He can email a. I initially thought it was ok until you said something. This article covers the addition of the file upload feature. It provides the ability to upload a file by simply dropping it on the folder details panel on the right hand side of the application. This is what the folder details looks like when you are viewing the files in the selected folder:.
After the upload process is complete, the uploaded file s will immediately show. You can simply click on a file to download it:. The Programmer makes changes to the code any file except files with the.
If you have source control you would simply check in the changes and the Designer would check them out. To implement the UI for the upload functionality, the Designer opens up the project in Microsoft Expression Blend 4 or higher , and implements the following:.
This means that the behavior will fire when the LayoutRoot is first loaded. Next, the Designer selects the DataBind button next to Command. We need to hook into the mouse over and drop events on the element.
This is normally easy to to implement in code behind. With View Model Style you do not want to use code behind because the Designer is not able to easily use Blend to alter the design without touching the code.
Some would argue that this is tying the ViewModel to the View. However, we are simply just passing a parameter. The SetDropUIElementCommand , that accepts the parameter, does not know exactly what element will be used as a drop point. In this case, the parameter type is UIElement. The View by definition is composed of UIElements. The Designer could use a ScrollBox initially and later change it to a rectangle without any code changes. To indicate what element will be used for the drop point, the Advanced options button next to CommandParameter is clicked.
I have used this code several times before, for modules on DNN Silverlight. In the original project, he has a full featured upload control. The management of this upload client consumes most of the code in the original solution.
The objective that I had was to reduce the code, to just the elements required for uploading files, and to restructure it so that it works with the View Model Style pattern. Here is the complete code used to allow the Designer to register a UIElement as a drop point:. When the FileUpload status changes for example when it is complete the following method is raised. If the upload is complete, the SetFiles SelectedSilverlightFolder call refreshes the current list of files, and causes the uploaded file s to display in the file list.
FileDrop sets the droppable permission to the panel. Now for each dropped file, you can check whether it is a supported image file. If so, proceed further to add it to the wrap panel. See the sample code:. Here IsSupportedImageFile method takes the extension of the dropped file as a parameter which will check whether it is a valid image format. I used. The CreateImage method creates an object of the image from the FileStream of the dropped file.
Now after writing this code, your application will be ready to get external file droppable inside it. You will see that the dropped images are automatically added inside your panel. This is a good example of accessing external files droppable inside your web application.
So what next? I think from the above example, you will get the idea of what we can achieve from this. He is currently working in an MNC located in India. He posts his findings, articles, tutorials in his technical blog www.
Sign in Email. Subscribe to our Free Newsletter: Subscribe. TypeScript Tutorial for Absolute Beginners. Microsoft Azure Portal Tips and Tricks. GetData DataFormats. FileDrop as FileInfo []; Now for each dropped file you can check whether it is a supported image file. If so, proceed further to add it to the wrap panel.
Name ; imagePlaceHolder. I used. The CreateImage method creates an object of the image from the FileStream of the dropped file. Next ». Downloads Windows Visual Studio
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