Handle Value Change Of Control Inside UserControl Inside FlowLayoutPanel?
Apr 30, 2012
I am making an invoicing application. I have a label (lblCost) inside of a UserControl (InvoiceEntry) inside of a FlowLayoutPanel (pnlEntries). InvoiceEntry represents a line item on the invoice, and pnlEntries is the "body" of the invoice. pnlEntries can hold several InvoiceEntry controls.
I am attempting to sum all of the lblCost values from each InvoiceEntry control to make a subtotal, and I want that subtotal to change automatically if costs are changed (e.g., a change in quantities being ordered). Is there a way to handle when the lblCost.Text property of any of the InvoiceEntry controls contained within pnlEntries changes?
InvoiceAdd.vb:
' Instantiate objects of the various database interaction classes.
Private mCustomer As New Customers
Private mItem As New Items
[code]....
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May 3, 2010
I have a listBox inside a userControl I would like to declare in another class.. the lstBox1 is databound inside the userControlNo work.. ??'Dim lstC as listBox = userControl1.Controls("lstbox1")
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Feb 24, 2011
Currently my code is this:
[Code]...
But it won't select any checkboxes inside a flowlayoutpanel. Is there a way to select all checkboxes in the form or to save some lines by saying all 3 controls?
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Oct 27, 2011
I have a DataList inside another DataList. I want to access the child DataList "dlQuestion" events, ItemDataBound event. Also, I'm tring to find the control LableControl "lblQuestion" in the child datalist. How do I do that? Here's the mark-up:
<asp:DataList ID="dlSection" runat="server" Width="100%">
<ItemTemplate>
<div>
[code].....
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May 31, 2009
how I can get this to work. I want to distinguish dropdown controls inside a repeater control. I understand now about the lifecyle and how the buffer is already writen, but what are my alternatives? Here is what happens
Code File
Dim repeatTimes((TotalAdInsured - 1)) As Integer
myRepeater.DataSource = repeatTimes
myRepeater.DataBind()
[Code]....
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Apr 6, 2010
I am putting together a simple multiple column listbox. I call it Gridbox.The intent is to make a lightweight grid control mainly for displaying lists with columns. Minimal cell access i supported.
I wrote it with an IntegralWidth as well as an IntegralHeight.Of course I cannot support the Integral Width if there isn't at least one column in the Columns collection when the control is initialized.
To this end I call a Column Add() method in the UserControl New() Event.
So that one Column will be present when the control is placed on a form.
For some reason the New() UserControl Event is firing twice. So I end up with two columns not one.
I was under the impression that New() only fired once when the control was intialized. Where would
I put the code that creates the desired column if not there?
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Jun 5, 2012
I have a UserControl inside UpdatePanel, how to update the user control when clicking a button
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Jan 29, 2011
I have a usercontrol in my application and inside of this usercontrol I have a declaration:
[Code]....
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Sep 8, 2009
I want to set the value of x that is the location of the controls inside a selected usercontrol at runtime. i want to set it to be 0 when there is no control on the usercontrol and i want it to be x += control.width. how can i do this, maybe how can i detect that there is a control inside the usercontrol.
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Feb 12, 2012
Well the title pretty well describes my problem. Here is a little bit more detailed description of my problem: I am building an application with a TabControl, which I populate at execution time with TabPages. In my first version of the code, these TabPages were filled with a children ListView. The ListView was also created in code, using AddHandlers to link it to the DragEnter and DragDrop routines. Everything worked very well... Now as I need some other controls on every TabPage, instead of creating every single control in code, I have created a UserControl containing a ListView and a few Buttons, which I instantiate for every new TabPage. The problem now is that the DragDrop event is not raised anymore
[Code]...
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Jan 9, 2012
I know this idea of - if message boxes are used to display error messages inside a .dll and when the .dll is installed in a different computer (possibly a server machine), errors occurring inside that .dll will be shown in the server and not to the user. Since practically there will not be a person near the server to click 'OK' to the error message every time it occurs it will stuck the programs using the .dll.
