WebView.BuildLocalStreamUri(String, String) Metode
Definisi
Penting
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Membuat URI yang dapat Anda lewati ke NavigateToLocalStreamUri.
public:
virtual Uri ^ BuildLocalStreamUri(Platform::String ^ contentIdentifier, Platform::String ^ relativePath) = BuildLocalStreamUri;
Uri BuildLocalStreamUri(winrt::hstring const& contentIdentifier, winrt::hstring const& relativePath);
public System.Uri BuildLocalStreamUri(string contentIdentifier, string relativePath);
function buildLocalStreamUri(contentIdentifier, relativePath)
Public Function BuildLocalStreamUri (contentIdentifier As String, relativePath As String) As Uri
Parameter
- contentIdentifier
-
String
Platform::String
winrt::hstring
Pengidentifikasi unik untuk konten yang dirujuk URI. Ini mendefinisikan akar URI.
- relativePath
-
String
Platform::String
winrt::hstring
Jalur ke sumber daya, relatif terhadap akar.
Mengembalikan
URI dibuat dengan menggabungkan dan menormalkan contentIdentifier dan relativePath.
Contoh
Contoh kode berikut menunjukkan cara menggunakan metode ini dengan resolver yang akan menyajikan file dari paket aplikasi. Untuk contoh lengkapnya, lihat sampel kontrol XAML WebView.
public sealed partial class TestPage : Page
{
// ... other code ...
protected override void OnNavigatedTo(NavigationEventArgs e)
{
// The 'Host' part of the URI for the ms-local-stream protocol needs to be a combination of the package name
// and an application-defined key, which identifies the specific resolver, in this case 'MyTag'.
Uri url = webView4.BuildLocalStreamUri("MyTag","/Minesweeper/default.html");
StreamUriWinRTResolver myResolver = new StreamUriWinRTResolver();
// Pass the resolver object to the navigate call.
webView4.NavigateToLocalStreamUri(url, myResolver);
}
}
public sealed class StreamUriWinRTResolver : IUriToStreamResolver
{
public IAsyncOperation<IInputStream> UriToStreamAsync(Uri uri)
{
if (uri == null)
{
throw new Exception();
}
string path = uri.AbsolutePath;
// Because of the signature of the this method, it can't use await, so we
// call into a separate helper method that can use the C# await pattern.
return GetContent(path).AsAsyncOperation();
}
private async Task<IInputStream> GetContent(string path)
{
// We use a package folder as the source, but the same principle should apply
// when supplying content from other locations
try
{
Uri localUri= new Uri("ms-appx:///html" + path);
StorageFile f = await StorageFile.GetFileFromApplicationUriAsync(localUri);
IRandomAccessStream stream = await f.OpenAsync(FileAccessMode.Read);
return stream.GetInputStreamAt(0);
}
catch (Exception) { throw new Exception("Invalid path"); }
}
}