I have a Picture boxes inside a parent label and I want to be able remove them all. I tried MyLbl.controls.clear() and that didn't do anything, I did not get an error, just nothing happened. I tried giving them tags and looping through all controls In the form looking for the tag but it never found them.
Is there a way to do this?
WinForms Label control does not allow adding child controls by default using designer, even if picture boxes appear above the label. Unless you explicitly said MyLbl.Controls.Add MyPicture1, the picture box is actually child of your Form or some other container.
You can check this by going to View > Other Windows > Document Outline in Visual Studio when a form designer is open.
In case picture box is child of a form, you'll have to remove related controls from form's Controls collection.
But to simplify this, you can just add a GroupBox or Panel to your Form, and place PictureBoxes there. Then, you can do MyGrpBox.Controls.Clear().
Related
I want users entering data across multiple tabs to be able to see at a glance whether and where they have validation errors / fields not populated. I can indicate errors for the selected form in the form body, but for unselected tabs I want to use red color and/or a red icon in the tab to indicate if it is failing validation.
I see various posts explaining how to use a custom renderer or effect to set tab text color for all tabs or selected/unselected tabs (e.g. here, here, here modifying the framework itself and here). However, the posts I've seen do not show a way to change the color of a SPECIFIC tab. In this case I want to either change the color or add/remove an error icon that would show beside the Title in the tab header based on the validation results for the page accessed via the tab. Is that possible?
Update:
I also found this - seemed more promising because it does seem to change tabs based on their positions or title rather than just on whether they were selected or not, but it seems to be dependent on using bottom tabs, which I'm not doing.
I also have found this, and element.Children[i] does get me the ContentPage from which I can determine what color I want the tab's test to be, and it's possible that the tab variable that's returned by activity.ActionBar.GetTabAt(i) somehow gives me access to update the tab's text color, but I'm not seeing any method or property that seems promising - basically I still don't see how to get access to the UITabBarItem so I can call SetTitleAndAttributes on it to set its text color. (Also, if I declare the tab variable by its type of Android.App.ActionBar.Tab instead of using var, I get a note saying that type has been deprecated. It seems upon investigation that the whole ActionBar class has been deprecated. But how can that be when it still exists as a property of Android.App.Activity, which is not deprecated?)
Many thanks for your assistance!
in a List view I want a particular control (textbox) to have a red background color if it has a certain value. I have tried the following:
Click on the textbox then click the Data icon in the context sensitive controls that appear. I can then see that the name of the control is First_NameTextBox. I then click anywhere on the List view and click the Actions icon in the context controls that appear to the right of the view. I select "On Current". I then create two steps that should be executed whenever a new record is activated:
If [First_NameTextBox] = "somevalue" Then
SetProperty
Control Name [First_NameTextBox]
Property BackColor
Value #FF0000
End If
However, this turns the textbox red no matter what the value in First_NameTextBox is. How do I reference the CURRENT value of the textbox?
Conditional formatting based on a field value is not available for the List View in a Web App.
If you've built web pages (with or without a templating engine), the design limitations of Access can be frustrating.
Another kind of frustration comes from moving a form in Access from the native Access environment to a browser-based display.
I've felt the first kind of frustration, but so far I've avoided the second kind. I keep MS Access and HTML-rendered forms far away from each other.
Conditional Formatting in the List View of Access Web Apps is Available its just way harder than it should be.
Input "If Statement" under the "Current Macro" by clicking outside any text box or label then traveling to the top right of the view and you will see the Lightning bolt which allows two options, "On Load" and "On Current".
SELECT ON CURRENT
Don't forget You will need to set the control back to the original color by using the else. (also, for some reason I have to flip the Colors so where you would think red would go, Put White.
Example:
IF = "" True Then
White
Else
Red
END IF /DONT ASK ME WHY!
Summary: your Code is Sound, Just input it under the Views Current Macro Location
This is my first post, i spent DAYS looking for this information and found in the deep google somewhere so i hope this helps you.
Say, I have an Image control (which seems to be a window-less control) and I want to make sure that it is on top of a TextBox. No matter what I do, the Image control will not appear on top of the Text box.
Is there a way?
P.S. I know I can use a PictureBox, but it does not support transparency, thus I must have the Image control.
There is no way to place an image control over a normal textbox as they are drawn onto the form itself so will always be below any other windowed components.
If you have VB6 installation media there are drawn (windowless) versions of controls including a TextBox you can use that will (probably) do what you want; http://support.microsoft.com/kb/184687
A custom usercontrol of some kind if probably better .. what is it exactly you want to overlay the textbox with?
The Image Control is considered a graphical control, like shapes, so it is always inferior to text controls. If you really want a transparent image, you can use a Microsoft 2.0 Form instead(only if you have it). Images there can be on top of textboxes, and you can make it transparent by setting the Backstyle to Transparent(0).
Completely different approach to my other answer (hence the seperate Answer), but you can set AutRedraw and ClipControls on your Form to false and it will allow the Image control to render on the same layer as a windowed control. You can get some flakey redrawing in some cases but for a quick solution you could try it.
http://msdn.microsoft.com/en-us/library/aa733621(v=vs.60)
I've created a tranparent overlay control to add a kind of annotation layer on top of a VB6 app. I'll attempt to describe it from memory, and if that doesn't provide enough information then you can post back and I'll try to dig up the code.
