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I have a Explorer.SelectionChange event.
Here is a image of outlook inbox :
https://i.stack.imgur.com/ynQXO.png
I want a previous selection of mail in Explorer.SelectionChange event.
eg :
Select 'Mail 1'
Now on selection of 'Mail 2', I want a 'Mail 1'
The Outlook object model doesn't provide anything for that out of the box. You need to get the EntryID property value of the selected item (for example, in the SelectionChange event or at any point of time by using the Selection property) and keep it until another item is selected, so you could have it when needed. But don't keep the MailItem instance in the code, that is not really a good idea. You should release underlying COM objects in the code instantly and don't hold them where possible. The original item instance can be retrieved when required by using the GetItemFromID method which returns a Microsoft Outlook item identified by the specified entry ID (if valid).
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how are you? I need to implement an autocomplete with a search on an entity to save it in a list of objects, all this with a previous confirmation message. After saving the item, I can't select the last line of the previously entered value. Any idea? I leave the step-by-step to try in TryMudBlazor.
TryMudBlazor Link
Search for "hey" and press enter
Confirm the message box
Select the string value (it is not possible to avoid the entire selection)
I need to save the last search value so I can continue searching for a similar item
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I would like to know...
why Control.Validate() exists?
in which cases it should/n't be used?
in which cases it could be handy?
I'll give you an example as the msdn does here : Control.Validate(Event).
A simple example is when you are trying to "validate" an Email address that the user enters on a TextBox. If the e-mail address is not in the standard format (containing "#" and "."), the validation fails, an ErrorProvider icon is displayed, and the event is canceled. This example requires that a TextBox and ErrorProvider control have been created on a form.
And this is the function of it :
If the CausesValidation property is set to false, the Validating and Validated events are suppressed.
If the Cancel property of the CancelEventArgs is set to true in the Validating event delegate, all events that would usually occur after the Validating event are suppressed.
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I'm trying to make like a container application where you can drag and drop files of any kind on the form and afterwards to be able to open it from there. I found some solutions where you can drag and drop files to a list view and you get it's path.. but is not how I want.. I want to have on my form in a panel or what ever is better like a shortcut of the file, an image or something to be able to see the file icon like is in explorer.
Have someone ever done something like this or point me to the right direction?
Set "Allow drop" property to "true" on your control and make use of Control.DragDrop event - it's exist on all controls, and it's invoked after drag'n'drop anything on anything(if "Allow drop" is true of course).
It this event-handler you can add new item to this or another control(ListView fits nicely to your needs), and for example to some "Dictionary" where you will store "Item and filename mapping".
Also you need to make handler for item click'ing - for ListView there a ItemActivate event. Inside this handler you can click execute default shell-action for this file by using Process.Start
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In my current project I want to implement a checkbox that, if checked, replaces all strings in labels, tabs, etc. currently being shown on a form with a different string.
For example, If checked, all instances of the word "car" would change to the word "truck" all through out the program.
I'd rather not go through a do a .replace on every single string in the code. I was wondering if there was some way to "intercept" output strings and replace them on the fly; something like making a string-listener. Any help would be appreciated!
I am no GUI/WinForms program but this would be my personal approach. Add all of these UI elements to a List<T> in the forms constructor. Then in the "replace box checked event handler" you can just iterate over the list applying the same change to all the items. It's by no means a perfect solution but it does mean you only have to statically reference each of the items once. After they're in the list you can operate on all of them very easily.
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I've just got a stupid question. I have done research but I quite don't understand the explanations given as I'm a beginner in C#.
I have a class called things. The user now ca create a new object in this class by clicking a button. He can give some propertes for the object before, e.g. a description or a name.
This new object has to be created automatically then.
I want a list where all the object names are listed and when the user clicks on one of these, a label should show other properties of the object apart from the name, e.g. the description.
How shall I name these objects the user creates? And how can I make the label show the properties when the user just clicks on the list.
The program has no use really but I want to create it in order to learn how object orientation works.
I hope you understand my question.
Thanks in advance to everybody
Here is my assumption,
You have a Class named "SomeClass", When you click "New" Button, the new object should be created and it should be added to the list.
You can have a List<SomeClass> list = new List<SomeClass>() Which will act as a main list, and you can just use the single object as follows,
ON NEW OBJECT CLICK
SomeClass cls = new SomeClass();
cls.Description ="desc";
list.Add(cls)
Hope this is what you are expecting.