.net - Get XmlItem.Value Even If Element Does Not Exist?
Mar 19, 2011
I am starting out with xml and vb.net here, my xml looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<Steps>
<X cmd="Message">
<Message>Hello World</Message>
[code]....
it works if all the elements are found (< Message > and < Title >).. but if for example the element "< Title >" is not found I get an error by trying to get the innerText.Is there a way to ignore these errors, I just want to receive an empty value and not any errors.
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Dec 21, 2010
I try to find online any example for create an application autoupdate.
When I run my application it check in a webserver if exist new version,if exist the software run update.
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Nov 25, 2010
namespace of "system.runtime.caching" does not exist but in object explorer and microsof exist.i use microsoft visual studio 2010 and .net framework 4.0.i also cant use this name space(System.IO.MemoryMappedFiles & System.Runtime.Caching.MemoryCache)
any body know what is the problem. i want my program after doing something (opening a file or any thing that can do something my program use more memory.)use memory like startup run.
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Jan 16, 2011
Here's my code:
Option Infer Off
Option Explicit On
Option Strict On
Public Class Form1
Public Sub NewToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NewToolStripMenuItem.Click
[Code]...
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Feb 14, 2012
I have a number of rewrite rules for a lot of things that I did in IIS7, like removing trailing slashes, canonnical URLs, lowercase lettering, and such. IIS altered my web.config, and everything works fine on the website, like it should. But in the Visual Studio web.config, the opening < rewrite > statement is underlined in blue, and at the bottom of VS, it says that the element 'system.webServer' has invalid child element 'rewrite'. But this is how IIS made it. I didn't do this manually. Should I be concerned with this VS error, or should I just leave as be, since it's working how it should work? Here's an example of my web.config:
[Code]...
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Apr 13, 2011
Is there a way to control the way a browser behaves such as if I click on this link it doesn't navigate to that link but instead show me the source code behind that button?
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Mar 11, 2010
I need to randomly pick an element from an array and I can only use that element three times,I can randomly pick the element but how do I go about only using it three times.
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Sep 16, 2009
I have Requests for VB(2005) very very important for my selly project!i need a button that determine if file exist and if that file exist then show a messagebox!and if not show messagebox!.
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Apr 23, 2012
I want a Code to check Database exist in SQL and Message Box Show Database Exist Yes/NO?
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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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Jun 7, 2011
I want to be able to reference an element in an array of structures by the name of the element in a visual basic 2010 function. For example
Public Structure myStruct
Public element1 as string
Public element2 as integer
Public element3 as boolean
[code]...
Is it possible to reference a structures element by the element's name in a similar way to that shown above. The code shown above does not work, as the expression obj(i).[elementName] does not work as hoped.
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May 23, 2012
I have the following XML:
[Code]...
I am accessing the name of the child element like this:
[Code]...
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Mar 3, 2011
I would like the following function to return Nothing if the element with the specified key is not in the collection. Instead, it returns an error - something to the effect of "no element found"
Public Class MyCollection
Inherits System.Collections.ObjectModel.Collection(Of MyType)
Public Function FindByActivityKey(ByVal searchValue As Integer) As MyType
[code]....
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May 24, 2012
I would like to associate a web page element, a textbox for example, with a textbox in my form. When a user types something in the textbox, I would like it to be like he types it on the webpage.
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Oct 2, 2009
I know I can create XML ouput in Example 1 as follows using the following code in Example 2. How do I create the same output in Example 3?[code...]
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Jan 17, 2009
Using VB.Net and Sql Server I want to check the user Entry Value.The User is entering the code in the textbox, before saving to the table, i want to check whethere code is already exist in the table or not.
Tried Code
cmd = New SqlCommand("Select code from table where code = '" & textbox1.Text & "' ", Con)
dr = cmd.ExecuteReader()
While dr.Read()
End While
If value is exist, then message to the user "Already Exist" other wise save to the table.
