I'm new to ASP.NET MVC and not that good with coding. I'm trying to download my returned list from view as a PDF document
The exact error I get is:
System.IO.IOException
HResult=0x80131620
The document has no pages.
Source=itextsharp
StackTrace:
at iTextSharp.text.pdf.PdfPages.WritePageTree()
at iTextSharp.text.pdf.PdfWriter.Close()
at iTextSharp.text.pdf.PdfDocument.Close()
at iTextSharp.text.Document.Close()
My controller with function
My view html
Your problem is in your jquery and your html, you are not passing any values into your div, your table is also not in your div. Thus jquery is pulling nothing, that means that your stream is getting no bytes.
Related
I'm writing an app in Swift 3.0 and I'm trying to scrape data from the search results of a webpage. I perform the search by including the search query as a parameter in the url, but the html that's getting returned to me has no results. I believe this is because the ajax on the webpage has not finished and populated the html with the search results by the time the html is returned to my app.
Question
How do I wait for the search results to load before getting the html?
EDIT:
URL: https://uscdirectory.usc.edu/web/directory/faculty-staff/#basic=a
This url performs a search on the USC directory for the character 'a'. The html in my browser on my MacBook includes these tags:
<tbody>(Search results are here)</tbody>
but in my app the html that is returned to me has nothing:
<tbody></tbody>
This is because the webpage initially has no search results, and then some time later the ajax finishes and the table body is populated. How do I use a URLSessionDataTask object in Swift to wait until the ajax finishes and ONLY THEN give me the html, such that I actually get the search results?
The workaround solution that I devised is unpleasant but functional. I created a WKWebView off screen and loaded the webpage I was interested in. I used a Timer to wait some arbitrary number of seconds for the javascript on the page to finish and then I retrieved the html from the webview
You can use property ajaxComplete() to fix this.
Ex:
$(document).ajaxComplete(function(){
//your code to render HTML
});
It will render your HTML only when ajax request is complete.
I am working on a project where we are starting to add in angularjs. I have a page where I am injecting some html into the page from an $http request. When I get the data back I compile it and insert it into the document. This all works. The problem I have is it is a large amount of html that has to be inserted into the site. If I save the html in a variable or cache (cacheFactory) I can then just recompile it and add it again. This works but the problem is when it $compiles it it makes the page non-responsive for a second or 2.
What I want to know is if I can cache the $compile html and just reuse that? What I have been trying so far does not work.
promise.then(function(data)) {
cacheService.put("testData", $compile(data)($scope));
addTestData();
}};
function addTestData() {
$("#placeHolder").empty().html(cacheService.get("testData"));
}
I have a page that has a "prev" and "next" day button, and rather than reload the entire page, I simply do an ajax call to a controller that returns the entire partial view, which I replace the div with.
$("#divId").html(ajaxResponse);
Pretty simple.
However, I'm finding that this partial view is vastly more data than I need (html doesn't change at all, just the data) and it's causing slowness on mobile browsers.
My question is, is there a tool out there that will let me return a JSON representation of the model data and refresh all the values on the page automatically?
For example, say I have:
#Html.InputFor(x => x.FirstName)
and the JSON returns
{ FirstName: 'Henry', LastName: 'McLeery' }
Is there a library available that can automate the process of doing:
$("#FirstName").val(ajaxResponse.FirstName);
$("#LastName").val(ajaxResponse.LastName);
etc...
?
Take a look at Angular.js. Angular is a JavaScript framework which uses the mvc pattern.
After binding UI elements to your model the displayed data changes automatically when updating your model. Angular offers a nice api to consume ajax requests with json data.
Look at this:
Get and update json using angular.js
in Blackberry Cascades (C++, QT, QML), I am trying to read the html of a webview - but it is returning blank. This webview uses "setUrl(url") to set the url, and does not use "setHtml(html)". Anyway - I have this code:
WebView {
id: loginView
objectName: "loginView"
onMicroFocusChanged: {
console.log("html: " + html);
}
}
And the webview url has two textfields, and when I put my cursor into those text fields or when I type in them, the html of the webview shows up as blank - but I need to see the html, because I am trying to be able to parse that html to get the content of those textfields.
How come the html is blank - and how can I get access to this html?
The Html property of the WebView only returns the code that was inserted with setHtml. (Documentation)
Even if it did report code loaded from a web address, I doubt it would be updated with the current value of textboxes.
To read their content, I recommend you look into the messageReceived signal of the WebView. If you can change the html-code that contains your text boxes, you can use javascript navigator.cascades.postMessage() to send the data to your application.
If you do not control the html, you can still use the evaluateJavaScript method to extract the values of the textboxes with DOM functions from inside your app.
I am trying to open HTML file from the local URI which I use as XML Editor, to edit xml data that come from Silverlight application, then close browser window and return back edited xml data to the Silverlight application.
I tried to use HtmlPage.Window.Navigate but I don't quit like it.
I have tried using a method from: http://weblogs.asp.net/dwahlin/archive/2010/05/10/integrating-html-into-silverlight-applications.aspx
but instanly got an exception "failed to invoke ShowJobPlanIFrame"
Is there any way to handle this task?
"Out of browser" mode doesn't fit.
Thanks.
===========================================================================
Update:
It worked out using IFrame overlay.
Button click invokes the following code in C#:
var scriptObject = (ScriptObject)HtmlPage.Window.GetProperty("ShowJobPlanIFrame");
scriptObject.InvokeSelf(url);
Where "ShowJobPlanIFrame" is as defined at:
http://weblogs.asp.net/dwahlin/archive/2010/05/10/integrating-html-into-silverlight-applications.aspx
This allowed me to pass data into XML editor and then get it back.
An error with JavaScript function invocation I told above, was my fault in JavaScript code itself.
A very similar scenario: https://stackoverflow.com/a/7919065/384316
Try using an iframe overlay, then you can load any HTML-like content.
There is an excellent explanation of how to do this here:
http://www.wintellect.com/cs/blogs/jlikness/archive/2010/09/19/hosting-html-in-silverlight-not-out-of-browser.aspx
It worked out using IFrame overlay.
Button click invokes the following code in C#:
var scriptObject = (ScriptObject)HtmlPage.Window.GetProperty("ShowJobPlanIFrame");
scriptObject.InvokeSelf(url);
Where "ShowJobPlanIFrame" is as defined at:
http://weblogs.asp.net/dwahlin/archive/2010/05/10/integrating-html-into-silverlight-applications.aspx
This allowed me to pass data into XML editor and then get it back.
An error with JavaScript function invocation I told above, was my fault in JavaScript code itself.
Did you try NavigationFramework of Silverlight? It's capability may support your needs in a more simple way than using multiple browser pages.