I am trying to use a browser object to get some data from a website. the problem is that for one site i have to redirect, get some other info and then go back to this site.
my coed so far is
private void getInfo(cEXWB browser, string url)
{
if (url == "www.specificwebsite.com")
{
browser.navigate2("www.mywebsite.com");
int myAnswer = getData(browser);
}
browser.navigate2(url);
}
the problem is that i can NEVER get my browser to navigate 2 times. That is - if i need to navigate to "www.mywebsite.com" - it doesn't navigate to url.
What am i doing wrong?
Thanks!
Try that:
private void getInfo(cEXWB browser, string url)
{
if (url == "www.specificwebsite.com")
{
browser.navigate("www.mywebsite.com");
int myAnswer = getData(browser);
}
browser.navigate(url);
}
I think that browser.navigate2("www.mywebsite.com");
the 2 is messing it up
You should wait till first navigation is completed.
It should be something like:...
browser.Navigated += (sender, webBrowserNavigatedEventArgs) =>
{
int myAnswer = getData(browser);
browser.Navigate(secondurl);
};
browser.Navigate(firsturl);
Related
I am working on a cefsharp based browser and i am trying to implement a search engine into the browser, but the code I have tried docent work, it doesn't really have any errors but when i star the project and type something i the text field nothing happens and it dosent load the search engine i entered into the code, the only time the textbox loads anything is when a url is typed.
This is the code used in the browser that docent work
private void LoadUrl(string url)
{
if (Uri.IsWellFormedUriString(url, UriKind.RelativeOrAbsolute))
{
WebUI.Load(url);
}
else
{
var searchUrl = "https://www.google.com/search?q=" + WebUtility.HtmlEncode(url);
WebUI.Load(searchUrl);
}
}
i have also tried
void LoadURl(String url)
{
if (url.StartsWith("http"))
{
WebUI.Load(url);
}
else
{
WebUI.Load(url);
}
}
i was also suggested to try
private void LoadUrl(string url)
{
if (Uri.IsWellFormedUriString(url, UriKind.RelativeOrAbsolute))
{
WebUI.LoadUrl(url);
}
else
{
var searchUrl = "https://www.google.com/search?q=" + Uri.EscapeDataString(url);
WebUI.LoadUrl(searchUrl);
}
}
We have here really few Information on how your code works. But what I notice is that you use WebUtility.HtmlEncode for the search query. WebUtility has also a WebUtility.UrlEncode Method, that how I understand your question makes more sense it the context. This is the documentation for the method: https://learn.microsoft.com/de-de/dotnet/api/system.net.webutility.urlencode
The Url you are generating is invalid. You need to use Uri.EscapeDataString to convert the url param into a string that can be appended to a url.
// For this example we check if a well formed absolute Uri was provided
// and load that Url, all others will be loaded using the search engine
// e.g. https://github.com will load directly, attempting to load
// github.com will load the search engine with github.com as the query.
//
if (Uri.IsWellFormedUriString(url, UriKind.Absolute))
{
chromiumWebBrowser.LoadUrl(url);
}
else
{
var searchUrl = "https://www.google.com/search?q=" + Uri.EscapeDataString(url);
chromiumWebBrowser.LoadUrl(searchUrl);
}
nothing happens and it dosent load the search engine
You need to subscribe to the LoadError event to get actual error messages. It's up to you to display errors to the user. The following is a basic example:
chromiumWebBrowser.LoadError += OnChromiumWebBrowserLoadError;
private void OnChromiumWebBrowserLoadError(object sender, LoadErrorEventArgs e)
{
//Actions that trigger a download will raise an aborted error.
//Aborted is generally safe to ignore
if (e.ErrorCode == CefErrorCode.Aborted)
{
return;
}
var errorHtml = string.Format("<html><body><h2>Failed to load URL {0} with error {1} ({2}).</h2></body></html>",
e.FailedUrl, e.ErrorText, e.ErrorCode);
_ = e.Browser.SetMainFrameDocumentContentAsync(errorHtml);
}
For testing purposes you can also copy and paste the searchUrl string you've generated and try loading it in Chrome to see what happens, you should also get an error.
