I all of a sudden can get my ContextMenuStrip to work on the form window itself. If i right click on my label or on my notify icon it works but nothing happens on the form itself. I'm certain it worked before I renamed the form but I can't seem to find out where the problem could stem from.
The ContextMenuStrip is correctly and identically set on both the form as well as the label and notify icon.
Anybody know where there problem could be? If my code is needed I will add it.
Check forms ContextMenuStrip property is properly set.
Related
I'm trying to get a resize event working, and I tried just adding "this.Reszie += whatever" and that worked fine, but whenever I make other changes to the Form through the editor, it completely erases that line (as well as anything else in the Form1.Designer.cs class). My questions is, how can I edit this as intentioned, like how double clicking on a button or text box will automatically do this all? Thanks
You can select event handlers in the properties window. You must click on the flash symbol, to switch form properties to events view.
Also, before you do manual changes to ".designer.cs", close the form designer (because saving the form overwrites the ".designer.cs" file).
Usually, you should avoid doing changes in the ".designer.cs" file, but there are rare occasions where this is helpful. E.g., you have used a TextBox and want to replace it by a custom textbox or third-party textbox. Then changing the type manually will allow you to do it without removing and re-adding these controls.
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'm using WPF ComboBox. When popup is opened and user clicks somewhere outside, popup closes. But I would like to leave popup opened and bypass standard behavior of the ComboBox in this case. I found here a solution. It is suitable for bypass the standard behavior of ComboBox, but the popup still closes. If I trying to set in this time ComboBox.IsDropDownOpen=true, my application crashes with error "Cannot reopen a popup in the closed event handler".
Have you any ideas how to solve this problem? Thanks!
I don't think that it is possible to set this behaviour to ComboBox. You can try to do that with ListBox though: just set ListBox.Height = 20 and expand it on ListBox.SelectionChanged().
And if for some reason you need ListBox to look exactly like ComboBox - you could use control templates.
Context :
I created an User Control. For some reason, I want to use this control in different size. To keep the initial "Template" of my User Control when re-sizing, I use the property Anchor on my different element inside the control.
So when I create my control at design time, it is possible to me to hand re-size the control and keep the original "Template" of it.
When the control is created, it look like this :
And after re-size :
As you can see, the property Anchor work well.
The label and the picture stay in the middle.
The "?" stay to the left corner.
The problem :
The problem I have is, when the control is reloaded, created with a different size as the initial one, all the elements inside return to their initial position :
I don't know if this is the better way to do what I try to achieve. Keep in mind that I add and re-sizing the control's during the design time.
Thank you.
EDIT :
I think my problem is caused by the designer. Ex : I add my control in the designer, I re-size it, I run the solution. All is working good. But when I go to the code of the page, and then, return to the designer, the element inside the control returned to their initial position.
EDIT 2 :
Ok I have found a solution, I simply moved all the element of the User control inside a Panel. For some reason that I can't explain, it work perfectly. The control's stay at the same location.
The solution is ta add a Panel to the User Control and dock it to "Fill", then place the element inside of this panel. For some reason that I can't explain, the designer keep the location of the re-sized control's elements.
The anchoring, docking and auto-sizing of a UserControl seem to be terribly confusing. I found UserControl does not auto resize with the Form which suggests that you set the AutoSize property to False, which I did, and it still didn't correct my problem. But when I tried your solution, I also noticed there are two copies of the AutoSize property! I had set the AutoSize in the UserControl designer to False, but the Form designer where the UserControl instance was added also had an AutoSize on the instance, and that one had a different value (it was still True). When I set that to False also, then everything worked (with the panel in place). Then I removed the panel you suggested, and everything still worked. So I guess the trick is to make sure you check all the properties of the UserControl in the UserControl designer and in the form designer where the control is used. Then you shouldn't need a panel.
I've had similar problem in VS2015 project, and unfortunately - none of your answers helped. Clean and working solution was found here, in Jignesh Thakker answer.