First, add a new USerControl to you application. Give it a name like ImageEx, PictureEx, or TransparntImage. There are several properties that you will need to use. Ensure the control is Windowed, so it can sit on top of other windowed controls. Locate the MaskColor property and set it to Cyan (or whatever color you elect to use to indicate a tranparent area. There might be an addition property enable the masking behavior, just browse the properties. Set the control background color to that of the MaskColor. At this point you have an invisible control. In my control I painted on top of the surface for annotations, but you can PaintPicture or maybe even set the image property for a really simple approach.
Of course, to make this a re-usable control, you will want to code in your own properties that allow the MaskColor and image, etc to be set so that you can the drop one of these on any form you want.
Some links:
MaskColor Property
MackPicture Property
1) Remove all your textboxes , labels and ... (But memorize their name and location in the form)
2) Go to (project > components) and mark the (Microsoft Forms 2.0 Object Library) then click ok
3) Now you can see new controls under your default controls in your toolbox...
4) Use its textbox and label controls instead of the default controls
5) Right click on your Image Control then click (Bring To Front)
This may not be the kind of question one should ask on StackOverflow, but here's a frustration that I've been trying to find a work-around for.
When using the form designer, suppose the entire form does not fit in the space allotted to the form designer, and I have a control say, down near the bottom of the form.
If I try to re-size that control, or move it using the mouse, the work area will auto-scroll to the top of the work area. This essentially pulls my control to the top of the screen. It isn't possible to scroll with the scroll wheel while "holding" a control, and even ScrollLock does nothing for me.
Is there any way to just turn the auto-scrolling off? That way I can at least work on my form without guessing numbers to type into the properties window.
Can't you just turn off autoscroll for the form?
I think it's off by default.
Form.AutoScroll = False
I'm running into a problem trying to anchor a textbox to a form on all 4 sides. I added a textbox to a form and set the Multiline property to True and the Anchor property to Left, Right, Up, and Down so that the textbox will expand and shrink with the form at run time. I also have a few other controls above and below the textbox.
The anchoring works correctly in Visual Studio 2005 (i.e. I can resize the form and have the controls expand and shrink as expected), but when I run the project, the bottom of the textbox is extended to the bottom of the form, behind the other controls that would normally appear beneath it. This problem occurs when the form loads, before any resizing is attempted. The anchoring of the textbox is correct for the top, left, and right sides; only the bottom is malfunctioning.
Has anybody heard of this and if so, were you able to find a solution?
Thanks!
UPDATE:
Here is some of the designer code as per Greg D's request (I am only including the stuff that had to do with the textbox itself, not the other controls):
Friend WithEvents txtRecommendationText1 As System.Windows.Forms.TextBox
<System.Diagnostics.DebuggerStepThrough()> _
Private Sub InitializeComponent()
Me.txtRecommendationText1 = New System.Windows.Forms.TextBox
' ...snip...
'txtRecommendationText1
Me.txtRecommendationText1.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
Or System.Windows.Forms.AnchorStyles.Left) _
Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
Me.txtRecommendationText1.Location = New System.Drawing.Point(4, 127)
Me.txtRecommendationText1.Multiline = True
Me.txtRecommendationText1.Name = "txtRecommendationText1"
Me.txtRecommendationText1.Size = New System.Drawing.Size(223, 149)
Me.txtRecommendationText1.TabIndex = 10
End Sub
ANOTHER UPDATE:
The textbox I originally posted about was not inherited from a baseclass form (although it was added to a custom User Control class; I probably should have mentioned that earlier), but I recently ran into the same problem on a totally unrelated set of controls that were inherited from a baseclass form. It's easy to blame these problems on possible bugs in the .NET framework, but it's really starting to look that way to me.
Is your Form localized? Check the resource files for an entry with Textbox.Size, delete is and reset the size.
Is your Form inherited and is the Textbox on the baseform? Try setting the Textbox's access modifier to Protected or Public.
Have you implemented custom resize logic? Turn it off and see if the problem is still there.
Have you entered a Textbox.MinimumSize/MaximumSize? Remove or change the value.
It might also be a combination of these things...
Does the form snap back to the expected layout when you resize it after it's been initialized weirdly? Also, have you set a Height or MinimumHeight/MaximumHeight property for the text box?
If possible, a few snippets from the designer code might be useful. :)
One possibility that I've run into in the past is DPI. If you're running/testing your code on a machine with a different DPI setting than the machine that you're developing on, you may observe some strange things.
The anchor functionality essentially establishes a fixed distance between the edge of a control and the edge of the control's parent. Is your textbox embedded within another control (e.g., a panel) that doesn't have its anchors properly set? Right clicking on the text box in the designer should pop up a menu that lets you select any controls that exist underneath it, also.
Does your program include any custom resize logic, or does it modify the size of the textbox programmatically outside of designer-generated code? That might also result in weird behavior. I've assumed maintenance for a number of pieces of software at my organization where the original developers spent a great deal of time implementing (buggy) resize logic that I had to tear out so that I could just let the designer-generated code do the work for me.
The textbox I originally posted about was not inherited from a baseclass form (although it was added to a custom User Control class; I probably should have mentioned that earlier), but I recently ran into the same problem on a totally unrelated set of controls that were inherited from a baseclass form. It's easy to blame these problems on possible bugs in the .NET framework, but it's really starting to look that way to me.
It's very likely because of the 'AutoScaleMode' property being set in InitializeComponent(). Try setting it to 'None' and see if that fixes it. I've had these problem a couple of times now.