I'm developing a website in ASP.Net 4. One of the requirements is to log search queries that people use to find our website. So, assuming that a URL parameter named "q" is present in Referrer, I've written the following code in my MasterPage's Page_Load:
if (!CookieHelper.HasCookie("mywebsite")) CookieHelper.CreateSearchCookie();
And my CookieHelper class is like this:
public class CookieHelper
{
public static void CreateSearchCookie()
{
if (HttpContext.Current.Request.UrlReferrer != null)
{
if (HttpContext.Current.Request.UrlReferrer.Query != null)
{
string q = HttpUtility.ParseQueryString(HttpContext.Current.Request.UrlReferrer.Query).Get("q");
if (!string.IsNullOrEmpty(q))
{
HttpCookie adcookie = new HttpCookie("mywebsite");
adcookie.Value = q;
adcookie.Expires = DateTime.Now.AddYears(1);
HttpContext.Current.Response.Cookies.Add(adcookie);
}
}
}
}
public static bool HasCookie(string cookiename)
{
return (HttpContext.Current.Request.Cookies[cookiename] != null);
}
}
It seems ok at the first glance. I created a page to mimic a link from Google and worked like a charm. But it doesn't work on the host server. The reason is that when you search blah blah you see something like www.google.com/?q=blah+blah in your browser address bar. You expect clicking on your link in the results, will redirect to your site and you can grab the "q" parameter. But ,unfortunately, it is not true! Google, first redirects you to an address like:
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCgQFjAA&url=http%3A%2F%2Fwww.mywebsite.com%2F&ei=cks5Uof4G-aX0QXKhIGoCA&usg=AFQjCNEdmmYFpeRRRBiT_MGH5a1x9wUUlg&bvm=bv.52288139,d.d2k&cad=rja
and this will redirect to your website. As you can see the "q" parameter is empty this time! And my code gets an empty string and actually doesn't create the cookie (or whatever).
I need to know if there is a way to solve this problem and get the real "q" value. The real search term user typed to find my website. Does anybody know how to solve this?
Google stopped passing the search keyword:
http://www.searchenginepeople.com/blog/what-googles-keyword-data-grab-means-and-five-ways-around-it.html
Edit: Sorry - now that I've understood the problem a bit better, I think my problem lies elsewhere
I have 2 asynchronus requests.
The first is this:
public void DownloadWebData(Uri apiUrl)
{
WebClient client = new WebClient();
client.DownloadDataCompleted += DownloadDataCompleted;
client.DownloadDataAsync(apiUrl);
}
public void DownloadDataCompleted(object sender, DownloadDataCompletedEventArgs e)
{
string result = System.Text.Encoding.UTF8.GetString (e.Result);
Uri downloadLink = (GetUri(result));
}
Basically it makes a simple url based API request to a remote webserver which returns some basic textual data over http. GetUri() just parses that data to extract an address from the data for an image to download.
I'm then using imageLoader in monotouch.dialog to download the image. All code is in the same class.
Edit: added the imageLoader code (I left the Console lines in because they serve reasonably well as comments).
public void downloadImage (Uri imageUri)
{
var tmp_img = ImageLoader.DefaultRequestImage (imageUri, this);
if (tmp_img != null)
{
adView.Image = tmp_img;
Console.WriteLine ("Image already cached, displaying");
}
else
{
adView.Image = UIImage.FromFile ("Images/downloading.jpg");
Console.WriteLine ("Image not cached. Using placeholder.");
}
}
public void UpdatedImage (System.Uri uri)
{
adView.Image = ImageLoader.DefaultRequestImage(uri, this);
}
You missed to check if e.Result actually contains something. The download might as well have failed and e.Result is null. Add some basic error handling to your code.
if you are using DownloadWebData inside a for loop, it will be better you generate seperate functions for DownloadDataCompleted event.
You can use anonymous function inside DownloadWebData().
client.DownloadDataCompleted +=(s,e)=>{
string result = System.Text.Encoding.UTF8.GetString (e.Result);
Uri downloadLink = (GetUri(result));
};
After realizing I was asking the wrong question, I finally figured it out here:
Hand back control to main UI thread to update UI after asynchronus image download
I'm trying to find opened webpage by URI and to launch JS on it. I found some samples and wrote simple method. That's how it looks:
private void GetHtmlCode()
{
string uri = GetTargetURI();
if(!string.IsNullOrEmpty(uri))
{
IE ie = IE.AttachTo<IE>(Find.ByUrl(uri));
htmlCode = ie.Eval(JavaScriptToRun);
}
else
{
MessageBox.Show("Target page is not opened",
"Notification", MessageBoxButtons.OK);
}
}
And there's a method for getting URI:
private string GetTargetURI() //проверка URL
{
Regex reg;
Match match;
foreach(SHDocVw.InternetExplorer ie in shellWindows)
{
reg = new Regex(patternURL);
match = reg.Match(ie.LocationURL.ToString());
if (!string.IsNullOrEmpty(match.Value))
{
pageURL = ie.LocationURL.ToString();
return pageURL;
}
pageURL = string.Empty;
}
return pageURL;
}
- so URI is completely correct or empty.
