I'm looking for in depth information about Visual Basic. For example, Scoping and binding behaviors, subprogram and package facilities, etc.
Edit:I'm looking for information such as: VB uses lexical or dynamic scoping; binding for X happens at compile time/load time/runtime and is static or dynamic. Basically a more in depth look at the characteristics of the language.
I would like to have some explaination about the characteristics of a primary key in the table of such database. This is for vb 2008 express edition,since im new to this language,if this is true, as far as i understand about the characteristic in setting the primary key on each field for true.My question is if you are doing an updates/edit records in your table using the DataContext,if you setup the primary key for true of one of your field in the table it would edit all records in one datarow but if you put the primary key for true in all fields except one of them,all the records in the data column of that field which primary key is false could be edited.Basically its impossible to edit all records in the datarow and all the records in the datacolumn of the table in such one event. Is there any further explaination about the characteristics of primary key in the table?
View 1 RepliesI would like to have some explaination about the characteristics of a primary key in the table of such database.This is for vb 2008 express edition,since im new to this language,if this is true, as far as i understand about the characteristic in setting the primary key on each field for true.My question is if you are doing an updates/edit records in your table using the DataContext,if you setup the primary key for true of one of your field in the table it would edit all records in one datarow but if you put the primary key for true in all fields except one of them,all the records in the data column of that field which primary key is false could be edited.Basically its impossible to edit all records in the datarow and all the records in the datacolumn of the table in such one event.Is there any further explanation about the characteristics of primary key in the table?
View 1 RepliesI wonder if it is possible to find a specific row and specific columns in data base file (Access) . You see , I am using a DataGridView control to show only SOME of the columns (fields) of a table from an Access file . For example , lets say that in the DataGridView control I only show the following fields :Field1 , Field2 and Field3 .Now , when the user selects an entry in the DataGridView control , I want to insert the text from Field4 into a text box on the form .
The problem , however , is that I don't know how to get the specific row in the data base file and also I don't know how to get the text in column (field) Field4 of that row .One thing that might be important is that the index of the row in the data base file is not necessarily the same with the index of the current row in the DataGridView control . This is because in the DataGridView control the rows are order by the contents in the ID Field .ol .
i am a beginner in vb8 i have a text file named alarm.txt,sample alarm.txt file is shown below
can someone help me to read the alarm.txt file and extract data.for eg
[Code]...
I have search system that works like charm: 1> Searches specific folder for text files which contain specific word 2> Puts those text file names and/or paths to listbox However i want it to put (instead of InputStr) the specific line where word is found in text file to listbox.
[Code]...
The below picture is generated by the following code:
Public Class Form1
Private Sub Form1_Paint(ByVal sender As Object , ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me .Paint
[Code]....
What I want to do is when I click on each grid on the form (Touch Screen), a tooltip of some stored information about the grid appears on screen. For example, if I click my mouse on square 6,8 then some stored information such as grid number, grid name, level...etc appears on the tooltip on the screen.
I am trying to find a specific file in a specific directory and then i need to get the full path of the file.Is this possible i cant find any help topics about a specific file.
View 5 RepliesSo im trying to get evything that has ends with .iso into a list box, tryed a couple of things but not getting anywhere as yeat
Here is code.
Dim Locate As String = Application.StartupPath & "\Games\"
ListBox1.Items.Add(Locate.EndsWith("*.iso"))
The Locate String is there because thats the location where the iso files are but the application is in the root of the drive. The ListBox1 command is fairly easy to understand
Here's my problem i am trying to extract data from a forum
Now what i want is to remove a specific word from only a specific line
So here's a example
[quote=randombla13] I am the king of the world bla bla
[img]http//google.com/img.jpg[img]
[quote]This line should not be removed[quote]
[quote]
Now as you can see these are the codes you may have seen in many forums
Now want i want .Net to do is filter the the content in a textbox
And remove only the lines marked with red "[quote=randombla13]" from the first line
And the Extra "[quote]" from the end line
As you can see in the example the content has two "Quotes" so i jest want to remove only one from the first line and last line of the content
And note "[quote=randombla13]" the length after the = is Unknown it maybe of 6 characters or less or more
I was wondering how I would replace a specific character at a specific position.[code]...
View 7 RepliesStrange story... I downloaded VMWare but it has since advised of an available update. I downloaded the update and when I click to install it, a window comes up with VB Code from a project I created a while back in a completely separate folder from this install file. I then tried downloading the trial of VMWare Workstation and when running the installer it shows the same thing. I don't know of anyway to contact VMWare support since I don't pay for any services or products and all there is available is a FAQ type section. Of course this problem would not be in there, nor can I find any such related issue online. his is VMWare specific or perhaps the type of install specific. I have no other issues with any other app installations other than with VMWare installations.
View 2 RepliesTo refresh or invalidate only a region of the form.sometimes I will need refresh all the form, but in some situations only specific regions of the form..I saw some samples on the Microsft site, but I don't understood.I use VB .net 2008
View 3 Repliesi'm trying to make a program that searches for a specific file in a specific file, so when the program loads it "writes" in checked list box the names of the drives installed to the computer, but what i want to do is: when the user checks the box, i want it to search for the file in that drive, but i don't know how to do it...
