually puts the cursor position inside the textbox. Is there a way when I press tab, to automatically set the cursor inside the textbox?
Thanks./
Are you sure you don't have any hidden controls or other controls that might be accepting focus before your textbox? Either way, you should be able to update the tabindex value of your controls so they follow a logical sequence when tab is pressed.