I would like to know please how to check whether a string exists or not in a html code. I'm executing a for loop. Each time it checks a different url, so I want to be able to check each time if for example "<img" exists .
P.S: What's the difference between using
webrowser1.navigate
AND
dim request webrequest
request = WebRequest.Create
etc...
How do I check if an HTML element exists? This element will only "show" on a certain event. ex: numbers in a non-number textbox or something. I tried
If WebBrowser1.Document.GetElementsByName("ElementName")
But that won't work, because the element "is in" the HTML, even though the page doesn't show it yet.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
View 2 RepliesI want my program to check if 10 different files or folders exist. However I do not want it to spend more than about 10 seconds checking. Is there a way to reduce the timeout to 10 seconds?
View 9 RepliesI have some difficulties concerning threading [code]
Code:
1- Dim str As String
2- Dim x As New myClass
3- str = x.doSomething()
4- x.closeSomething()
I've included line numbers so I can just refer the lines by their numbers. My problem is, when the program executes, line 4 seems to be executed earlier than I want it to. It gets executed while ThreadX is still running in line 3. How can I force the program to wait until ThreadX has finished executing, before it executes line 4?
I have (in Excel) code similar to this:And then from there it will call the corresponding module and pass varStar to each module and run the code. The issue I have is that sometimes (like right now) it is a new year, or a new month and varStar may not exist in the specific workbook. How can I code it to, if varStar doesn't exist just skip it and keep going. I tried On Error Resume Next, and On Error GoTo 0. But that wasn't 100% efficient.
View 2 RepliesI need to check if a webpage exists if it does whether a certain string exists anywhere on the page. Preferably I'd like to do this without a webbrowser control, so that images don't have to be downloaded and it doesn't have to be rendered.
View 1 RepliesIm trying to create an app that can Compile and run vb.net code while running. Like I will have a multiline textbox and a button that runs the code. The code should run as if it Were to be in a normal Sub. I've heard of system.reflection but all the examples microsoft provided have failed.
View 4 RepliesI want to know if a string exists in the list of array ignoring case sensitivity
I have the following code working for my requirement, but its checking case sensitivity. How can use it ignoring case sensitivity...?
Dim SrtList() As String = {"abc","qwe","zxc"}
Dim chkStr As String = "abc"
If strList.contains(chkStr) Then
[Code]....
Starting from my understanding about Background worker control, I understands that the background worker runs the code in its "DoWork" method in a seperate thread, while ProgressChanged and RunWorkerCompleted events are executed on the main thread.In my senerio, I report the progress and under an specail condition my application displays a message box to the user in "ProgressChanged" method using MessageBox.Show(). and in "Run Worker Completed" event the application finalize some work. There the sequence is important, suppose that the message is of Yes or No type and finalization depends on it. Now when i run my application, the background worker triggers "ProgressChanged", but as soon as backgroundWorker's cancelAsync() is called the program leaves the current "ProgressChanged" method and executes "RunWorkerCompleted" code first.How can i make sure that the "Run Worker Completed" code executes only after the completion of ProgressChanged method.
View 9 RepliesSo I'm kind of new to VB and am just playing around with a little project, I currently need a loop that is constantly checking the systems clock to see if it's equal to a certain time.
While Not myTime.Hour = 24
If TimeOfDay = newTime Then
nfi.ShowBalloonTip(15)
[code].....
I am using a for next loop to scrape through some html code. I am testing elements for a certain string, and when it hits that, I need to get the string that resides 2 elements earlier.When going through a for...next loop (I know you can loop completely backwards with step -1), is there a way to 'go back' 2 loops?
Ex)for each'lets say we are 5 loops in and our if returns true'can i go back to loop 3, perform an action, then return to loop 5 and continue the real loops?
I have a BackgroundWorker and the DoWork event, calls a function called "JustMe", it executes a loop to make visible all the controls on a panel, but does not work vb.net
Private Function JustMe As Boolean For Each ctr As Control In Panel1.Controls ctr.Visible = True Next Return True End Function Private Sub BackgroundWorker1_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
JustMe()
End Sub
I am waiting for a confirmation email to arrive within the web browser I am using I do not need to click any buttons to open this mail I just need some help figuring out how I can check whether it has arrived or not I already have the code to find the link and navigate to it (I had to navigate rather then invoke due to it trying to open in a new window outside of web browser and out of my control)
How can I keep checking for my specified element and when found carry out the rest of my code or is there another way I should be doing this the code I am using to find the verification link and navigate to it is as follows
[Code]...
