Uploading/Downloading a File Using WCF REST Service in . NET 3. 5. Last week, I blogged about how to create a RESTful service using WCF and how it was to actually not learn anything in order to make your existing WCF service RESTful. Converting a normal WCF service to being RESTful might be an easy task, but when it comes to streaming files over a REST call using WCF, it might get a little tricky. Here, we are going to cover just that part of our service. This article is in continuation of the last one. So, I would advice you to go through it to get some context. So, to start of with the implementation, we’ll write the service contract code first as shown below.
We are greeted with the below page: The error on the page says : For request in operation Upload. File to be a stream, the operation must have a single parameter whose type is Stream.
The above message occurs only when we create the service in . NET 3. 5. For . NET 4. The good news is that it's just a Red- herring and could be thought of as false warning.
Uploading/downloading a file using WCF REST service in.NET 3.5; Author: Chinmoy Mohanty; Updated:; Section: Windows Communication Foundation; Chapter.
This I say because if we hit our service from a consuming client, it would run just fine. It's just that when we activate our service, it does not work.
The bottom line is that we can easily ignore this error. Now, onto writing the Java. Script code to consume the service. It's pretty straightforward if you ask me.< div> < inputtype=.
Learn how to allow users to upload binary files (such as Word or PDF documents) to your Web site where they may be stored in either the server's file system or the. Uploading Files with ASP.NET. Written by: Christoph Wille Translated by: Bernhard Spuida First published: 8/2/2000. Something that could not reasonably be done under. The default paging option of a data presentation control is unsuitable when working with large amounts of data, as its underlying data source control retrieves all.
We have successfully implemented a WCF RESTful File Upload/Download service in . NET 3. 5 (and higher)Also, I’ve attached the complete project demonstrating WCF RESTful service here. Please do provide your valuable feedback in the comments below and let me know if you face any issues while implementing the service/. The post Uploading/Downloading a file using WCF REST service in . NET 3. 5 appeared first on Chinmoy Mohanty's Blog. Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.
Efficiently Paging Through Large Amounts of Data (C#)The default paging option of a data presentation control is unsuitable when working with large amounts of data, as its underlying data source control retrieves all records, even though only a subset of data is displayed. In such circumstances, we must turn to custom paging.
This article examines the implementation of upload and download functionality with progress indication (progress bar feature) using Windows Communication Foundation. ASP Q&A: Dealing with Corrupt Downloaded.docx Files From an ASP Site. How to deal with document files that are corrupted when being downloaded from an ASP website page.
Introduction. As we discussed in the preceding tutorial, paging can. Default Paging can be implemented by simply checking the Enable Paging option in the data Web control s smart tag; however, whenever viewing a page of data, the Object.
Data. Source retrieves all of the records, even though only a subset of them are displayed in the page. Custom Paging improves the performance of default paging by retrieving only those records from the database that need to be displayed for the particular page of data requested by the user; however, custom paging involves a bit more effort to implement than default paging. Due to the ease of implementation just check a. In such circumstances, we must turn to custom paging in.
The challenge of custom paging is being able to write. Fortunately, Microsoft SQL Server 2. In this tutorial we ll see how to use this new SQL. Server 2. 00. 5 keyword to implement custom paging in a Grid.
View control. While the. Note: The exact performance gain exhibited by custom paging depends on.
At the end of this tutorial we ll look at some rough metrics. Step 1: Understanding the Custom Paging Process. When paging through data, the precise records. For example, imagine that we wanted to page. When viewing the. There are three variables that dictate what records.
Start Row Index the index of the first row in the page of data to display; this index can be calculated by multiplying the page index by the records to display per page and adding one. For example, when paging through records 1. Start Row Index is 0 * 1. Start Row Index is 1 * 1. Maximum Rows the maximum number of records to display per page. This variable is referred to as maximum rows since for the last page there may be fewer records returned than the page size.
For example, when paging through the 8. No page, though, will show more records than the Maximum Rows value. Total Record Count the total number of records being paged through. While this variable isn t needed to determine what records to retrieve for a given page, it does dictate the paging interface. For example, if there are 8. UI. With default paging, the Start Row Index is computed.
Maximum Rows is simply the page size. Since default paging retrieves all of the. Start Row Index row a trivial task.
Custom paging provides two challenges: We must be able to efficiently associate a row index with each row in the entire data being paged through so that we can start returning records at the specified Start Row Index. We need to provide the total number of records being paged through. In the next two steps we ll examine the SQL script. In addition to the SQL script, we ll. DAL and BLL. Step 2: Returning the Total Number of Records Being Paged Through. Before we examine how to retrieve the precise subset. This information is needed in.
The total number of. SQL query can be obtained by using the COUNT aggregate function. For example, to determine the total number of records in the Products table, we can use the following query: SELECT COUNT(*). FROM Products. Let s add a method to our DAL that returns this. In particular, we ll create a DAL method called Total.
Number. Of. Products() that executes the SELECT statement shown above. Start by opening the Northwind. Typed Data. Set file in the App. Next, right- click on the Products. Table. Adapter in the Designer and choose Add Query.
As we ve seen in previous. DAL that, when. invoked, will execute a particular SQL statement or stored procedure. As with. our Table. Adapter methods in previous tutorials, for this one opt to use an. SQL statement. Figure 1: Use an Ad- Hoc SQL Statement.
On the next screen we can specify what type of query. Since this query will return a single, scalar value the total.
Products table choose the SELECT which returns a singe value option. Figure 2: Configure the Query to Use a SELECT Statement that Returns a Single Value. After indicating the type of query to use, we must.
Figure 3: Use the SELECT COUNT(*) FROM Products Query. Finally, specify the name for the method.
As. aforementioned, let s use Total. Number. Of. Products. Figure 4: Name the DAL Method Total. Number. Of. Products. After clicking Finish, the wizard will add the Total. Number. Of. Products method to the DAL. The scalar returning methods in the DAL return.
SQL query is NULL. Our COUNT. query, however, will always return a non- NULL value; regardless, the DAL method returns a nullable integer. In addition to the DAL method, we also need a method. BLL. Open the Products. BLL class file and add a Total.
Number. Of. Products method that simply calls down to the DAL s Total. Number. Of. Products method: public int Total. Number. Of. Products(). Therefore, we need to. Nod32 Trial . Username And Password - Update.