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The OpenFileDialog class displays a standard Windows, Mac, or Linux open file dialog depending on the platform that allows users to browse to files anywhere on their system. This dialog box is not available if running in Full Screen Mode. The OpenFileDialog class has Filter and FilterIndex properties, which allow you to set the file filter in much the same way a .NET developer would do in a WPF or Windows Forms application. You can specify the types of files you wish to open by specifying Filter like this: fileDlg.Filter = "Tiff Files (*.tif)|*.tif|All Files (*.*)|*.*"; This value suggests that a TIFF file is expected, but the Filter value can be overridden by the user. The format is a description of the filter, such as Tiff Files (*.tif), followed by the filter pattern, such as *.tiff. Each filter option is separated by the pipe symbol. You can also have a more generic Filter, say for all image files, by separating the filter patterns with semicolons, like this: Image Files(*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|All files (*.*)|*.*

You can set the FileIndex property to a zero-based index to configure which filter is the default; you can also allow the user to make multiple selections by setting the Multiselect property to true. The OpenFileDialog class also has a Multiselect property, which defaults to false. When set to true, it allows the user to select multiple files. The ShowDialog method displays the dialog shown in Figure 212.

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The sample code for this recipe has a button that allows the user to select files in the local file system, including instances where Multiselect is set to true. The files that are selected are listed in a ListBox control. When the user clicks the Select Files button in the test application, an Open File dialog appears with a filter configured for TIFF files, as shown in Figure 2-12. Figure 2-13 shows the test application UI after the user selects several files and clicks the Open button in the dialog.

Listing 6-9 shows the win.upload() method. win.upload() invokes the Fileupload.get() method that retrieves the image file, stores the file s content as an img object, and uses the picture.setContent() method to put this image file to the image component defined in Listing 6-8.

Clicking Open in the operating system s Open File dialog causes the ShowDialog method to return true. Clicking Cancel causes the method to return false. When it returns true, you can use the Count() method on the OpenFileDialog.Files collection to determine the number of files returned. To iterate over the selected files, you can use a foreach loop that steps through the Files collection. In the sample code, you simply add the filename to a ListBox object. However, the Files collection stores FileDialogFileInfo objects that contain two methods, OpenRead and OpenText. The OpenRead method returns a Stream object that allows a developer to read the file using a StreamReader class. The OpenText method returns a StreamReader with UTF-8 encoding that reads an existing text file. In 7, we ll cover Silverlight networking and web services that developers can use to upload a file to the server. Listings 2-9 and 2-10 show the code for the Recipe 2-4 test application.

Another thing we look for on resumes is evidence that someone has gone through some highly selective process in the past. Not everyone at Ivy League schools is worth hiring, and not everyone at community college is worth avoiding, but getting into a very selective school does at least mean that someone, somewhere judged you using some kind of selection process and decided that you were pretty smart. Our company criterion for selectivity is usually getting into a school or program that accepts less than 30% of its applicants (there are about 60 schools in the US that meet this standard), or working for a company that is known to have a difficult application process, like a whole day of interviews. Getting into highly selective courses in the military (e.g., officer s training, pilot s school, etc.) or getting into highly selective units like the Marines, indicates someone who has made it through some kind of difficult application/selection procedure, and all in all this is a positive sign.

<UserControl x:Class="Ch02_ProgrammingModel.Recipe2_4.MainPage xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="400"> <Grid x:Name="LayoutRoot"> <Grid.Background> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF000000"/> <GradientStop Color="#FFFFFFFF" Offset="1"/> </LinearGradientBrush>

</Grid.Background> <Grid.RowDefinitions> <RowDefinition Height="0.117*"/> <RowDefinition Height="0.79*"/> <RowDefinition Height="0.093*"/> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition Width="0.058*"/> <ColumnDefinition Width="0.252*"/> <ColumnDefinition Width="0.64*"/> <ColumnDefinition Width="0.05*"/> </Grid.ColumnDefinitions> <Button Height="28.9" HorizontalAlignment="Stretch" Margin="8,8,11,0" VerticalAlignment="Top" Width="81.8" Grid.Column="1" Grid.Row="1" Content="Select Files" d:LayoutOverrides="Height" x:Name="ButtonSelectFiles" Click="ButtonSelectFiles_Click"/> <TextBlock Margin="4,2,2,2" Grid.Column="1" Grid.Row="2" Text="Status" TextWrapping="Wrap" Grid.ColumnSpan="2" x:Name="StatusLabel"/> <Border Grid.Column="2" Grid.Row="1" Margin="0,0,0,0" CornerRadius="12"> <Border.Background> <LinearGradientBrush EndPoint="0.916999995708466,0.0890000015497208" StartPoint="-0.0489999987185001,2.12400007247925"> <GradientStop Color="#FF1D351E"/> <GradientStop Color="#FF1D351E" Offset="1"/> <GradientStop Color="#FFB7D8BA" Offset="0.50900000333786011"/> </LinearGradientBrush> </Border.Background> <ListBox x:Name="FileList" Foreground="#FF000000" Height="217" Width="236" Opacity="1"/> </Border> </Grid> </UserControl>

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