Asp.net - Render .net Controls To String And Get Events To Fire
Jul 28, 2011
I have this issue where I'm trying to generate HTML to display on the page that is coming from the database in form of a template that has different curly brackets that get replaced with dynamic content at run time. For example curly bracket {Content} gets replaced with a few checkboxlists, radiobuttonlists, textboxes and a submit button. The way I'm doing this is by creating controls dynamically and rendering them as string and then outputting that string to the browser. But what this does is, it doesn't recognise the events assigned to the controls when they are generated. I may be taking a wrong approach to the issue, but I don't really see how else this can be achieved. I have put up some sample code below to show what I'm trying to achieve.
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
[Code]....
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Apr 11, 2011
I have little problem. I change the textbox value in pageload time. the textbox change event calling automatically. how to stop that?
[Code]....
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Mar 9, 2010
I trying to be notified when a directory is created, deleted, renamed or moved. The VB.NET code below only shows the Rename event.
Imports System.IO
Imports System.Threading
Public Class Form1
[Code].....
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Mar 6, 2009
I have a very simple app working well, problem is that it does not close properly. If the user uses the little "X" to close it, it still remains running, just becomes invisible. The X does not fire the closing/closed events..All I can figure out is that to get it to properly close I need to use "Me.Close()" with a button or menu item.I could remove the standard X and force them to use my own close button but that is rather silly..
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Apr 5, 2011
I'm working on a website that creates pdfs dynamically.I've been playing around with two different pdf controls- wpcubed and abcpdf, and was surprised to see that they both appear to render text differently.
wpCubed:
abcpdf:
They are both using arial 25pt bold, so I was expecting them to look identical. Can anyone explain why they don't. Here are the full files: wpCubed , abcpdf
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Apr 23, 2011
I have some error in my code which causing my WinForm Data application to give Exception. First Record gets saved successfully but while saving 2nd one Exception occars.For this i want to See The List of Events & Subroutins that are called as soon as i hit Save Button in the Order they have Called.
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Aug 3, 2010
I looked everywhere for this but not sure if it can be done. Is there a way to fire events when a user clicks a specific tab. Here is the image to show it better:I am trying to have the program execute a special function when the user clicks on customer info.
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Jul 8, 2010
I've got a research application that is hosting a webbrowser control and I'm implementing a feature that allows the user to select text from a web page and drag it to various research note fields. The issue I have is the dragenter and dragdrop events continue after the initial drop, inserting the text multiple times. Here's the test case on my box and the result.
Select Text in Browser Drag to Text Box Drop Text What happens is after the drop event is fired and the text inserted to the drop target, when you move the mouse after dropping the text, the drag enter event is fired, followed by the dragdrop event, then another dragenter and dragdrop. So, selected text such as "Selected Text" becomes "Selected TextSelected TextSelected Text".
Note: The dragenter event is properly raised once when the mouse enters the textbox, however the mouse does not have to leave the textbox after the dragdrop event fires. i thought there was something wrong with my application so I created a simple test app, containing a Webbrowser and a multi-line text box. This test app generates the same results and the code is below. This is the first time, I've implemented
drag and drop operations and I followed the guidelines noted in this MSDN article. While I did what the article suggests, I'm thinking I need to note the event was handled somewhere.
[Code]...
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Jul 8, 2011
I'm working on a custom scroll bar. When dragging the slider, things work smoothing with what I have... that is if the users movements are smooth and slow-ish. When moving quickly the mouse move event doesn't seem to fire as accurately as I had hoped.. I attempted using the up and down buttons enter event for re positioning or "resetting" the slider whenragging is activated but still those events don't even fire when the mouse move event is firing. So I believe I hit a barrier of my .Net knowledge and hope someone here knows a way around this little issue.
Public Class Form1
Dim Dragging As Boolean
Dim mPointY As Integer
[code]....
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Jul 9, 2010
I have a program that reads data from a scanner via the serial port.This program works fine on Windows XP.We have a terminal server set up running Windows Server 2008.I run HyperTerminal on our test terminal, it connects and reads the scanner data fine through COM1.I run my app on that same test terminal and get nothing when I scan.My app connects to COM1 without errors and disconnects without errors.BUT, the DataRecieved event is NEVER getting fired.Neither is the ErrorReceived event.I have played with the Handshaking, with the RecievedBytesThreshhold and pretty much every setup setting I found.Set it up exactly like the settings on Hyperterminal.I have even tried starting a timer on a different thread to call ReadByte every second to try to KICK this thing into doing SOMETHING.Nothing has worked.
I have been trying to fix this for an entire day now.Added events to my class trying to see EVERYTHING that is going on. All I know is, it connects to the port and it disconnects from the port correctly but nothing happens in between.No data when I scan.No event fired at all between connecting to and disconnecting from the port.I have also downloaded other's simple serial communications applications.Nothing in .NET works.[code]
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May 20, 2011
I have three events to fire on button click. after running the first event i want to wait for 30sec to wait for nex event to fire. how i can wait( i mean looping for 30 secs).
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Mar 17, 2010
I am using about 5 different filesystemwatcher routines total. I am using the following
filewatch.NotifyFilter = NotifyFilters.CreationTime Or NotifyFilters.LastWrite
AddHandler filewatch.Created, AddressOf addfile
AddHandler filewatch.Changed, AddressOf addfile
filewatch.EnableRaisingEvents = True
However, there is one problem with it... whenever I open a file and change stuff, then close it without saving the changes, the events still fire. I am opening excel workbooks in code, then use xlsWB.Close(SaveChanges:=False) to close them, and the event still fires, where the file isn't really changed so it should not fire.
