use a If then Statement with Httpwebrequest? Let me explain my senario. I have a file that needs to be downloaded from a web site once it is posted. Currently one of our staff manually goes out to the web site multiple times to check to see if the file has been posted, they then download the file, extract it's contents and use some of the info for reports that must be sent out the same day.
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how to write a httpwebrequest, however i'm unsure of how to write it with a if...statement. I have a file that I need to download, however it ususally doesn't get posted until sometime Tuesday afternoon, so what I need to do is have the program continually check say once about every 5 minutes until the file has been posted and then download it.I'm presumming using an if...statement is the best way to accomplish this, basically if true(file exists) then proceed, else wait 5 minutes and rerun process.
View 7 RepliesWhat I would like to know is how to obtain form input elements during an httpwebrequest?
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Is it possible to obtain these input elements during an httpwebrequest without having to view the html code?
See
Public Class Form1
Dim sql As String
Dim conn As New OleDb.OleDbConnection
Dim da As New OleDb.OleDbDataAdapter
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The problem, The INSERT statement works fine in the form load but not in the button click event?
I was convinced that If <expression> Then <statement [:statement]> Else [statements] in concrete form of If a = b Then SayHello() Else SayBye() End has sense. I read article on msdn on If-then-else, but I forgot why I was reading, so I concluded, that snippet above means this
If a = b Then HelloIsSaid : IsNotEnded Else ByeIsSaid : IsEnded But I have tested it now, and I see, that Else without statement is nothing more than decoration. It would be pretty good if it had function I described. Do you think its good request? Or do you know any circumstance where this Else has some function?
y friend and I are re-learning Visual Basic, and we are stumped on this bit of code.
For intAsterisks As Integer = 0 To intLine - 1
lblAsterisks.Text = lblAsterisks.Text + "*"
Next
I have the following SQL:
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I want to put it (the select count statement) in this LINQ statement so I can get the sales count in my linq statement: Dim TheLeads = (From L In DB.Leads Where L.IsDeleted = False Select L).ToList() Is this possible to do in LINQ?
add an if statement and an exit statement to my do loop that exits when my future value (FV) is greater than 1000, then to change the exit statement to a continue statement so my loop will continue even though my fv is greater then 1000, point is to get this to run even though my if statement doesnt do anything. problem something wrong in my code and an exception error (xception of type 'System.OverflowException' occurred in mscorlib.dll)
so can someone show me where or why I have an error is, what am I overthinking now! I could use a hint, OMG i could use a tutor for that matter
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A co-worker wants to convert the following IfThenElseIf statement into a Select Case statement.
Explain why this is not possible.
If temperature = 100 Then
X = 0
ElseIf population > 1000 Then
X = 1
ElseIf rate < .1 Then
X = -1
End If
I cant get this SQL statement to insert any of the values in the form to add to the database
sql
sql = "INSERT INTO prevresults (ExamDate, ExamTime, CorrectAnswers, PassPercentage) VALUES (date.now, time.now, rightanswers, percentage.text)"
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I have no idea how to use httpwebrequest anyone can show me an example of code to do the following
1.Navigate to website with cookies
2.use this cookies and website referrer to download file with direct url (url...)
I am facing a strange problem with listbox. I need to scrab whois information. I used the following code to get source code of the whois query. It works fine if I use a textbox. But I need to use this for multiple url and therefore need to use lixtbox to loop through url list. Unfortunately when I use listbox1.selecteditem or listbox1.text it does not work. But this same code works with webbrowser.
Dim request As System.Net.HttpWebRequest = System.Net.HttpWebRequest.Create("http://www.networksolutions.com/whois/results.jsp?domain=" & listbox1.selecteditem)
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.3705)"
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I'm building this class to download files in parts/sections/segments. In .NET 4.0, I can use this code to specify the range to download from
long startPos = int.MaxValue+1;
HttpWebRequest.AddRange(startPos);
and it works because there is a long overload for the AddRange method. When I looked up the .NET 3.5 version, I realised the AddRange() method allows using int only. The possible workaround would be using the AddRange(string, int) or AddRange(string, int, int) methods. Since the class will have to work in .NET 3.5, I'll have to go with the string specification but unfortunately I can't seem to find any sample code that shows how to specify ranges using this procedure in .NET 3.5. Can anyone show be how to do this?As the first code sample I wrote shows, I would like to specify a range of type long instead of int. Using type int allows requesting for byte ranges only up to 2GB but long allows requesting for byte ranges beyong 2GB.
The question therefore is: How do I specify byte ranges of 2GB or higher on HttpWebRequest in .NET 3.5?
