Note
For the sake of better readability, exception handling is ommitted in the example.
FolkerKinzel.DataUrls
Data
Tries to parse a String that represents a "data" URL in order to make its content available
as DataUrlInfo.
Definition
Namespace: FolkerKinzel.DataUrls
Assembly: FolkerKinzel.DataUrls (in FolkerKinzel.DataUrls.dll) Version: 1.0.0+b1c843815044ca6fd87a144c9ff16386002c6473
true if value could be parsed as DataUrlInfo, otherwise false.
Assembly: FolkerKinzel.DataUrls (in FolkerKinzel.DataUrls.dll) Version: 1.0.0+b1c843815044ca6fd87a144c9ff16386002c6473
C#
public static bool TryParse(
string? value,
out DataUrlInfo? info
)VB
Public Shared Function TryParse (
value As String,
<OutAttribute> ByRef info As DataUrlInfo
) As BooleanC++
public:
static bool TryParse(
String^ value,
[OutAttribute] DataUrlInfo% info
)F#
static member TryParse :
value : string *
info : DataUrlInfo byref -> bool Parameters
- value String
- The String to parse.
- info DataUrlInfo
- If the method returns true, the parameter contains a DataUrlInfo structure that provides the contents of the "data" URL. The parameter is passed uninitialized.
Return Value
Booleantrue if value could be parsed as DataUrlInfo, otherwise false.
Example
Creating and parsing a "data" URL:
C#
using FolkerKinzel.DataUrls;
using FolkerKinzel.DataUrls.Extensions;
using System.Diagnostics;
namespace Examples;
public static class DataUrlExample
{
public static void Example()
{
// Creates a temporary JPG file for testing.
string photoFilePath = CreatePhotoFile();
// Creates a "data" URL string from the file.
// The MIME type comes from the file type extension
// (if not provided as argument):
string dataUrl = DataUrl.FromFile(photoFilePath);
// (The photo file is no longer needed.)
File.Delete(photoFilePath);
// Uncomment this to show the content of the
// "data" URL in the Microsoft Edge browser.
// (Make shure you have this browser installed.):
// ShowPictureInMicrosoftEdge(dataUrl);
Console.WriteLine(dataUrl);
Console.WriteLine();
Console.WriteLine("Is \"data\" URL: {0}", dataUrl.IsDataUrl());
Console.WriteLine();
// Parse the content of the "data" URL:
_ = DataUrl.TryParse(dataUrl, out DataUrlInfo info);
Console.WriteLine("Data Type: {0}", info.DataType);
Console.WriteLine("MIME Type: {0}", info.MimeType);
Console.WriteLine("File Type Ext.: {0}", info.GetFileTypeExtension());
Console.WriteLine("Data Encoding: {0}", info.Encoding);
Console.WriteLine();
if (info.TryGetData(out EmbeddedData data))
{
// EmbeddedData is a union that contains either a
// byte array or a string.
Console.WriteLine(data);
}
}
/// <summary>
/// Creates a temporary photo file. The data comes from a given "data" URL.
