Take Url Given By User From Input Box / Create New Webclient To Handle Download asynchronously
Jun 13, 2012
I'm trying to code a program that can download multiple files at once (on different threads of course).I have created a custom listview component that will allow me to add a progressbar directly to it.What my real question is, how can i take a url given by the user from an input box and create a new webclient to handle the download asynchronously and also report the progress without disturbing all of the other downloads in progress?
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Jun 7, 2011
I am trying to build a code to get the website asynchronously using webclient.download stringasync..I want to pass the data thus retrieved from dowloadstringcompleted to another function.[code]My problem is that I am not being able to pass on the values as StartDownload gets completed, while data is still being retrieved.
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Mar 10, 2011
how do I handle the errors that may appear from the user of my program. For example, I have an triangle area program in wich I ask the user of the program to insert the length of the base and height of the triangle in a textbox. But what if he inserts a letter or something else, like a sign....my program will crash...
I know that one method would be to use On Error GoTo but I don't know how. If maybe you can direct me to some link or you could explain how do I handle errors, I would be grateful. Maybe you can even show me other ways to avoid errors from the user input.
This is my small program so far:
Private Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs)
Handles Button1.Click
Dim , Height, ARIA As Integer
[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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Jun 23, 2010
How do i file download asynchronously in WPF vb.net?
Is there a timer control in WPF?
I am using vs2010 Pro
I need to write an app that downloads a file, uncompresses it, scroll through it and update sql table. Also print labels and invoices.
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Oct 23, 2009
Imports System.Net
Public Class DownloadStuff
Dim downloader As New WebClient()
[code].....
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Nov 23, 2010
I 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 .
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Feb 27, 2012
We recently started playing with a vb.net 2008 WebClient on a Windows 7/64 workstation to download files from a web site to the local machine.It works except that we cannot detect if the URL is invalid. It doesn't throw an error. If we use Async it does trigger the Download Complete event but there was no file since the URL was incorrect.Is there a way to detect an incorrect URL?I also noticed that the events does not give you either the URL or the file?
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Dec 24, 2011
I am wanting to create an application that will monitor the upload/download traffic of a user. Can someone point me too some code that I can have a look at?I have found SharpPcap - A Packet Capture Framework for .NET, but cannot find any vb.net code for it.
I have found this code:
Dim Properties As IPGlobalProperties
Dim StatV4 As IPGlobalStatistics
Properties = IPGlobalProperties.GetIPGlobalProperties
StatV4 = Properties.GetIPv4GlobalStatistics
Dim Packets As Long = StatV4.ReceivedPackets
What actually is a 'packet'? Can I calculate the download/upload from this code by maybe multiplying the recievedPackets by packet size... or something like that?
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Aug 5, 2009
I currently have a program that allows users to download files into a folder of there choice. I currently have 10 different forms all with a text box to show folder location and a browse button for user to find it, but what I want to do is create a form that will appear at the start where the end user can enter the folder location so that they don't have to enter the folder path for every download they want to do. How would I go about doing this I have a textbox, browse button and an OK button but have no idea what to do next.
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Mar 31, 2011
how can I calculate the download speed if I use a webclient to download files async?
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Dec 3, 2009
How would I make the Progress Bars Value = The Percentage of a file being downloaded using a Webclient?
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Jul 28, 2011
Trying to imitate a Messagebox - in that, a sub will not continue until the user "deals with" the pop up.
For example, in a sub, I want a Form to pop up, and ask a user a question, and give them 3 options. I want to make it so the user must click an option, and then the sub that called it can carry on it's way.
I believe I need a function to make this happen.
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Dec 4, 2007
I've been trying for a while to use a method I've found on the net to login to a webpage then download zip files off the page.Here is what I am doing:
Code:
strURL = "https://www.someurl.com/"
Client = New WebClient()
[code].....
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Nov 14, 2011
I have a desktop application from where i want to download files from the web server. when i am downloading a single file then there is no problem. but when i want to download more than one file there is an error like "WebClient does not support concurrent I/O operations".
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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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Jul 15, 2009
I have a weird bug with webclient. I made an app a while ago which uses webclient to download a small thumbnail image.. and I rememeber when I first made it, the first time webclient was used to download the image it always took 15 sec+ to download it, but after the first it always downloaded quickly (in like 1 sec) .. but then the problem went away for me and it always downloaded fine.but now someone else who uses my app is having the slow image download problem apparently around 50% of the time it downloads the thumbnail images. so does anyone know what might be causing this? As I said, I don't have the problem any more on my comp - but I don't know why :s
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Aug 9, 2011
I am trying to download a 163 KB jpg file from the web with Webclient. The dimensions of it are ~332 x 491 pixels.
[Code]...
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May 27, 2011
How to create a console application which would read input from user and assign the input to a variable? The problem is, I need to enter several words on one line separated with blank spaces like "ab cd efg" and then assign ab to one variable, cd to another variable and efg to another variable. Also the entered words can be any lenght.
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Dec 8, 2009
how to create a form that allows a user to load an input file? I'm assuming a form like a windows explorer window will be too difficult, or not? If it is then I guess I could just put a textbox on the form and ask the user to input the directory with file name.
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May 23, 2010
E.g The user enters data into txtName, what i then want to do is make a text box with the data entered into txtName
So if the User enters Daniel into txtName, then a txt File is created called "Daniel.txt"
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Sep 2, 2011
I have a bit of code that jumps around a few domains and adds a user to each of them. This follow is a piece of code I had to write to get around the issue of the .add and .invoke being ran asynchronously and occasionally causing errors.
It connects to the domain in question, passing a "CN" from the code in as a search filter but receives a COMException which is normally a LDAP sting config issue. The connection string in this is fine so I am not sure why it is having such a hard time.
Function GetUser(ByVal UserId As String) As DirectoryEntry
Dim objRootEntry As New DirectoryEntry
objRootEntry.Path = "LDAP://DC=SERVER,DC=LOCAL"[code]....
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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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Jun 10, 2011
How to download multiple files with a wildcard pattern using webclient DownloadFile? Like project* from [URL]..
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Sep 15, 2009
I am trying to create a function to remove dirty words from user input text and want to replace those dirty words with four ****. In my scenario , i have list of dirty words where i would iterate the input user text and want to replace. Say for example.,
Dim InputTxt As String = "hi bush how are you.... $hit and @ss"
Dim OutPut As String = " hi **** how are you... **** and ****";
Problem: It works fine to replace some word like " bush" however fails in the below function doesn't replace "$hit" and "@ss".
Note: I do not want to use string.Replace because it doesn't have word boundary in the sentence..
Public Function pReplaceWords(ByVal dirtyWord As String, ByVal inputText As String, ByVal options As RegexOptions) As String
Try
[Code]....
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Aug 17, 2010
I want to create one help file for my whole application. and once user press help button next to any input control then appropriate help topic from file should get display. how can i create this functionality in vb.net?
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Nov 20, 2011
Using the Visual basic browser I would simply, at least for the input of information.
If WebBrowser1.Document.GetElementById("Input") Is Nothing Then
Else
Dim txt As HtmlElement = WebBrowser1.Document.GetElementById("Input")[code]....
But in the case of WebClient class, How do I do this ?As I have been told this is so much faster.
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May 31, 2009
How do I make it so that when the user clicks on a download link, the download dialog is surpressed?
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Jun 1, 2012
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]...
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Nov 23, 2009
Ok, I'm not sure how to explain this, but I'll give it my best shot.I want my console application to be able to do one function I have when you click one option on the windows context menu, and another function when you click another option.
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