C#三個平台上的檔案選擇方法

標籤：

wpf：

Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog();dlg.DefaultExt = ".txt";Nullable<bool> result = dlg.ShowDialog();if (result == true){       // Open document        string filename = dlg.FileName;}    

FileStream aFile = new FileStream(filename, FileMode.Open);            StreamReader sr = new StreamReader(aFile);

需要 using System.Windows.Documents; using System.IO;

windows app:

FileOpenPicker openPicker = new FileOpenPicker();openPicker.ViewMode = PickerViewMode.List;
openPicker.SuggestedStartLocation = PickerLocationId.Desktop;
openPicker.FileTypeFilter.Add(".txt");ss.file = await openPicker.PickSingleFileAsync();

string filename =ss.file.Path;StorageFile file =ss.file;
var fl = await FileIO.ReadLinesAsync(file);

需要：

using Windows.Storage;
using Windows.Storage.Pickers;
using System.Collections;

Windows phone：

 

FileOpenPicker openPicker = new FileOpenPicker();openPicker.ViewMode = PickerViewMode.List;openPicker.SuggestedStartLocation = PickerLocationId.Desktop;openPicker.FileTypeFilter.Add(".txt");openPicker.PickSingleFileAndContinue();

void MainPage_Activated(CoreApplicationView sender, Windows.ApplicationModel.Activation.IActivatedEventArgs args){            FileOpenPickerContinuationEventArgs continueArgs = args as FileOpenPickerContinuationEventArgs;            if (continueArgs != null)            {                ss.file = continueArgs.Files[0];                if (ss.file != null)                {                    BlankPage1 pg1 = new BlankPage1();                    ss.bl = true;                    Frame.Navigate(typeof(BlankPage1));                }                else                {                }            }}

string filename = MainPage.ss.file.Path;StorageFile file = MainPage.ss.file;var fl = await FileIO.ReadLinesAsync(file);

需要：

using Windows.Storage;
using Windows.Storage.Pickers;
using Windows.ApplicationModel.Core;
using Windows.ApplicationModel.Activation;

using System.Collections;

 

C#三個平台上的檔案選擇方法