System.net.webclient.downloaddata - Data in label1 Is Not Returned?
Nov 18, 2010
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].....
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 =
I want to make a download Manager with resume capability (dont refer me to codeproject examples which use httpwebrequest and webresponse classes) i want to make the use of system.net.webclient class. I know it can provide me with events and stuff but is it possible to resume our downlaods with this class ?
I'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'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?
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.
Is it possible to send HTTP POST with some form data with System.Net.WebClient?If not, is there another library like WebClient that can do HTTP POST? I know I can use System.Net.HttpWebRequest, but I'm looking for something that is not as verbose.
Hopefully it will look like this: Using client As New TheHTTPLib client.FormData("parm1") = "somevalue"
I've been using an invisible WebBrowser control to submit a form on my server, but I'd like to use System.Net.WebClient() to accomplish this so I don't have the control hanging around on my form.I need to get the page, fill out the username and password fields, and click the submit button. This was done easily enough with the WebBrowser control, but I can't find any examples using System.Net.WebClient().
I have 2 forms on the first form i have a label with a number in it.When i click a button on the first form this label changes and i also want to change the text property of a label on another form that may or may not be visible.Why does:Form2.Label1.Text = me.Label1.text Not work?
I need to parse a Unix text file so, I am using System.Net.WebClient to ftp into a Unix server then using the .DownloadFile() method to get the text file, but its coming in with the Unix end line ""; so is there a way to convert that to windows format while doing the DownloadFile method? I do re-read it after and fix it, I am just looking for a better way.
Or is there an alternate such as instead of a DownloadFile, and the two other steps above can I just read it into an array right off the Unix server?? If so then what method would I use?
I am getting an error with this Dim Web As New WebClient Web.Proxy = "69.196.16.237:62159" It says runtime errors may occur when converting string to System.Net.IWebProxy What does that mean?
It is working with vb6 but when I used vb.net 2008 it is not working Private Declare Function GetComputerName Lib "kernel32" _ Alias "GetComputerNameA" (ByVal lpBuffer As String, ByVal nSize As _ Long) As Long Public Function ComputerName() As String Dim sBuffer As String [Code] .....
I've spent a substantial amount of time trying to figure this out, but I keep getting the same error
A first chance exception of type 'System.Data.OleDb.OleDbException' occurred in System.Data.dll A first chance exception of type 'System.NullReferenceException' occurred in project1.exe
This happens when I try to use the DataReader.my code is
Public Function Identification() As List(Of Integer) Dim returnIndex As New List(Of Integer) Dim dbCount As String = "SELECT Bookingid FROM bookdetail WHERE Date =" & getCurrentTimeString() & " 12:00:00 a.m." Dim count As Integer = 0
i am trying to connect to an MS Access database and I am getting an erro message on the following line of
searchtable_command = New SqlClient.SqlCommand(searchtable_string, testsearch_connection) Error:'System.Data.Odbc.OdbcConnection' cannot be converted to 'System.Data.SqlClient.SqlConnection'.
Here my connection string:
Dim testsearch_connection As New Odbc.OdbcConnection("Provider=MSDASQL;Driver={Microsoft Access Driver (*.mdb)};Dbq=C:CesarAccessdatabase.mdb;Uid=admin;Pwd=;")
I've just switched my code over that downloads data as bytes to use a WebClient. I add a header saying I will accept GZip and the site I'm downloading from sends me the data compressed. The problem is, how can I check to make sure it is compressed data before attempting to decompress it? It was much simpler when I was using a Web Request to check the response headers, but I'm having a little trouble checking the reponse headers with a WebClient. Does anybody out there accept compression with a WebClient?
I have a asp.net page that has several SqlDataSources defined that feed data into some graphs. The problem is that the graph product does not handle "no data" very well, and throws an error. I'd like this to handle the situation more gracefully-- so I need to check whether the SqlDataSource returned data or now before rendering the graph (and if not, just post a message saying "No Data" or something).
Is there an easy way to check if the data source returned data, and do this if/then without a bunch of code behind?
I am inserting a record in an SQL table and trying to get the record ID back so I can use it to insert subsequent/related records in another SQL table. I am missing something but have no idea what. Code is below.
I'm sure im just making a simple mistake some place but i just cant find it. I have datatable which I can and can make changes, save back to the database just fine. But if I reload the data after updating, no data is retrieved from the database. But if I stop debugging completely and then start again, it loads just fine...until i call Update.
Here is some code I am using for testing purposes.
Private myDataSet As New DataSet Private conn As MySqlClient.MySqlConnection Dim myDataAdapter As New MySqlClient.MySqlDataAdapter
I 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.
