Apologies if this seems like a duplicate post...
Thomas Warner kindly answeres an earlier post suggesting I use:
Popup.aspx?Data1=Piece_of_data&Data2=Piece_of_data
Just want to ask, if my code is Popup.aspx?Data1=textbox1.text&Data2=textbox2.text
whats the proper way to reference whats in the textboxes?
The way is is above, all that appears in the popup is the actual text 'textbox1.text'
rather than what is actualy in that control.
thanks again
Using asp.net you can litterally write the value straight into the string like:
Popup.aspx?Data1=<%=textbox1.Text%>&Data2=<%=textbox1.Text%>
A more ideal way of doing this would be to build up the URL string in your codebehind so as not to clutter up your HTML and C# code.
That way you could do something like:
String popupUrl = String.Format("Popup.aspx?Data1={0}&Data2={1}",
textbox1.Text,textbox2.Text);
This will also allow you to do any sanitization checks on the values from the textboxes before you start passing those values around.
Related
I am trying to pass this into a custom field called "_vtprd_includeOrExclude"
a:2:{s:23:"includeOrExclude_option";s:11:"includeList";s:29:"includeOrExclude_checked_list";a:2:{i:0;s:2:"1856";i:1;s:4:"1857";}}
I am using WPAllImport to get the data out of an XML package and into the field.
I know that the function works because if I put "bob" in the custom field it goes in without any issue.
What is wrong with this string that is causing it to come up empty?
As always, your feedback and help is greatly appreciated.
The problem was that the data within the string would fail if turned into an array because the string count was incorrect for one of the fields.
The part to look at is at the end.
... a:2:{i:0;s:2:"1856";i:1;s:4:"1857";}}
The offender is i:0;s:2:"1856"
"1856" is 4 string characters long, not to.
So it SHOULD look like this.
i:0;s:4:"1856"
When I made that change I silenced the custom function and it worked just fine.
Perfect example of not knowing enough about how this structure works. So I guess knowing is half the battle.
go joe.
There is this website that we purchase widgets from that provides details for each of their parts on its own webpage. Example: http://www.digikey.ca/product-search/en?lang=en&site=ca&KeyWords=AE9912-ND. I have to find all of their parts that are in our database, and add Manufacturer and Manufacturer Part Number values to their fields.
I was told that there is a way for Visual Basic to access a webpage and extract information. If someone could point me in the right direction on where to start, I'm sure I can figure this out.
Thanks.
How to scrape a website using HTMLAgilityPack (VB.Net)
I agree that htmlagilitypack is the easiest way to accomplish this. It is less error prone than just using Regex. The following will be how I deal with scraping.
After downloading htmlagilitypack*dll, create a new application, add htmlagilitypack via nuget, and reference to it. If you can use Chrome, it will allow you to inspect the page to get information about where your information is located. Right-click on a value you wish to capture and look for the table that it is found in (follow the HTML up a bit).
The following example will extract all the values from that page within the "pricing" table. We need to know the XPath value for the table (this value is used to instruct htmlagilitypack on what to look for) so that the document we create looks for our specific values. This can be achieved by finding whatever structure your values are in and right click copy XPath. From this we get...
//*[#id="pricing"]
Please note that sometimes the XPath you get from Chrome may be rather large. You can often simplify it by finding something unique about the table your values are in. In this example it is "id", but in other situations, it could easily be headings or class or whatever.
This XPath value looks for something with the id equal to pricing, that is our table. When we look further in, we see that our values are within tbody,tr and td tags. HtmlAgilitypack doesn't work well with the tbody so ignore it. Our new XPath is...
//*[#id='pricing']/tr/td
This XPath says look for the pricing id within the page, then look for text within its tr and td tags. Now we add the code...
Dim Web As New HtmlAgilityPack.HtmlWeb
Dim Doc As New HtmlAgilityPack.HtmlDocument
Doc = Web.Load("http://www.digikey.ca/product-search/en?lang=en&site=ca&KeyWords=AE9912-ND")
For Each table As HtmlAgilityPack.HtmlNode In Doc.DocumentNode.SelectNodes("//*[#id='pricing']/tr/td")
Next
To extract the values we simply reference our table value that was created in our loop and it's innertext member.
Dim Web As New HtmlAgilityPack.HtmlWeb
Dim Doc As New HtmlAgilityPack.HtmlDocument
Doc = Web.Load("http://www.digikey.ca/product-search/en?lang=en&site=ca&KeyWords=AE9912-ND")
For Each table As HtmlAgilityPack.HtmlNode In Doc.DocumentNode.SelectNodes("//*[#id='pricing']/tr/td")
MsgBox(table.InnerText)
Next
Now we have message boxes that pop up the values...you can switch the message box for an arraylist to fill or whatever way you wish to store the values. Now simply do the same for whatever other tables you wish to get.
Please note that the Doc variable that was created is reusable, so if you wanted to cycle through a different table in the same page, you do not have to reload the page. This is a good idea especially if you are making many requests, you don't want to slam the website, and if you are automating a large number of scrapes, it puts some time between requests.
Scraping is really that easy. That's is the basic idea. Have fun!
Html Agility Pack is going to be your friend!
What is exactly the Html Agility Pack (HAP)?
