Handle Click- Events Of Dynamically Generated Buttons?
Sep 20, 2010
Am on creation of touch screen UI system.And am generating button for selecting products
Under certain category.
--> array of button creating dynamically And placing in TABPAGE when user selects Tab for category. The button will be created with the name of products, Under the category selected.
{
'the way am creating controls.
mybutton(j) = new button()
mybutton(j).top = 100
}
How can i get the Click event of those buttons-( in the array)....??
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Mar 27, 2012
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim rgen As New Random
[Code].....
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Feb 8, 2010
dynamically creating buttons with images in them and then accessing the on click event for that button. However lets say for example I have three buttons created during run time, button 1, 2 and 3 for simplicities sake. Each button needs to correspond to a value (lets say one, two and three). The problem comes in when i want to, for example, click on dynamically generated button 3 and have it display "three" in a message box. But button 2 might close the program. How can i reference an event when i don't know which button corresponds to which action..
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Mar 11, 2011
To set the scene, I have implemented a drag and drop rearrange in a FlowLayoutPanel (thanks to a few good Tutorials) which worked absolutely fine until the client decided that he needed many Panels each contained in the Tabs of a Tab Control.Ironically the FlowLayoutPanel rearrange still works if the panel is not in the Tab Page. However the moment it is it stops functioning completely.In all honesty its probably a simple issue that I'm missing but I can't seem to find an answer. I'm certain that the issue is in the following block of code, most probably in the following place:If controlcoll(i).Bounds.Contains(mouse.X - flow.Left, mouse.Y - flow.Top) Then Either that or in a property of either of the controls. [code] The Panels, Tabs and Buttons (which are what need to be rearranged) are all dynamically generated.
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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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Jun 20, 2011
I have the user control that is loaded dynamically. When the user save the data by clicking on the Save button, a raise event is passed.
Public Sub RaiseCloseEvent(ByVal sender As Object, ByVal e As System.EventArgs)
RaiseEvent Close(sender, e)
Debug.Print(String.Format("The control {{0}} was closed by {{1}}.", Me.Name, sender.ToString))
End Sub
In the save button I have called the RaiseCloseEvent as follows:
RaiseCloseEvent(sender, e)
Now, how can I close the user control form? Any Idea? I have used VB.Net language.
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Jan 14, 2010
My process is as follows:I access a database table to determine what questions to ask (20-100 questions).Each question is display along with, possibly, a "done" button.My code to do this is as follows:
If datareader("Who_Second").ToString = lbl_Your_Position.Text Then
Dim b1 As New ImageButton
b1.ID = "btn_second" & datareader("QCC_Q_ID").ToString
[code]....
What I need to do for each button is strip out what the "QCC_Q_ID" is for that button and insert information into another table of the DB.My partial code for this is as follows:
Sub btn_done_clicked(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs)
Dim MyDate As Date
Dim QCC_Q_ID, Position As String
[code]....
Two problems:1. My sub is never being called, so I can only assume that my "addhandler" is not working.2. QCC_Q_ID = e.ToString.... That doesn't seem right - is it? What I need to do is get the name of the button (btn_second13) and get just the number out of that (13). Is there any easier way to keep track of that ID?
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Jul 20, 2009
I am trying to put a new face on an old C program. The C program is, of course, unmanaged code, designed smartly to separate the number crunching and the interface, and the interface I'm trying to replace is X windowing. The graphics part is where it gets a little hairy, because the C is going to need to continue to draw in my new interface, based on the data the program produces. Even if I want to duplicate that data in .NET so that the .NET side can handle all of the drawing, the fact remains I'm going to need to operate on the graphics window in some fashion from C.
I gather that handles have a lot to do with the bare Win32 graphic operations. Is such a similar handle provided to, say, a PictureBox element in .NET? And if so, is it the kind of handle I can use in the unmanaged code without an issue?
I have tried and tried and tried to google for the solution for weeks now, and all I come up with are either C++ solutions (using object-oriented GDI+) or some sort of extension to the C language.
Alternatively, is there a way I can have .NET create a handle specifically for this purpose of having C draw it?
To sum it up, I am using Visual Basic .NET 2008 and a C DLL (also compiled in VS2008), so far in the little testing I've done, I've been able to marshal complex structures to and fro, but I am not sure how exactly I'd let C do any drawing on the .NET form, if that was even possible.
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Jul 27, 2009
I am trying to make a routine that will be called everytime the mouse button is clicked. I want it to be called so that the controls event that the mouse is clicked on is triggered.
For example:
You have a button control on your form. Instead of having the Button1_click event
You have a Control_click event. And that Control_Click event will be used for each control on the form.
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Feb 22, 2010
Using VB 2008 Express.
Attaching code to buttons when they're clicked is easy when they're static buttons on the form; just double click the button on the form designer and add code to the event.
