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how to generate barcode in c# net with example you ll learn in 7. in Font
you ll learn in 7. QR Encoder In None Using Barcode encoder for Font Control to generate, create QR Code image in Font applications. www.OnBarcode.comCreate USS-128 In None Using Barcode drawer for Font Control to generate, create UCC - 12 image in Font applications. www.OnBarcode.comCHAPTER 6 ACTION PACK: WORKING WITH THE VIEW AND THE CONTROLLER
EAN / UCC - 13 Drawer In None Using Barcode creator for Font Control to generate, create GTIN - 13 image in Font applications. www.OnBarcode.comGenerating Barcode In None Using Barcode printer for Font Control to generate, create Barcode image in Font applications. www.OnBarcode.comRedirecting
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Printing Barcode In Java Using Barcode creator for Android Control to generate, create Barcode image in Android applications. www.OnBarcode.comQR Code 2d Barcode Reader In .NET Using Barcode scanner for .NET Control to read, scan read, scan image in Visual Studio .NET applications. www.OnBarcode.comCHAPTER 6 ACTION PACK: WORKING WITH THE VIEW AND THE CONTROLLER
Data Matrix ECC200 Generation In Java Using Barcode printer for Android Control to generate, create Data Matrix ECC200 image in Android applications. www.OnBarcode.comUPC - 13 Drawer In Visual C# Using Barcode drawer for .NET framework Control to generate, create EAN 13 image in Visual Studio .NET applications. www.OnBarcode.comIf you look at the HTML source, you ll see that the input tags are surrounded by div elements with the class name fieldWithErrors: Draw DataMatrix In None Using Barcode printer for Software Control to generate, create ECC200 image in Software applications. www.OnBarcode.comCreate QR Code JIS X 0510 In Java Using Barcode printer for Java Control to generate, create QR Code image in Java applications. www.OnBarcode.com<div class="fieldWithErrors"> <input class="large" id="user_login" name="user[login]" size="30" type="text" value="" /> </div> QR Code JIS X 0510 Printer In Java Using Barcode generation for BIRT Control to generate, create Quick Response Code image in BIRT applications. www.OnBarcode.comPDF 417 Encoder In Java Using Barcode generator for Android Control to generate, create PDF 417 image in Android applications. www.OnBarcode.comRails does this automatically for any fields that failed validation, and you can use these classes to style invalid elements. Note The style rules that turn the invalid fields red are generated by the scaffold generator and are in public/stylesheets/scaffold.css. All static files, such as stylesheets and images, are located in the public directory. But wait a minute. Where is the formatted list of errors that we got with our invalid events Well, the scaffold generator added the helper that displays these, but if we want them to show up here, we ll have to do it ourselves. We ll use the error_messages_for helper and tell it the name of the model whose errors we want to see in this case, User. Add the following to the top of the new template in app/views/users/new.rhtml: <%= error_messages_for :user %>
Now submit the form one more time, again with empty fields. You should see the error messages, as shown in Figure 6-3. Figure 6-3. Error messages for invalid events
CHAPTER 6 ACTION PACK: WORKING WITH THE VIEW AND THE CONTROLLER
With all the plumbing in place, let s submit the form with valid data. If all goes according to plan, the new user should be created, and you ll be redirected to the events controller, where you ll see the friendly flash message we set. Notice that if you refresh the page using your browser s refresh button, the flash message will disappear. Adding the Edit Form
The next step is to add the edit and update actions to the controller. We ll also need an edit template. Create a new action called edit, as shown in Listing 6-6 (it looks a lot like the new action). Listing 6-6. Edit Action Added to app/controllers/users_controller.rb
def edit @user = User.find(params[:id]) end
Next, create the edit template in app/views/users/edit.rhtml as shown in Listing 6-7. Listing 6-7. The app/views/users/edit.rhtml Template
<h2>Edit User</h2> <% form_tag :action => 'update' do %> <p><label>Login:<br /> <%= text_field :user, :login %></label></p> <p><label>Email:<br /> <%= text_field :user, :email %></label></p> <p><label>Password:<br /> <%= password_field :user, :password %></label></p> <p><label>Password confirmation:<br /> <%= password_field :user, :password_confirmation %></label></p> <p><%= submit_tag 'Save Changes' %></p> <% end %> CHAPTER 6 ACTION PACK: WORKING WITH THE VIEW AND THE CONTROLLER
As you can see from the form_tag method, this form will submit to the update action on the events controller. We need to add the update method to our controller, so let s do that now, as shown in Listing 6-8.
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