Windows 8 Development - File Picker Introduction XAML @techytube

Uploaded December 2012 | Updated September 2026, 2 weeks ago

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In the start of the new section of the XAML tutorial, we'll be looking at file access.

File access is an important part of any application, and Windows 8 introduces some new rich workflows to enhance the experience.

Tablets add some new considerations to file access, in that the file picker UI will not work if the application is in Snapped view.

In this video, I will show you how to add a file picker interaction to an event handler of a button.

References

XAML File Pickers - msdn.microsoft.com/en-us/library/windows/apps/jj655411.aspx

Windows 8 Development - File Picker Introduction XAML

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$Working with UITableViewDataSource protocol in iOS Part2 Subscribe to our channel here for notifications on new video trainings. For more videos on technology, visit our website at http://www.techytube.com. By pavel@techytube, for more from this author visit: http://www.techytube.com/author/pavel The UITableViewDataSource protocol is usually implemented by an ViewController class that mediates the applications data model for a UITableView object. The data source provides the table view object with the information it needs to construct and modify a table view. As a representative of the data model, the data source supplies minimal information about the table views appearance. The table-view objects delegate—an object adopting the UITableViewDelegate protocol—provides that information. In the last video weve discussed about the required methods of the UITableViewDelegate protocol. There are also a couple of optional methods. For example in case of Grouped-Style table-views, we have sections, and each section may have a header and a footer. To specify how many sections a table view should have, we implement the following method: - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 2; // 2 should be replaced with the number of sections we need } To specify the title of each section in a table view, we implement the following method: - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { NSString *titleOfSection; switch (section) { case 0: titleOfSection = @First Section; break; case 1: titleOfSection = @Second Section; // ... and so on, depending how many sections we must have default: titleOfSection = @No Title; break; } return titleOfSection; } For more, please visit Apples online documentation at: http://developer.apple.com/library/ios/#documentation/uikit/reference/UITableViewDataSource_Protocol/Reference/Reference.html$

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$Working with UITableViewDataSource protocol in iOS Part1 Subscribe to our channel here for notifications on new video trainings. For more videos on technology, visit our website at http://www.techytube.com. By pavel@techytube, for more from this author visit: http://www.techytube.com/author/pavel The UITableViewDataSource protocol is usually implemented by an ViewController class that mediates the applications data model for a UITableView object. The data source provides the table view object with the information it needs to construct and modify a table view. As a representative of the data model, the data source supplies minimal information about the table views appearance. The table-view objects delegate—an object adopting the UITableViewDelegate protocol—provides that information. The two required methods of the protocol provide the cells to be displayed by the table-view as well as inform the UITableView, and they should look as below: - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return 3; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @Cell; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; } return cell; } We can also set the cells properties, for example: cell.textLabel.text = [NSString stringWithFormat:@Cell %d, indexPath.row]; Many methods take NSIndexPath objects as parameters. UITableView declares a category on NSIndexPath that enables you to get the represented row index (row property) and section index (section property), and to construct an index path from a given row index and section index (indexPathForRow:inSection: class method). (The first index in each index path identifies the section and the next identifies the row.) For more, please visit Apples online documentation at: http://developer.apple.com/library/ios/#documentation/uikit/reference/UITableViewDataSource_Protocol/Reference/Reference.html$

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Windows 8 Development - File Picker Introduction XAML