.net - HtmlAgilityPack Interfering With Code (not A HtmlAgilityPack Question)?
Sep 13, 2010
Here is a snip of my code:
Dim content As String = ""
Dim web As New HtmlAgilityPack.HtmlWeb
Dim doc As New HtmlAgilityPack.HtmlDocument()
doc.Load(WebBrowser1.DocumentStream)
Dim hnc As HtmlAgilityPack.HtmlNodeCollection = doc.DocumentNode.SelectNodes("//div[@class='address']/preceding-sibling::h3[@class='listingTitleLine']")
I'm using HTMLAgilityPack in a parser that I have up on a server, but I'm having issues with one of the websites that I'm parsing: Every day around 6am they tend to shut down their servers for maintenance, which throws off the Load() method for HTMLWeb, and makes my app crash. Do any of you guys have a more secure way of loading a website into HTMLAgilityPack, or maybe some way to do error checking in C# to prevent my app from crashing? (my c# is a little rusty). Here is my code right now:
HtmlWeb webGet = new HtmlWeb(); HtmlDocument document = webGet.Load(dealsiteLink); //The Load() method here stalls the program because it takes 1 or 2 minutes before it realizes the website is down
I am trying to take a string that I have marked up through vb.net code and cross-check it with the text file it came from originally. This is for proofreading the html output.To do this, I need to parse an HTML snippet that does not come from a URL.The examples of HTMLAgilityPack I have seen get their input from a URL. Is there a way to parse a string of marked-up text that does not include a header or similar parts of a well-formed webpage?
Im trying to scrape some text on a webpage, I asked in the regex section and they recommended to use HtmlAgilityPack with Xpath to scrape the info I want.
I have this html. I'm trying to get its InnerText without any tags in it,[code]What am trying to do is get the text as the user would see it from the class thisclass.I want to strip any script tag, and all tags, and just get plain text.
I'm using the HTMLAgilityPack to parse HTML pages. However at some point I try to parse wrong data (in this specific case an image), which ofc fails for obvious reasons. Code:
How to check whether the content is 'parse-able' before trying to parse it to prevent the error? For now it is an image which makes an error popup however I think it might be just anything which isn't (x)html.
I am trying to take a string that I have marked up through vb.net code and cross-check it with the text file it came from originally. This is for proofreading the html output.
To do this, I need to parse an HTML snippet that does not come from a URL.
The examples of HTMLAgilityPack I have seen get their input from a URL. Is there a way to parse a string of marked-up text that does not include a header or similar parts of a well-formed webpage?
Im having a hard time finding tutorials for the HtmlAgilityPack, all of them are for c#, so im having to use c# code and convert it to vb.Here is the my code, im still getting errors with the 3rd line:[code].......
but am getting an error Object reference not set to an instance of an object. the document contains at least one anchor-tag? how do i check if an attribute exits? i tried this if link.HasAttributes("title") then and get another error Public ReadOnly Property HasAttributes() As Boolean' has no parameters and its return type cannot be indexed.
Im using HtmlAgilityPack/HAP so that I can use Xpath with HTML documents.selecting the preceding-sibling of div class="address" in this url[url].....The sibling that I want is h3 class="listingTitleLine" Here is a screenshot:
I am trying to grab a html table from a remote page and display the contents of this table in a htmltable on my site. I am using htmlagility pack. So far here is my code:
Imports HtmlAgilityPack Partial Class ContentGrabExperiment Inherits System.Web.UI.Page
I have spent way too much time trying to sort this little issue out. I have narrowed down the issue to the exact procedure that throws the error. Yes, I have used Google..
Try Dim tempSource as String = Nothing Console.WriteLine("Loading document...")
[code]....
I am loading a text file, that contains about 1100 lines, and each line is going to be processed with HTML Agility Pack. From what I can tell, when it runs "doc.loadhtml(richtextbox1)", it throws the error. I also have tried to load the file into a string, and load the string with "doc.loadhtml(thestring)". It doesn't make a difference, still errors.
I am using HTML Agility Pack, however the above is what is on every line, about 1100 lines! For testing, I have a smaller text file made of about 50 lines before I load up the 1100 line file ;) There aren't any HTML, HEAD, or BODY tags! They aren't needed for my parsing. I am using HTML Agility Pack because it is easy to parse elements with. I can grab each value easily from each line.
