Check If Element(byid) Exists On Page?

Apr 3, 2009

My current code:

If webbrowser.document.getElementById("login")

I'm not sure what comes after it.... I've read about and it seems for JS its a simple (or similar to);

{If(document.getelementbyid("login"))
{ if true}
{if false}}

but for VB?

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Check If Element Exists In Webbrowser.document?

Jun 19, 2010

Is there a way to check if an element is in the webbrowser1.document ?

I can click the button fine, IF the element is on the page, but sometimes i get to the end page, where i just have the "back" button, and no forward button.[code]...

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VS 2008 : Check If HTML Element Exists?

Sep 8, 2010

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.

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VS 2010 Check For Element Or Keep Trying Until Element Is Found?

Feb 21, 2012

I have been doing well and also I am a noob I know it and you know it a lot has started making sense and I am evening figuring new things out without using Google but of course I have hit another snag in my program so here goes

I am waiting for an email to arrive (the page automatically refreshes) and then I want to click the link (I do not need to click to open the email or anything like that) I also have the code to click and navigate to the address reason being it was the only way I could figure out how to stop it opening in a new window on IE

So my only problem is I need a way to check every x seconds for the element and then if its there proceed with my code and if its not wait and then check again or however this is done in VB.If this is not the way its done please point me in the right direction the code I am using to find and then navigate to the link is

Dim emailpageelements As HtmlElementCollection = WebBrowser2.Document.GetElementsByTagName("a")
For Each emailver As HtmlElement In emailpageelements
If InStr(emailver.InnerHtml, "https://twitter.com/account/confirm_email/") Then
WebBrowser1.Navigate(emailver.InnerText)

[Code]...

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Link To XML - Determine If An Element Exists In A List?

Apr 27, 2012

I am working with LINQ to XML in VB (although answers in C# are great, too). First off- my code works, so this is not critical. However, I can't help but think that what I'm doing with conditional logic should already be doable using the LINQ query itself. Here's what I've got:

'Get the Description elements in the ResultData section where the value is "Op Code"
Dim opCodes As List(Of XElement) = (From c In xdoc.Descendants("ResultData").Descendants("Description")
Where c.Value = "Op Code"[code].....

Please don't be too critical of my method of locating the sibling nodes- the XML files are produced by a third-party testing device and this is the only generic way to get the values I need. What I'm really looking for here is a better way to handle the If block.

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VS 2008 Determine If Element On Webpage Exists?

May 9, 2009

Just like the title says, I have a webbrowser and I need to determine if the element exists or not before I invoke it.

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Check If A Xml Tag Exists?

Sep 25, 2010

I was wondering if anyone could show me how to check if a tag exists?Here is the code that I am using to get the information from the xml.

Dim XmlFile As New XDocument
XmlFile = XDocument.Load(WorkingDirectory & "ToolsMediaInfoMediaInfo.xml")
Dim Manage = XmlFile...<track>
For Each XmlTag In Manage
If XmlTag.FirstAttribute.Value = "General" Then

[Code]...

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Check If URL Exists?

Jul 10, 2009

This is the standard way of checking if URL exists [code]....

return true; } catch (Exception ex) { return false; } But my problem is that we have to check it for around 100 URL's. It takes more then 2 minutes to check for all as it is trying to get response of all of them. Is there any way that we can check if URL exists without getting complete Response so that total response time is less.

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Asp.net - Page Redirect On Page_Load IF Record Exists?

Nov 13, 2010

I have an default.aspx page that I'm trying to have redirect the user to a different page depending on whether or not their deviceId is stored in the SQL Server database. It should direct the user to the login.aspx if the record for the user is found or to the newdevice.aspx page if there was no record found. I want this to occur on Page_Load but have not been able to figure it out so far.

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Check All The Checkboxes On A Webform (aspx) Page, Which Is Inside A Master Page?

Aug 30, 2009

I am trying to check all the checkboxes on a webform (aspx) page, which is inside a master page,depending on the ID of the checkbox. The checkboxes are created dynamically, so I only know the prefix for finding it. So, I need to find these checkboxes by iterating the controls on the page somehow. It's not working out.

