docs.sheetjs.com/docz/static/reactnative/DocumentPicker.h

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2023-05-11 21:28:29 +00:00
#pragma once
#include <winrt/Windows.Storage.Pickers.h>
#include <winrt/Windows.Security.Cryptography.h>
#include "NativeModules.h"
using namespace winrt::Microsoft::ReactNative;
using namespace winrt::Windows::Storage;
using namespace winrt::Windows::Storage::Pickers;
using namespace winrt::Windows::Security::Cryptography;
namespace SheetJSWin {
REACT_MODULE(DocumentPicker);
struct DocumentPicker {
REACT_INIT(Initialize);
void Initialize(const ReactContext& reactContext) noexcept {
context = reactContext;
}
REACT_METHOD(PickAndRead);
void PickAndRead(ReactPromise<winrt::hstring> promise) noexcept {
auto prom = promise;
context.UIDispatcher().Post([prom = std::move(prom)]()->winrt::fire_and_forget {
auto p = prom;
FileOpenPicker picker;
picker.SuggestedStartLocation(PickerLocationId::DocumentsLibrary);
picker.FileTypeFilter().Append(L".xlsx");
picker.FileTypeFilter().Append(L".xls");
StorageFile file = co_await picker.PickSingleFileAsync();
if(file == nullptr) { p.Reject("File not Found"); co_return; }
auto buf = co_await FileIO::ReadBufferAsync(file);
p.Resolve(CryptographicBuffer::EncodeToBase64String(buf));
co_return;
});
}
private:
ReactContext context{nullptr};
};
}