UWP将zip文件保存到磁盘

Question

我有一个用HTML / Javascript编写的UWP应用程序，我无法保存由JSZip制作的zip文件。 特别是把它写到磁盘是我挂断的地方。

我在Microsoft文档中看到有WriteBufferAsync，WriteBytesAsync，WriteLinesAsync和WriteTextAsync。 我不确定我需要哪一个。 此外，JSZip可以生成不同的类型，如base64，binarystring，uint8array，arraybuffer和blob。 我只是不确定我需要将此zip文件写入用户磁盘的组合。

以下是我的代码：

savePNGButton.addEventListener('click', function (e) {
  var zip = new JSZip();
  if (WatermarkText === ""){
    ZipFolder = zip.folder("ImageFolder");
  } else {
    ZipFolder = zip.folder(WatermarkText);
  }
  $(".WatermarkPhoto").each(function(index) {
   imgsrc = this.src;
   var DataURL = imgsrc.replace('data:image/png;base64,', '');
   ZipFolder.file(WatermarkText + index + ".png", DataURL, { base64: true });

  });
  zip.generateAsync({ type:"blob"})
      .then(function (content) {
          console.log(content);
          var savePicker = new Windows.Storage.Pickers.FileSavePicker();
          savePicker.suggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.documentsLibrary;
          savePicker.fileTypeChoices.insert("ZIP archive", [".zip"]);
          savePicker.suggestedFileName = WatermarkText+".zip";
          savePicker.pickSaveFileAsync().then(function (file) {
              if (file) {
                  Windows.Storage.CachedFileManager.deferUpdates(file);
                  Windows.Storage.FileIO.writeTextAsync(file, content).done(function () {
                      Windows.Storage.CachedFileManager.completeUpdatesAsync(file).done(function (updateStatus) {
                          if (updateStatus === Windows.Storage.Provider.FileUpdateStatus.complete) {
                              console.log("File " + file.name + " was saved.");
                          } else {
                              console.log("File " + file.name + " couldn't be saved.");
                          }
                      });
                  });
              } else {
                  console.log("Operation cancelled.");
              }
          });
      });
});

Answer 1

如果有人遇到这个，我发现这个链接让我按正确的方向发送了https://blog.appliedis.com/2013/09/18/zipping-and-unzipping-files-in-a-winjs-application/ I使用了来自JSZip的uint8array以及来自windows FileIO类的文件流和WriteBytesAsync。 下面是我用来压缩和显示文件保存对话框的最后一段代码。

savePNGButton.addEventListener('click', function (e) {
  var zip = new JSZip();
  if (WatermarkText === ""){
    ZipFolder = zip.folder("Images");
  } else {
    ZipFolder = zip.folder(WatermarkText);
  }
  $(".WatermarkPhoto").each(function(index) {
   imgsrc = this.src;
   var DataURL = imgsrc.replace('data:image/png;base64,', '');
   ZipFolder.file(WatermarkText + index + ".png", DataURL, { base64: true });

  });

  zip.generateAsync({ type: "uint8array", streamFiles:"true"})
      .then(function (content) {
          console.log(content);
              var savePicker = new Windows.Storage.Pickers.FileSavePicker();
              savePicker.suggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.documentsLibrary;
              savePicker.fileTypeChoices.insert("ZIP archive", [".zip"]);
              savePicker.suggestedFileName = WatermarkText + ".zip";
              savePicker.pickSaveFileAsync().then(function (file) {
                  if (file) {
                      Windows.Storage.CachedFileManager.deferUpdates(file);
                      Windows.Storage.FileIO.writeBytesAsync(file, content).done(function () {
                          Windows.Storage.CachedFileManager.completeUpdatesAsync(file).done(function (updateStatus) {
                              if (updateStatus === Windows.Storage.Provider.FileUpdateStatus.complete) {
                                  console.log("File " + file.name + " was saved.");
                              } else {
                                  console.log("File " + file.name + " couldn't be saved.");
                              }
                          });
                      });
                  } else {
                      console.log("Operation cancelled.");
                  }
              });
      });
});