I am not sure if maybe the error is because it technically isn't HTML? Meaning since the loaded code doesn't have an HTML or BODY tag, that it errors? I wanted to get this question posted, and while I am waiting on some answers, I am going to parse the document another way. Just curious as to what the deal is and why HTML Agility Pack isn't working. More of a proof of concept then anything, for my own learning and knowledge.
Here is the error I get (btw the on the doc.load() line, is where it throws the exception):
Object reference not set to an instance of an object
Last Note: The routine is on a background thread. I have used multi-threading before, and have delegates created for deeper in the code.
I'm trying to get all nodes below but I am getting an error message of: Overload resolution failed because no accessible 'GetAttributeValue' accepts this number of arguments.
I've built a quiz program that uses several arrays to store questions and answers. For debugging purposes I've inserted several msgboxes, when I remove them I get the same question in all of the question slots(same with answers) I spent a lengthy amount of time googling, and decided I needed to post.
Form2_load calls generateQuestion. If the msgbox is inside generateQuestion, the program works, if it is right after generateQuestion it works.
Ok this is how it is, I have my main app form, and from there I open another seperate form for scripting, but they are both open at the same time, when I run a script from the scripting form, it interfers with the main window form code that's running, I'm guessing they are both running in the same thread or whatever, how do I fix it? I've tried using thread commands but obviously it's not working,
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Try If TextBox1.Text.Trim <> "" Then If TextBox2.Text.Trim <> "" Then
[code]....
When the button is pressed, it all works and the following files are created: yahoo.dll and yahoo.pdb My question is this: What is the code to load the already compiled yahoo files to execute the code again, without having to recompile the code?
This code was posted in Chit Chat and everyone is saying how great it is. I just have Visual Studio 2010 and no familiarity with VB6 so I thought it would be good to convert the code to Visual Basic 2010.
this code was not done by me originally and there are some thigns here i dont quite understand i have altered it a bit from my coworkers code to suit my data and it works. but too slow. and when i have 4000+kb excel files it might freeze altogether. ( I have checked tho that when and after this transposer runs it will still be within the excel row limit, i had done calculations before and made a macro to automatically split excel files based on number of columns and rows to make sure this is so ). This code seems to start out fast then goes slower the longer it runs. at least this is what it seems liek to me.
I recently found this code (provided for third party use on another VB site), however,ll of my attempts to insert it into a class library have failed.I open a new class library and past the code in, and immediately get several errors pertaining to how certain objects can't be found. I find it it is crucial to use this code, unless someone can suggest to me another example of existing code that will do the same thing: make a restricted textbox who imputs can be restricted, that can handle pasting, shortcuts, text property setting, and script-entered text.
Option Strict On Imports System.ComponentModel Public Class RestrictedTextBox
I have been playing around with different types of native code operations in Visual Basic and then inspecting the code with Reflector to see what kind of MSIL is produced. For example, I wondered, in a one line If-Then-Else different than an If-Then-Else split onto multiple lines, ie.
what is wrong with my code and I get no feedback from my button click event, i have imported. ( code Below) and i have tied differrent combinations of the code without sucess.maybe add extra to my code for the list to show open Port or closed ports.
This code is for 2008, 2010 and later versions of VB.Net as it uses an extension method.Please note: If you are using an earlier version ( or you do not like extension methods ) please see the next post.Here is the code I posted on Monday April 30th, 2012.>>Now you can specify the startRadius to be
I have this string just down loaded of a Unix server. I would like to remove the box (0x0A) Unix end line code; then replace it with CR+LF normal ASCII code. Also, I would like to do the replace before I save the data, while it in memory.
I had a weird series of errors involving e.Graphics.DrawString() when painting a panel.I am using a barcode font [Code 128] with a library that converts text to the proper format for Barcode readers.That's fine, however, when I draw it to the panel, that's where things stop being fine:But, here's where things get funky. When I put it into a TextBox instead of drawing it via Graphics.DrawString(), everything is peachy:In fact, the TextBox one looks much better than the Graphics.DrawString() one! Am I doing something wrong?[code]