I have a series of buttons that are generated in a control array, so they're generated in a class, and in the form there are no buttons until runtime.
So newbie question with a probably simple answer...how do I enter code for the click event for buttons that aren't there until they're instantiated as a class at runtime?
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Jul 2, 2011
I have master page in ASP.NET. I have added two asp controls to master page i.e. _EmpDROPDOWN and _findBUTTON.I have one content page. FindEmployee.aspx which shows result list of employees (Gridview) based on the selection made in _EmpDROPDOWN when _FindBUTTON is clicked on Master Page.I dont know how to read Master Page button click evenet in Content page.How to read master page button click event (VB.NET syntax) in Content Page?
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Mar 15, 2011
I have this code.
Code:
Public Class Form1
Dim NPB As Button
Dim x As Integer
[code]....
As you can see, when I open a program from my menu, a new button will be created with text similar to this, "C:Program ". The button it self will not do anything. How can I create the method at the same time the button it is for is created? Also how can I change the text do that it gives me, for example, CCleaner.exe instead of the whole target path?
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Jun 21, 2009
I made some code:
Dim pictureBoxes(1, 9, 9) As PictureBox
Dim groupBoxes(1) As GroupBox
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[code]...
I don't see controls so I think didn't properly initialized them.. When I look at designer generated code i see:
Friend WithEvents GroupBox1 As System.Windows.Forms.GroupBox
And I can not implement a for loop outside a method to define all of the groupboxes and pictureboxes, doing it one at a time isn't so smart. Now can I modify my code so i can properly initialize all form controls I am trying or I need to take a totaly different approach? Note that I need to use events generated by pictureboxes.
groupBoxes(table) = New GroupBox
With groupBoxes(table)
.Location = New System.Drawing.Point(15, 30) ' TODO
[code]...
Is there any way to assign a value to object in a With/End With code block or I am forced to use the example before?
Note: VS2005, VB 8, .NET 2.0
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Oct 1, 2009
I have a code that dynamically generates some pictureBox-es. What I want to do is to save them so that they will aslo appear the next time the application is opened. Also i don't want to use an external configuration file so that the controls are generated on file-read.
Also I also have some controls that are generated by the designer
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Jan 9, 2012
In my application I'm dynamically generating multiple rows of dropdowns and populating it with the field names based on the selected table value. Based on the field name selected I want to display a tool tip containing the selected field data. how I can use the tool tip for dynamically generated columns.
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Jun 10, 2012
I have dynamically generated some number of buttons. Now i need to manipulate them in such a way that clicking on one button should do something on another button. How to do it? I would prefer the code to be as simple as possible as i am tutoring amateurs.
Private Sub NewButton(ByVal ButtonNumber As Integer)
' set the button properties
btn.Name = "Button" & ButtonNumber
[Code].....
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Jan 1, 2011
My goal is to take some form inputs and prompt the user to download a summary of everything once a certain button is clicked. I have no need for the file once it is downloaded and so I'd like to have a solution where the data is streamed directly to the user. My current solution doesn't even prompt the user for a download. Can anyone point out what I'm doing wrong?[code]....
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Sep 27, 2011
I have a web browser control in my windows form. I am trying to automate some process in a website. During this process, the invoice pdf has been generated dynamically and shown in the web browser control. I need to save that pdf locally. Please note: there is no direct link to download the pdf. I googled a lot past couple of days and haven't found any solution yet.
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Nov 2, 2011
On my main form I have a 9 button grid that I need to fill with a gradient colour so that it represents a "heat map" going from Green (lower left) to Red (upper right). The "heat map" needs to be generated dynamically as - if I use an pregenerated image I have noticed colour variances when working on different screens / projectors as in the app there are other dynamically generated graphics & the two sets of colours need to match.So to achieve this - on my main form I have a PictureBox that I fill with the gradient colour.On top of the PictureBox I place my grid of 9 buttons.I then hide each button & take a screenshot of what is behind it & that then becomes the background image for the button. The button is then made visible.All works fine when I am testing in on a simple form The issue is that this arrangement needs to be placed on a tab control & I'm having difficulty replicating what I could do successfully on the simple form.....
Code for the colour gradient :-
Dim A As Integer
Dim B As Integer
Dim C As Integer
Dim D As Integer
[code]...
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Sep 23, 2010
The code below loads 4 Tab Pages at runtime to a TabControl. If I have UserControls in my toolbox, I can't just drag and drop the user control onto these TabPages because they don't exist yet! How do I accomplish this dynamic loading of UserControls onto the Tab Pages as they are created?
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
[code]....
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Jun 27, 2012
I have created a Stored Procedure in SQL which produces a pivot table. I've successfully created a GridView in ASP.NET to display this data.
However, some of my column headings are dynamically generated from the data (AutoGenerateColumns=True), and those column headings are just dates, so they will look different almost every time the table is generated.