This is an agile HTML parser that builds a read/write DOM and supports
plain XPATH or XSLT (you actually don't HAVE to understand XPATH nor
XSLT to use it, don't worry...). It is a .NET code library that allows
you to parse "out of the web" HTML files. The parser is very tolerant
with "real world" malformed HTML. The object model is very similar to
what proposes System.Xml, but for HTML documents (or streams).
Looking at the source of the example page you provided, they are using HTML5 Microdata in their markup. I searched some more on CodePlex and found a microdata parser which may help too: MicroData Parser
I want get the most specific from the current url in visual basic .net.
I've tried several code but it just was the same.
I have this code:
Dim CurrentURL1 As String = Request.Url.PathAndQuery
The code will result like: /FolderName/CurrentUrl.aspx
What I want is, just get the 'CurrentUrl.aspx'.
How to get that?
Have you tried Path.GetFilename ?
http://msdn.microsoft.com/en-us/library/system.io.path.getfilename.aspx
Actually, I think you can use the Uri class, the class is better suited for your needs. It has several properties you can use to get what you want.
http://msdn.microsoft.com/en-us/library/system.uri.aspx
what is the best way of passing querystring to another page, i would definitly avoid like using.......
<a href="Page2.aspx?WONumber=12345">
is there any better way?
i was thinking create a Baseclass with few prop and update the baseclass?
thanks.
It sounds like you want to take the querystring argument, and use it in subsequent pages.
If it's not desirable to pass-forward this querystring argument from your current page, perhaps it's called page1.aspx, without using another querystring parameter, you could:
store the value in Session. Consider Session["WoNumber"] = Request.QueryString["WONumber"].ToString();
store the value in Cookies. You could use something like: Response.Cookies["WoNumber"].Value = Request.QueryString["WONumber"].ToString();
It really depends on where you're getting the value from. You can build a URL using UriBuilder or if it's simple enough string concatenation could be OK (though you'd have to make sure to Server.UrlEncode the values).
If the value is a constant, as your example implies, then there is nothing wrong with putting it directly into a query string, although I would still use a proper named constant, eg.
<a href="Page2.aspx?WONumber=<%= TheMagicOrderNumber %>
with the constant defined in the code-behind:
protected const int TheMagicOrderNumber = 12345
If your objection is the maintainability of "magic string" URLS, and you'd be prepared to use a button instead of an anchor, you could do worse than
<form method="GET" action="Page2.aspx">
<input type="hidden" name="WONumber" value="12345" />
<input type="submit" value="Navigate" />
</form>
this method will generalise to a query string of any complexity with any number of parameters.
There is a great article I came across a few months ago when I was looking for enhanced security with querystrings...
http://devcity.net/Articles/47/1/encrypt_querystring.aspx
It's a very good article, and has a bonus the author offers code examples in C# and VB.NET.
There are times when I prefer to use querystrings over sessions... small number of session objects is ok, but too many and it starts to become a bit tedious to debug problems.
You can encrypt a querystring parameter, if security is your concern.
Or you can use other holders, such s p.cambell says above (session & cookie).
You could also store it in a database, and have the page you go to retrieve it onload.
Just depends on your application requirements.
Another thing I've done is to use <asp:panel>, basically using a single page as though it were multiple pages. In this way, I also have access to viewstate to hold my variables. (Whenever a user clicks 'next', or whatever they would click to goto the next page, I simply hide the panel they're on, and show the panel they want to go to [visible = true/false] property)
Has anyone used jQuery to populate an autocomplete list on a textbox using ASP.NET webforms? If so, can anyone recommend a good method? From my reading so far, it seems like most people are using delimited lists rather than JSON to bring the items back. I'm open to any ideas that will get me up and running rather quickly.
I made a tutorial to do this with asp.net mvc but it should be almost identical for traditional webforms:
http://blogs.msdn.com/joecar/archive/2009/01/08/autocomplete-with-asp-net-mvc-and-jquery.aspx
There are many, many examples on the web. I've used this one before, and if I recall you only need to create an aspx that will return matching terms as a <BR/> separated list:
http://www.dyve.net/jquery/?autocomplete
The documentation shows php in the example, but there's no difference in the way the plugin itself works and I didn't have to do anything special as a result.
From the documentation:
> $("#input_box").autocomplete("my_autocomplete_backend.php");
In the above example, Autocomplete
expects an input element with the id
"input_box" to exist. When a user
starts typing in the input box, the
autocompleter will request
my_autocomplete_backend.php with a GET
parameter named q that contains the
current value of the input box. Let's
assume that the user has typed
"foo"(without quotes). Autocomplete
will then request
my_autocomplete_backend.php?q=foo.
The backend should output possible
values for the autocompleter, each on
a single line. Output cannot contain
the pipe symbol "|", since that is
considered a separator (more on that
later).
An appropiate simple output would be:
foo
fool
foot
footloose
foo fighters
food fight
I wrote an Asp.Net WebControl and some Asp.Net MVC extension methods wrapping the JQuery UI autocomplete widget.
I wrote documentation as well about how to implement a working resource providing a JSon result.
You can find it at:
http://autocompletedotnet.codeplex.com/
Hope it can help