ClemensFischer/XAML-Map-Control
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TileSource/TileImageLoader

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ClemensFischer 2025-11-13 17:06:33 +01:00
parent cb8fff0dd1
commit 4912fa1e40
3 changed files with 37 additions and 66 deletions
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41
MBTiles/Shared/MBTileSource.cs
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@ -24,8 +24,6 @@ namespace MapControl.MBTiles
public IDictionary<string, string> Metadata { get; } = new Dictionary<string, string>();
public override bool Cacheable => false;
public async Task OpenAsync(string file)
{
Close();
@ -34,14 +32,13 @@ namespace MapControl.MBTiles
await connection.OpenAsync();
using (var command = new SQLiteCommand("select * from metadata", connection))
{
var reader = await command.ExecuteReaderAsync();
using var command = new SQLiteCommand("select * from metadata", connection);
while (await reader.ReadAsync())
{
Metadata[(string)reader["name"]] = (string)reader["value"];
}
var reader = await command.ExecuteReaderAsync();
while (await reader.ReadAsync())
{
Metadata[(string)reader["name"]] = (string)reader["value"];
}
}
@ -66,18 +63,17 @@ namespace MapControl.MBTiles
try
{
using (var command = new SQLiteCommand("select tile_data from tiles where zoom_level=@z and tile_column=@x and tile_row=@y", connection))
using var command = new SQLiteCommand("select tile_data from tiles where zoom_level=@z and tile_column=@x and tile_row=@y", connection);
command.Parameters.AddWithValue("@z", zoomLevel);
command.Parameters.AddWithValue("@x", x);
command.Parameters.AddWithValue("@y", (1 << zoomLevel) - y - 1);
var buffer = (byte[])await command.ExecuteScalarAsync();
if (buffer?.Length > 0)
{
command.Parameters.AddWithValue("@z", zoomLevel);
command.Parameters.AddWithValue("@x", x);
command.Parameters.AddWithValue("@y", (1 << zoomLevel) - y - 1);
var buffer = (byte[])await command.ExecuteScalarAsync();
if (buffer?.Length > 0)
{
image = await LoadImageAsync(buffer);
}
image = await ImageLoader.LoadImageAsync(buffer);
}
}
catch (Exception ex)
@ -87,10 +83,5 @@ namespace MapControl.MBTiles
return image;
}
public override Uri GetUri(int zoomLevel, int column, int row)
{
throw new NotSupportedException();
}
}
}