C# winforms, How can I make a Combobox open upwards / Is there one that does?
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box;
}
In C#, a winforms application,
How can I make a Combobox that opens upwards / Is there one that opens upwards?
I see some questions like this but they refer to a WPF application rather than a winforms one. I'm asking about a winforms application.
c# winforms
asked Jun 4 '17 at 11:49
barlopbarlop
4,64354568
|
show 10 more comments
In C#, a winforms application,
How can I make a Combobox that opens upwards / Is there one that opens upwards?
I see some questions like this but they refer to a WPF application rather than a winforms one. I'm asking about a winforms application.
c# winforms
asked Jun 4 '17 at 11:49
barlopbarlop
4,64354568
Not possible unless you write a control of your own.
– Koby Douek
Jun 4 '17 at 11:53
4
Drag the form to the bottom of your screen, then open the combo box. Like magic, it opens upwards!
– Cody Gray♦
Jun 4 '17 at 11:54
@KobyDouek perhaps one has been written that I can use?
– barlop
Jun 4 '17 at 11:54
It's possible to achieve this effect by subclassing the control and manipulating its behavior using Windows API functions. (Start with code like this.) But the problem with this is that the OS uses slide effects, and there's no way to change the direction of these, so it'll appear to slide down and then the drop down list will appear above it. Ugly. Perhaps you can explain why you need to worry about this, instead of letting the window manager handle it automatically? Your design should not rely on the combo box dropping in any particular direction.
– Cody Gray♦
Jun 4 '17 at 11:57
1
Well, no, because there's plenty of room to display it on top of your oversized taskbar.
– Cody Gray♦
Jun 4 '17 at 11:59
|
show 10 more comments
In C#, a winforms application,
How can I make a Combobox that opens upwards / Is there one that opens upwards?
I see some questions like this but they refer to a WPF application rather than a winforms one. I'm asking about a winforms application.
c# winforms
asked Jun 4 '17 at 11:49
barlopbarlop
4,64354568
In C#, a winforms application,
How can I make a Combobox that opens upwards / Is there one that opens upwards?
I see some questions like this but they refer to a WPF application rather than a winforms one. I'm asking about a winforms application.
c# winforms
c# winforms
asked Jun 4 '17 at 11:49
barlopbarlop
4,64354568
asked Jun 4 '17 at 11:49
barlopbarlop
4,64354568
asked Jun 4 '17 at 11:49
barlopbarlop
4,64354568
asked Jun 4 '17 at 11:49
barlopbarlop
4,64354568
asked Jun 4 '17 at 11:49
barlopbarlop
4,64354568
4,64354568
Not possible unless you write a control of your own.
– Koby Douek
Jun 4 '17 at 11:53
4
Drag the form to the bottom of your screen, then open the combo box. Like magic, it opens upwards!
– Cody Gray♦
Jun 4 '17 at 11:54
@KobyDouek perhaps one has been written that I can use?
– barlop
Jun 4 '17 at 11:54
It's possible to achieve this effect by subclassing the control and manipulating its behavior using Windows API functions. (Start with code like this.) But the problem with this is that the OS uses slide effects, and there's no way to change the direction of these, so it'll appear to slide down and then the drop down list will appear above it. Ugly. Perhaps you can explain why you need to worry about this, instead of letting the window manager handle it automatically? Your design should not rely on the combo box dropping in any particular direction.
– Cody Gray♦
Jun 4 '17 at 11:57
1
Well, no, because there's plenty of room to display it on top of your oversized taskbar.
– Cody Gray♦
Jun 4 '17 at 11:59
|
show 10 more comments
Not possible unless you write a control of your own.
– Koby Douek
Jun 4 '17 at 11:53
4
Drag the form to the bottom of your screen, then open the combo box. Like magic, it opens upwards!
– Cody Gray♦
Jun 4 '17 at 11:54
@KobyDouek perhaps one has been written that I can use?
– barlop
Jun 4 '17 at 11:54
It's possible to achieve this effect by subclassing the control and manipulating its behavior using Windows API functions. (Start with code like this.) But the problem with this is that the OS uses slide effects, and there's no way to change the direction of these, so it'll appear to slide down and then the drop down list will appear above it. Ugly. Perhaps you can explain why you need to worry about this, instead of letting the window manager handle it automatically? Your design should not rely on the combo box dropping in any particular direction.
