I'm wanting to explore the options of having external hardware plugged into a USB port or Serial Port so my computer can communitcate with buttons or visa versa.
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How and where can I start on this?
Also are Serial Ports on there way out and should I focus on USB?
This is the code I'm using now to start another EXE from my application:
Process.Start(My.Computer.FileSystem.SpecialDirectories.Temp & "MyDownloadedApp.exe")
This EXE has a command line option however - /check. How can I change this so that it runs with the /check command?
How can I programmatically detect whether a webcam device is plugged in to the PC or not, return 'True' or 'False.
View 1 RepliesIm trying to make a program that locates a USB when plugged in and then copy them to a certain directory and then stop the USB from being accessed until you untick the checkbox that controls that directory and sorry I don't have any code
View 5 RepliesI am in need of a form that shows various options, exactly like the Options in Visual Studio. Since there are so many options I too want them categorized, with a TreeView to the left taking care of showing the right category.The usual 'easy' approach here would be to just place a TreeView control on the form, add some nodes, and give those nodes a tag or key that corresponds to a panel or UserControl with the options for that category.Since there will be a lot of options however, this is not really feasible design-wise; the form would be cluttered with possibly 50 panels, all of which I would need to select and bring to front from time to time to add controls to them that represent the options.
So I decided to create a custom control that does exactly that. The control is very similar to my Wizard usercontrol, users can add OptionsPanels at design time, which inherit Panel and simply represent one panel of options. When they do, the panel is added to a container panel, and at the same time a TreeNode is added to a TreeView. The control uses a custom ControlDesigner to handle design-time clicks in the Treeview, selecting a different node would select and bring to front the corresponding panel, allowing the user to add the controls he wants.
Due to the design time support the problem of having 50 panels is no longer present, only one panel will be visible at a time and selecting the right panel is as simple as selecting the corresponding TreeNode, just as during run-time. Anyway, I got all this working, but only for a single 'level' of categories. As you can see in the Visual Studio options, there can be multiple levels of categories. For example, the Environment node has a bunch of children, where each child represents one 'options panel'. There can even be deeper nesting, see the Text Editor node for example.Let me begin by drawing out the basics of how my control works so far.
The main control is an OptionsView control, which contains a SplitContainer with a TreeView to the left and a OptionsPanelContainer to the right. The OptionsPanelContainer is merely a Panel to which only OptionsPanel controls can be added, and which raises events when this happens, as well as when OptionsPanels are removed from it. An OptionsPanel also inherits Panel, and these are the actual panels the users will see in the control, one for each option category.For now, each OptionsPanel has exactly one corresponding TreeNode (and vice versa). In the Visual Studio options, each 'parent' category usually has a 'General' node as the first child, and the parent and this General node show the same option panel, but I am ignoring that for the moment.
The OptionsView control has a property Panels that returns the ControlCollection (Controls property) of the OptionsPanelContainer (in other words: it returns a collection of OptionsPanels that are in this container panel).
vb.net
<Editor(GetType(Designers.OptionsPanelCollectionEditor), GetType(UITypeEditor))> _ <DesignerSerializationVisibility(DesignerSerializationVisibility.Content)> _ Public ReadOnly Property Panels As Control.ControlCollection Get Return Me.PanelContainer.Controls End Get End Property
A custom CollectionEditor for this property takes care of the designer: even though the property type is ControlCollection, the CollectionEditor knows it should create instances of the OptionsPanel control instead of just Controls.When it does this, a corresponding TreeNode is also created and its Tag property is set to the OptionsPanel. Vice versa, the Node property of the OptionsPanel is set to the node. Hence the node and panel both know their corresponding object.
vb.net
Public Class OptionsPanelCollectionEditor Inherits System.ComponentModel.Design.CollectionEditor Public Sub New(type As Type) MyBase.New(type) End Sub Protected Overrides Function CreateCollectionItemType() As System.Type
[code]....
So far so good, this all works fine. I can add Panels via the designer and when I do a new TreeNode appears in the TreeView. I can select this node and the panel becomes visible (comes to the front).Now, I am a little stuck. How do I implement child option panels? And more importantly: how do I let the user add child panels?The most logical choice I think is to let each OptionsPanel have a property (ChildPanels or something) that returns the child OptionsPanels for that panel. Once the user selects an OptionsPanel then, he can look in the property grid to find its ChildPanels property and add child panels to that.