Here is my code:
Code:
Public Function getHtml(ByVal url As String) As String
dim objrequest as httpwebrequest
dim objresponse as httpwebresponse
Try
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My problem is: for some url that function takes a long time. So, i just want to cancel the response after a given time. I tried with a timer control but that is not working. What to do? How to modify this code so this function will return result within a given time whether httpwebresponse completed or not?
i allways get an Out of Mem Exception and the usage of my memory is growing and growing in the taskmanager when i execute follwowing source code:
Imports System.Net
Imports System.Text
Imports System.IO
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How to successfully log into a DSL-Router (Model: Speedport w504v Type A).I wrote a function usinig HttpWebRequest and HttpWebResponse. So far this function is not finished and is only for finding out the right login process.[cde]...
View 1 Repliescan any one see any thing wrong with my code. I swear it did work once or twice. * code now removed as updated below
View 2 RepliesI am trying to write a program that goes to a webpage and gets the html and puts it into a mshtml document but I always get an error. I know this example works when the webpage doesn't require Credentials. By the way i'm using vb 2008 express.
Dim theCredential As New System.Net.NetworkCredential("username", "password")
Dim Doc As mshtml.IHTMLDocument2
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I'm pretty sure that I need to use Httpwebrequest "POST" method for this although Im unsure as to the exact syntax to use. I need to do a xml query to a remote web site, something like <node>" "</node, <price>" "</price> and then collect that data and import it directly into a sql table. Any suggestions or directions?
View 4 RepliesReturn statement which is true in an if statement
View 3 RepliesI have a program that will register you for a certain website using textboxes and stuff but I have an invisible web browser and it just enters the text into the right spots and clicks the button.I was told that I can get rid of the web browser and do the whole thing faster and easier using "HttpWebRequest and HttpWebResponse".
View 2 RepliesDim s As HttpWebRequest
Dim username= "username=" + HttpUtility.UrlEncode("username")
Dim message = "message=" + HttpUtility.UrlEncode("message")
Dim sep = "&"
Dim sb As New StringBuilder()
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How do i reponse.write the result to the screen? I get errors like..Value of type 'System.Net.WebResponse' cannot be converted to 'String'.
I have created a httpwebrequest connection to a streaming API after trying a tTCPClient which just never ended up working. My concern is whether my code is correct and that I am actually reading in new data and that the connection is maintained. Initially I had been reading into a buffer and just loaded everything into a file after max size, but figured it would be simpler to read a line, since each entry was being sent delimited by line feeds.
rStream = webrequest.GetResponse().GetResponseStream
rStream = New GZipStream(rStream, CompressionMode.Decompress)
If rStream.CanRead then
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It looks like I am continuously reading and not sure if I am reading redundant data here. Also another question is that if I were to use a thread to appendToFile, would that maintain the connection to the stream?
I have a problem when trying to send a POST request. The sending method looks like this:
Public Sub SendXML(ByVal file As String)
Dim reader As New StreamReader(file)
Dim data As String = reader.ReadToEnd()
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Now looking at this I suspected that it was due to the fact that the server does not accept POST messages. But some other reading suggests that the the URI [URL] has been generated with a proxy and should be /Request so the line should read POST /Request HTTP/1.1
So what would be the common reason for this? And if it is a proxy problem, how is it sorted?
As asked below, I have created a new question for the more specific request. Changing absolute URI to relative in HTTP POST header
I am a newb to vb.net(visual studio 2008).i am trying to make an app using vb.net which can be used to login to a website and browse that website without using webbrowser(i dont want to use webbrowser of vb.net).i got a code for this from net ;I have made a temporary login webpage using php and mysql in my computer(its working properly).[code]...
View 2 Repliesdifferences between HttpWebRequest and WebClient and why I should use either.
View 1 RepliesI want to download a file using an HTTPWebRequest. I found sample code, but it seems a bit outdated. What i have:
Imports System.IO
Imports System.Net
Imports System.Text[code].....
It seems that WebRequestFactory doesn't exist. Is there a better way to do this? Or how can i fix it?
I noticed that HttpWebRequest freezes the UI while it's waiting for a web page to be downloaded:
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If someone's done this before, what is a good way to keep the application responsive?
Is there any way to download only a part of a web-page? What I have is a program that downloads periodically (every 5 sec) a web-page and displays some real time information. So I would like to minimize the bandwidth as much as posible.
I have seen that many download managers have the ability to resume a download, so they actually have the ability to start from somwhere in the midle. So can I do that with a single web-page and without messing with the sockets if posible?
I understand the basics of httpwebrequest and I'm not looking for any answers on web browsers. My previous method was done using webbrowsers but because of the lack of speed I have transferred over to httpwebrequest to speed up the process.
I have an id of an element that I would like to grab and use in an httpwebrequest but not sure where I would start with that.