– Cody Gray♦
Jun 4 '17 at 11:57
1
Well, no, because there's plenty of room to display it on top of your oversized taskbar.
– Cody Gray♦
Jun 4 '17 at 11:59
Not possible unless you write a control of your own.
– Koby Douek
Jun 4 '17 at 11:53
Not possible unless you write a control of your own.
– Koby Douek
Jun 4 '17 at 11:53
4
4
Drag the form to the bottom of your screen, then open the combo box. Like magic, it opens upwards!
– Cody Gray♦
Jun 4 '17 at 11:54
Drag the form to the bottom of your screen, then open the combo box. Like magic, it opens upwards!
– Cody Gray♦
Jun 4 '17 at 11:54
@KobyDouek perhaps one has been written that I can use?
– barlop
Jun 4 '17 at 11:54
@KobyDouek perhaps one has been written that I can use?
– barlop
Jun 4 '17 at 11:54
It's possible to achieve this effect by subclassing the control and manipulating its behavior using Windows API functions. (Start with code like this.) But the problem with this is that the OS uses slide effects, and there's no way to change the direction of these, so it'll appear to slide down and then the drop down list will appear above it. Ugly. Perhaps you can explain why you need to worry about this, instead of letting the window manager handle it automatically? Your design should not rely on the combo box dropping in any particular direction.
– Cody Gray♦
Jun 4 '17 at 11:57
It's possible to achieve this effect by subclassing the control and manipulating its behavior using Windows API functions. (Start with code like this.) But the problem with this is that the OS uses slide effects, and there's no way to change the direction of these, so it'll appear to slide down and then the drop down list will appear above it. Ugly. Perhaps you can explain why you need to worry about this, instead of letting the window manager handle it automatically? Your design should not rely on the combo box dropping in any particular direction.
– Cody Gray♦
Jun 4 '17 at 11:57
1
1
Well, no, because there's plenty of room to display it on top of your oversized taskbar.
– Cody Gray♦
Jun 4 '17 at 11:59
Well, no, because there's plenty of room to display it on top of your oversized taskbar.
– Cody Gray♦
Jun 4 '17 at 11:59
|
show 10 more comments
2 Answers
2
active
oldest
votes
This is not easy when working with WinForms, but I could give you my idea.
You should know that even when the combobox visible property is set to false, its' dropdown menu can still be displayed programmatically.
So the idea is that creating a user control that contains 2 comboboxs:
Example of my user control
The upper combobox is invisible. When user clicks the main, below one, the upper one will be relocated and drop down.
private void cbb_main_Click(object sender, EventArgs e)
{
cbb_2.Location = new Point(cbb_main.Location.X, cbb_main.Location.Y - cbb_2.Size.Height - (cbb_2.ItemHeight *cbb_2.Items.Count));
cbb_main.DroppedDown = false;
cbb_2.DroppedDown = true;
}
Finally, add your custom control to the form and give it a try!
Result image here!
I hope this is what you're looking for.
answered Jun 4 '17 at 12:24
Rogger TânRogger Tân
7736
add a comment |
If there is enough in your combobox, and your form is low enough, that the contents of the combobox hits as far as very near the bottom of the screen, then it will open upwards.
Downwards
Now i'll drag the form down a little bit. (Or I could add some elements to the combobox) And you see it opens upwards.
Upwards
Sure it would be better if it popped upwards when it covered a bit of taskbar(or if the combobox took priority in z-order, which it doesn't seem to). An annoying thing is if it's in a limbo where it is covering the taskbar 'cos the contents aren't falling low enough for it to pop upwards. Then when you select something low in the combobox you also hover over something in the taskbar, then windows 7 can open eg an explorer window as you hover over a group of them in the taskbar. (And btw that issue exists whatever size your taskbar is). But in that scenario, as this answer says, you could drag the form a bit lower to get around that.
answered Nov 23 '18 at 14:13
barlopbarlop
4,64354568
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f44353741%2fc-sharp-winforms-how-can-i-make-a-combobox-open-upwards-is-there-one-that-doe%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
This is not easy when working with WinForms, but I could give you my idea.
