31 lines
1.1 KiB
C#
31 lines
1.1 KiB
C#
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using System;
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using System.Threading.Tasks;
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using Windows.Security.Cryptography;
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using Windows.Storage;
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using Windows.Storage.Pickers;
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using Microsoft.ReactNative.Managed;
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namespace SheetJSWin {
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[ReactModule]
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class DocumentPicker {
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private ReactContext context;
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[ReactInitializer]
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public void Initialize(ReactContext reactContext) { context = reactContext; }
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[ReactMethod("PickAndRead")]
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public async void PickAndRead(IReactPromise<string> result) {
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context.Handle.UIDispatcher.Post(async() => { try {
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var picker = new FileOpenPicker();
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picker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
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picker.FileTypeFilter.Add(".xlsx");
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picker.FileTypeFilter.Add(".xls");
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var file = await picker.PickSingleFileAsync();
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if(file == null) throw new Exception("File not found");
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var buf = await FileIO.ReadBufferAsync(file);
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result.Resolve(CryptographicBuffer.EncodeToBase64String(buf));
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} catch(Exception e) { result.Reject(new ReactError { Message = e.Message }); }});
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}
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}
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}
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