Windows 8 Store Apps Learning (25) Selector: File Selection window, etc.

Selector: File Selection window, folder Selection window, File Save window

Introduced

Re-imagine the Windows 8 Store Apps Selector

Fileopenpicker-Select a file or multiple files

Folderpicker-Select a folder

Filesavepicker-Save file to specified path

Example

1. Demonstrates how to select a file or multiple files by Fileopenpicker

Picker/fileopenpickerdemo.xaml

<page
    x:class= "XamlDemo.Picker.FileOpenPickerDemo"
    xmlns= "http://schemas.microsoft.com/winfx/2006/ Xaml/presentation "
    xmlns:x=" Http://schemas.microsoft.com/winfx/2006/xaml "
    xmlns:local=" using: Xamldemo.picker "
    xmlns:d=" http://schemas.microsoft.com/expression/blend/2008 "
    xmlns:mc=" http:// schemas.openxmlformats.org/markup-compatibility/2006 "
    mc:ignorable=" D ">
    
    <grid background=" Transparent ">
        <stackpanel margin=" 0 0 0 ">
                
            <textblock name=" lblmsg "fontsize=" 14.667 "/>
                
            <button name= "Btnpickfile" content= "Pick a file" click= "Btnpickfile_click_1" margin= "0 0 0"/>
    
            < Button Name= "Btnpickfiles" content= "Pick Multiple Files" click= "Btnpickfiles_click_1" margin= "0 0 0"/> </
    
        stackpanel>
    </Grid>
</Page>

Picker/fileopenpickerdemo.xaml.cs

* * Demonstrates how to select a file or multiple files through Fileopenpicker * fileopenpicker-File Selection window * ViewMode-File Selection window view mode, Windows.Storage.Pick ERs. Pickerviewmode enumeration (List or Thumbnail) * suggestedstartlocation-the initial path displayed by the File Selection window, Windows.Storage.Pickers.PickerLocationI D enumeration * Documentslibrary, Computerfolder, Desktop,, Downloads, HomeGroup, Musiclibrary, PICTURESLIBRARY,VIDEOSLIBR ARY * Filetypefilter-allows display of the file type collection in the File Selection window * Commitbuttontext-the display text of the submit button for the File Selection window, which displays the text "open" by default * PICKSINGL
Efileasync ()-Pop-up File Selection window to allow users to select a file * Pickmultiplefilesasync ()-Pop-up File Selection window to allow users to select multiple files/using System;
Using System.Collections.Generic;
Using Windows.storage;
Using Windows.Storage.AccessCache;
Using Windows.Storage.Pickers;
Using Windows.UI.Xaml;
    
Using Windows.UI.Xaml.Controls; Namespace Xamldemo.picker {public sealed partial class Fileopenpickerdemo:page {public fileopenpickerd Emo () {this.
        InitializeComponent (); Private AsyNC void Btnpickfile_click_1 (object sender, RoutedEventArgs e) {if (XamlDemo.Common.Helper.EnsureUnsna
                Pped ()) {//Select a file Fileopenpicker openpicker = new Fileopenpicker ();
                Openpicker.commitbuttontext = "Select this file";
                Openpicker.viewmode = Pickerviewmode.thumbnail;
                Openpicker.suggestedstartlocation = pickerlocationid.pictureslibrary;
                OPENPICKER.FILETYPEFILTER.ADD (". jpg");
                OPENPICKER.FILETYPEFILTER.ADD (". gif");
    
                OPENPICKER.FILETYPEFILTER.ADD (". png"); Pop-up file Selection window Storagefile file = await openpicker.picksinglefileasync (); When the user completes the operation in the File Selection window, it returns the corresponding Storagefile object if (file!= null) {lblmsg. Text = "Selected files:" + file.
                Name;
                else {lblmsg.text = "canceled";
     }
            }   Private async void Btnpickfiles_click_1 (object sender, RoutedEventArgs e) {if (Xam  LDemo.Common.Helper.EnsureUnsnapped ()) {//Select multiple files Fileopenpicker openpicker =
                New Fileopenpicker ();
                Openpicker.viewmode = pickerviewmode.list;
                Openpicker.suggestedstartlocation = pickerlocationid.documentslibrary;
    
                OPENPICKER.FILETYPEFILTER.ADD ("*"); Pop-up file Selection window ireadonlylist<storagefile> files = await openpicker.pickmultiplefilesasync (); When the user completes the operation in the File Selection window, it returns the corresponding Storagefile object if (files).
                    Count > 0) {lblmsg.text = "selected file:";
                    Lblmsg.text + = Environment.NewLine; foreach (Storagefile file in files) {Lblmsg.text = = (file.
                        Name);
           Lblmsg.text + = Environment.NewLine;         } else {lblmsg.text = "canceled"; }
            }
        }
    }
}