working in an intranet sit .downloadString took less than one second,but some times the server is down (maitenance or so on) and the the result took maybe one minute or so.Is there any way to set an lower interval?for example, if the server doesn't respond in 9 seconds return empty string, or so on.
I've read some about async comm but not sure what is the best solution.
I am using WebClient.DownloadString method in vb.netto convert asp.net page to string after that I send this string by email. by I got this error from the server
The remote server returned an error: (500) Internal Server Error.
Unfortunately, no more details about the error. what is the possible problem ?
error in the following line of code :
Dim str As String = client.DownloadString(Request.Url.GetLeftPart(UriPartial.Authority) + "/GFOPortalA/isd/ViewForm.aspx?ISD_FRM_NO=" + Session("ISD_ReqId"))
I'm getting a string response from a server using a simple call of the Webclient.DownloadString() method, the returned string is something like this:
"snakeu003Cbu003E eyesu003C/bu003E"
how can I convert that in whatever those codes means?
How can I integrate a ProgressBar in this code? It takes normally some seconds (9-10), but my program looks like a "crash", for this reason i want use a ProgressBar
[Code]...
When I go to webcrawler.com and search for something, then look at the source code, a chunk of HTML similar to this displays the search results:
<div id="webResults">
<div class="searchResult webResult">
<a class="resultTitle" data-icl-coi="540" data-icl-cop="results-main" href=[website] target="_blank">[title]</a>
[code]....
But when I use WebClient.DownloadString to read the source code to a textbox, I only get this:
<div id="webResults">
</div>
There's nothing. All of the webresults have been removed.How come I can view the code in my internet browser but not on my application?? I even used an InStr method to confirm that the results weren't contained in the generated code.
I am using WebClient.DownloadString method in vb.netto convert asp.net page to string after that I send this string by email. by I got this error from the server The remote server returned an error: (500) Internal Server Error. Unfortunately, no more details about the error. what is the possible problem ? edit: error in the following line of code :
[Code]...
I've been testing using WebClient.DownloadString and sometimes I encounter an error: "The remote server returned an error: (403) Forbidden". It is based upon which url I use. For instance, this works:
Dim wc As New Net.WebClientDim strResult As String = String.Empty
Try
strResult = wc.DownloadString("http:/ Obama pages always fails.
[code].....
I'm working on a project that scrapes data from government websites. I've noticed that whenever I use WebClient it doesn't always get the whole HTML code. Even when I get the robots.txt file it doesn't return everything. For example, http://www.bbc.co.uk/robots.txt has 80 lines but I'm only getting 13 lines.
If an HTML block uses "display: none" in the style I can't get anything between the hidden HTML blocks.Here is the sample code I'm using:[code]...
Well i want to add a listview item to the paramater of a Webclient DownloadString here is what i want
vb
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load Dim wClient As New WebClient AddHandler wClient.DownloadProgressChanged, AddressOf DownloadProgressChanged(ListView1.Items(textbox1.text)'HAVE THIS IN HERE' AddHandler wClient.DownloadStringCompleted, AddressOf DownloadStringCompleted(ListView1.Items(textbox1.text)'Have THIS IN
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I use a downloadstring (instance.downloadstring) with instance as the'System.Net.WebClient'.
View 1 Replieswhy the code below fails to retrieve the html
Dim WebReqeust As WebClient = New WebClient
Dim URL as string = "http://www.professionalorganizervannuys.com"
Dim WebPage As String = WebReqeust.DownloadString(URL)
It fails on this particular URL.
have any examples for UploadFileAsync? Including both server and client examples?
View 1 RepliesI have the following code that I'm trying to retrieve the HTML document. Not sure why it wouldn't work. Here's what I captured from Live HTTP Headers:
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How limited time for method InstWebClient.DownloadString(PageAddress)?Sometimes my apps "stop executing" in line where execute InstWebClient.DownloadString method.
IDE: Visual Studio 2010
Language: Visual Basic .Net
Library: .Net Framework 4
Code:
Private Function DownloadPage(ByVal PageAddress As String)
Dim InstWebClient As New WebClient
Dim PageContent As String
[code]....
its been a while since i've posted on the board..Well i got a problem and i stuck and i thought its time to use your knowledge.I want to make a program that its base code will do an automatic login to some of my sites i use and download the page raw source code to work with the results.
View 2 RepliesI use
wb as webclient
wb.downloadstring(url)
Say 40 seconds have passed. I want wb to just give up. How to do so?
