I need to do some clean-up work when using a custom control. For a Form, I would just put the clean-up code in the FormClosing event. However, a custom control does not have that event. What event should I use to remove things from memory when a control's life is about to end?larry higley
View 11 RepliesIM not looking for clink once. Do to its not customizable. What im looking for is something like App Life but that allows custom forms to be used. Or even a tutorial on how to run an update the program. Such as a patch if you will. Does any one know a free program that allows this?
View 3 Replieshow to specify a custom icon for display in the toolbox window when you create your own custom control? Something other than the dreaded "gearbox" icon.
View 2 RepliesI have an ASPX Custom Control which is supposed to load it's properties into an internal collection (defined with PersistenceMode.InnerProperty). Here's the ASPX
<cc:CustomControl runat="server">
<Queries>
<cc:QueryTypeOne ... />
[code]...
I am using custom textboxes and I need to be able to set the Text on txb1 based on the Text of txb2. I have simplied my code to the following:
Public Class customtextbox
Inherits TextBox
Public Event ControlReset()
[Code]....
So, when txb1 looses focus, if its Text is "fried", then it sets off txb2's ProcessAlert function. I had tried to change the value of txb2 Text in ProcessAlert function, but didnt work, so I tried to get it to raise an event instead, which then tries to set the Text property. However I still cant set txb2's Text property. The Text property seems to be set for the duration of the "life" of the Event handler. When I step through the forms controls within the Event handler, the changed Text value is there, but not outside of the Event handler.
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
View 4 RepliesCan a custom control NEW Sub be the only one that executes when Inheriting from an existing control please?I am Inheriting from TabControl and I do not want the base New Sub called, is this possible?In other words, I do not want TabPage1 and TabPage2 to be added.A Form has an Activated Sub which runs once a Form is activated.It is a pity that Microsoft have not got such a method in the baseControl Class otherwise I could have used it within a custom TabControl.
Public Class Form1
Private Sub Form1_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Activated
End Sub
[code]....
We have a ASP.NET web application written in VB.NET where we build content programmatically during the Init event.We make extensive use of user controls, building them on the fly, and I now want to start including SilverLight content.Is there an easy way of embedding a SilverLight application in a control, and then instantiating the whole thing in code, in the same way as you'd programmatically add ordinary ASP.NET controls to a page?The SilverLight component itself works fine when added to a page using the <object> tag but I really want to be able to reuse it elsewhere in code.Since I'm expecting use of SilverLight to increase in our application, and the asp:Silverlight control seems now to be deprecated, I'm looking for an alternative way of wrapping the content.
View 1 RepliesWhat I've done is create a User Control Library (Project) and I've added a single User Control to that project. The control contains a single FlowLayoutPanel, and I created a Property on the control itself to pass the FlowDirection from the Control to its FlowLayoutPanel child.
Build, reference, component appears in the Toolbox and everything works fine, but the property on the control does not appear in the Properties window when I go to edit it at design time.
I'm making a Library type app which needs to scan the whole computer when it is run for the first time. Not again ever. How can I accomplish it?I'll be using SQL database to store data. So, I can easily make a table there and store a flag and check it on first run, but is there any other way? Any native support for this in VB.NET?
View 5 RepliesIn my VB.Net project with framework 2.0, i need to get the current buttery life of laptop or notebook by coding.
It is possible to get the current battery status information?
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Dim x, y As Integer
[code].....
i have used vb to create some simple forms but my latest project has got me beat. The company i work for has just upgraded to Terminal Server 2008 and some of our old programs need administrators rights to open but i do not want to give all 200 users the administrators password, So i wanted to know is there anyway i can create a exe with vb.net that will run a .lnk file (located on all users desktops) as administrator.
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I have two "Game of Life" programs. One uses a list of points that represent the live cells, and the other uses a fixed-size grid. The one using the list of points can zoom in and out, is much more elegant in coding, and has an unlimited size grid. However, it needs to search for points in the list, and the more points in the list, the more time it takes
View 5 RepliesWhat events are hit before form_load in a winforms app? Somewhere before the form_load a file called .ini is created and I can't figure out where it's being created. It's just .ini with no name before the extension.
View 2 RepliesI'm in the middle of porting a VB6 product to VB .NET and .NET Framework 3.5, using Visual Studio 2008. Backward compatibility with customer VB6 legacy code is a requirement.Our VB6 product uses the COM ADODB.Recordset objects extensively both internally and in our API. They port directly to VB.NET if I add an adodb interop reference to my VS 2008 project. My question is how long will Microsoft continue to support ADODB.Recordsets in their languages and operating systems? 2018?I'm trying to make a design decision. Since backward compatibility with VB6 is a requirement, I would prefer to leave them in the .NET code. However, if support will be dropped soon in the near future, then I will use ADO.NET datasets instead, and convert between ADODB.Recordsets and datasets until support is dropped.
