/// <summary>
/// Fetch a snapshot of the document specified by <paramref name="documentReference"/>, with respect to this transaction.
/// This method cannot be called after any write operations have been created.
/// </summary>
/// <param name="documentReference">The document reference to fetch. Must not be null.</param>
/// <param name="cancellationToken">A cancellation token to monitor for the asynchronous operation.</param>
/// <returns>A snapshot of the given document with respect to this transaction.</returns>
public Task <DocumentSnapshot> GetSnapshotAsync(DocumentReference documentReference, CancellationToken cancellationToken = default)
{
GaxPreconditions.CheckNotNull(documentReference, nameof(documentReference));
GaxPreconditions.CheckState(_writes.IsEmpty, "Firestore transactions require all reads to be executed before all writes.");
CancellationToken effectiveToken = GetEffectiveCancellationToken(cancellationToken);
return(documentReference.GetSnapshotAsync(TransactionId, effectiveToken));
}
/// <summary>
/// Fetch a snapshot of the document specified by <paramref name="documentReference"/>, with respect to this transaction.
/// This method cannot be called after any write operations have been created.
/// </summary>
/// <param name="documentReference">The document reference to fetch. Must not be null.</param>
/// <param name="cancellationToken">A cancellation token to monitor for the asynchronous operation.</param>
/// <returns>A snapshot of the given document with respect to this transaction.</returns>
public Task <DocumentSnapshot> GetSnapshotAsync(DocumentReference documentReference, CancellationToken cancellationToken = default)
{
GaxPreconditions.CheckNotNull(documentReference, nameof(documentReference));
GaxPreconditions.CheckState(_writes.IsEmpty, "Firestore transactions require all reads to be executed before all writes.");
using (var cts = CancellationTokenSource.CreateLinkedTokenSource(CancellationToken, cancellationToken))
{
return(documentReference.GetSnapshotAsync(TransactionId, cts.Token));
}
}
public async void getSnapshot()
{
Google.Cloud.Firestore.DocumentReference docRef = db.Collection(collecName).Document(docName);
DocumentSnapshot snapshot = await docRef.GetSnapshotAsync();
if (snapshot.Exists)
{
Console.WriteLine("Document data for {0} document:", snapshot.Id);
mediaTitle.Text = "Title: " + snapshot.Id;
Dictionary <string, object> media = snapshot.ToDictionary();
foreach (KeyValuePair <string, object> pair in media)
{
Console.WriteLine("{0}: {1}", pair.Key, pair.Value);
switch (pair.Key)
{
case "Desc":
mediaDesc.Text = "Description: " + pair.Value.ToString();
break;
case "Rating":
mediaRating.Text = "Rating: " + pair.Value.ToString();
break;
}
}
}
else
{
Console.WriteLine("Document {0} does not exist!", snapshot.Id);
}
//Make Review blocks
Query query = db.Collection(collecName).Document(docName).Collection("reviews");
QuerySnapshot allReviewsQuerySnapshot = await query.GetSnapshotAsync();
string rating = "", desc = "";
foreach (DocumentSnapshot documentSnapshot in allReviewsQuerySnapshot.Documents)
{
if (documentSnapshot.Exists)
{
Dictionary <string, object> media = documentSnapshot.ToDictionary();
foreach (KeyValuePair <string, object> pair in media)
{
Console.WriteLine("{0}: {1}", pair.Key, pair.Value);
switch (pair.Key)
{
case "desc":
desc = "Description: " + pair.Value.ToString();
break;
case "rating":
rating = "Rating: " + pair.Value.ToString() + "/10";
break;
}
}
Border border = new Border();
border.MinWidth = 30;
border.MinHeight = 20;
border.Margin = new Thickness(10);
border.BorderThickness = new Thickness(5);
border.CornerRadius = new CornerRadius(5);
border.BorderBrush = new SolidColorBrush(Colors.Black);
StackPanel panel = new StackPanel();
panel.Background = new SolidColorBrush(Colors.Black);
TextBlock nameBlock = new TextBlock();
nameBlock.Background = new SolidColorBrush(Colors.Black);
nameBlock.Foreground = new SolidColorBrush(Colors.White);
nameBlock.Text = "Name: " + documentSnapshot.Id;
nameBlock.FontSize = 15;
TextBlock ratingBlock = new TextBlock();
ratingBlock.Background = new SolidColorBrush(Colors.Black);
ratingBlock.Foreground = new SolidColorBrush(Colors.White);
ratingBlock.Text = rating;
ratingBlock.FontSize = 15;
TextBlock descBlock = new TextBlock();
descBlock.Background = new SolidColorBrush(Colors.Black);
descBlock.Foreground = new SolidColorBrush(Colors.White);
descBlock.Text = desc;
descBlock.FontSize = 15;
panel.Children.Add(nameBlock);
panel.Children.Add(ratingBlock);
panel.Children.Add(descBlock);
border.Child = panel;
reviewList.Children.Add(border);
}
else
{
Console.WriteLine("Document {0} does not exist!", documentSnapshot.Id);
}
}
}