C# - WebClient.DownloadString() Not Producing Exact HTML
May 20, 2010
So here's the deal. I'm creating a spider bot for a website that scans all the product pages and records the product data. I'm using C# and the WebClient library to download the HTML string. The site I'm crawling must be specially made because the HTML that is received from WebClient.DownloadString() is different than the HTML that I get when I view the source of the HTML when visiting it on a browser. This seems intentional because the only info I can't get is the price.
I'm using WebClient.DownloadString("http://www.website.com/Default.aspx?fltdte=01050402);Part of data that is returned I want to put again in above url for query again and again if data returned satisfy conditions..I want to do multiple webClient.DownloadString.How to do that?
I have an issue with some content that we are downloading from the web for a screen scraping tool that I am building.in the code below, the string returned from the web client download string method returns some odd characters for the source download for a few (not all) web sites.I have recently added http headers as below. Previously the same code was called without the headers to the same effect. I have not tried variations on the 'Accept-Charset' header, I don't know much about text encoding other than the basics.The charachters, or character sequences that I refer to are:
"" and "Â"
These characters are not seen when you use "view source" in a web browser. What could be causing this and how can I rectify the problem?
string urlData = String.Empty; WebClient wc = new WebClient(); // Add headers to impersonate a web browser. Some web sites // will not respond correctly without these headers wc.Headers.Add("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12"); wc.Headers.Add("Accept", "*/*"); wc.Headers.Add("Accept-Language", "en-gb,en;q=0.5"); wc.Headers.Add("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.7"); urlData = wc.DownloadString(uri);
I'm sending a large text string in the form of a byte array using the WebClient.UploadData method to a web site but I'm not sure exactly where to retrieve that data from on the server. I've read posts that say it is in the request object which I already know but how exactly do I retrieve the specific byte array I sent like in the following c# pseudo code:
I understand that it may not be as simple as this and that I may need to do some other processing but can anyone post a code snippet that shows how I can get at the byte array that was sent?
CI have been producing a registration form using html and asp. I have managed to get it to send an email having copied script from a previous website which someone developed for me. I now get the response going to the old address and with then old text. How can I change it all to the new site?
if there is anyway that I could duplicate controls in a asp.net pages. So for example, currently for one of my pages, I have a panel at the top of the page with alot of controls in them ( eg next/previous buttons, labels, trees, etc). However I wanted to add the exact duplicate of this panel on the bottom of the page aswell, with exact functionality.
I'm mix up between webclient.OpenReadAsync and webclient.DownloadStringAsync? Can anyone explain clearly for me ? What are the difference between them? In addition, may i know whether webclient.OpenReadAsync got download the file or just open and read the file only without download to other places?
I have a datatable which has been dynamically generated from FoxPro tables using a UNION Select statement. e.g.
SELECT * FROM x UNION SELECT * FROM y UNION SELECT * FROM Z ORDER By v_alue1
This produces a datatable with about 100 rows, each containing many fields, one of which is c_olor. From this datatable, I would like to select the distinct colors and then output in a dropdown.
I have a public class Color which just has one property which I can then use as the DataTextField and DataValueField for the dropdownlist
[code]...
However this never results in the distinct colors.
I have searched and searched for what I am looking for, and this seems to be one of the methods to produce a distinct set of results, but this and the others do not work.
My reasoning behind getting the colors this way, is that I need to get various other distinct values from the same UNION SELECT datasource, so would just do one DB call, cache the results, and then just used this cached datasource to retrieve all my distinct values.
i am developing a web site in which i need keyboard handling. My code for keyboard handling is working properly, but the problem is this, it produce same ASCII code for small and capital alphabets. For example when I execute my web site and press "A" without Caps-Lock it produce 65 ASCII code which is actually code of capital "A", But logically it has to produce "97" code of small "a"..
I am not sure what you call it in other technologies, on the IBM i (or iSeries) we call it overlays. The overlay is an image of a form that is stored on the server then a program generates the form with fields from the database so you can eliminate preprinted forms.
I had a problem last year with the method I was trying at the time. It was a rush job at the time to be revisited at a later point. The work-around at the time was to export to PDF. So now it is "later" and once again is a rush (imagine that). This is all done through a web-based interface.
So how do you generate forms from something that was once a preprinted form? What method do you recommend? This is a legal form and must be filled out a certain way and can have many in a batch (up to 50 or so). I would prefer to not have them print one page at a time.
I have a website created using ASP.Net 3.5, C#, VS 2008. It's URL is [URL] and it has SSL certificate installed. My default page is welcome.aspx.
Now anyone types the URL [URL]in address bar it will be redirected to[URL]But I don't want to show the welcome.aspx in the address bar URL. Just I need only [URL] .
After some changes in web.config now IIS allows characters like ":" in URL but it makes some modifications. For example:
http://localhost/a///b => http://localhost/a/b (remove all slashes but one) http://localhost/a => http://localhost/a/b (changes backslash with slash) ... I want URL string from within a HttpHandler (I use Request.RawUrl) as it is without any change.
I have sesssion time out issue. Mine is a very big application and 10 yrs old application, so I m unable to figure it out. I have these timeouts in my web.config file. Session is getting expired in 2-3 min or sometimes I m unable to figure the exact time. Here is my timeout sessions in web.config file
I want to upload an XML file and after that i've to load it by using XMLDocument and do some changes, then save XML file back to same location where actually l uploaded. But whenever i'm loading XML file and written code for finding path is like..
string path=Path.GetFullPath(FileUpload1.FileName); but it return path like.. "C:\Users\nagaraju\VegaFIXSettings.xml" but actually i'm uploading XML file from D:\VegaFIXSettings.xml
how to get actual path when uploading file by using FileUploadControl.
n a grid view I have a column named REQUIRED which has a value of either 0 or 1.I added a checkbox templated field to show the above as checked or unchecked instead of0 or 1. I decoded the value Y or N to 1 or 1 in the sqldatasource
When I tried to add the following "Checked='<%# Eval("BOARD") %>' it does not like it and gives an error.How do accomplish the same for the above checkbox field and the exact syntax to be used
What I need: column display: users Rows display : months and days.
On clicking cell will open a popup
In popup we can : - select a status in a dropdownList, - if the status is "be close" => two calendars ( date start and end) - then apply a color for the selected period.
I know I would not find an exact need control, but I want a component that would be closest. Somethink like [URL]
I started a website based on the NerdDinner source code, everything worked fine (more or less) but whenever I post an event, it ends up on the exact same coordinates on the map regardless of the address (Somewhere in the Gulf of Guinea!)
No idea what to do: I didn't alter the map code at all!
this page I will be calling from a variety of pages. Is there some way of knowing from which page my form was submitted? I was thinking something along the lines of writing:
How can I find the exact phrase or word in linq sql format? that what I did:
string sWebsiteSearch = "hello"; DataSet1.HtmlModuleRow row = (from f in table where f.HtmlContent.Contains(sWebsiteSearch) select f).Single();
It worked, but when I change the search string to "h" (one letter only) it works also. How can I restrict the search to exact whole phrase or whole word only?
I have a datagridview control that I'm using to display cache data to the end used on a web form. The issue that I'm having is that every time I re-run the application, and the cache data is re-generated... it loads duplicate data that's being displayed to the end user. I can't seem to figure out how to keep this from happening.
What I would like to have happen is that only unique data rows be returned and cached for the end user. Unless there are new data rows on the database that needs to be included in the cache data results...the previous data results should not be duplicated. I've tried to change a few properties on the datagridview control, but nothing seem to keep this from happening.