/// </summary>
/// <returns>The file path.</returns>
private static string CreatePhotoFile()
{
const string url = "data:image/jpeg;base64,/9j/4QAYRXhpZgAASUkqAAgAAAAAAAAAAAAAAP/sABFEdWNreQABAAQAAABLAAD/4QM1aHR0cDovL25zLmFkb2JlLmNvbS94YXAvMS4wLwA8P3hwYWNrZXQgYmVnaW49Iu+7vyIgaWQ9Ilc1TTBNcENlaGlIenJlU3pOVGN6a2M5ZCI/PiA8eDp4bXBtZXRhIHhtbG5zOng9ImFkb2JlOm5zOm1ldGEvIiB4OnhtcHRrPSJBZG9iZSBYTVAgQ29yZSA1LjYtYzE0NSA3OS4xNjIzMTksIDIwMTgvMDIvMTUtMjA6Mjk6NDMgICAgICAgICI+IDxyZGY6UkRGIHhtbG5zOnJkZj0iaHR0cDovL3d3dy53My5vcmcvMTk5OS8wMi8yMi1yZGYtc3ludGF4LW5zIyI+IDxyZGY6RGVzY3JpcHRpb24gcmRmOmFib3V0PSIiIHhtbG5zOnhtcD0iaHR0cDovL25zLmFkb2JlLmNvbS94YXAvMS4wLyIgeG1sbnM6eG1wTU09Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC9tbS8iIHhtbG5zOnN0UmVmPSJodHRwOi8vbnMuYWRvYmUuY29tL3hhcC8xLjAvc1R5cGUvUmVzb3VyY2VSZWYjIiB4bXA6Q3JlYXRvclRvb2w9IkFkb2JlIFBob3Rvc2hvcCBFbGVtZW50cyAxNy4wIChXaW5kb3dzKSIgeG1wTU06SW5zdGFuY2VJRD0ieG1wLmlpZDoyMzQ2NjhFMTA5OTExMUVDODNGQ0U1Q0EzN0JFMDUxNSIgeG1wTU06RG9jdW1lbnRJRD0ieG1wLmRpZDoyMzQ2NjhFMjA5OTExMUVDODNGQ0U1Q0EzN0JFMDUxNSI+IDx4bXBNTTpEZXJpdmVkRnJvbSBzdFJlZjppbnN0YW5jZUlEPSJ4bXAuaWlkOjIzNDY2OERGMDk5MTExRUM4M0ZDRTVDQTM3QkUwNTE1IiBzdFJlZjpkb2N1bWVudElEPSJ4bXAuZGlkOjIzNDY2OEUwMDk5MTExRUM4M0ZDRTVDQTM3QkUwNTE1Ii8+IDwvcmRmOkRlc2NyaXB0aW9uPiA8L3JkZjpSREY+IDwveDp4bXBtZXRhPiA8P3hwYWNrZXQgZW5kPSJyIj8+/+4ADkFkb2JlAGTAAAAAAf/bAIQAAwICAgICAwICAwUDAwMFBQQDAwQFBgUFBQUFBggGBwcHBwYICAkKCgoJCAwMDAwMDA4ODg4OEBAQEBAQEBAQEAEDBAQGBgYMCAgMEg4MDhIUEBAQEBQREBAQEBARERAQEBAQEBEQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQ/8AAEQgAMAAwAwERAAIRAQMRAf/EAIgAAAIDAQEBAAAAAAAAAAAAAAUGAwQHAQIIAQACAwEBAAAAAAAAAAAAAAACBAMFBgEAEAACAQMEAgEEAQEJAAAAAAABAgMRBAUAIRIGMQdBUSIyE3FhgZHBQmIjFRYXEQACAgEEAQIEBwAAAAAAAAABAgADESExEgRBURORoTIF8GFxgcEiFP/aAAwDAQACEQMRAD8AVLtsW4uLFMdaLcpNHjjIhnSVZbkmWPiWYH58n+NU5Dn8eksgyCZ++Sy2Kv7uwvv2yCBpYZLfmCfsqCAa00s6ZGRH07DbHWIM/uXrGBEkFjFNkLmGUCW1YMVgjY1JUg7mvxXTIRiJCpA28fKQ3fuT1/fsxurHIYuZgK5UxtwJb8qgkinwNtHwYeIDBTuCJonQru9uL+0kwl409nOyGG6/YxjkjI5b/K1PkaW46kes4AQcx37DispfXkDW0skjtc8YkkUTLCHcCoBFAanbf+3XK2ZQJNYA+cxt6xmZL/uw65n+sSJZ3UqmDKhAyBwD+uS4DD8lAp5+3401xPHOYiDrjEZPc/X8D03033XtmKFrLkrWxuXQlFeQTXDLDyUg1qvPlpbOcCT4I8Tvpb1x62wXRcVhbrD2k8r28Ul7d3SIXuLiRAzuzMN+ROquy5i51m669AWocRHftGC9