Images Don't Show In Response Of HttpWebResponse
Jan 5, 2012
I am stuck in showing images of a requested webpage using Httpwebrequest/httpwebresponse (VB.net) classes. I can make calls to get the target webpage and display the result but it doens't show the images.
What I come to know through googling, is one way to add <base href="target webpage url"> tag in <head> section of resultant strings received through httpwebresponse and the display the modified result. For this purpose someone suggested me using Html Agility Pack.
I did some job but couldn't complete. my code snippet is as under
Dim HWR As HttpWebRequest = TryCast(WebRequest.Create("http://www.example.com"), HttpWebRequest)
Dim RequestWriter As New StreamWriter(HWR.GetRequestStream())
[Code].....
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Mar 8, 2011
i am getting error 401 un authozied, but i am giving correct user name and password of the network user name and password of my system.
i am getting error in this line
HttpWebResponse
loWebResponse = (HttpWebResponse)loHttp.GetResponse();
[code]....
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Aug 26, 2009
I am writing a program that shows random images in three picture boxes. When I open the program the initial images are in the picture boxes. When I click stop, the program is supposed to select a random image out of five. in each picture box. However, when I click start the images go away and when I click stop, no images appear. There is also a message that is supposed to come up on the screen, which it does. I just can't get the images to show. I am using Visual Basic 2005.
My code is below:
Public
Class videoBonanzaForm
Private images() = {image1, image2, image3, image4, image5}
Private image1 As Image = Image.FromFile("sevenpounds.gif")
Private image2 As Image = Image.FromFile("push.gif")
[Code] ......
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Dec 29, 2011
How do I use a ObjectListView to show all the images in a image-list ? In the home-site of ObjectListView they have shown how to do this in C# (I am not that good with c# and delegates). But I can't get it to work in VB.net.
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May 19, 2012
I am using a DataGrid, in VB, I have a check box. If it is checked I turn image.visible to true. This is done within the ItemDataBound method. How can I get it so when the check box status is changed, the DataGrid is rebound and uses the if statement to decide whether to show the images or not? [code]...
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May 24, 2009
Is there a simple way to show multiple images on a form?
(Somting like this?
-> Movie (American Gangster) = Picture 1
-> Movie (American Pie) = Picture 2
the data must be variable....
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Apr 1, 2010
I have a web browser on the form, kids can use it to browse sites. sometimes, on some sites, I want to filter some images (or just show some images), is it possible to do this? or, have to go low level to filter images?
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Dec 2, 2011
I'm having difficulty with an assignment for my class. I need to have certain images show up depending on which text is input in the text box. This is the code I have, but I can't figure out how to get it to work properly.
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtSales.TextChanged
txtSales.Text = "Devin Thomas"
PictureBox1.Image = System.Drawing.Image.FromFile _
[code]....
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Apr 19, 2011
In a VB.NET winform App I want to place icons on each tab header of a TabControl.I set the ImageList property of the TabControl and for each Tab I set the ImageKey property.My icons show as expected on each tab at design time within the IDE but when I run the App, my icons don't show (an empty space is shown instead).
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Oct 25, 2009
I am trying to setup a treeview control to display all drives and folders on the PC. So far I can display all drives and folders but the images will not show except rarely. I am using an imagelist with 4 images (index 0-3). The code below is used to load the drives in the treeview control. I have tried using every type of image possible from bmp to png and nothing. I have tried the Appllication.EnableVisualStyles() which I now know isn't needed in vs 2008. I am also having problems with a picturebox in another form that shows nothing but a shadow of the image. I suspect this may be a setting somewhere maybe in vs 2008 but am not able to find one.
Treeview
Dim drive As Integer = 0, dir As Integer = 0
For drive = 0 To oDrives.Length - 1
[code]....