This all works fine, except that the date format of the column headings is wrong. I know I could change the way SQL produces the dates in its output, but I don't want to do it that way. I want to control it from the web page.
I didn't think this would be difficult - I thought I could just do something along the lines of finding the cells in the header row and changing the datastringformat. The problem is that whether I put my code in the GridView's DataBound or RowDataBound event, the cells in the header row seem to be empty, so I can't reformat them. It's as if the headers get populate some time AFTER the DataBound event, but I don't know when or how to trap it.
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Jun 11, 2012
I have used the following code to generate buttons dynamically. I want to know how to code in such a way that if i click one button, there should be some change done to some other button in the same form. Since all the buttons are generated in the loop, i do not know how to call one button elsewhere in the code.
Private Sub random2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim i As Integer
[Code].....
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Apr 11, 2011
I created a custom class for a custom object. I instantiate like so[code]...
Now, I have two problems. First, right now this is just overwriting the same object properties, again, and again. I need to somehow dynamically name the object. Then, I need to place these objects in an array so I can iterate through them...
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Jul 28, 2010
I'm coding an ASP.NET page, with VB code behind. When the user clicks a button on the page, I send them an email with information and instructions. Rather than sending a plain text email, I send a nice, pretty, HTML-formatted one. Right now, I'm doing this in a way that I KNOW will be difficult to maintain. That is, I'm straight up writing out all of the html. [code]...
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Jul 30, 2011
I am adding a series of RadioButtons to a GroupBox programatically. By default they are all placed on top of each other. So I use a bit of math to position them all nicely and then resize the GroupBox.
However I notice that the GroupBox has an AutoSize property, but it doesn't seem to be resizing as controls are added.
Is there a better way to position my radio buttons than to specify each one programatically? I mean, can't this stuff be handled automatically by the framework?
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Mar 18, 2009
I'm creating a PDF file on the fly using ITextSharp and ASP.NET 1.1. My process is as follows -
Create file on server Redirect browser to newly created PDF file so it is displayed to user
What I'd like to do is delete the PDF from the server as soon it is displayed in the users browser. The PDF file is large so it is not an option to hold it in memory, an initial write to the server is required. I'm currently using a solution that periodically polls for files then deletes them, but I'd prefer a solution that deletes the file immediately after it has been downloaded to the client machine. Is there a way to do this?
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May 28, 2009
I want to create a form where the user can upload as many images as they like with the input areas being dynamically generated. I can't use Ajax for this I need to use ASP.NET controls and the images are being written to a database. Any ASP.NET control that can accomplish this? Here is my code for the dynamic form, its Javascript and its not passing the "PictureSmallLink" value back...and their in lies my problem.
<input id="PictureLinkSmall" name="PictureLinkSmall" type="file" runat="server" size="60" />
<input id="AddFile" type="button" value="Add file" onclick="addFileUploadBox()" />
<!--<p><asp:Button ID="btnSubmit" runat="server" Text="Upload Now" onclick="btnSubmit_Click" /></p>-->
<span id="Span1" runat="server" />
<script type="text/javascript">
function addFileUploadBox() {
[Code] .....
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Jul 13, 2011
I have an asp.net web forms application. In this application, students upload assignments and submit a survey along with it. For the survey, I read values from DB and dynamically generate ASP.NET Controls like radiobuttonlist, checkboxlist, textbox on the form during gridview's RowDataBound Event. I cannot do it in Page_Init method because I create only if a user click on a specific assignment which requires a survey to be submitted.
When I submit the survey form, the survey values are not saved into database. During debugging I figured it out that the values are not available in the codebehind page. The radiobuttonlist.selectedvalue returns and I get following error[code]....
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Feb 25, 2012
I'm trying to produce a repeater showing amounts of money taken by various payment types into a table.Payment types available come from a global settings file as an array, I am creating a dataTable by looping this list and extracting sales reports (there might be a more efficient way than this loop, but this is not my concern at the minute).My question: How do I bind this to a repeater and display it when I dont necessarily know the table column namesI've tried various methods to give the table a header row and give the columns numerical names from a for > next loop, but am either getting no results, orystem.Data.DataRowView' does not contain a property with the name '7'. < or whatever numberThis is where I currently am:
EDIT: JUST REALISED MY CODE WAS AWFUL, SO UPDATED:
Dim paymentTable As New DataTable("paymentTable")
For j = 0 To UBound(paymentTypes)
[code]....
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Dec 16, 2011
I am adding a grid of buttons to a form at run-time, and all of then use the same Handler.My question is : Is there any way I canadd the TextBox at run-time ?I know how to but without it on the form, the IDE isn't very happy about the "MyClick" Sub - TextBox1 is not declared......
' some logic here to make nice rows and Columns of buttons
' with different .Text and .Name
Me.Controls.Add(btn)
[code]....
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