/// <summary>
/// Reads an image from the system file and converts it to its base 64 representation with its data uri format ready to be embed.
/// This method specs that the resource is an image type compatible with pdfmake.
/// JPEG and PNG formats are supported.
/// </summary>
/// <param name="path"></param>
/// <param name="sourceImageFormat"></param>
/// <returns></returns>
public static string LoadImageFromPath(string path, SourceImageFormat sourceImageFormat)
{
var byteArray = File.ReadAllBytes(path);
var base64StringImage = Convert.ToBase64String(byteArray);
return($"data:{sourceImageFormat.GetMimeType()};base64,{base64StringImage}");
}
public static string GetMimeType(this SourceImageFormat sourceImageFormat)
{
if (sourceImageFormat == SourceImageFormat.JPEG)
{
return("image/jpeg");
}
else if (sourceImageFormat == SourceImageFormat.PNG)
{
return("image/png");
}
return(null);
}
/// <summary>
/// Reads an Image from an http request and converts it to its base 64 representation with its data uri format ready to be embed.
/// This method specs that the resource is an image type compatible with pdfmake.
/// JPEG and PNG formats are supported.
/// </summary>
/// <param name="httpClient"></param>
/// <param name="httpMethod"></param>
/// <param name="requestUri"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public static async Task <string> LoadImageFromUrlAsync(HttpClient httpClient, string httpMethod, string requestUri, SourceImageFormat sourceImageFormat, CancellationToken cancellationToken)
{
var request = new HttpRequestMessage(new HttpMethod(httpMethod), requestUri);
var response = await httpClient.SendAsync(request);
var stream = await response.Content.ReadAsStreamAsync();
var byteArray = await stream.ToByteArrayAsync(cancellationToken);
var base64StringImage = Convert.ToBase64String(byteArray);
return($"data:{sourceImageFormat.GetMimeType()};base64,{base64StringImage}");
}