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Jul 7, 2010
I am trying to render a hyperlink to html. ( etc)
When the page loads it works fine. (and lots 10 links) on the update panel it hits the same function and tries to get another 10 links. I set the navigationURL to something like
"../Folder/Mypage.aspx?498592ghjgfosdfgo"
It is set identically both times(load and updatepanel postback) but when i try to render it to html the second time (on the update panel) it adds "../" to the front so i end up with
"../../Folder/Mypage.aspx?498592ghjgfosdfgo"
The function where it changes here
Public Shared Function RenderControl(ByVal c As Control) As String
Dim sw As New IO.StringWriter
Dim htmlw As New HtmlTextWriter(sw)
[Code]....
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Oct 26, 2009
I have an object that is defined as a global variable based on custom class. Within that class I have an event that gets fired a certain intervals. These events are fired on the same thread as where the object is declared. How do I create a global object, but have the events within that object fire on a separate thread?
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Jun 11, 2009
I need to render a partialview to a string, and I am trying to convert a C# example to VB.Net, as I am stuck with that for this project.This is causing me a headache from these two problems:
ObjectViewData - I can't figure out what that is
RenderPartial is a sub, but seems to be used as a function - I don' get it
I reference the MVCContrib.UI, so I don't need to convert that. But these two functions, I do need to convert:
[Code]...
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Aug 26, 2011
Im Using VB 2008. I have MsgBox() statements in all Mouse & Form Click events to TEST & NOTHING FIRES during Form Load when I click on Form or Button Controls !!! The Form Load event contains code for Displaying the Label.Text control many times with changes in the Text to simmulate annimation.
[Code]...
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Apr 13, 2012
I'm converting a VB project to C#, and I notice that in vb it will call a function like:[code]on the asp.net source page or it will never hit the function. Is this a necessity in c#, or is there something that I'm overlooking or missing? Basically, is there a way in c# for it to hit that function like in VB without adding the line above in the source page?
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Aug 9, 2010
I have combobox and I was wondering how do I call one of its events, for example,MyComboBox5_SelectedIndexChanged. I have no idea what to put in for its sender and e arguments.In other words; how do I complete the following statement
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Jan 7, 2010
I have created a form in a project with some controls on it and put code behind those controls so they all work as I want them to. I now decide I want to group those controls within, say, a Groupbox to visually isolate them from the rest of the form.
So I select all the controls, delete them, create the new Groupbox, paste the deleted controls back and all looks OK. However, all the controls have now become "detached" from their associated events. The events still exist in code and the controls still retain all their properties but the controls no longer function.
Is there a way to "refresh" the project so that the controls are re-attached to their events or do I have to go through each control and do it manually?
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Apr 18, 2011
I want to use the following snippit.
For Each x As Control In Me.Controls
If TypeOf x Is CustomControl Then
SomeAction( x.CustomEventofCustomControl)
End If
Next
The problem here is that not all controls have event CustomEventofCustomControl, so the complier shrieks. How do I get around this.
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Jun 9, 2009
is there a section on how to add controls, Ie like in fire fox Tools/Options
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Oct 1, 2011
I'm developing a website in visual studio 2008 using (asp.net/vb)I have to allow registered users to build pages and add controls that are already defined by the same userMy problem is how to build this page dynamically?In other words, I'd like to make like any CMS (e.g. Joomla). CMSs allow us to make new pages and add our controls then save them..
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Feb 10, 2011
How to define handler events for dynamic controls.
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Jun 16, 2009
I have a form with 2 contols that I with to connect by drawing a "wire" on the screen. It goes like this: you mouse down on the first control then move the mouse while holding the mouse button down. When the mouse is over the 2nd control the mouse button is released and the controls are wired.
So I am playing with mouseup, down, move, etc. When the mouse is over the first control I get mouse moves from that control, but when it moves off the events stop, and I get no events from the form even though the mouse is there.
Is there a way to do this? I have seen it done in a Java app. I could brute force it and just draw a box on the form instead of a control, but that sounds like a step back.
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Feb 12, 2012
Handling Events For An Array Of Controls
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Feb 27, 2012
I made a custom control for my form. It's basically a custom button I made using a label.The only problem is, when I apply a myButton_Click event to the control in my main form, it will only be triggered if the control itself is clicked. The label takes up the entire form (it's docked inside it). The click event isn't triggered when the control (virtually the label) is clicked. You must click behind the label (the form's background) for the event to be triggered. How can I pass the myButton_Click event to the label so it is triggered when the label is clicked? I hope I'm making sense.
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Mar 5, 2010
Im curently writing an app for windows mobile (so its using the compact .net framework)It has a loop which finds out how many images are in a folder, makes a picturebox for each one, then sets the .image property to the appropriate image. It also adds the name, size, location etc.What I dont know how to do is add a mouseclick event to it?I probably would have a subroutine already written in the code which could be used, or would it have to be a new one made for each picturebox?
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Jun 22, 2009
I have a number of user control dynamically added to a page, and user interaction with these dynamically added user controls need to be handled by the control's parent. Is this what is referred to as "event bubbling"?How do I do that in VB?
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Jan 5, 2011
I've a control that throws an exception in one of its events and I need to catch this exception. How can I do this?
Example:
Private Sub AxNtlxImage_Reason(ByVal sender As Object, ByVal e As AxNTLXIMAGELib._DNtlxImageEvents_ReasonEvent) Handles AxNtlxImage.Reason
' TODO: Deal with this reason message
Throw New ArgumentException(e.sText)
End Sub
I want to catch this exception from another procedure when it happens.
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Apr 22, 2009
I like to build objects that contain properties and also functions / subs to do work. I dont have a lot of other programmers around me to answer this question so I thought id ask. If my goal is to make a function or even sub part of a class blue print is it better to do it by making a seperate class for the function, and then construct a new copy of the classFunction as a property of the parent class or is it better to simply put the function in the parent class.
[code]...
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