The problem is IE ie = IE.AttachTo<IE>(Find.ByUrl(uri)); always throws
WatiN.Core.Exceptions.BrowserNotFoundException: Could not find an IE window matching constraint: Attribute 'href' equals uri '%my_target_URI%'. Search expired after '30' seconds.
I've googled a lot, but still didn't find any solution :(
Can anybody help please?
Thanks.
Try to use:
Browser.AttachTo<IE>(Find.ByUrl(u => u.Contains("NewMapping")))
And make sure your function is not returning empty, since this should be the reason why the windows is not being captured.
Regards!
public void FindCityName()
{
string url = "http://maps.google.com/maps/geo?q=39.920794,32.853902&output=json&oe=utf8&sensor=true&key=MYKEY";
var w = new WebClient();
Observable.FromEvent<DownloadStringCompletedEventArgs>(w, "DownloadStringCompleted").Subscribe(r =>
{
var deserialized = JsonConvert.DeserializeObject<RootObject>(r.EventArgs.Result);
string s = deserialized.Placemark[0].AddressDetails.Country.SubAdministrativeArea.Locality.LocalityName;
/// setCity() and City=s produce the same thing
setCity(s);
City = s;
//foreach (var item in deserialized.Placemark)
//{
// //MessageBox.Show(item.AddressDetails.Country.SubAdministrativeArea.Locality.LocalityName);
// City = (string)item.AddressDetails.Country.SubAdministrativeArea.Locality.LocalityName;
//}
//Problem here >>>>>
////MessageBox.Show(City);
});
w.DownloadStringAsync(new Uri(url));
}
Problem:
I am working on a windows phone 7 application and I need to find the "City Name" from GPS coordinates in order to move forward...
I found the code above on the internet and tried it. I can see the city name by using these codes(Message.Box(City) show exactly what I want, the city name). However, this line of code
deserialized.Placemark[0].AddressDetails.Country.SubAdministrativeArea.Locality.LocalityName;
which gives me the city name seems to give a volatile string value.
For example, I created a method which assigns the value of string variable "s" to the string field of my class, name City. If I try to get the City's content after calling FindCityName() method, I see that City's content is not updated.
Again, same thing happens then I call the code line under the comment "Problem here >>>>>" that MessageBox.Show(City) shows nothing new...
Can someone explain me the reason of my problem?
you put this question on my blog as well, but I will answer it here. I feel a bit responsible for putting up the sample code in the first place ;-)
I am going to assume the class containing your code looks like this:
public class MyClass
{
private void MyMethod()
{
FindCityName();
MessageBox.Show(City);
}
private void FindCityName()
{
// Code omitted - see your question
}
private string City;
}
There is nothing volatile about the string. Your problem is asynchronicity. If you look carefully you will see that I use an observable that fires when the DownloadStringCompleted is fired. The code inside Observable.Event is only called when the download is finished but that happens asynchronously. But what I assume you do is call the FindCityName method and then directly trying to access results like I show in the MyMethod method. That's like directly wanting the result after firing the request. The results are not in yet! It's like a web page downloading - it takes a while. You can fix that with a callback, something like this:
public class MyClass
{
private void MyMethod()
{
FindName();
}
public void FindCityName()
{
string url = "http://maps.google.com/maps/geo?q=39.920794,32.853902&output=json&oe=utf8&sensor=true&key=MYKEY";
var w = new WebClient();
Observable.FromEvent<DownloadStringCompletedEventArgs>(w, "DownloadStringCompleted").Subscribe(r =>
{
var deserialized = JsonConvert.DeserializeObject<RootObject>(r.EventArgs.Result);
City = deserialized.Placemark[0].AddressDetails.Country.SubAdministrativeArea.Locality.LocalityName;
DoneDownloading();
});
w.DownloadStringAsync(new Uri(url));
}
private string City;
private void DoneDownloading
{
MessageBox.Show(City);
}
}
Does that help?
I would recommend you to use this Google Map API
http://maps.googleapis.com/maps/api/geocode/json?latlng=39.920794,32.853902&sensor=true
And once you get JSON response in your request. You can parse easily with NEWTONSOFT for wp7
WebClient wc = new WebClient();
var json = (JObject)JsonConvert.DeserializeObject(wc.DownloadString(url));
var locality= json["results"]
.SelectMany(x => x["address_components"])
.FirstOrDefault(t => t["types"].First().ToString() == "locality");
var name = locality!=null ? locality["long_name"].ToString() : "";