[英]how to open 'New File Dialog' by using FileOpenPicker? (UWP)
我这样编码,
但是,这仅支持现有文件。
我想要'新文件对话',这意味着它可以获得一个路径,虽然我输入不存在的文件名。
FileOpenPicker openPicker = new FileOpenPicker();
openPicker.ViewMode = PickerViewMode.Thumbnail;
openPicker.SuggestedStartLocation = PickerLocationId.ComputerFolder;
openPicker.FileTypeFilter.Add(".csv");
StorageFile file = await openPicker.PickSingleFileAsync();
if (file != null)
{
}
else
{
}
我认为你正在寻找FileSavePicker而不是FileOpenPicker 。
语法非常相似:
StorageFile file = await savePicker.PickSaveFileAsync();
您是否有理由不想使用FileSavePicker类。 以下是MSDN文档中的示例
var savePicker = new Windows.Storage.Pickers.FileSavePicker();
savePicker.SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.DocumentsLibrary;
// Dropdown of file types the user can save the file as
savePicker.FileTypeChoices.Add("Plain Text", new List<string>() { ".txt" });
// Default file name if the user does not type one in or select a file to replace
savePicker.SuggestedFileName = "New Document";
Windows.Storage.StorageFile file = await savePicker.PickSaveFileAsync();
if (file != null)
{
// Prevent updates to the remote version of the file until
// we finish making changes and call CompleteUpdatesAsync.
Windows.Storage.CachedFileManager.DeferUpdates(file);
// write to file
await Windows.Storage.FileIO.WriteTextAsync(file, file.Name);
// Let Windows know that we're finished changing the file so
// the other app can update the remote version of the file.
// Completing updates may require Windows to ask for user input.
Windows.Storage.Provider.FileUpdateStatus status = await Windows.Storage.CachedFileManager.CompleteUpdatesAsync(file);
if (status == Windows.Storage.Provider.FileUpdateStatus.Complete)
{
this.textBlock.Text = "File " + file.Name + " was saved.";
}
else
{
this.textBlock.Text = "File " + file.Name + " couldn't be saved.";
}
}
else
{
this.textBlock.Text = "Operation cancelled.";
}
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