I really am desperate for help on this one I have been reading about loops but cannot seem to find any example which I can use and change to my needs I have done so well in learning up until now and I have really hit a brick wall for something which seems so simple
I am writing the code as on if statement that if the html class has strings called "<a id=""rowTitle1""(.*?)</a>" then do something. In what property that come after pattern that I could check the string whether if it valid or not??
View 13 RepliesIs it possible to find a particular string present in a string array?Example
Dim myString as stringmyString = "abc"
Dim myStringArray() As String = {"rg", "grg", "grg", "dgdg"}
Is there any way to find myString is member of myStringArray, without writing any loop?
We can reproduce it to the point it happens whenever we click Tab, but short of putting a break point at the beginning of every method in the project to find out what is executing.
Is there a way to set visual studio to break whenever anything executes?
I need to be able to make my animatedBarPictureBox display BEFORE my code executes. With my current code it only displays after all the Call statements execute, even tho I have placed it before the Call statements. Do I need some kind of repaint command to display this picture before it updates my bookmarks?[code]...
View 2 RepliesHow can i test that the code executes in debug mode.
Here is what i would like to do in pseudocode
if not debugMode then
Do something()
[code].....
Is there a more efficient way of doing this than adding &""""& for every double quotation mark in the html code when building the string? I need to store the HTML code as a string. I am finding "[tablerow]" within an existing document with StreamReader and want to replace it with my string value (html code) when writing it back using stringwriter.
View 5 RepliesHow to strip html code from a string? I know how to do this in Visual Basic 6 using Regular Expressions 5.5 as a reference, but since I switched to VB.NET 2008 today
View 1 Repliesy question is I have a program that is used to add inputs to an array when the OK button is clicked. My problem is that the after the first click of the OK button the Do while loop does not execute again for a 2nd click.lling out my hair. Here is the code.
Public Class InputValue
Public Shared InputArray(0 To 9) As Integer
[code].....
Just trying to run a basic program where the user is prompted to enter five names, one at a time. I'm prompted one time. After entering one name I get the following error "Unhandled exception: System.NullReferenceException:Object reference not set to an instance of an object"
Here's the
Module Module1
Sub Main()
Dim SortedList
For SortedList = 1 To 5
[code]....
how to strip html code from a string? I know how to do this in Visual Basic 6 using Regular Expressions 5.5 as a reference, but since I switched to VB.NET 2008 today, I am quite unaware on how to do the same.
View 2 RepliesThis may sound really stupid but I have to ask cause I'm not finding this answer anywhere.I have an application where the user will need to sign up for a new user account on the website [URL]..However when I am using Firefox's plug-in Firebug to view html I am getting something totally different than when I just right click on the site and view the page source.
What I am trying to do is to get the captcha from the website and display it in a picturebox on the application so the user can view the captcha, solve the captcha and then the app post is back to the service for a response.
Here is the source that I am getting using Firefox's Firebug to inspect the element:
<td>
<input type="hidden" value="Oo3Jo1I8bgzK68agMqo3s79ZZib2OkbK" name="iden">
<img class="capimage" src="/captcha/Oo3Jo1I8bgzK68agMqo3s79ZZib2OkbK.png" alt="i wonder if these things even work">
</td>
[Code]...
Why would the two be showing me two different versions of the HTML?
And how would you be able to grab that source to view in a picturebox using webclient?
I made a code that starts the Disk Check on boot time it works fine on Windows Vista and Windows Xp but on windows 7 I checked the path at were windows 7 stores BootExecute and it is on the same path. Maybe the system is blocking it. Or do i have to change the code.
Here is the code:
Dim rk As Microsoft.Win32.RegistryKey
rk = My.Computer.Registry.LocalMachine.OpenSubKey("SYSTEMCurrentControlSetControlSession Manager", True)
rk.SetValue("BootExecute", "autocheck autochk /p ??" & Drive) 'Turn ON
The Drive String just gets the name of the drive for example C: or D:
I had more problems coding for a windows 7 machine then Vista.
I have a application that uses data from a database to create a email signature for a user.When you create a template you can insert optional fields. Like this
View 5 RepliesI can step through a routine that creates sql tables and the process is successful. However when I simply allow this same routine to run it does not.[code]...
View 1 RepliesI need some code that goes through each item in a listbox and executes a for next loop for each item
View 9 RepliesI'm converting a project from .net 1.1 to 3.5, and everywhere the following is used in the markup:
Design_Time_Lock: true
e.g.
<asp:linkbutton id="lbRun" style="Z-INDEX: 111; Design_Time_Lock: True" runat="server">Run</asp:linkbutton>
[Code]....
I've read up about the Design_Time_Lock attribute, and I can see when it will and won't be generated. However I don't really understand the point of it. And- more importantly- can all instances of it be safely removed throughout the code?