View 1 RepliesI've googled and binged my browser to an inch of it's life, but i'm still no nearer to an answer for this, so I'd be grateful for some advice. Mainly with the syntax, but knowing me the whole concept is wrong!I have a textbox. When user enters a string and presses enter, I want the following to happen.
I'm struggling with 3 and 4 and 7
1. Check the string is not more than 13 characters, if so trim the last characters off to make 13
2. Find if the first character of the string is a digit or a letter
3. Convert the string into an array of INT
[Code]...
I'm trying to get the battery life meter in percent, so it will be shown on a progressbar when you're on a portable computer.
View 2 RepliesTrying to find a code to display ' BatteryLifePercent' by itself on the screen of a gps unit running Windows CE Core 5.0. I have absolutely no experience in programming. Just piecing together things I find and slowly learning to make a working program. So if this is possible, could someone post a code for it? Ideally I'd want just the percentage showing on the main page with ability to size font and position somewhere on the screen. [Code]
View 4 RepliesSearching about kernel32.dll and battery functions in it, I came across some interesting
Public BatteryLifeTime As System.UInt32
The full declaration is:
Private Declare Auto Function GetSystemPowerStatus Lib "kernel32.dll" ( _
ByRef lpSystemPowerStatus As SYSTEM_POWER_STATUS) _
As Integer
Private Structure SYSTEM_POWER_STATUS
Public BatteryLifeTime As System.UInt32
What I don't understand is, what measurement do the "BatteryLifeTime As System.UInt32" is in? I mean, is the Battery life Time in seconds or hours.. Or something else, so how can I convert it to something I can use..
We have a serial port which is connected to hundreds of physical devices on the same wire. We have protocols like Modbus and Hart to handle the request and response between the application and devices. The question is related to managing the reference count of the channel. When no device is using the channel, the channel should be closed.
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whats the page life cycle in Ajax call in Asp.net?
View 2 RepliesI want to understand N-tier architecture like when to use and so on.Also I would like to know about user control and custom control.
View 4 RepliesI'm trying to make a little app that displays the battery life of a notebook, and also whether it is charging or not.I've got it displaying the battery percentage and if it is running via the cable or battery alone.My problem is that I have a timer constantly ticking to grab the latest information as to whether it is still chraging, what the battery % is like, however for some reason when it first runs it get's the info but then that's it, it won't refresh the info in real time. I'm confused because the battery can deplete but the program only displays what info it got when it was first ran but if I unplug the power cord or plug it back in it refreshes that info straight away. My code is:
Public Class Form1
Dim psBattery As PowerStatus = SystemInformation.PowerStatus
Dim perFull As Single = psBattery.BatteryLifePercent
Dim GraphicPercent As VariantType
[code]....
The bit I've highlighted in red in my code won't work either, basically I've shaped the two labels to look like a crude battery shape and label2's function is to represent the nobly bit at the top of the battery and I wan't that to change to Lime when the battery is 100%.why it won't refresh the graphical output to the screen?
I am trying to make a listview custom control based on the standard listview control that will allow me to drag a column header outside the standard listview control and drop it on a panel. I plan to use the drop event to determine which column I should group by view on.
View 2 Replies[URL]I tried dragging it but it didn't work. I'm not used to the IDE. Also, how would I make that control at runtime and place it on the form I understand you would do
PHP Code:
Dim myAccount as new TAccount
But how do I display it on the form?
I want to create a custom control in a dll file.
I can make this without a dll file, also inside a normal project, making a class for it and inheriting the desired base control class, compiling the project and the toolbox has the custom control.
But now I want to make it in a separate file, in a dll file. I use vb express 2008.
I start a new class library project, add the reference System.Windows.Forms to the project and add this code (this is only an example):
Inherits System.Windows.Forms.Button
Private Sub New()
Me.Backcolor=Color.Red
End Sub
I compile the project and get the dll file. Then I add this file to the toolbox, but I get the error message: "this control has no components."
I'm trying to play with this: [URL]..I have no clue how to use it though.What i THOUGHT i had to do was open the project and "build" it to produce a .dll or something which i would then add as a reference in my new project. I'm unable to open the solution so i could not test this theory.
View 6 RepliesIm trying to add a custom combobox to the database, the problem is i cant figure out how to do it. This combobox has images in it, i had to find the code to put the images in it cause the .net framework does not support icon's in combobox's. here is the code i found, cant remember where i got it, i think from code project.
Spoiler
Public Class ComboIcon
Inherits ComboBox
[Code].....
I have created a custom class, which contains a panel and a label on it. I added to this class a pcaption property, which holds the label text. This property is browsable and I can change its value.But when I drag the custom control to the form and change the pcaption property, it has no effect. Even the <Defaultvalue> has no effect. Why?
Here is the class code:
Imports System.ComponentModel
Public Class mypanel
Inherits Windows.Forms.Panel
Private panelcaption As String
[code]....
Color values are unimportant, you can change it.