Download Page To A String?
Dec 10, 2010
I've been using this simple code to download a URL to a file :-
Code:
Shared Function DownloadFile(ByVal URL As String, ByVal LocalDest As String) As Boolean
Try
Dim wc As New System.Net.WebClient
Dim u As New Uri(URL)
[code]....
Then simply load the file in to a string and find the data that I need.
1. Is there a more efficient way of downloading a web page directly into a string without having to save the file physically to my hard drive?
2. Can I specify a timeout somewhere?
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Sep 1, 2011
I'd like to create a asp.net download page. I receive the file from a dataservice as a byte array. The file size can be up to 10gb. So I need to transfer the file "in parts".
Here is my code:
Response.ContentType = "application/octet-stream"
Response.AddHeader("Content-Disposition", _
"attachment; filename=" & HttpUtility.UrlEncode(file.Name))
[code]....
The code snippet works but I have a big problem. The download already starts before the user confirmed the browser download dialog. If the user waits 5min he has already downloaded the 10gb file without accepting it.
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May 4, 2012
I am very fairly new to web programming. I am attempting to download an excel from an ASP.net website. IT does not need authentication, however I am unable to debug the URL as firebug would just not how me the request URL. Searched high and low.
Website: [URL]
Actions: I click "Summary Download" button to download the excel.
I have no idea where the onClick() goes.
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Jun 2, 2010
I want to request a page(file) of information from a web server using VB code running on a PC. What is a simple piece of code which does this and/or the libraries/calls I need to use.
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Jun 7, 2010
i need to download page from source code..for example<span id="businessNumOnMap" class="resultNumberOnMap" style="display:none;"></span><span><a ref="/len/aapproximatch%20search/285295.php" onclick="loadBusinessInfo('0', '285295'); return false;" class="businessName">Cellini's Italian Restaurant</a>i want to download the "/len/aaproximat...php"..i didnt find the suitable regex for it..and i need to download that page
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Apr 2, 2009
This code makes the the download dialogue open for the file I want downloaded .
Response.ContentType = "application/octet-stream"
Response.AppendHeader("Content-Disposition", "attachment; filename=" & FileName)
Response.TransmitFile(Server.MapPath("~/Admin/EmailLists/" & FileName))
Response.End()
After the download dialogue opens I need a series of changes to happen on the page, but I have noticed all the code after this code will not run. Anyone know how I can make the page changes occur AND get the download dialogue to pop up?
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Jun 21, 2010
i want to download a file from a SSL web to my local(C:)
[URL]
Scenario: from the web browser(Internet Explorer), i required to login to the site in order to download the file.
in the vb program i pass in this url to download the file (include my password and username): [URL] but what has been downloaded to my C: is the login page(in myfile.txt) but when i use the url on the web browser[URL] i managed to get the file (the actual file).
Question: is there anyway that i can download the file from a login page?
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Mar 13, 2009
Dim wc As New System.Net.WebClientGamerTag.Replace(" ", "+")wc.Credentials = New System.Net.NetworkCredential(Email, Password, "http://live.xbox.com/en-US/profile/profile.aspx?GamerTag=" & GamerTag)Dim fx As New System.IO.StreamReader(wc.OpenRead("http://live.xbox.com/en-US/profile/profile.aspx?GamerTag=Dark Slipstream" & GamerTag))Dim str As String = fx.ReadToEndfx.Close()
The above code will open a webclient, set the credentials (possible error?), create a stream of the entire page, and then load it into a string (str).I then scan through and look for what is needed (Gamerscore, Motto, Bio, etc)-in this case.This doesn't work however, it doesn't sign in.
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Aug 9, 2011
In a loop, I need to read a list of URLs from a text file, download the web page, and search for a bit of text using a regex. I used the following code, which triggers the error "WebClient does not support concurrent I/O operations.":
[Code]...
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Jun 30, 2011
I am developing a website in ASP.Net and VB.Net to allow users to upload and download files from and to an FTP site and my desktop.
I have successfuly got the upload side working.
As far as the download part is concerned, I have so far got it so that when the user goes to the download page, the FTP file list appears so you can see the files that are currently residing on the FTP site.
I was wondering if there is a way that I can program my site so that the user can select one of the files and click on the 'Download' button that I have?
Here is my code so far:
CODE:
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Nov 15, 2011
any code sample to enable user to download all pdf links on one gridview and download all by one button click instead of clicking the link one by one?
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Sep 6, 2010
i use this code to download the source of a page from a site
Dim MyWebClient As New System.Net.WebClient()
TextBox1.Text = MyWebClient.DownloadString("site")
but it doesn't work when i try to grab a site that has .php so how could i accomplish downloading the page source of a site that ends with .php
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Jan 11, 2011
I'm trying to use a java servlet in a 3rd party tool's web interface (CA service desk) to invoke it's download file functionality using a webclient in vb.net. The trouble is the text stream from response is markup and not the acutual text file stream.
It's like the page is redirecting to another page which actually presents the file for downloading. I have no idea what the redirected page URL is.
Is there a way I can process this redirected page in order to get at the download using a system.net.webclient?