So how to write exception handling to a .dll project?
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Aug 5, 2011
What is the best way to handle a function that might occasional fail to evaluate, but even when it does fail does not require a halt of the parent routine, though sometimes might require an explanation to the user?I have such a function, deep in my code, that returns a number. Codingwise, the simplest approach would be to make the function nullable, and return null when it can't evaluate. That way the calling routine can continue while also knowing the function failed to return a number.
However, depending upon the circumstances, sometimes I want to display the reason for the fail to the user so they know what to fix. Obviously just returning null isn't enough information. Should I be raising messages inside the function itself as it evaluates for anonymous listeners to catch, to be displayed if desired?(For those rightfully pointing out that logic functions shouldn't be responsible for creating user messages, I didn't mean to imply the function generates the full text message, just somehow transmits the reason for the problem so that the UI could later parse that into a message)
The other option I suppose would be throw exceptions inside the function if it can't evaluate, then catch and interpret to user messages if desired. However, as stated the inability to evaluate typically does not signify a halt to the routine, and now I'd have to put a Try...Catch block around the function call everytime I use it.
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Sep 5, 2010
So, I have a textbox with the following text.
Code:
TITLE"Hello there"
blah blah blah etc...
I want my program to find the TITLE text, and then put the text in the double quotations in a variable.
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Apr 13, 2011
In my windows application I have a normal panel inside a flowlayoutpanel In this normal panel, i have some input controls(e.g. labels, textbox...) I have set the anchor properties thinking that it will auto-resize when I resize the window. But when i tested it, only the flowlayoutpanel auto-resize itself, as i can see that the sroll bar has moved further toward the right... the contorls in the normal panel didnt move at all.
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Mar 30, 2010
im new to coding (started coding last month) so im a little stuck on how to do this, im making some emulation programs to learn coding with, and a part of it is to point the app to a .iso/.bin file and scan the data inside of the iso/bin to check if a file exists.[code]My issue is i cant find any class examples, or any information etc on how to code it so my application can see the data inside of the iso/bin instead of just see'ing the iso/bin file, so that i can then check the data inside the iso to see if the file exists etc.Im a novice still at coding so making a new class myself to look inside the iso/bin is to complex for me.
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May 31, 2009
I have a text file to be read and match the matching line and write all the matching line in new file. I can do until that. This is my code for that.[code]...
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May 19, 2009
Is it possible to change many labels inside a for loop? Let's say I have labels 1 to 4. Can I do something like:
for i = 1 to 4
label%i.text = some text
next
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Jan 1, 2010
I have a panel that I am writting text into troughout the applications use. I would like to be able to make some of the words in the panel bold and others non-bold.
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Jul 29, 2009
I've created my own ascx control with button inside it. Now I'm using this control inside other control. (In my case it is a webpart). What I would like to do is program button.click logic from my custom control inside webpart
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Feb 12, 2011
I have an asp.net usercontrol which represents a "popup" dialog. Basically, it's a wrapper for the jQuery UI dialog which can be subclassed to easily make dialogs. As part of this control, I need to inject a div into the page the control is used on, either at the very top or very bottom of the form so that when the popup is instantiated, it's parent is changed to this div. This allows "nested" popups without the child popup being trapped inside the parent popup.
The trouble is, I can't find a safe way to inject this div into the page. A usercontrol doesn't have a preinit event, so I can't do it there, and calling Page.Form.Controls.Add(...) in Init, Load or PreRender causes the standard exception "The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases."
I thought I had found a solution by using. ScriptManager.RegisterClientScriptBlock(Page, Me.GetType, UniqueID + "_Dialog_Div", containerDiv, False) which seemed to work well normally, but recently a coworker tried putting an UpdatePanel inside the dialog and now she's getting the error "The script tag registered for type 'ASP.controls_order_viewzips_ascx' and key 'ctl00$ContentBody$OViewZips_Dialog_Div' has invalid characters outside of the script tags: . Only properly formatted script tags can be registered."