For quicker navigation here it is how it was done in my project (c++/cli, not c#, but idea is the same):
System::Void Form1_Load(System::Object^ sender, System::EventArgs^ e) {
/* some code */
myUserControl = gcnew MyUserControl();
myUserControl->Dock = DockStyle::Fill;
tabPage1->Dock = DockStyle::Fill;
tabPage1->Controls->Add(myUserControl);
/* some code */
}
Set the Localizable property of the parent form at VS designer to false. This solves the problem at design time. (Save, close and reopen the form after switching the property)
If you need a localized application switch the Localizable property to true after finish up working at the layout and don't care about the wired representation in the VS designer. At run time it's shown correctly.
Tested in VS2013
I'm building a C# WinForms program, and my textboxes do not allow the user to highlight the text consistently throughout the program.
In some places, the highlighting works normally: you type something in the box, click and drag over some text, and it highlights where you dragged.
In other places, clicking and dragging does not select the text. The only way to do it is by double clicking on the text.
I haven't changed any default properties of these textboxes or messed with any event listeners. I placed brand new textboxes in different places, and they behave differently.
I'm wondering if it has something to do with the properties of the Form the TextBox is contained in, since it seems to appear that either all textboxes in a particular form work, or none do. However, as far as I can tell the properties look to be the same across the board, and I don't ever remember changing anything.
To me it seems like it's happening randomly. I can't find any information on the topic. Does anybody have any idea what I'm talking about?
EDIT: Ok, I figured out where the problem lies, but I still don't know how to fix it.
It happens only in forms which have been added to a SplitContainer in my main window like so:
myForm.TopLevel = false;
this.splitContainer.Panel2.Controls.Add(myForm);
myForm.Show();
EDIT 2: I now know that this is the same issue encountered here: Windows Forms: Unable to Click to Focus a MaskedTextBox in a Non TopLevel Form . The accepted answer isn't useful to me, and the other answers seem impractical, since I'd have to add event handlers to every single textbox...
I had the same problem today. I tried changing TopLevel as others have suggested. This didn't work. Somewhere along my search I saw a suggestion to create a click event for the text box and use it to force focus on the control. This made no difference either. There were no events that should intercept and block a click event. It was just an MDI child with a few controls on it stuffed inside a panel on a split container. I couldn't highlight text in textboxes or textbox-derived controls though.
Turns out the solution was to switch the order of childform.Show() and panel.Controls.Add(childform). If you add the child form before it is shown, you apparently cause this bug.
I'm a little perplexed at what you're trying to accomplish. I'm used to using a user control if I want to embed something on a SplitPanel, and using an MDI form if I want child forms.
Do either of these approaches work for you, and if not, can you explain why not/what you are trying to accomplish?
Thanks!
James
* Edit *
You can add a panel (regular panel, not a split panel) to an MDI parent form and dock it to the left. Add whatever you currently have in the left panel of the SplitContainer to this left-docked panel, instead. Now you can instantiate forms, set them as children to the main MDI parent, and have all the window functionality you're looking for... You can maximize them, and they will fill the right-side of the MDI parent; you can pick cascade or tile from the window menu, etc.
If you want to let the user dynamically resize the left panel, drop a splitter panel into the right-hand portion of the main MDI form container; it will dock left by default, and show up to the immediate right of the panel. Now when you run, you can drag the border of the panel to resize.
Remember, an MDI form is like any other form... you can add any control you want to its surface, and .NET is pretty smart about how it incorporates the child windows.
If you're still not sure of what I'm trying to describe, I'll try to find somewhere I can drop a sample project... because everything is really done in the designer, there's not really any code I can show you. Here's the code for creating a form as an MDI child (running from within the MDI parent):
MyForm frm = new MyForm();
frm.MdiParent = this;
frm.Show();
That's all there is to it.
HTH!
James