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Apr 8, 2011
I want to download the same information which is obtained when we right click view page source in browser. I want to do this either in vb.net or perl
I need it for google image search result webpage.When that page is saved then html code is not same as view page source info.tags for images are absent. [code]...
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Jun 10, 2012
I guess that I'm not the first who ask this, but what is the easiest way to use threads in VB.NET? I mean, I need to download some string from a remote server and then to show that string in the GUI, so I have to use some callback function to call it in the main thread. I found different approaches for this, but all seems very difficult compared to Python where (with GTK) I used something like: gobject.idle_add(callback_function, parameters) and "callback_function" was executed in the main thread. How I do that in VB.NET?
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Aug 8, 2011
I read the following question to download a web page whose contents is coded in UTF-8. The page is then converted into a byte array, while I'm using a String to read contents from the page.
I need to turn UTF-8 into Latin1/ANSI since that's what RichText and MessageBox seem to use (I'm getting funny characters).
Is there a more direct way to donwload a UTF-8 page and convert it into ANSI/Latin1?
Edit: When callig MessageBox, accented characters are not shown as expected:
Content = CStr(e.Result)
'Théâtre, Métro
MessageBox.Show(Content)
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Jul 2, 2009
I'm trying to Download a String from a Webpage, but in order to do that, I need to download the whole webpage. I've found it easier to use DownloadString, but I can not figure out how to process each line of the Downloaded String, as it is one whole string.
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Dec 14, 2009
I am using this to download the source code from a web site but it is not downloading all the links:
With Form2.RichTextBox1
Dim instance As New Net.WebClient
Dim aAddress As Uri = Me.WebBrowser1.Url
.Text = instance.DownloadString(aAddress)
End With
If I right click with the mouse on the site and view page source the links are there but for some reason download string is missing them.
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Apr 24, 2011
My.Computer.Network.DownloadFile _
("http://example/example.exe", _
"C:example.exe")
I'm using this code to download a file can I add User Agent String so protocol analyzers could have info about this download with a custom string I make.
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Oct 24, 2009
How do i can skip crash if file is not exists which comes if app try download string.
So: http://127.0.0.1/Script/Info/ScriptList.txt
(If ScriptList.txt is not avaible how do i can skip crash and say messagebox: "File not found." instead of crash and apps close)
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Aug 12, 2009
I have a requirement to move the html text available in a string builder to a word document and open the word document after the data is appended in a VB.NET console application. I am new to console applications and am not sure how this could be done, but I am aware that if I am using a Web Application then I can use the following code:[code]
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Jun 12, 2011
I have a text input in textbox1 in tab page 1 and i want that text from textbox1 will be displayed in textbox2 in tab page 2.
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Oct 5, 2010
I wrote a page Page method in my aspx page. in web service method I need to call FindControl method return textbox and get text box value. But my findControl will take MasterPage object to iterate.
see my code
<script type = "text/javascript">
function ShowCurrentDateTime() {
$.ajax({
[Code]....
How to pass Master Page object or Page to Page method?. So I can use in Sared method.
Is there any way I can access Textbox value directly in Page method? I need access couple of controls in Page Method.
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Nov 4, 2010
HOW TO RUN THE JAVASCRIPT FUNCTION ON PAGE ONLOAD EVENT IN CONTENT PAGE OF MASTER PAGE.? means i have masterpage and the content page of master page namely default.aspx in vb.net.i wanna run javascript function in Default.aspx and i have called the function body onload in master page.when i run my website it shows the error "" Microsoft JScript Runtime Error : Object Expected ""
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May 17, 2012
I need sample vb.net code to save single windows form as many page and reload the page whenever i call that page...
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Nov 14, 2011
I am able to get ALL id's on the page but I wanted to be able to get this particular string of html
<input autocomplete="off" type="password" tabindex="3" size="25" name="password" id="password" value="" onfocus="_helpOn('help__password')"
Here is my current Regex: id=.*". This get ALL the freaking Id's on the page. I've tried using regexr but it's not giving me any results. How I can get this to only show me:
id="password"
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Apr 2, 2010
I have a VB application. Within this application, I have two "pages". I'm trying to access or change data from one of these pages from the other. So, for example, let's call the pages 'Page 1' and 'Page 2'. Let's say I'm working in 'Page 1' and I want a MessageBox to pop up when you click a button and I want the message box to contain the value of a string from 'Page 2'. How would I do that? I think if I had the answer to this one simple question, I should be able to solve all of my problems. I understand the basic structure of VB, but I can't figure out how to tell the program to access data from another page within the application.
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Nov 18, 2011
I usually download file using following code:My.Computer.Network.DownloadFile("url of the file","filepath to save the file")But recently I encountered a site that only allow file download if you click it from its site and not via direct downloading from vb.net code.How to download file from http server that requires a referral before allowing the download?
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Jun 13, 2011
How can I get Webbrowser1 to navigate to each page and wait for the one page to completely load, then move to the next page...? [code]
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Jun 10, 2009
how can I calculate the download speed if I use a webclient to download files async
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