FileExtensionVector FileExtensionVector FileExtensionVector FileExtensionVector FileExtensionVector Class

Definition

Represents a random-access collection of file name extensions.

public : sealed class FileExtensionVector : IIterable<Platform::String>, IVector<Platform::String>
struct winrt::Windows::Storage::Pickers::FileExtensionVector : IIterable<Platform::String>, IVector<Platform::String>
public sealed class FileExtensionVector : IEnumerable<String>, IList<String>
Public NotInheritable Class FileExtensionVector Implements IEnumerable<String>, IList<String>
// This class does not provide a public constructor.
Attributes
Windows 10 requirements
Device family
Windows 10 (introduced v10.0.10240.0)
API contract
Windows.Foundation.UniversalApiContract (introduced v1)

Examples

The File picker sample demonstrates how to specify the file types that the user can see and pick from in the file picker.

FileOpenPicker openPicker = new FileOpenPicker();
openPicker.ViewMode = PickerViewMode.Thumbnail;
openPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
openPicker.FileTypeFilter.Add(".jpg");
openPicker.FileTypeFilter.Add(".jpeg");
openPicker.FileTypeFilter.Add(".png");
// Create the picker object and set options
var openPicker = new Windows.Storage.Pickers.FileOpenPicker();
openPicker.viewMode = Windows.Storage.Pickers.PickerViewMode.thumbnail;
openPicker.suggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.picturesLibrary;
// Users expect to have a filtered view of their folders depending on the scenario.
// For example, when choosing a documents folder, restrict the filetypes to documents for your application.
openPicker.fileTypeFilter.replaceAll([".png", ".jpg", ".jpeg"]);
FileOpenPicker openPicker = new FileOpenPicker();
openPicker.ViewMode = PickerViewMode.List;
openPicker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
openPicker.FileTypeFilter.Add("*");
var openPicker = new Windows.Storage.Pickers.FileOpenPicker();
openPicker.viewMode = Windows.Storage.Pickers.PickerViewMode.list;
openPicker.suggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.documentsLibrary;
openPicker.fileTypeFilter.replaceAll(["*"]);

Remarks

Collection member lists

For JavaScript, FileExtensionVector has the members shown in the member lists. In addition, FileExtensionVector supports a length property, members of Array.prototype, and using an index to access items.

Enumerating the collection in C# or Microsoft Visual Basic

A FileExtensionVector is enumerable, so you can use language-specific syntax such as foreach in C# to enumerate the items in the collection. The compiler does the type-casting for you and you won't need to cast to IEnumerable<String> explicitly. If you do need to cast explicitly, for example if you want to call GetEnumerator, cast to IEnumerable<T> with a String constraint.

Properties

Item[Int32] Item[Int32] Item[Int32] Item[Int32] Item[Int32]

Gets or sets the element at the specified index.

Size Size Size Size Size

Gets the number of file name extensions in the collection.

Methods

Append(String) Append(String) Append(String) Append(String) Append(String)

Appends a file name extension to the end of the collection.

Clear() Clear() Clear() Clear() Clear()

Removes all file name extensions from the collection.

First() First() First() First() First()

Retrieves an iterator that iterates through the file name extensions in the collection.

GetAt(UInt32) GetAt(UInt32) GetAt(UInt32) GetAt(UInt32) GetAt(UInt32)

Retrieves the file name extension at the specified index in the collection.

GetEnumerator() GetEnumerator() GetEnumerator() GetEnumerator() GetEnumerator()

Returns an enumerator that iterates through the collection.

GetMany(UInt32, String[]) GetMany(UInt32, String[]) GetMany(UInt32, String[]) GetMany(UInt32, String[]) GetMany(UInt32, String[])

Retrieves the file name extensions that start at the specified index in the collection.

GetView() GetView() GetView() GetView() GetView()

Retrieves an immutable view of the collection of file name extensions.

IndexOf(T) IndexOf(T) IndexOf(T) IndexOf(T) IndexOf(T)

Determines the index of a specific item in the System.Collections.Generic.IList`1.

IndexOf(String, UInt32) IndexOf(String, UInt32) IndexOf(String, UInt32) IndexOf(String, UInt32) IndexOf(String, UInt32)

Retrieves the index of a specified file name extension in the collection.

Insert(Int32, T) Insert(Int32, T) Insert(Int32, T) Insert(Int32, T) Insert(Int32, T)

Inserts an item to the System.Collections.Generic.IList`1 at the specified index.

InsertAt(UInt32, String) InsertAt(UInt32, String) InsertAt(UInt32, String) InsertAt(UInt32, String) InsertAt(UInt32, String)

Inserts a file name extension into a collection at a specified index.

RemoveAt(Int32) RemoveAt(Int32) RemoveAt(Int32) RemoveAt(Int32) RemoveAt(Int32)

Removes the System.Collections.Generic.IList`1 item at the specified index.

RemoveAt(UInt32) RemoveAt(UInt32) RemoveAt(UInt32) RemoveAt(UInt32) RemoveAt(UInt32)

Removes the file name extension at the specified index in the collection.

RemoveAtEnd() RemoveAtEnd() RemoveAtEnd() RemoveAtEnd() RemoveAtEnd()

Removes the last file name extension from the collection.

ReplaceAll(String[]) ReplaceAll(String[]) ReplaceAll(String[]) ReplaceAll(String[]) ReplaceAll(String[])

Replaces all file name extensions in the collection with the specified file name extensions.

SetAt(UInt32, String) SetAt(UInt32, String) SetAt(UInt32, String) SetAt(UInt32, String) SetAt(UInt32, String)

Sets the file name extension at the specified index of the collection.

See Also