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Jul 18, 2009
i'm making an app which uses a webbrowser control to show some offline (not cache) html pages like a slide show. let's say pages in a folder on the desktop etc when it came to testing the whole thing, i figured out that the images in the html are not visible on the webbrowser control. instead there is a space where the image should be, corresponding the actual image dimensions.and when i right click on this empty space where images should be, and click on properties, i see the image size given as -1 byte (minus 1 byte) and there is no image type.
however given any online url's to the same webbrowser control or opening the same html pages with the real internet explorer i got no problem and see the images.i've been googling for almost 10 hours for a solution without success, so any hints are welcome. used vb 2008, .net framework 3.5, ie 7.
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May 24, 2009
Which of the VB controls is best suited to show images in a strip like fashion from an Image Array?I have an Image Array. I would like to display the images in the array to the end-user in a control.The control should should apear like a scrollabel list. I guess something like silverlight does.When the user sees and selects an image he/she wants to view, it is selected by clicking on the thumbnail and appears in a picturebox.
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Jun 5, 2010
I am having trouble with receiving bytes using HttpWebResponse.I can receive them just fine with WebClient, which I believe is just a wrapper for HttpWebResponse.Anyway, I put together some example code to re-create the situation. [code] If you just paste it into a empty Form1 and hit F5, it will create all controls automatically.I would use WebClient, but I want to get one byte at a time so I can have a detailed progress indicator, and I couldn't find any way to do that with WebClient.WebClient SendDataAsync has some serious problems where it only fires its progress update events like 3 times.Also, you will see if you press the button, it takes like 20 seconds of doing absolutely nothing, and then all of a sudden it downloads all the data in like a split second.If you press the button again and again, it only takes a split second.But the first time you push it, it takes for ever.Does anyone know why and how to fix that? [code] for the sake of all that is good and holy, don't use ACCESS, EXCEL, or a TEXT FILE as a database.If you want your program to use a "local database", without any of the hassle of setting up a MS SQL or MySQL server, just click this link: >>> SQLite <<<
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Apr 6, 2010
I 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".
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Dec 19, 2011
what method should I be using to obtain all the form input elements during an httpwebresponse?I know that posting back to them can be done via editing the response using textbox1.text...but how can I obtain the input values during my request without having to manually go behind the scenes and peek at the html code?
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Jan 6, 2011
I`m working on some XML Https shit things and since i`m getting some Cyrillic characters i need to change the encoding of the HttpWebResponse since i`m only getting "?" i try this:
Dim objResponse As HttpWebResponse = DirectCast(objRequest.GetResponse(), HttpWebResponse)
Try
SR = New StreamReader(objResponse.GetResponseStream())
[code].....
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Jan 26, 2010
I want to read a string that looks exactly like this:
VPSProtocol=2.22
Status=OK
StatusDetail=0000 : The Authorisation was Successful.
[code].....
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Mar 11, 2008
I have a problem to read the binary from HttpWebResponse. The problem occur when the data is less than the buffer i predifine. It will hang in a long time when stream.Read(buffer, 0, buffer.Length) in ReadFully function.
Here is the sample code
Public Sub GetData()
Dim Buffer(1024) As Byte
Dim sHttpData As String
[Code].....
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Nov 12, 2010
Why images of asp.net toggle button created with checkbox doesn't show inside updatepanel in webusercontrol ?
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Sep 20, 2011
I'm currently working on making a database driven app without using SQL and instead using a simplistic web directory to store information.Unfortunately after just beginning I hit a rock wall on creating a login screen. As it works right now, every user has a directory and within that directory is file called "access" which has a password. While I'm aware that's it not secure, that's later to come, but right now I'd just like it to work. But the program uses WebRequest to see whether or not there is a directory under the given username, if there is then the username is considered valid and it moves on to check the password- where I start to have trouble. The password verification uses WebRequest and WebResponse as well, using StreamReader to read the access file. At the moment, the password checker only works once in a single program instance. Otherwise trying to check another login will cause the program to hang or freeze when declaring the WebResponse variable (resp).
This is the password verification code (with URL's removed):
Dim Username As String = My.Settings.usrUsername'The function is in a BackgroundWorker so I use My.Settings to communicate with the UI.
Dim Password As String
Dim usrPassword As String = My.Settings.usrPassword
[code]....
