How do you check if webclient.downloaddata is working? I mean what if the site you are trying to access suddenly turns down. How do you avoid getting an error? Below is an example
Dim webclient As New WebClient
Dim eIP As String
eIP =
[Code].....
I have been prototyping a simple site search tool.I found some online references to using webclient.download data. I have a (mostly) working prototype, but it only returns static HTML on the page that is being searched.I also would like to be able to search the contents of controls (such as text in label controls that are set at run time.) In the code below, the data in label1 is not returned.[code].....
View 3 Replieswell its werid it worked once but then it just randomly stop i do havenamespace
Imports System.net
Imports System.IO
[code].....
[Code]...
i am not getting any errors either i am using Imports System.Net
I am trying to write a program to download an image at certain time intervals from a website based on a start time, end time and the time interval. I am trying to use 3 timers to accomplish this. I want to be able to kick the program off and leave it running until I stop it. My code seems to work fine if I set the time interval for something like 2 minutes, etc. and sit and watch it, but if I set it for an hour and leave it alone, it gives me almost sporadic results.
I set it to start at 10 pm last night and end at 5 am this morning with an interval of 1 hour. It downloaded an image at 10 pm, 11 pm, 12 am, 1 am, 2 am, and 3 am and then there were no images for 4 and 5 am. I have tried this multiple times with different time spans, and seem to get sporadic results. Any insight would be greatly appreciated. Here is my current code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If TextBox1.Text.Length = 0 Or cmbStartTime.Text.Length = 0 Or cmbEndTime.Text.Length = 0 Or TextBox2.Text.Length = 0 Then
MsgBox("You must select an image destination, start time and time increment.")
Else
[code]....
I am uploading a file from a C# application to an ASP.Net website, both written by me so I have access to the code.But, it is working for a text file (1KB) but not for a MOV file (77MB).
In both cases, I am using UploadProgressChanged to get the progress. The TXT file goes to 100% while the MOV file goes only till 50%. When done, I only find the TXT file saved on the server but not the MOV file.
Why is this happening? How can I get it to work?
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I am using this function to get web page page source to my textbox.
Code:
Public Function OpenURL(ByVal strURL As String) As String
Dim client As New System.Net.WebClient
Dim data As System.IO.Stream = client.OpenRead(strURL)
Dim reader As New System.IO.StreamReader(data)
Dim s As String = reader.ReadToEnd()
[Code]...
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 RepliesI've got some simple code to download a web page :-
Code:
Shared Function Download(ByVal URL As String) As Byte()
Try
Dim fileReader As New WebClient()
Dim P As New WebProxy("http://proxy01:8081")
[code]....
The problem is that the page doesn't download in full although there are no errors to go on. If I do view source on the page in IE the file size is over 100k. If I download the page using the code above it is only 11k. The only thing I can think of is that the page uses frames and the code is only downloading one of them.
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]...
What's the easiest way to check ADO.Net connection is working? my mssql database is on another pc.
View 3 RepliesHow can I check if RDP credentials are working?
View 7 RepliesHow I can check if the internet connection is working or not? i have to check every few seconds without getting stuck.
View 9 Repliesis there any way to check if an email is active without sending it an email? (meaning that it does not get returned) if i have 20,000 emails in my email list, and i do decide to send all of them an email, how can automatically cross out the email address that got returned?
View 7 RepliesHow do I check if httpwebrequest is doing what it needs to do?
Since theres no webbrowser involved your kind of left in the dark and cant actually see if what you programmed worked.
I have a Session value that stores an integer representing what permission a user has to perform tasks in my application. For some reason now however, the function to check the permissions is not working. On the line indicated by the comment, the CTYPE action always returns the integer value, and not the list of Enum values. Can anyone please see what's going wrong here.
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I have made a form that consists of textboxes nested in groupboxes nested in tabpages. I want to check if all textboxes are empty in every groupbox and even if the controls from a groupbox in a groupbox are empty.When they are empty i should not create an element string for my .xml document.Below is the code that I have at the moment. I call it with the form as the parameter.
Public Sub recurringControls(ByRef ctl As Control)
For Each c As Control In ctl.Controls
If c.Controls.Count > 0 Then
If c.Tag IsNot Nothing Then
[Code]...
i am trying to get this code that worked in VB6 just fine to work in VB.net 2008. It doesnt seem to want to connect (but has no error after it goes past the sockMain.Connect().
[code]...
I get the It doesnt seem that the server is running. Please check it and try again. error.
I would like the VB.net WebClient to remember cookies.
I have searched and tried numerous overloads classes.
I want to login to a website via POST, then POST to another page and get its contents whilst still retaining my session.
Is this possible with VB.net without using WebBrowser control ?
I tried Chilkat.HTTP and it works, but I want to use .Net libraries.
I use
wb as webclient
wb.downloadstring(url)
Say 40 seconds have passed. I want wb to just give up. How to do so?
as per usual i am a little confused. I know DownloadStringAsync runs on a threaded pool with a default min and max threads limit, but what confuses is how would i call DownloadStringAsync say for example ten times.Example.I have an array with 10 URLS. Surely i would not use a for each loop of the array index to pass the url address while each time calling DownloadStringAsync(New Uri("someArray(index)") surely we can pass say a range of items from the array and let DownloadStringAsync decide on the threaded pool how many to process each time?
View 6 RepliesUsing the following VB.Net simple code to upload files in FTP, a call to WebClient.CancelAsync() doesn't actually cancel the upload.Does someone know why, and what can be done about this?
Private Sub UploadProgressChanged(ByVal sender As Object, ByVal e As System.Net.UploadProgressChangedEventArgs)
'TO-DO: Why is pbar empty?
ProgressBar1.Value = e.ProgressPercentage
Label1.Text = e.BytesSent & " bytes sent"
End Sub
[Code]...
differences between HttpWebRequest and WebClient and why I should use either.
View 1 RepliesI am trying to use system.net to download a zip from a website.I am using the following code .[code].....I am doing something wrong here.The zip file is getting downloaded but the size is not correct.How to know the size of the file I download and assign to my buffer .
View 1 RepliesI use webclient to download a file Async. Defined in the Globals.
Public WithEvents wbclient As New WebClient
I am trying to use WebClient to download a .zip file from my server. In debugging mode the code works perfectly, but when I deploy my software the file does not even begin to download.After my program checks to see if an update is available, it should download the .zip file from my web server via the following
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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 :
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I am using webclient class to post some data to a web form. I would like to get the response status code of the form submission. So far I've found out how to get the status code if there is a exception[code]...
Is there some way to get the status code when there is no exceptions thrown?[url]...
I am trying to automate the daily retrieving of a web file using .NET.The file is a PDF located at an address similar to: url...and these are the headers of HTTP request registered for debug using IE.[code]Can you please suggest me a way to get it and save it locally using WebClient, WebBrowser or other VB.NET (Framework 4.0) components?
View 1 RepliesI have donsome programmng in the past but am just getting back into it.I am trying to post to the following webpage. I need to fill in the "upfile" box and submit.[code]I keep getting 501 not implimented errors. I have asked my mate Google and cant find anything.
View 3 Replies