f3uM/wCJmxNjLEUMRt0jioEIpQCmoXc50jPt6HlPibpVr/577h7R68tpXWxx5F7jYnFeMUjjjw/0gPTVxy51Kx/SYy1OFzL+80+HsMk969HP+zOgPkE8SD4/x0uBB9YKm7D7EvBK8tjkDcszKlYJUUgnbdqeNGbVzK8Wr+fwnlrTvubxl5gs3j7p4MjA1gV5xngsgKljybwCQa0OonuA1EZqZTYFbIBIGY7X/SbS1jxGSzHbJMYYhBHFbHikURRVV+bsSQoANQdtJMwLajeb2nrsFznaSJ1DpXYe35G7se5PPWSQQiCVHhaFT+AqPyX5A8edACBpjQxg0FxnyIG7j6yXIdgyHesSY58hDDa4u2vbqRYUaONi3Co2BK7kkGumEuKjB+n+ZQ9+ilKmsP1ggCCLfpvcXl4vfYscmDcjdkkb7qQqeNF/or9Zl2vPjHxhe4uokkYSTogcseTy7rQ0psTWulyqwhQsqWmYsknSSW9hjbf8XJ3XdSNcKjG0JaVBlq3xtr364nMeTdL11KmRHRknQEGROMqsBX520K6Pmbbpdj3KgpMvX/r2y63brlMxdOiWu2OsBNEsQkbfkP1IpJI81Opbm/rH9K9RFPNdvs7d5LaWa4SRf1tBFC44OrAEEoQdz9fpryVuQNN5jfuN4Llc6CVoe3xC7EbWkjREqrc5nFVPnZQN6aP2XztKvkspthpzd3EQAaNCAHM0cZBkO9VYEnVmnW5RbnidyvW4MU6tLfAkKQkaKGc7bAeAN/JP92nR9uB86SD34vf9mtcFmLDBZNza2uU5Lb3qtxa2vdihLCn2uPtP9aai7n24e3mvcfMSy+3d0pZxbY/Iw5dLHi1us33G9uJrXGI0k6zuzNQeI15GlXNAKaz9dLuwVdzNRd2QqlmOgid0fM3vZLO/7ZmYkkmvryadYW2VIoyI1RNxQKooNbpKERAmNBMBbczuXO5jpZY/A5O4SWG4ltzKyndv2R0r8A0O/wDOoD1E8TvumTZrtkcvYMrHj7f9KLM8aAAM1I2KNVqD/MD8al63E1K2MEiRMzbGBppry4pJICxetaqT/XTEGZz7nx2QvOqJPBzWWC4j5ycTyCSVRqbbedCd56IPae++wuz9Qw3UcvkJjHgiUhRFKvcqKmKSdwKu0a/YK/FPnfSyddUcsBqY3Z2HesKToJr/AE7FX2O6li8dJG0kq26PLUEVeT72rT+dNxSMNq10iJOUKtyWi0JFFIH0+uvTs//Z";
string path = "";
// Tries to get the embedded data as Byte array
// (and an appropriate file type extension too):
if (DataUrl.TryGetBytes(url,
out byte[]? bytes,
out string? fileTypeExtension) && bytes.Length > 0)
{
path = Path.Combine(
Directory.GetCurrentDirectory(), $"{Guid.NewGuid()}{fileTypeExtension}");
File.WriteAllBytes(path, bytes);
}
return path;
}
/// <summary>
/// Displays the content of a "data" URL in the Edge browser.
/// </summary>
/// <param name="dataUrl">The "data" URL.</param>
private static void ShowPictureInMicrosoftEdge(string dataUrl)
{
var process = new Process();
process.StartInfo.UseShellExecute = true;
process.StartInfo.FileName = "msedge";
process.StartInfo.Arguments = dataUrl;
_ = process.Start();
}
}
/*
Console Output:
data:image/jpeg;base64,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
Is "data" URL: True
Data Type: Binary
MIME Type: image/jpeg
File Type Ext.: .jpg
Data Encoding: Base64
System.Byte[]: 2472 Bytes
*/