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C# 如何使用Xamarin.Essentials将PDF附加为电子邮件附件?_C#_Xamarin_Xamarin.forms_Syncfusion - Fatal编程技术网

C# 如何使用Xamarin.Essentials将PDF附加为电子邮件附件?

C# 如何使用Xamarin.Essentials将PDF附加为电子邮件附件?,c#,xamarin,xamarin.forms,syncfusion,C#,Xamarin,Xamarin.forms,Syncfusion,我正在使用詹姆斯·蒙特马诺(James Montemagno)的本教程,介绍如何在使用IEmailService时附加文档。如何将Syncfusion PDF文档作为电子邮件附件附加 using (MyTestPdfDocument document = new MyTestPdfDocument()) { //Save the document using (MemoryStream pdfStream = new MemoryStream()) { d

我正在使用詹姆斯·蒙特马诺(James Montemagno)的本教程,介绍如何在使用IEmailService时附加文档。如何将Syncfusion PDF文档作为电子邮件附件附加

using (MyTestPdfDocument document = new MyTestPdfDocument())
{
    //Save the document
    using (MemoryStream pdfStream = new MemoryStream())
    {
        document.Save(pdfStream);
        FormattableString formattedEmail = $"\n-ExWU version-\nExpress WriteUp";

        try
        {
            var message = new EmailMessage
            {
                Subject = "Hello",
                Body = "World",
            };

            //var fn = "Attachment.pdf";
            var file = Path.Combine(FileSystem.CacheDirectory, document);//Close the document

            message.Attachments.Add(new EmailAttachment(file));

            await _emailService.ComposeAsync(message);

            }
            catch (FeatureNotSupportedException)
            {
                await PageDialogService.DisplayAlertAsync("", "Email is not supported on this device", "Ok");
            }
            catch (Exception ex)
            {

            }
        }
    }
}

我使用下面的DependencyService解决了我的问题<代码>电子邮件附件构造函数需要保存的文档的文件路径,而不是实际文档。在对James的代码做了一些修改之后,我能够为我的pdf创建一个文件路径,并创建一个依赖项服务来将我的pdf内容绘制到流中

try
{
    var message = new EmailMessage
    {
        Subject = "Hello",
        Body = "World",
    };

    var fn = "attachment.pdf";
    var filePath = Path.Combine(FileSystem.CacheDirectory, fn);
    string folderPath = DependencyService.Get<IDirectoryService>().SavePath(pdfStream, filePath);

    message.Attachments.Add(new EmailAttachment(folderPath));
    await _emailService.ComposeAsync(message);
}


catch (FeatureNotSupportedException)
{
    await PageDialogService.DisplayAlertAsync("", "Email is not supported on this device", "Ok");
}

catch (Exception ex)
{

}

我们可以使用Xamarin Essentials通过以下步骤将Syncfusion PDF文档作为电子邮件附件附加

  • 创建PDF文档并将其保存到文件夹中
  • 获取PDF文件的完整路径
  • 使用Xamarin Essentials将该PDF文档发送到电子邮件附件
我们已经创建了相同的示例,可以从下面的链接下载


免责声明:我不使用Syncfusion或Xamarin。在我看来,您可能需要a)将生成的PDF保存到文件中,然后附加到该文件,或者b)(假设EmailAttachment和Syncfusion支持此功能)将生成的PDF写入
MemoryStream
并从中创建附件。
public class DirectoryService : IDirectoryService
{
    public string SavePath(Stream inputStream, string fileName)
    {
        //Create a new file with the input file name in the Library folder
        var m_filepath = fileName;

        //Write the contents of the pdf to the newly created file
        using (MemoryStream tempStream = new MemoryStream())
        {
            inputStream.Position = 0;
            inputStream.CopyTo(tempStream);
            File.WriteAllBytes(m_filepath, tempStream.ToArray());
        }
        return m_filepath;
    }
}