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Besides implementing proper database design, you can often keep track of problems in your application code by watching your logs. If you click through your server application while watching the development log, for instance, you ll often see things like the following: Processing UsersController#create (for 127.0.0.1 at 2007-10-31 17:27:12) [POST] ... Redirected to http://localhost:3000/ Completed in 0.15690 (6 reqs/sec) | DB: 0.12190 (77%) | 302 Found [http://localhost/users] In this request to /users, the application is processing only six requests per second, and it spends the vast bulk of that time interacting with the database. If most of your site s actions take this long especially if they re not database-bound you may want to investigate further by doing some benchmarking to find the bottleneck. Benchmarking can be an intimidating subject, especially for those of us who don t have a background in server administration. 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NET MVC applications. ... Net" library to generate a QR Codeand read data from that image. ... Net package in your application, next add anASPX page named QCCode. aspx in your project (see Figure 2). asp.net create qr code How To Generate QR Code Using ASP . NET - C# Corner 24 Nov 2018 ... How To Generate QR Code Using ASP . NET . Introduction. Create an empty web project in the Visual Studio version of your choice. Add Web Form, right-click on the project, select Add New Item, choose web form, give it a name and click on Add. Add script and styles in web form head section. From here, let s go ahead and edit our new blog and post models to add the necessary associations and validations. Our blog model (/app/models/blog.rb) should look like this: class Blog < ActiveRecord::Base has_many :posts validates_presence_of :name end while our post model (/app/models/post.rb) should look like this: class Post < ActiveRecord::Base belongs_to :blog validates_presence_of :blog_id, :title, :body end Before we run our database migrations, let s save ourselves a little hassle by creating our initial blog object and a sample post within our migration. So open our create blogs migration These are some of the critical Android-specific packages. From this list you can see the depth of the Android core platform. qr code generator in asp.net c# How to display a QR code in ASP . NET and WPF - Scott Hanselman 19 Jan 2014 ... As I mentioned, we display the QR code on an ASP. ... NET. If you're generating aQR code with ASP . NET MVC , you'll have the page that the ... asp.net create qr code Dynamically generate and display QR code Image in ASP . Net 5 Nov 2014 ... Net in C# and VB. Net . For generating QR Codes I will make use of QRCoderwhich is an Open Source Library QR code generator . TAGs: ASP . One area to pay particular attention to while building your service and its clients is ActiveResource. As you may have noticed in the previous chapter, if you re not careful it can be very easy to forget that ActiveResource is not an ActiveRecord replacement. In particular, code that might be perfectly reasonable when dealing with ActiveRecord can become a major performance sink with ActiveResource. Take a has_many relationship, for instance. With ActiveRecord, you can easily call movie.releases in a controller or view to get the releases for a given movie record. If you don t plan ahead with ActiveResource, though, you may end up calling out to your source site In addition, Android provides a number of packages in the java.* namespace. These include awt.font, io, lang, lang.annotation, lang.ref, lang.reflect, math, net, nio, nio.channels, nio.channels.spi, nio.charset, security, security.acl, security.cert, security.interfaces, security.spec, sql, text, util, util.concurrent, util.concurrent. atomic, util.concurrent.locks, util.jar, util.logging, util.prefs, util.regex, and util.zip. Android comes with these packages from the javax namespace: crypto, crypto.spec, microedition.khronos.egl, microedition.khronos.opengles, net, net.ssl, security.auth, security.auth.callback, security.auth.login, security.auth.x500, security.cert, sql, xml, and xmlparsers. In addition, it contains a lot of packages from org.apache.http.*. It also carries org.json, org.w3c.dom, org.xml.sax, org.xml.sax.ext, org.xml.sax.helpers, org.xmlpull.v1, and org. xmlpull.v1.sax2. Together, these numerous packages provide a rich computing platform to write applications for handheld devices. file (/db/migrate/001_create_blogs.rb), and add a Blog.create call for when we create the blog table: class CreateBlogs < ActiveRecord::Migration def self.up create_table :blogs do |t| t.column :name, :string end Blog.create(:name => 'My Simple Blog') end def self.down drop_table :blogs end end Next, let s also add a sample post to our newly created blog when we create our posts table, so edit /db/migrate/002_create_posts.rb to do that with these modifications: class CreatePosts < ActiveRecord::Migration def self.up create_table :posts do |t| t.column :blog_id, :integer t.column :title, :string t.column :body, :text t.column :created_at, :datetime t.column :updated_at, :datetime end blog = Blog.find :first blog.posts.create(:title => 'My Very First Blog Post', :body => 'Nothing Interesting to see here yet') end def self.down drop_table :posts end end Now, we can go ahead and run our migrations to build the tables for these models in our database as well as create our blog and a sample post: rake db:migrate asp.net vb qr code Easy QR Code Creation in ASP . 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