My friend's IP address is dynamic, this program can not detect the IP dynamic but can detect IP static. How to make this program can detect IP dynamic?
Dim mymailmsg As New MailMessage()
Dim myHost As String = System.Net.Dns.GetHostName
Dim myIPs As System.Net.IPHostEntry = System.Net.Dns.GetHostByName(myHost)
For Each myIP As System.Net.IPAddress In myIPs.AddressList
tempIP = myIP.ToString()
Next
TextBox1.Text = tempIP
i have created a dynamic tabpage and a dynamic tablelayoutpanel inside it then added dynamic textboxes and labels inside the tablelayoutpanel...the thing is , i am having a problem on how to access the value of those textboxes and labels and add them as new columns in the new table(tagpage) in mysql database, i can already create the table in the database but i cant add the new columns in it. heres the code for accessing the values of the labels and textboxes
error: NullReferenceException was unhandled....Object variable or With block variable not set.
sql = "alter table " & tbl_selected(counter) & " add " & frmMain.Controls("TLP_" & SecArrList_sp(counter2)).controls.item(SecArrList_sp(counter2) & "label" & counter).Text & " varchar(100) NULL;"
I would like to bind a DataGridView to a different LINQ query every time (in order to reuse the same form/DGV for different queries), like this:
[Code]....
but the "Qry", and the number of comboboxes, and their field names would change every time.
Basically i have one TabControl with a form and 2 browsers within one form I have ProBlem To call the dynamic browser to navigate with dynamic Textbox.text
[Code]...
I need to represent the following query using LINQ:
DECLARE @PurchasedInventoryItemID Int = 2
DECLARE @PurchasedInventorySectionID Int = 0
DECLARE @PurchasedInventoryItem_PurchasingCategoryID Int = 3
DECLARE @PurchasedInventorySection_PurchasingCategoryID Int = 0
[code]....
Now, I know that a query in .NET doesnt look like this, this is my test in the SQL Design Studio. Naturally VB.NET variables will be used in place of the SQL local variables.My problem is this: All of the conditions after "WHERE" are optional. In that a query might be made that uses one, some, all, or none of the conditions. V.PropertyID and V.Value can also appear any number of times.In VB.NET I can make this query easy enough by simply concatenating strings, and using a loop to append the "V.PropertyID/V.Value" conditions.I can also make a Stored Procedure in MS SQL, which is easy enough.However, I want to accomplish this using LINQ.
Ive managed to dynamically create a form, and dynamically create a timer, but i have not been able to create the timer on the dynamic form. Specifically, i need to be able to have the timer itself create another form with a timer. (I realize that this would create a new form every interval on the timer, that is what i want to do)
1. A way to add the timer to the dynamic form, and maintain the timer sub on my main form.
2. A way to create the whole thing over (dynamic form and timer) through the previous dynamic form and timer.
I was thinking i could use a collection/array to store the forms and timers, but i'm still having trouble figuring out how to add entire forms or timers into a list. (A timer is not considered a control, so i cant use a controlcollection...)
Heres my code;
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim frm As New Form
[Code]....
*EDIT* Btw, my idea was to use i as a variable that increases every time a form is created, then insert the form into the array, with i as the integer. i just need to know how to create a new form with a different name each time. (as with timers)
I have a form that i need to be 100% Dynamic. So it could contain 10 labels maybe 100 who knows.
When you hover over a label there will be a different contextmenustrip to appear for each and every label. So all the contextmenustrips are Dynamic and contain 1 option maybe 2 options even 3 or 4 up to the users settings.
My problem is not creating a handler for when the user clicks on the contextmenustrips options. The problem is knowing which one of the options for that contextmenu was clicked!!
OK, I'm trying to display tooltip text for a dynamic edit box. Well, at least I'm trying to.
On my form, I've got a tool tip control which I've conveniently named ToolTip. My edit box displays OK. But, what I want to do is when the user hovers their mouse over the text box, I want the tool tip to display some text.
I think there are two problems that I'm having. I'm not convinced that I'm properly addressing a dynamic text box name. Ideally, I would want to be able to refer to the text box (but using a dynamic variable that will contain the prefix of the name). To hardcode, I would want to be able to achieve (not in this example but in theory): ABCDEFGt_0300.Text = "hello"
Dim controllerName as string = "ABCDEFG"
Dim t_0300 As New TextBox()
Me.Controls.Add(t_0300)
[Code].....
Below you will find a code sample that I have dummied up to try and demonstrate the issue I am having. However, this is just a dummied up piece of code. The actual program has noting to do with STUDENTS or TEACHERS. Basically, the problem I'm having is trying to have a CLASS within another CLASS each of which contain ARRAYS that need to be dynamic in size. The sample has a CLASS called STUDENTS that can have in theory many students, the number of which are unknown to the CLASS. I need to be able to add STUDENTS to the ARRAY programmatically.
The CLASSROOM Class should also be an Array since each TEACHER will have MANY Students. There will be only 1 Teacher for a given classroom but the SCHOOL will have MANY CLASSROOMS. Again, I need to programmatically add Teachers and Students without having predefined Array sizes. The code I have listed below will NOT work but it demonstrates what I am trying to achieve. I want to be able to reference the CLASS by using something like this ...
