C# - Can Create A Web Service That Streams A Pdf For Download
Aug 19, 2010
My company has just purchased a .net version of Cete Pdf Merger (great product btw). We use both .Net & asp code and will likely use java in the future as well.
The scenario is that one technology (asp, java, .net) would have a list of raw data such as an array of field names & values. This data would be posted to the web service that would then open a given pdf, match pdf form fields to the field names array, grab the corresponding value, populate it on the pdf, and then stream the pdf back to the user to download.
I will keep checkbox for each one to select. Suppose a user selected the four files and clicked the button,which I kept under. Then I instantiate clasees for each type of file to convert into pdf, which I wrote already and converted them into pdf and return them. My problem is the clases is able to read the data form URL and convert them into pdf. But I don't know how to return the streams and merge them.
I have a database which stores .png images as the sql "image" type. I have some code which retrieves these images as a byte[], and sends them to the page via the FileContentResult object in .Net. Performance is key in this application, and the images have to be retrieved and displayed as quickly as possible. My question is, can this operation be performed quicker by passing a byte stream from the database to the browser, and not at anytime storing the whole byte array in memory. If this is possible and worthwhile doing, how do I do it?
I developed a web service in VS2010 on my local machine, wrote a consumer of it also locally, and that all works.
I copied the dll and the asmx file to our server, and I am getting an error when I try to invoke it from a browser (also still on the server machine) to make sure it correctly exposes its web methods, but it is not, it is saying "Could not create type 'Service'". That error comes from this line:
Line 1: <%@ WebService Language="C#" CodeBehind="~/App_Code/WarrantyDuplicate.cs" Class="Service" %> There other web services in the same folder on the server that all work fine so I don't believe it's an IIS setup thing.
This is my first web service in C# and when I created it in VS I did think it odd that the code behind file went into App_Code (as you can see from the line in the asmx file) and is just named dot-cs rather than asmx-dot-cs. But since it worked fine locally, I wasn't sure that mattered.
I'd like to write and read TCP Streams directly without any modifications by ASP or IIS. Is this possible?
Edit: Goal is to provide communication between a program and a server. Data exchange between them is less then 25 bytes per connection (in default case). So Headers will cause more traffic then the real data. I need to use ASP.Net because the owner of the server will not let me execute my programs.
How to create an instance of web service without adding web service reference? How to identify the server address/name where the web service is hosted from C# code?
I am trying to implement a service to download a image file. The code does nothing but upload a file to the response with each client request.
There are no SOAP messages involved but I am planning to implement it as ASP.NET web service. It can also be implement as ASP.NET website but since it has no view (forms, html etc) I planned to implement a web-service.
I have a web service I put together that has a custom soap header for the authorization (UserName and Password).I have a function currently that will allow a user to download a file from my site via a web service.I have integrated this download to the membership system of the site.They are using a vb.net front end client to perform the download.The files I download are around a meg in size.I would like to show the download progess of the file.I was going to setup MTOM and download the file in chunks.I am trying to get around the authorization of each "chunk" of data that I am sending down to the client.I do not want to hit my authorization process for all of these calls to the web service with the file offset.The authorization header works well for other functions I have put together for this web service.
They set a username and password and then call a function for specific data that I am making available via the web service.Is there an easier method to stream a file to a user and show the download progress of the file?I was going to generate a token and have that token passed per chunk,but I still have to go through my security process.Can anyone assist in the proper design of a webservice to stream a file with progress and passing credientials.
I have a very simple WCF Web Service it has methods like the ones below. It should be said that my webservice is very simple, I didn't do any configuration. Now I want to upload and download photos like .jpg or .jpeg files. But my question to you how shall I write the methods to be able to download and upload photo files to the WCF web service from my client?
There are three serves on the same zone. 172..*.**
Suppose that their names are A,B and C
The server A has a windows service, and it downloads the files from the server of C, in the folder of images. It used to give errors about access-denied then we assign full control to everyone on the folder of images on the server C. Then it was ok.
Now the same windows service runs on the server B, and ,t gets the same things from images folder of the server C. But there is an error about access-denied.
What should I do for the required steps to make the server B be able to connect the server C and download the files?
**The error: Exception:Access to the path '172..*.images' is denied.
i want to create a web service which consists of CRUD operations Create, Retrieve, Update and Delete. creating web methods on insert and update operations.
I need to create a button, which when clicked shows the download pop up box, but I don't know how, and would be grateful if someone could show me how? The box needs to work with any file type, the file name will be based upon a value from a database.
I want to create a .doc-file in my code behind and let the user download it somehow. How can this be done in the simplest way without saving the file at the server? I heard MemoryStream can be used but I'm not exactly sure how.
I'm currently trying to write data (client machine) into a xml file where the user can save. However, I want the users to be able to decide on where they want to save this written xml file. Is there any controls or codes that I can use to allow the users to save the file?.
My goal is to create some Excel reports that users can download from my asp.net site. The data for the reports will come from an SQL database. I am using Visual Studio 2010 and the reports will be for Excel 2007.
This should be pretty simple but I don't work on my website code too often so I thought I would ask about this. I have a download link for an application of mine on my website and I wanted to keep track of how many downloads are taking place so I want to create a counter. I added a table to the SQL database I already have on my website with the columns Downloads and CountID which is listed in the column properties as identity specification. At first I just had the column Downloads but when doing a query I was having problems so I added CountID and that made the query easy to do.
When the link on the download page on my website is clicked I wanted Downloads to increment by 1 each time. I used Visual Web Developer to build my site. Should I use a Web Method to increment that or is there a more direct method. I also noticed when I'm working in Visual Web Developer and I have the designer open for a webpage that in the toolbox items you have table and the icon looks the same as a table for an SQL Database. Should I perhaps use that? Add a table to this webpage and work with that?
User's need to "download" an excel sheet with data.
However this sheet need to be created on the fly (user's can check of which data they want exported).
From the user's point of view, it will just be a link "Download Now".
From coding point of view I will have an IList<MyClass> where MyClass say got members like EntryId, FirstName, LastName etc.
I do not want all fields to be dropped into the sheet (so I will need control over that in my code)
This sounds like what I'm after (since I'll always only have one sheet)
Create an HTML document and save it with a .xls extension - Excel will open it and treat it like a native Excel file. This method is very simple and, of course, free - however, it won't allow you to have more than one worksheet in the Excel workbook...
I need to create a .XLS file and put it available for download in my .aspx page. this file is needed to have information from database. I'm using Linq to SQL. So I need a C# code for reading from DataBase using Linq and create a .XLS file for download.