[Code]...

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Asp.net - Check If Referrer Exists?

Jul 25, 2011

In my code, I want to check if a referrer url exists and if the referrer url contains a specific sub string. I know how to check for the sub string:

If( InStr( Request.UrlReferrer.ToString(), "some sub string here" ) > 0 ) Then

But I don't know how to check if a referrer exists or not. No refer exists if the url is entered in manually in the address bar. So I tried this, but this does not work:

If (Not (Request.UrlReferrer.ToString() = "")) And (InStr(Request.UrlReferrer.ToString(), "some sub string here") > 0) Then

how do check if a referrer exists?

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Check If A Column Exists In ADO.net

Sep 13, 2009

I have a windows service which fetches data from various datasources and build a XML file and send it to a webservice. For example first I will get customer details from Oracle Database and build the XML file and then the SQL Server database and build the customer details XML. I am planning to use the same function below to build the customer object irrespective of what the datasource is. But dr("age") column is not available in SQLserver datbase How can I check if a column exists or not.[code]

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Check If A Folder Exists?

Sep 30, 2009

I am trying to check if a folder exist, it doesn't work if the folder name has a space or "_" or "-". .

here is an example of cases that don't work:
"Folder test"
"Folder_test""
"Folder-test"

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Check If FTP Directory Exists?

Jan 29, 2010

I know how to make a new directory on an FTP server, but I wanted to know how I can check if a direcogtry exists, and if it exists display a message?

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Check If Permission Set Exists?

Mar 17, 2010

I am using Caspol.exe to install a custom Permission set and add Code Groups for my .Net 2.0 Windows Application.

I have created a Console Application that uses caspol.exe to add Permission Set and Code Groups. I first install the Permission Set and if I do not get an error, I continue to install the Code Groups

Now sometimes I need to add a new Code Group to the client machine, so I make the changes to the console app and it is executed on the client machine. If the client machine already has the Permission Set installed, it returns an error and stops the further processing.

So, I want to know if I can check whether a custom Permission Set is already added or not?

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Check If Process (URL) Exists

Aug 4, 2011

How would i just if a website exists, and, if so, launch a browser to open it. I am making a little tool for one of my freinds and it allow then to quickly launch websites. How would I check if that is a valid website to launch, so i don't get an error if it is not valid.[code]The error i want to stop is "Cannot start process because a file name has not been provided."So basically i want to make sure that the program can launch the URL so i don't get this error

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Check If Regestrykey Exists?

Nov 17, 2011

I cant get the following code to check if my regestrykey exists can some one help. the idea is to check if it exists if so do nothing if not create it, along with its value...

the full key is HKEY_LOCAL_MACHINESOFTWAREVTSAdvanced Offset 2AdminAccess
> If Dir$("HKEY_LOCAL_MACHINESOFTWAREVTSAdvanced Offset 2Admin", vbDirectory) <> "" Then

[Code]....

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Check If Registry Key Exists?

Feb 23, 2010

I need to figure out if a registy key exists under the HKCU hive. If the key exists do this, if not then this.

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Check If SQL Record Exists

Jul 19, 2011

I have a small database. 2 main tables called CaseDetails and Checks.Each record in CaseDetails can have 3 checks recorded against it in the Checks table. But can only have one check of each type (check types 1, 2, 3).I have 3 linkbuttons which will take the user to the input form for each 'check'. If a 'check' already exists i want to hide the linkbutton that takes the user to that 'check type' input form (the 3 input forms have different fields).So what i need to do, is connect to the SQL database and see if a record exists for each 'check type' and hide the linkbutton to prevent users from entering another record with the same 'check type'?I have tried reading the reults into an array and examining that array, but havent been able to do so.

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Check If Username Exists?

Nov 15, 2011

I'm doing an application to manage a school of music, at the moment i'm working on registration (with MySQL DB).

Imports MySql.Data.MySqlClient
Public Class Admin_Reg
Dim server As String = "Server=localhost;Database=escola_musica;Uid=root;Pwd=;"

[Code].....