There is a problem though: what would this property return? It must return a ControlCollection of some container (this is, I think, a requirement for the designer features to work, otherwise panels are not added to the Form.Designer.vb file). But there is no container. I cannot add them to the OptionsPanel itself, that would make no sense because the parent OptionsPanel has its own set of controls (the options itself...), there cannot be another (fully docked) Panel on top of those obviously.The container of the main OptionsView then? That is not an option either, its Controls collection holds ALL OptionsPanels, not just the children of the selected panel. I cannot 'select' only the right panels either, that would require me to return a new instance of ControlCollection, it would be impossible to return the actual ControlsCollection that holds merely a small selection of its controls.
This is my code for loading list of plugged in USB devices:
Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
ListBox4.Items.Clear()
For Each Drive As IO.DriveInfo In IO.DriveInfo.GetDrives
[code]....
I would like when a button (lets say buttontest) is pressed it will show all files of a CD (only MP3) into ListBox5, then when buttontest2 is pressed the files in ListBox 6 will be copied from the CD to the selected USB device?
I just want to know the difference between Firefox & Internet Explore when using web browser in vb.net, and here is what i mean. I have a web browser i created it in vb.net.Lets say that i signed in to my email from that web browser. Whenever i open Firefox i don't see myself logged in, but whenever i open Internet Explore i see myself logged in. Why is that?I really hate that, i don't want to see myself logged in on my email when i run Internet Explore. Is there any way that i can avoid this interactions.
View 6 RepliesAs from the title "internet explore/Firefox plug-in", i want to make a plug-in for internet explore or even Firefox. I want this plug-in to be shown on the toolbar.
View 2 RepliesBy using the code below i was able to open the folder and highlight the file that I wanted.The only problem is that I had multiple Explorer.exe's in my task manager.o my question is How can I open a folder and select the file within without Running a new explorer process? or Highlight a file in a folder that is already been opened previously
View 2 RepliesWith the following piece of code
CODE:
The Or keyword is confusing me. So in the above example which variable gets set. Does options = options or does it set RegexOptions.none.
As i'm learning more and more about developing ive just got my head around creating classes and modules, i started wondering about something to do with configuration of applications where deployment is in a more diverse environment say in a company where different branches dont need access to all parts of a program, so i thought id throw the question out there in a basic sense and get some feedback. so i can go off and do some more reading and learning.
So the scenario in my head is like this.
So we have for arguments sake FrmConfig which is the master configuration form, then we have FrmMain which is the root menu our application general user interfaces with. So here based on what options are checked as enabled in FrmConfig effects what controls (like buttons/menu options) are enabled in FrmMain.
how can i make my program feel if any device or usb device plugged into the computer or unplugged.url...
View 3 RepliesWhen I right click a file folder, I get an option called Explore on my pop-up menu. It lets me do this for zipped records also. I want to be able to do this programmatically in my Visual Basic program. How do I explore a file folder and expose its contents in a Listbox. How can I do this for a zipped file? If a folder is zipped and contains a list of files in it, can I go into the file and delete the file without having to unzip the folder. Today, I was able to cut files out of a zipped file and paste the individual files somewhere else. Can I do this programmatically?
View 5 RepliesI wanted to know if it is possible to Zip a folder without any external dll nor any external references - just with native features.I've been able to Zip files with System.IO.Packaging, but it does not include folders and I cannot tell it to Zip the parent folder.I know there are external dll and so, but I'd like to know if it's possible to make it from a native way.
View 1 RepliesI want to learn how to add the menu options that appear when you click your right mouse button.So far I have a normal menu strip control, rich text box control and I have added a ContextMenuStrip control.
I have not got a clue on how to set the properties for the contextmenustrip on the richtextbox control, so when the user clicks the right mouse button the contextmenustrip appears.
Ok lets say I have a combo box with like 3 options in.
Ex:
Combobox
Option 1
Option 2
Option 3
How could I make it so the timer like every 5 seconds it will change from option 1 and be highlighted to option 2? then after so long, to option 3? and loop this process?
I've got a project where each "person's profile" will have many options associated with them, they are broken into groups such as
"Hobbies"
"TV Shows"
"Dinners"
What I was going to do it tick each "group" that applies to each profile and show only the fields that apply to the user.I was going to display them on a panel or a tabpage but How would I show the user what panels need data entered? (there could be 3 or even 4) but would the panels 2-3(or 4) be hidden how would I promt the user to enter data.I don't like the "look and feel" of tabpages.
Well my project will basically involve a database of the sports info of students in my school. It has to work with about 1000 profiles, each containing a personal info record (basically an address book) and a Sports Info record which has some simple information like what sport they do for winter and summer but it also has some records like "Training Info" which will contain a some 10 fields. It'll wind up something like an array of records of records of records.
