In my page_load event I have this code :
myTextbox.focus().
So when I set my textbox to visible=false my code doesn't work.
Hidden controls are not focusable. Set the Opacity to 0 instead.
You cannot. If something isn't rendered, it cannot be interacted with, so you cannot set the focus to it.
Focus means that user input is focused to the control, that means if the control is a text-box, the text input cursor will be placed in the control or if it is a checkbox, the checkbox will be focused and may be selected by pressing space, you can't put a text input cursor in a hidden control and it cannot be used for any user input.
If you still want to set focus for some reason, try setting its height and width to Zero.
Like style="height:0px; width:0px"
and use Page.SetFocus(yourControl); to set focus
When you set the Control.Visible property to false it doesn't just hide the control on the page. It omits that control from being rendered on the client's browser entirely, but "remembers" everything about that control on the server for future postbacks.
If you actually do a client side hide (i.e. set the CSS Style display: none; then it will still exist on the page, but just be hidden. At that point you can focus it.
Related
I have a simple ToolStrip with buttons in it which contain images and text. When I go over that button it changes appearance (same when it gets clicked). How can I customize this so that it stays highlighted when clicked? I have to do this over a tabControl so that it stays highlighted when the tab is entered and gets back to its normal appearance when leaving the tab. Which methods do I have to override?
Thank you!
just set ToolStripButton.CheckOnClick property to true from design time. So it will stay highlited when clicked.
About the other requirement set ToolStripButton.Checked to true on entring the tab control, and set it to false on leaving the tab control.
For entering and leaving you may use Control.Leave & Control.Enter events of tabpage/tabcontrol.
Let me know incase of any issues
This is going to turn out to be simple, I'm sure, but I couldn't find anything on Google about this. I have a Winforms application that has a textbox. When I hit the TAB key, the cursor is jumping to the next control. What I want instead is for an actual tab (or 4 spaces) to be inserted into my textbox. What property am I missing?
You should set the AcceptsTab property to true on your TextBox. This will insert an actual TAB character.
From the MSDN page:
The Multiline property must also be true to get a TAB character in the control.
If the AcceptsTab property is set to true, the user must press CTRL+TAB to move the focus to the next control in the tab order.
When set a TooltipText on a control, and the tooltip text will be shown when user move mouse on the control. Tooltip will detect MouseEnter or MouseLeave or anything for this purpose?
I want to know how does a Tooltip show Popup on a control?
Assume that I have a user control with name 'UserControlX'. On UserControlX, I put a button and set Dock property to Fill. I add a UserControlX on Form1, add a ToolTip and set a text to this usercontrol. ToolTip will be not shown when user move mouse on control because user is moving mouse on usercontrol's button, not usercontrol, so the tooltip will never show.
Please help me how to solve this problem so that when move mouse on UserControlX, the tooltip will be shown. Thanks.
I believe the tooltip displaying on mouse-over is defined within the control's default template. if you view the default template you will likely see a reference to a tooltip in there. If you go further and view the Tooltip's default template, you will see how it is composed as well as what events it listens to.
To answer your question, you could do what Adrian suggests and put the tooltip on the button as well as the parent control.
If you have time to mess around a bit, you COULD try to see if there is a tooltip displayed event or something to that effect for the button, and then simply invoke the parent control's tooltip manually. It could be considered a hack, but worth a try, maybe.
I've come across the strangest bug pertaining to DataGridViews in Windows Forms.
I have a TabControl, that is supposed to contain a docked DataGridView in each tab page. I thought it would be convenient that the grid is focused upon changing the tab page, so that the user could simply hover the mouse over the grid and start scrolling when he changes the page. So, I just put a grids[tabs.SelectedIndex].Focus() in the event handler for changing the tab page.
However, something really strange happened. In my test application, I have three tab pages. If I try scrolling the grid right after starting the application, it doesn't work; I have to click in the grid first. I was expecting this. However, if I change the tab page, I can't scroll in any of the other grids until I click, except for the first one!
So, if I switch pages to the second page, then back to the first, I can automatically scroll that grid without clicking, but if I then switch to the third, I have to click for the grid to focus.
I had a look at the CanFocus properties of the grids, and it seems that only the first grid has it set to True. They are all created programmatically, and all in the same way. I don't see why they would be different.
Any ideas?
Inactive tab pages have their Visible property set to false. The documentation for CanFocus says:
In order for a control to receive
input focus, the control must have a
handle assigned to it, and the Visible
and Enabled properties must both be
set to true for both the control and
all its parent controls
Well, I solved it. Stupid programming error on my part, I had grids[tabs.TabIndex].Focus() instead of grids[tabs.SelectedIndex].Focus().
Oh well.
How to focus an image in Silverlight?
For example: imagine that when my page loads, It will focus on a texbox, so I don't have to click in there to control. I want the same with image control.
There is no way for an Image to acquire input focus directly.
Input focus is supported only on Controls and its descendants which have the properties IsEnabled and IsTabStop set to true. Image is derived from FrameworkElement, not from Control, so it's not technically a control.
You could create a UserControl that contains the image and then call .Focus() on the container control.
It sounds like you want to make a button of the image and than set the button with the default focus.
Make a button with an image
Set button with focus