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May 27, 2010
Looking for the best way to determine if a URI exists in VB.NET without downloading the actual content. System.IO.FileExists/My.Computer.FileSystem.FileExists can be used locally to determine if a file exists, is there an equivalent for the Web?
Currently I am using a HttpWebRequest to check URI existance using the ResponseStream. This populates the stream if the target does exist and throws an exception if it doesn't. The function is being expanded to also check for PDF files (typically 5MB +), images, etc and it will be a waste of time/bandwidth to actually populate the content into a stream.
In the case of "Success" (the target does exist) I do not wish to download the file or page, simply to end up with a Boolean which indicates the whether something exists at the end of this URI.
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Dec 13, 2010
I tried using suggestions from other posts for this and still no resolution. When sending a POST request, at times it will just begin to freeze and stall. I set up my code as follows and now basically if I cannot figure out why it is freezing, then itneeds to timeout, handle the exception and restart the function.
For i As Integer = 0 To searchItems.Count - 1
If uri.Scheme = uri.UriSchemeHttps Then
Dim request As HttpWebRequest = HttpWebRequest.Create(url)
[code].....
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Apr 15, 2012
I am trying to Make a Simple Login System using files
Dim response As System.Net.HttpWebResponse = request.GetResponse()
If response.StatusCode = HttpStatusCode.NotFound Then
MsgBox("Invalid Login")
Else
My Code Here
But When I Debug it, and test it, it still gives me the 404 error. and not the popup.
Here is My Code
Try
Dim response As HttpWebResponse = request.GetResponse()
MessageBox.Show("Allgood")
Catch ex As WebException
[Code] .....
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Dec 22, 2010
I have been used getelmentbyid in past in vb6 using webbrowser control and internetexplorer instance But in vb.net i tried to fetch webpge using the httpwebresponse Which gives the html / source in the form of sting Is it possible to fetching data by getelementbyid using httpwebresponse and httpwebrequest method ?
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Apr 21, 2010
i made a tcp/ip application using the .NET TcpListener class, my problem is that sometimes (about 30 / 4000) the connection between the client and the server got interrupted in the middle and the server response to the client is lost.is there a way to know if the server response was successfully sent to the client without the client response back?
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Jun 14, 2010
Trying to POST a username & password to my PHP script at www.example.com/web-service.php which gets that info and echos true or false.
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Connect to web-service
Dim hwrRequest As HttpWebRequest = HttpWebRequest.Create("http://www.example.com/web-service.php")
[code]....
Am I missing anything? It stops and throws that error on the line that calls GetResponse()?
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Jun 4, 2011
The idea is to scan a folder of images and then let the user navigate back and forth through the images using a couple of buttons.The problem is, I can only get it to return a single image, and not the whole lot. It's looks to me as though the images are getting assigned to the same index in the array. [code]
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Oct 3, 2010
What type of connector do i need to actually save the Map data like point of the images (x,y coordinate) into the database . and then retrieve it to show on the page in asp.net and how do i go about doing it.
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Feb 11, 2009
The app i am working on is for creating theme for the iPod touch... It has to deal with LOTS of images (100's potentially) There will be the set of default images, and then the user created replacement images. I started loading all the defaults into a resx file... thinking then I could just pull them out. now that I started setting the default, this sucks! lol the app will do this, on load it will set all the images (variables) to the resx images then when a theme is loaded, it will replace the default with the user image (if the user img exists) otherwise, the default stays. Then the "screen" is drawn to show the user. so, here is just the images to build the wallpaper, dock, and status bar...
[Code]...
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Aug 12, 2010
I was thinking to make an app to save images [or download images] to local hard disk. But to keep it easy, I want this app to create a small picturebox on form to show the thumbnail of downloaded image. Lets say a 5 pictureboxes has to be added with the thumbnails to show the recent downloads. A user can save the location where he wants to save the files on hard disk. A listbox or a dropdown menu will help in categorizing the images, like image1 in friends section, image2 in family section, image3 in others, etc... When the program restarts all the latest 5 thumbnails has to be loaded in pictureboxes and the directory that was chosen. Finally, a button that shows the downloaded images into original image file size one by one or a slide show. Is it possible to make such program?
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