You should know that even when the combobox visible property is set to false, its' dropdown menu can still be displayed programmatically.
So the idea is that creating a user control that contains 2 comboboxs:
Example of my user control
The upper combobox is invisible. When user clicks the main, below one, the upper one will be relocated and drop down.
private void cbb_main_Click(object sender, EventArgs e)
{
cbb_2.Location = new Point(cbb_main.Location.X, cbb_main.Location.Y - cbb_2.Size.Height - (cbb_2.ItemHeight *cbb_2.Items.Count));
cbb_main.DroppedDown = false;
cbb_2.DroppedDown = true;
}
Finally, add your custom control to the form and give it a try!
Result image here!
I hope this is what you're looking for.
answered Jun 4 '17 at 12:24
Rogger TânRogger Tân
7736
add a comment |
This is not easy when working with WinForms, but I could give you my idea.
You should know that even when the combobox visible property is set to false, its' dropdown menu can still be displayed programmatically.
So the idea is that creating a user control that contains 2 comboboxs:
Example of my user control
The upper combobox is invisible. When user clicks the main, below one, the upper one will be relocated and drop down.
private void cbb_main_Click(object sender, EventArgs e)
{
cbb_2.Location = new Point(cbb_main.Location.X, cbb_main.Location.Y - cbb_2.Size.Height - (cbb_2.ItemHeight *cbb_2.Items.Count));
cbb_main.DroppedDown = false;
cbb_2.DroppedDown = true;
}
Finally, add your custom control to the form and give it a try!
Result image here!
I hope this is what you're looking for.
answered Jun 4 '17 at 12:24
Rogger TânRogger Tân
7736
add a comment |
This is not easy when working with WinForms, but I could give you my idea.
You should know that even when the combobox visible property is set to false, its' dropdown menu can still be displayed programmatically.
So the idea is that creating a user control that contains 2 comboboxs:
Example of my user control
The upper combobox is invisible. When user clicks the main, below one, the upper one will be relocated and drop down.
private void cbb_main_Click(object sender, EventArgs e)
{
cbb_2.Location = new Point(cbb_main.Location.X, cbb_main.Location.Y - cbb_2.Size.Height - (cbb_2.ItemHeight *cbb_2.Items.Count));
cbb_main.DroppedDown = false;
cbb_2.DroppedDown = true;
}
Finally, add your custom control to the form and give it a try!
Result image here!
I hope this is what you're looking for.
answered Jun 4 '17 at 12:24
Rogger TânRogger Tân
7736
This is not easy when working with WinForms, but I could give you my idea.
You should know that even when the combobox visible property is set to false, its' dropdown menu can still be displayed programmatically.
So the idea is that creating a user control that contains 2 comboboxs:
Example of my user control
The upper combobox is invisible. When user clicks the main, below one, the upper one will be relocated and drop down.
private void cbb_main_Click(object sender, EventArgs e)
{
cbb_2.Location = new Point(cbb_main.Location.X, cbb_main.Location.Y - cbb_2.Size.Height - (cbb_2.ItemHeight *cbb_2.Items.Count));
cbb_main.DroppedDown = false;
cbb_2.DroppedDown = true;
}
Finally, add your custom control to the form and give it a try!
Result image here!
I hope this is what you're looking for.
answered Jun 4 '17 at 12:24
Rogger TânRogger Tân
7736
answered Jun 4 '17 at 12:24
Rogger TânRogger Tân
7736
answered Jun 4 '17 at 12:24
Rogger TânRogger Tân
7736
answered Jun 4 '17 at 12:24
Rogger TânRogger Tân
7736
7736
add a comment |
add a comment |
If there is enough in your combobox, and your form is low enough, that the contents of the combobox hits as far as very near the bottom of the screen, then it will open upwards.
Downwards
Now i'll drag the form down a little bit. (Or I could add some elements to the combobox) And you see it opens upwards.