Now i want to verefy the table if the username exists or not. If it exists msgbox "Registration Complete", if not "Username already exists. Choose another one..."

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Check To See If Registry Key Exists

Sep 15, 2006

I am trying to figure out how to check if a registry key exists. If it does, do nothing, if it doesn't, recreate it.I've found numerous resources on the subject, and have made progress, but one little thing is stoping me.[code]The problem is that this reports "Not Found", even though the key 'regkey' exists in the registry. Also, if I remove 'regkey' from the code, it reports "Found". So it does find the subdirectory in the registry.My question is, how do I check to see if the 'regkey' exists? I'm running Windows XP Pro SP2.

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How To Check If A File Exists

Feb 2, 2011

Have only just started trying Visual Basic after using Delphi almost ever since it first came out. How on earth do I see if a file exists? - simple terms please

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How To Check If Already Exists In Folder

Dec 2, 2011

I am trying to copy some files to folder.I am using the following statement to check if the source fie exists If My.Computer.FileSystem.FileExists (fileToCopy) Then But I donot know how to check if file exists in the folder before copying.

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How To Check If Battery Exists

Feb 10, 2012

I come back to the MSDN to ask another question now. That is:

How do you check if a battery exists in a computer?

I have the code here to figure out battery percentage.[URl]..But if a battery is not inserted it will show battery 100% and charging instead of it showing that a battery does not exist.

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SQL Check If Exists Before Update?

Jun 5, 2011

I would like to see an example how to check if pappssn exsist in database before the update is complete. If so to raise an error record exsist. My front end is VB however i would like to handle this within SQL in my stored procedure if possible.

ALTER Procedure [dbo].[usp_insertmemapp](
@pappfname nvarchar(50),
@pappmname nvarchar(50),

[Code].....

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Subroutine To Check If Certain URL Exists Or Not?

Jul 1, 2009

VB 2008 Express. I am trying to code a subroutine that checks if a certain URL exists or not. When I start debugging the application, and I press 'btnGo', if the URL in the textbox 'tstbURL' exists, it works fine, but if it is invalid, a first chance exception of type 'System.UriFormatException' occurrs in System.dll.

Here is my code:
Private Sub tsbGo_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tsbGo.Click
If tstbUrl.Text = "" Then
Return
[Code] .....

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VS 2010 Find A Element On A Page And Click It?

Aug 18, 2011

I'm using a web browser in my vb forum and it to find a certain element then click it when the element loads. The thing is though i don't want it to use the actual mouse if you understand what im saying. Like a appliation thats clicking certain elements but i can still use my mouse to do stuff that i want. Here's the code i have so far

[Code]...

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Check If An Infinity (or NaN) Number Does Exists?

May 22, 2009

I am using vb express edition 2008. I need to check if an infinity (or NaN) number does exists but I don't know what my mistake is.

Dim Slop1 As Double
Slop1 = (20 - 10) / 0
If Double.IsNaN(Slop1) Then
MsgBox("Check the Coordinates")
End If

whats the diference between the 'IsNaN' and 'IsInfinity' is?

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Check If .dll File Exists And Load It

Nov 28, 2011

What is the easiest want to check if a .dll file exists, then to load it ? ( i don't need to use modules from that dll file, i just want to run it ).

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Check If A Certain Value Exists In An Sql Server Database?

Nov 17, 2009

I have a database created and tables inserted into it. One of the tables is called UserLogin. It consists of two columns, BarcodeId and Technician. I have a barcode value, and what I am trying to do is check if any of the values in the BarcodeId column of this table is equal to the barcode that I have. Then when I get a match, I want to get the Technician that matches that BarcodeId and display the Technician in a text box.

I was using this code sample:

Private Sub HasRows(ByVal connection As SqlCeConnection)
Using connection
Dim command As SqlCeCommand = New SqlCeCommand( _

[Code]....

I'm not sure if I am on the rught track or not, when the code gets to the line connection.Open during debugging, nothing seems to happen.

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