I have a program in vb.net and with it I have an expiration Key. As an example I would like this key to be valid for 3 months .I don't want to use the users system.date in case the user changes the date.Could a public server's date time be used instead.
View 6 RepliesI am using the code below to upload a file to a server running windows IIS 5.1.
I am just testing on my own computer to see if this works ok. However, I keep getting the following error message:
The remote server returned an error (405) Method Not Allowed I am sure this is a IIS problem maybe something to so with permissions. However, I am configure the virtual directory to allow read, write, and directory browsing.
The config.xml file I am trying to upload is located in the same directory as the executable and does exist.
Private Sub upload_config_to_server()
Dim url As New Uri("http://localhost/softphone/config.xml")
Dim wc As New WebClient()
[Code]....
I'm trying to filter submitted web sites by attempting to browse them while bouncing the request off of OpenDNS. If the page received is the OpenDNS page, I'll assume the page shoudld be blocked.
How might I accomplish this task using the System.Net.WebClient class?
I can download the files I want. However, the client has insisted on creating different folders which will contain the version number. So the name of the folders would be something like this: 1.0.1, 1.0.2, 1.0.3, etc.So the files will be contained in the latest version in this case folder 1.0.3. However, how can my web client detect which is the latest one?
View 3 Repliesworks fine for my purposes for checking for a new file version, but it still locks up the UI when it is connecting to the server. Once it connects, the UI unlocks but I'd like to eliminate the brief 3 second lag it causes.
View 2 RepliesMy program takes user input, replaces all spaces with "+", then inserts it into a search url for a specified web host. For example, the user enters:"How long is a foot?"
The generated URL (in this case I'm using dogpile.com) is:
"http://www.dogpile.com/info.dogpl/search/web?&q=How+long+is+a+foot"
This method has worked before for me, but now I just get an Internal Server Error every time the code is executed.
I do the same thing with URLdownloadtoFile: IT WORKS.Wih the WEBCLIENT part I just DO NOT GET the Text file from the PHP/MYSQL server: I only get message "Invalid Username/Password or no list download permission: ||"
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim urlStr1, urlStr2 As String
Dim fileToStoreStr, fileToStoreStr1, fileToStoreStr2 As String
[CODE]...
i got the function, but it only can get the outer html, any method or suggestion to get the innerhtml with webclient?
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I make a lot of programs that require an internet connection to download things from the web.At the very beginning, I used WebClient, as I didn't know Socket & how it worked.But now, I use Socket all the time, altough it's more lines of code. It seems to work faster then WebClient.I am interested if this is really true & why WebClient is slower (so is HttpWebRequest) then just a Socket.I've setup 2 threads which starts on the click of a button (WebClient thread starts first), the Socket beats the WebClient by just some milliseconds, but still.Each way has it's advantages & disadvantages, e.g.: if you use Socket, you need to write the header yourself & parse the response header.My question is, which one do you prefer & why ?Do you know why WebClient & HttpWebRequest are slower then Socket, as I assume, WebClient & HttpWebRequest both use tcp to download the things.
View 2 RepliesI am trying to download a 163 KB jpg file from the web with Webclient. The dimensions of it are ~332 x 491 pixels.
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I'm using the WebClient class' OpenWriteAsync function, and I'm having a little trouble with it. I want it to write some information to a .txt file I have uploaded on my FTP. I made it display a message after it has completed doing so, and the message does indeed pop up.However, I've checked my .txt file numerous times, and it hasn't actually been e Here's some of my
Dim otherclient As New WebClient()
AddHandler otherclient.OpenWriteCompleted, AddressOf WriteCompleted
otherclient.OpenWriteAsync(New Uri(URL))
[code].....
I am working on a windows application project on NIST time synchronization, but can't get a proper solution for it. If anyone can send me the code to synchronize time from the global time server in VB.net or C # code
View 2 RepliesI am using stored procedures in my application using vb.net, while executing stored procedures on mysql database server thru application, the response time from the server is more. Is there any settings that i need to set on mysql db server or any changes in connection string or in code.
View 14 RepliesI am trying to get my program to read async so it doesn't just freeze up while it fetches the data. I have:
SR = New StreamReader(WC.OpenReadAsync(New Uri(url)))
Dim html = SR.ReadToEnd.ToString
It keeps throwing the error "does not produce an expression". I remember trying this in the past, only to have the same error.