Upwards
Sure it would be better if it popped upwards when it covered a bit of taskbar(or if the combobox took priority in z-order, which it doesn't seem to). An annoying thing is if it's in a limbo where it is covering the taskbar 'cos the contents aren't falling low enough for it to pop upwards. Then when you select something low in the combobox you also hover over something in the taskbar, then windows 7 can open eg an explorer window as you hover over a group of them in the taskbar. (And btw that issue exists whatever size your taskbar is). But in that scenario, as this answer says, you could drag the form a bit lower to get around that.
answered Nov 23 '18 at 14:13
barlopbarlop
4,64354568
add a comment |
If there is enough in your combobox, and your form is low enough, that the contents of the combobox hits as far as very near the bottom of the screen, then it will open upwards.
Downwards
Now i'll drag the form down a little bit. (Or I could add some elements to the combobox) And you see it opens upwards.
Upwards
Sure it would be better if it popped upwards when it covered a bit of taskbar(or if the combobox took priority in z-order, which it doesn't seem to). An annoying thing is if it's in a limbo where it is covering the taskbar 'cos the contents aren't falling low enough for it to pop upwards. Then when you select something low in the combobox you also hover over something in the taskbar, then windows 7 can open eg an explorer window as you hover over a group of them in the taskbar. (And btw that issue exists whatever size your taskbar is). But in that scenario, as this answer says, you could drag the form a bit lower to get around that.
answered Nov 23 '18 at 14:13
barlopbarlop
4,64354568
add a comment |
If there is enough in your combobox, and your form is low enough, that the contents of the combobox hits as far as very near the bottom of the screen, then it will open upwards.
Downwards
Now i'll drag the form down a little bit. (Or I could add some elements to the combobox) And you see it opens upwards.
Upwards
Sure it would be better if it popped upwards when it covered a bit of taskbar(or if the combobox took priority in z-order, which it doesn't seem to). An annoying thing is if it's in a limbo where it is covering the taskbar 'cos the contents aren't falling low enough for it to pop upwards. Then when you select something low in the combobox you also hover over something in the taskbar, then windows 7 can open eg an explorer window as you hover over a group of them in the taskbar. (And btw that issue exists whatever size your taskbar is). But in that scenario, as this answer says, you could drag the form a bit lower to get around that.
answered Nov 23 '18 at 14:13
barlopbarlop
4,64354568
If there is enough in your combobox, and your form is low enough, that the contents of the combobox hits as far as very near the bottom of the screen, then it will open upwards.
Downwards
Now i'll drag the form down a little bit. (Or I could add some elements to the combobox) And you see it opens upwards.
Upwards
Sure it would be better if it popped upwards when it covered a bit of taskbar(or if the combobox took priority in z-order, which it doesn't seem to). An annoying thing is if it's in a limbo where it is covering the taskbar 'cos the contents aren't falling low enough for it to pop upwards. Then when you select something low in the combobox you also hover over something in the taskbar, then windows 7 can open eg an explorer window as you hover over a group of them in the taskbar. (And btw that issue exists whatever size your taskbar is). But in that scenario, as this answer says, you could drag the form a bit lower to get around that.
answered Nov 23 '18 at 14:13
barlopbarlop
4,64354568
edited Nov 23 '18 at 14:18
answered Nov 23 '18 at 14:13
barlopbarlop
4,64354568
answered Nov 23 '18 at 14:13
barlopbarlop
4,64354568
answered Nov 23 '18 at 14:13
barlopbarlop
4,64354568
4,64354568
add a comment |
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f44353741%2fc-sharp-winforms-how-can-i-make-a-combobox-open-upwards-is-there-one-that-doe%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Not possible unless you write a control of your own.
– Koby Douek
Jun 4 '17 at 11:53
4
Drag the form to the bottom of your screen, then open the combo box. Like magic, it opens upwards!
– Cody Gray♦
Jun 4 '17 at 11:54
@KobyDouek perhaps one has been written that I can use?
– barlop
Jun 4 '17 at 11:54
It's possible to achieve this effect by subclassing the control and manipulating its behavior using Windows API functions. (Start with code like this.) But the problem with this is that the OS uses slide effects, and there's no way to change the direction of these, so it'll appear to slide down and then the drop down list will appear above it. Ugly. Perhaps you can explain why you need to worry about this, instead of letting the window manager handle it automatically? Your design should not rely on the combo box dropping in any particular direction.
– Cody Gray♦
Jun 4 '17 at 11:57
1
Well, no, because there's plenty of room to display it on top of your oversized taskbar.
– Cody Gray♦
Jun 4 '17 at 11:59