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How it works... in .NET Printer pdf417 2d barcode in .NET How it works...




How to generate, print barcode using .NET, Java sdk library control with example project source code free download:
How it works... use visual .net barcode pdf417 writer toembed pdf417 for .net Microsoft .NET official Website We have created pdf417 2d barcode for .NET a simple user interface that allows users to either rely on an auto-detection process or to enter the required data manually. By default, the Auto-detect settings radio button is checked, rendering the HTTP Proxy and Port labels and fields inaccessible (disabled).

If the user decides to manually enter the required information, it will check the Manual configuration radio button and the HTTP Proxy and Port labels and fields will now become enabled allowing you to enter values. If you select the Auto-detect settings again, these fields will again become disabled. This is a fairly commonly used and a well-known pattern.

In order to make it work under this Silverlight-based scenario, we need to take care of several things. Radio buttons allow only a single choice, so that the interaction is already in place and we don"t need to think about it too much. We just need to take care of two events what happens when a specific radio button is checked and what happens when it is unchecked.

. Maps, Pop-up Wi ndows, and Escaping the Browser As you can see in the recipe itself, two event handlers have been defined. The first one is dealing with the case where our rdbManual control gets selected. In that case, through the code, we will enable parts of UI and set the Label control"s color to black.

But if the user clicks on the Auto-detect settings radio button again, then the Unchecked event will get triggered on the rdbManual control (remember, only one radio button can be selected at a time, so if you select the first one, second one will get disabled automatically), and the code that has been added to the Unchecked event will be executed. The code is pretty much self-explanatory (we are just changing the IsEnabled property values), but there is a part where we are playing with the colors, and here is why. If you set the Label control"s IsEnabled property value to False, the color will still be the same (black).

So, if you want to make it resemble the rest of the user interface when it is rendered as disabled (gray tones), then you need to change the color through the code. That"s why we used the following lines of code to make it gray:. lblProxy.Foregr barcode pdf417 for .NET ound = new SolidColorBrush(Color.

FromArgb( 255, 114, 114, 114)); lblPort.Foreground = new SolidColorBrush(Color.FromArgb( 255, 114, 114, 114));.

And then to rev ert it to black, it is enabled again:. lblProxy.Foregr barcode pdf417 for .NET ound = new SolidColorBrush(Color.

FromArgb(255,0,0,0)); lblPort.Foreground = new SolidColorBrush(Color.FromArgb(255,0,0,0));.

What is FromArgb Color.FromArgb VS .NET pdf417 2d barcode is a method that enables us to create a color structure from the four ARGB components (Alpha, Red, Green, and Blue, hence, the ARGB values).

Values for each component can be from 0 to 255, as you"d expect from your previous RGB experiences.. There"s more... Usually this pa PDF 417 for .NET ttern is implemented by showing all the UI to the end users but enabling only those UI parts that the users might be interacting with at the start. Depending on a user"s progress or selections, we enable or disable other UI parts.

Be sure to clearly mark and identify those parts of the UI that have been disabled by treating them visually graying out the areas or font colors and utilizing the similar techniques available. What is the main benefit that is being achieved by using this pattern Without question, there are at least two major reasons for using this pattern in a given context. Firstly, it will enable users to see all of the options available to them before they actually make any choice, and secondly, it will help them stay focused on the only options that are available to them at a given moment.

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