School(iTeacherIndex).Student(iStudentIndex) = "Rick Smith"
I feel like I should be able to use ARRAYLIST in both classes but haven't been able to get it to work. I've tried DIM'ing as ARRAY and can't get that to work either.If I can get ARRAYLIST to work then I shouldn't need to worry about expanding the array via UBOUND (if it's even possible).The REAL question is "How do I have a CLASS within a CLASS, each of which has ARRAYS that need to be dynamic in nature so they can be expanded as needed? The size of the array cannot be determined ahead of time".
REMEMBER . . . the actual program has nothing to do with Students and Teachers. This was just my way of demonstrating the issue using an analogy that I thought everyone could understand. The actual Class is much more involved.I have purposely hardcoded some values just to make the sample easier to work with. This is NOT how I normally program but is just here to hopefully make things a little more clear.
Here is the sample code . . .
'***********************************************************************************
'***********************************************************************************
'***********************************************************************************
'Here is the code that is in the form - This obviously doesn't work
Private Sub TeacherTestDemo()
Dim iTeacherIndex As Byte
Dim iStudentIndex As Byte
[code]....
I want to write an application that can detect whether a value in CSS file has changed or not
View 3 RepliesWhy there's no built-in function to detect platform, I need to know I am running on x64 or x86?[code]...
View 4 RepliesMy table gets its information from a Mysql database online. I'm not sure which would be quicker to retrieve the row that contains the information specified.[code]...
View 5 RepliesI have a dataGridView control with a DataGridViewComboBoxColumn column, the question is Which event of the dataGridView I must use to detect when the user change the selected value of a particular DataGridViewComboBoxColumn?
View 1 RepliesHow to detect whether Caps Lock/Num Lock is on/off on a keyboard?
View 2 RepliesI have a text file, about 30mb's in size which gets modified regularly (lines are appended - logfile), but what I would like to do is only read the contents that have been added since the file was last modified.
View 4 RepliesHow can I detect when the WMP has reached the end of the current song? I'm making a media player, and have my songs in a list box. Here is my code for playing a song.
CurrentSong = SongPaths.SelectedItem
WMP.URL = CurrentSong
Label2.Text = "Now Playing: " & Songs.SelectedItem
Songs and SongPaths are both listboxes (SongPaths is hidden) As you might have guess, Songs has the song names in it, and SongPaths has their directory path, the two listboxes are in-sync (Choosing "SongA" in Songs, will select the directory of it in SongPaths)What I need to do, is detect when a song is over, so I can call this code:
i = i + 1
Songs.SelectedIndex = i
'Will select the corresponding item in SongPaths as well.
[code]....
How can i detect how much memory each tab is using
View 4 RepliesWith active i meant for example you are using browser now, so its active when you skip to another window, its not active anymore
View 1 RepliesIf I have a path, eg "C:emp", how can I detect if it is a directory or not?
View 3 RepliesI need to find an easy way to know if the local machine's 'automatically adjust clock for Daylight Saving Time' option is enabled.
View 3 RepliesI guess no need for further description... here's my other post for app that i'm makeing
View 1 Repliesiam need 1 program detect sound on computer if have sound it will alert " currently have sound"if not" currently no sound"
View 2 Repliesso basically most major browsers detect if a site is using ssl if their url is "https" as oppossed to "http" is there a way to detect this and if its using ssl make the url textbox background color be yellow?
View 2 RepliesI had tried to use vb.net2008 to detect a USB mapped to a com port, I basically followed[code]...
View 5 RepliesHow can I detect if my current OS which my program is running under, is Windows Vista?note that there are 2 versions of Vista:Vista and Vista SP1.The build number of Vista SP1 is the same as Windows Server 2008 and that makes the problem!I just want to make sure my OS is vista?
View 2 RepliesAll i wish to do is have some simple code, which can detect when the esc key is pressed, (if possible can you point out where i need to change to set it for an other key).
View 5 RepliesI want to create a windows app which can display a message box whenever i open or close the internet explorer window. As the internet explorer window is opened a messagebox showing that "internet window is now opened" and when it is closed a msgbox showing "ie window is closed".
Kindly help this newbie in writing the code for the same that how can my app made in vb.net detects that ie is opened.
I need to detect a usb device when it is connected to PC.I found next code that is working. But it works only with Mass Storage.Imports System.Management
Public Class Form1
Private WithEvents m_MediaConnectWatcher As ManagementEventWatcher
Public USBDriveName As String
[code].....
I Use the following code to detect if a sprite should be going up or down and the response
If (pos.Y + 100) >= Sprite.BottomY Then
Going_up = True
pos.Y = Sprite.BottomY - 130
End If
[Code]...
but it's pretty terrible. It only works when the sprite starts at the top, and when I want to change the BottomY and TopY, it just starts glitching. What is a better to detect if the sprite should be going up or down?
I am fairly novice hobbyist developer. I am developing a simple calculator app. How can I detect the keystrokes, like when the user presses "1" key on numpad or they "1" key above Q key? I want to call the same subroutine that runs when the user click on the butten control "a "on calculator's main form.
View 9 Replies
