Assuming you can get a byte representing your PDF: bestthing.info(); bestthing.infotType = "application/pdf"; Response. Net Component Library Developers To directly serve a PDF file in other ASP. Net gets our pdf as a byte array and then sends it to the buffer; bestthing.info . I have the following code If bestthing.info() Then If CStr(dr("doc_name")).ToUpper. EndsWith(".PDF") Then bestthing.infotType = "application/pdf".
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If I want to display a PDF file in the browser instead of downloading a tell the browser via an additional Content-Disposition response header. NOTE the additional back slashes are to escape the quotes which are actually required bestthing.infotType = "\".pdf\", \"application/pdf\""; Response. In this article, I will explain how to open a PDF file in a web browser using ASP. NET.
Protect and preserve data. NET MVC provides a simple and versatile means of returning different types of response to the browser.
Want to serve a PDF file with dynamically-generated content? Do an SEO-friendly permanent redirect? Dino shows you how simple this can be using a tailor-made ActionResult class. In ASP. You can force an ASP. NET Web page to return a different type of response such as an image but that is a rather unnatural action.
This is because ASP. The action method is merely a public method with no special constraints on the input parameters and is forced to return a type that inherits from a system type-the ActionResult type. More precisely, you can design an action method to return any.
The Result of an Action
NET type, including primitive and complex types. You can also return void. If the action method is void, the actual type being processed is EmptyResult. If the type is any. The actual return value of any controller action is an object that inherits from ActionResult. As the name suggests, this object represents the result of the action: It embeds data and knows how to process it in order to generate the response for the browser.
It is important to note that the ActionResult object is not what the client browser is going to receive. Getting an ActionResult object is only the first step to finalize the request.
NET Reflector. As you can see, ActionResult is an abstract class with just one overridable method-ExecuteResult. The response for the browser is generated and written to the output stream by invoking ExecuteResult on a concrete type that derives from ActionResult. The class that does this is the action invoker, a system component that governs the whole process of executing a request and creating the response for the browser.
You can envisage the ActionResult class as being a way to encapsulate the particular type of response that you want to send to the browser. The response certainly comprises the actual data but it also includes the content type, the status code, and any cookies and headers that you intend to send. All of these things are aspects of the response you might want to control through a tailor-made ActionResult class. The mechanics of action result classes is best understood by taking a tour of a couple of system-provided action result classes.
As you can see, all it does is to set the status code and description of the HTTP response object. As the code listing shows, this class is just a wrapper that does nothing more than set the status code:. To create, for example, a HttpNotFoundResult custom type, all you have to do is to duplicate the previous code and just set the proper status code; 0x in this case. A slightly more sophisticated example is the FileResult class. This class supplies a public property, the ContentType property that contains the type of the data being written to the output stream.
In the implementation of ExecuteResult , the class simply downloads the content of a given file. FileResult is a base class, and in fact it exposes an abstract method-the WriteFile method-through which derived class can specify how to download and where and how to get the bits.
It is interesting to note the role of the FileDownloadName property. Instead, it gets and sets the content-disposition header. The class FilePathResult builds on top of FileResult and just adds the ability to download any type of file.
Downloading PDF File from Server to Client using ASP.NET & MVC C#
This class defines a FileName property and uses the native TransmitFile method of the Response object to download the file. With this information to hand, we can conclude that the action result object is simply a way to encapsulate all the tasks you need to accomplish in particular situations such as:.
Suppose that at some point you decide to expose a given feature of your application through another URL but still need to support the old URL. This feature, however, is lacking in ASP. Anyway, it would be a good exercise to have a look at a possible implementation that follows closely that of RedirectResult in ASP. Having this class available you can easily move your features around without impacting the SEO level of your application.
A common developer requirement is to return binary data from a request.
Using PDF Export for ASP.NET Web applications
Among the built-in action result objects, you can certainly find one that helps you to work with your particular type of binary data.
If the content you want to transfer is stored within a disk file, you can use the FilePathResult object.
If your content is available through a stream you use FileStreamResult and you opt for FileContentResult if you have it available as a byte array. All these objects derive from FileResult and differ from one another only in the way that they write out data to the response stream.
Better yet, you can use the ad hoc File method as below:.
To create PDF content on the fly, you can use a bunch of libraries such as Report. This would be particularly interesting for an ASP. The link where you can get the tool is http: NET MVC, you deploy the executable to the server, configure permissions properly so that a new file can be created in a given folder, and then invoke the executable programmatically:.
In this case, getpdf is assumed to be the name of an action method in your particular controller class. Second, where do you save the PDF file? How do you deal with related write permissions? Once you have the PDF file, you just pass its path to the TransmitFile of the Response object for actual transmission. Next, you fill in the bookmarks with fresh data and save it as PDF. The first parameter indicates the name of the resulting PDF file.
Finally, the remaining parameters are for the data to store in the document via bookmarks. In particular, the template must have a couple of bookmarks with fixed names the ones in the code are merely examples. Once the document is finalized and saved, you may close the Word application but you need to choose the close option wdDoNotSaveChanges as otherwise it would pop up a dialog box which would be very, very, bad for an unattended server environment.
A moment ago, I just raised a little doubt on the effectiveness of using an Office application from within a server environment such as ASP. The URL is http: Overall, the reason for not using Office applications server-side is that these applications may exhibit an unpleasant behavior in terms of scalability, permissions, and interactivity. Having said that, as long as this was not a critical production system, and if you can find the right balance of permissions and parameters and fine tune the ASP.
NET application the way you want the only serious concern is scalability. For this reason, you might want to move Office functions to a service that does the work in isolation and returns a PDF stream.
The companion code for this article provides a sample ASP. Related Links Guidance Samples Videos. EndsWith ". PDF" Then Response. RichardD Contributor.
ASP and ASP.NET - Write data directly to a browser without creating a local copy
ExecuteReader CommandBehavior. HTM" Or filenm. TIF" Then Response. JPEG" Or filenm. JPG" Then Response. BinaryWrite myimg Response. Vijay My blog: Open with file path will help. BinaryWrite myimg ' Response. End ' Response. Xequence Contributor. Mysite Credentials CurbSmash.
If dr. Clear Response. SetCacheability HttpCacheability. NoCache If filenm. Flush Response. End End Try. Gary yang Such as follows: Imports System Imports System. Web Imports System. Exists strDownLoad Then context.
Write "File doesn't exists! Open, FileAccess.BTW, I'm very impressed with what I've seen so far. Want to serve a PDF file with dynamically-generated content? Reading the MSDN docs didn't illuminate me on whether this was strictly necessary. Add templateName ;. Clear ; Response.