I'm using:
Imports System.IO
Imports System.Collections.ObjectModel
Public Class Form1
[Code].....
how to make it search in the other drives using the checked listbox?
I am getting ready to release a .NET 2003 application, and this application has a file type associated with it.During the installation I register the extension to be associated with my application, and everything is working fine.My question has to do with the icons. I want a specific icon for the exe, and also a specific icon for the files associated with my app.i want to have both icons in the exe file.I guess my question would be, how do i embed 2 different icons into an exe, so that if you selected that exe as an icon source, windows would see the different icons in it (as seperate icons)I know I can embed them as a resource, but windows only sees the main icon.To give you an example, of what I am trying to do, winamp, the mp3 player program, has several icons in its exe (see picture)(the visual studio IDE exe - devenv.exe - also has more than 1 icon in it)
View 18 Repliesso i want to have a msgbox pop up and whenever the user clicks ok he/she will b redirected to the homepage.I want to do this in VB. So far i have [code] If response = MsgBoxResult.Ok Then [/code] wat should i put after then? like something that will allow me to enter a url
View 4 RepliesI'm trying to convert the following C# code to VB. The reults from online conversion pages I have tried doesn't make sense to me and VS2010 marks them as flawed. My limited C# knowledge about events isn't enough to solve this one.
[Code]...
Is it possible to identify which row you want to add a new row to in a DataGridView. Is there a location property that one can use with the Add Method? Or do you simply have to loop through the DGV, test for logic and then add th row?
View 3 RepliesI have a stand alone application that I am writing that has a button to luach a website I am developing.The button checks to see if the website is already open.If it is, the application should set focus to the website in IE8.I am having, is if the website is already open in a tab in a IE8 window, but the focus is on another tab (e.g.url..I can set the focus to the entire IE8 window using the HWND, but not the tab I intend to have focus.Even though they are multiple tabs, they all have the same HWND because they are in the same window.
View 2 RepliesI'm working on a program but i'm having a small problem. I need to search the IE cache for multiple URL's that contain a specific string. [code]....
View 2 RepliesHow to get the value on a specific row by searching?i.e., I have a gridview:
A B C
---------
1 2 3
[code].....
How can I get time for specific ?[code]...
View 9 RepliesI am currently developing a small system to capture image/screen (likely Printscreen function). What I intend to do is using a hot key such as F9 (assume system is running from the system tray) to capture the image/screen. Having said that, I am using the F9 function to ensure that The fully interface of the system will be shown in front of the user (only run from the system tray) however if user want to view it, they can do so by clicking the small icon of the program from the system tray.
I found some info using these codes but not sure how it works.
Private Declare Function RegisterHotKey Lib "user32" (ByVal hwnd As IntPtr, _
ByVal id As Integer, ByVal fsModifiers As Integer, ByVal vk As Integer) _
As Integer
[Code].....
I have several combo controls that need to be populated with a specific ID and name. I want the user to choose the name and have the ID in the background. Later when the data is exported from the database the specific ID's are exported and not the names.
I see that I can create the items in the combobox rather easily using their names. However, how can I associate the ID number for each of the items. Private Sub frmReceipts_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
' Add receipt types to combo box
cboReceipt.Items.Add("Monetary")
cboReceipt.Items.Add("Inkind")
cboReceipt.Items.Add("NSF")
End Sub
I thought it would be better to have a seperate table with the different receipt types and then somehow connect/link the contents of this new table to the combo box on this form. However, I am at a loss on how to do this.
actually i need to execute this query for a specific row can u tell me where i am making mistake.
im i = DataGridView1.CurrentRow.Index
Txt_Serial_Number.Text = DataGridView1.Item(0, i).Value
If Not IsDBNull(ds1) Then
[code]....
At the moment, my current application is targeted for the Vista OS.I was wondering if there is a way to maybe use conditional logic or something else to target XP.
The tasks my program will do are depend ant on the file structure of the OS. As you all know, the file structure in Vista is different in XP.I thought that maybe I could do something like, If XP Then... Else If Vista Then..
I am trying to get a text file to be overwritten since it's already there. The thing is, that I'm not trying to overwrite a specific file. In fact, EVERYTHING must have the right name, or my project won't turn out right: http:[url]....However I don't have that problem any more because I solved it. Now my problem is much more simple. Again, I'm NOT trying to overwrite one specific file, so I couldn't say something like,
HTML
RmDir("C:KQQuestion1")
I need a way to overwrite any file name.
I have a form and i want to print a specific part how do i specify that? I have a printdocument and a printpreview
View 3 RepliesThere is 2 things that i need.
1-Know how to send a key to a specific background app(don't loosing the focus of the actual window). Is there a function or API to do that?
2-Warcraft III have a protection tool and its almost impossible to use any function or API to interact with it.
I want to find out the X and Y position of a point which is halfway between a point and another point, in VB.net. Since there is no "direction" property (which would make this much easier...), I have no idea how to do this.
C# code is acceptable as well, though I would prefer vb as it wouldn't require a port.