One of the key points for assessment is that we employ search and sort functionality explicitly using algorithms that have been provided to us. Essentially we'll have to write up our own subs for binary searches and stuff like that.
Now this is group work and I was put in charge of making the database, one thing I'm unsure of is what I should use. Most of the other groups are using .txt files to store their databases as they've been told that these are easier than Access files. However their databases don't appear to be quite as complex as the one my group's planning. Another random titbit of info I heard was that using our own search functions to search an Access file would not only be slower than using the inbuilt ones (another random something gleaned from conversation) [does it have inbuilt search functions?? I heard somewhere else it didn't] but also that it'd be slower than searching a .txt file with a similar sub.
I'm not sure of the veracity of those statements, however I still want to ask if you guys have any recommendations for what I should use to make the database with. The only ones I know of are CSV text files and MS Access, I'd be very grateful if you could point me in the of a good "thing" to use with VB.net for this kind of project.
I want to know what are the possible ways to print the data using vb.net?
View 8 RepliesI'm working alot with dates(more specificly the monthcalendar), and for the user's options I have a few features.I'm having some difficulty with letting the user choose their language. For the language I'm using CultureInfo(String), which I have copied and pasted the 2nd and 3rd column from the NLS API into a combobox.Is there anyway I can speed up language option.
View 1 RepliesJust wondering if it possible to save a form. I have a form with dgv and various other user selected options.
Is there a way to save this form on closing so that it will open again exactly as it was closed?
i want to be able to load form2 by pressing the right mouse button.
here's what i have so far:
Private Sub Form1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
If vbKeyRButton = True Then
[Code].....
e.KeyCode is giving me an error.
I need to create a program that will allow you to search for data via two different options. When radio button one is selected I need it to change the items in combobox to display dataset1 and when one of them is selected to show the corresponding array value. and two radio buttons to change between either searching by first set of data, or their corresponding values set two. and then display the value thats not being searched. like is you search by name it displayes age and if you search by age it displays name
Dim StatesInfo(,,) As String = New String(,,) {{"Alaska""AK"}, _
{"Alabama", "AL"}, _
{"Arkansas", "AR"}, _
[Code]....
thats all i have i cant find anything on the internet about this that makes sense, also it gives me an error Error1Array initializer has too few dimensions.
Im displaying a msgbox with a question in it. Instead of displaying a msgbox yes/no, is it possible to display a mesgbox with my to options?EG. Open with firefox or IE ?Msgbox options: "Firefox" & "IE" , instead of yes/no ?
View 3 RepliesI created a search and the result is displayed in a grid view. while entering the studentId in the text box all the details of the student is displayed. here its possible to retrieve all the details from the table ie here student table. now i want to filter the search ie only particular records from the table is needed. how can filter the search [Code]
View 1 RepliesI have a GUI class and a database class. I do something like:
Dim db as Database = getDatabaseObject(logTxtBox)
db.executeNonQuery("some update command here")
Within executeNonQuery I connect to the db, execute the command, disconnect and catch the exceptions. logTxtBox is the GUI txt box I want log messages written to. Currently it writes something like:
Private Sub Form1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
If vbKeyRButton = True Then
[code].....
I have created a new user control (ctlMyBox) with a bunch of labels, textboxes, and a picturebox. I learned how to add simple custom properties (strings, integers..etc) to it using the "Public Property..etc" method.
However, as an example, I also want to add a "Theme" property with only three options (Light, Dark, and Colorful). Depending on the theme chosen for the control, the colors of the different labels will change.My current (primitive) solution to this is making the Theme property as a String, like so:
Code:
Private strTheme As String = "Colorful"
Public Property Theme() As String
Get
[code].....
This would require the user to know the exact names of the available themes. What I want is that when someone is coding to change the theme, a list of options would appear after writing ctlMyBox1.Theme = . The user would then select one of the three options, similar to when you select the checked state property of a checkbox for example. Unfortunately I don't know how to do this?
he wants it to install for all users of the PC..do I control that ? or do you just change the install path tonot me the local users when you instal
View 7 RepliesI would like to have threads created and perform selected operations for a menu. Basically there are 3 options and for each option, a thread should go ahead and perform that operation whilst the option is available to select other options if the operation is running and not interactive. I have tried it and after correcting a lot of compiler errors its not running correctly with one thread hanging and not giving the option to select another process.
[Code]...