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Jan 15, 2012
i am new to VB.net. just want to check an id number in my textbox if its aldready existed in my database. this is my condition: if textbox1.text = ds.tables("employees").row(0).item("id") then msgbox("ID already exist") end if
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Aug 8, 2011
[code]...
If the code exist in the table only it shows the description
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Jun 11, 2011
I feel quite silly posting this as I know my way around C++ decently and am writing an application in VB however I am getting quite frustrated with this problem.
Dim FileNo As Integer
FileNo = FreeFile()
Dim FILE_NAME As String = "C: est.txt"
[Code].....
When executing the above code it says at the FileOpen operation that the document does not exist or the relative path may not be right... I have looked in many place over the internet and even used the same examples from the Microsoft website however I get the same error.
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Jul 16, 2010
I want the oppisite of
If My.Computer.FileSystem.FileExists() Then
end if
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Aug 4, 2011
I'm getting a suprising FileNotFoundException although i'm sure that the file exists.I simply wanted to add Logfiles(IO.FileInfo) as attachments to an email, therefore i tried to check the length of every file to detect if they must be added/zipped.This works fine if these files already exist. But if i've created them in this run, i get above exception when i try to check the length. It's oddly enough that i can write into these "not existing" files(actually FileInfo.Exists returns false) without a problem one line before.
Here is some code...
Creating one of the files in the constructor of a class named Log:
Me.LogFile = New IO.FileInfo(infoLogPath)
If Not LogFile.Exists() Then
'tried to use `Using` on the Stream but that doesn't change anything'
[code]....
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Feb 1, 2012
Basically I just want to use
tile1.backcolor = colors.while (just an example)
however tile1 is only created WHEN the form loads, and it will not let me compile it becuase it's saying it doesn't exist
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Nov 17, 2009
I want to check inside a dir if any folder exists. Every way I found is to check for a specific folder with name as string. I want something like
folderExists = My.Computer.FileSystem.DirectoryExists("C:TestDirectory*")
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Jun 21, 2007
how do i verify a file like a image or html exist on the web?
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Nov 18, 2009
i am having a problem in writing the code that checks whether a directory exists or not in FTP using vb.net..
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Jun 21, 2010
I had it working at one point now it does not want to work. Im checking the registry for a subkey and I know it exists but vb is telling me it doesnt, which is driving me up the wall, this is what I got[code]...
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Jun 4, 2011
My tables are PURCHASE and SALES...In PURCHASE table, fields are CODE(primary key), PRICE, DATE, TOTAL, QTY...when I'm entering datas in form and when i click submit, the datas stored... but when i enter same DATA(CODE), it is showing error...i don't want to show the DEFAULT ERROR message...so, i want to search whether the CODE is already in database or not...i.e When i click SUBMIT button, 1st it has to search whether the CODE is already PRESENT in table or not. if it is not there, DATAS have to be stored. otherwise, it has to DISPLAY MESSAGE BOX.
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Apr 30, 2008
I am trying to change over a program from VB 6.0 to VB 2008 and I am having trouble with the EOF statement. [code] Argument not specified for parameter 'FileNumber' of 'Public Function EOF(FileNumber As Integer) As Boolean'.I have a Dataset with a Table called Table1. How do I get VB 2008 to perform the "Do While Not Table1BindingSource.EOF statement?
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Nov 15, 2011
I have two DBF tables called product and ullage. The user enters data from products table into ullage, by searching for product id and adds their count into the ullage table. This part is working. how can I display the products table with all the prod_ID, Desc and price with Counts from the ullage table but were there is no count in the ullage table these product will be displayed but with no count number.
The Tables....
Product table
Prod_ID | Desc |price
1 Food 5.99
[Code].....
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May 1, 2009
I am just trying to learn Visual Basic in 2008. I need some help theory about dll and ocx files. I have seen videos tutorials, and in some of them they use some additional files. i.e. MSwinSck.dll, or DVD .dll ect. But lot of these files does not exist in my program, noone is telling about these files and where to install them or how to get them.
[Code]...
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