How are you supposed to add controls to the pages control collection from inside a user control?
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Dec 31, 2010
Lets see if I can explain-I have a text box (rich text box) in a form. Inside the box, some data gets put in there- specifically insurance information.
Normally, the box doesn't need to change color to alert the user there's a problem with the text that's inside, because the information is usually good.But there are a few phrases that need to alert the user there's a problem.
For example, if the words "Not Found AS OF:" appear anywhere in the box, I need the background to show red.Or, if the words "Letter #1" appear in the box, it needs to show red. Absent of any key words, the box is normal (white).
[Code]...
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Jun 4, 2011
I have a text box (rich text box) in a form. Inside the box, some data gets put in there- specifically insurance information.Normally, the box doesn't need to change color to alert the user there's a problem with the text that's inside, because the information is usually good.But there are a few phrases that need to alert the user there's a problem.For example, if the words "Not Found AS OF:" appear anywhere in the box, I need the background to show red. Or, if the words "Letter #1" appear in the box, it needs to show red. Absent of any key words, the box is normal (white).[code]
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Jun 21, 2010
change location of text inside list box
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May 1, 2009
Can I change the location of the text inside listbox. I have three text box button and the listbox. When I click the button the text on the button will go to list box but I want it in such a way that I can define the location of the text, current it add iexjohn13black.
I want list box like below:
name age house color
john 13 black
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Apr 14, 2009
I have a "partial" class in VB.NET. Half of it is auto generated by a code generation tool. That half implements INotifyPropertyChanged, so any properties in that part of the partial class raise the PropertyChanged event.In my "custom" part of the class, I declare another property that depends on one of the properties in the auto-generated side. Therefore, when that auto-generated property changes, I also want to raise a PropertyChanged event on my custom property that depends on it.
If I go into the generated part of the class and raise the event there, that will get overwritten if I ever re-generate that part, so I don't want to do that. I would rather add an event handler in my side of the partial class that checks if the generated property changed, and if so, raise another event for my custom property.
[Code]...
I'm assuming it's because normally you'd use the WithEvents keyword to tell the compiler that you're subscribing to events from that object. I don't have a clue how to do this inside of the class that's actually raising the event, or if that's even possible.
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Apr 24, 2009
I have a gridview and the one coulmn is a image column. How would i change the DataImageUrlFormatString value in my code behind?
i tried doing this but it does not work.......
((ImageField)(GridView2.Rows[0].Cells[0].FindControl("ID"))).DataImageUrlFormatString
= "~/createthumb.ashx?gu=/pics/gmustang06_2.jpg";
[code].....
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Jan 15, 2012
How I can change Autocad information inside block Attributes(I think on width, rotate, text style, layer, height..etc ) in visual basic? For example, We have some block with 2 attributes and I want replace width factor.
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May 30, 2012
This is my first time using WPF. It has been a bit of a nightmare, but I've done enough of the project that I now don't want to start all over again with a forms application.
My problem is this: I have 50 textboxes inside an expander, which in turn is inside a stackpanel. I need to store the value of each textbox in an array. In forms I would probably do it something like this (I am using vb.net by the way):
Dim i As Integer
Dim values() as string
For i = 0 To 49
values(i) = form1.Controls("TextBox" & i).text
Next i
(Assuming my textboxes were named Textbox1, Textbox2, Textbox3 etc.)
How can I do this in WPF? I've tried using Trees (I think they're called?) but have failed every time and now given up.
Oh, I also forgot to mention that there are also other controls in the expander (labels that are paired with the textboxes).
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Oct 24, 2011
I have a .NET ActiveX/COM Object which has a WebBrowser control (among other controls such has buttons, etc) inside it.
This object seems to load fine, the buttons are displayed and working but, for some reason, the WebBrowser control doesn't show up!
Is there some limitation for this in IE (e.g., is IE afraid of something recursive, etc.)? Is there a way that I can overcome it?
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Jul 26, 2011
Getting value of a PasswordBox that's inside a ListView [code]...
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