I have a project on M.V.C 4 C# internet application and i have followed some guides to save Google visualization column chart to an image to my drive with ajax function.Also i am making a P.D.F format report with razor P.D.F nugget package.The path is: "C\temp\" and both files are there.I need to attach both files to an email and send them and then to delete the created files.
I call the send email function with ajax :
$('#btnSend').on('click', function () {
if (from) {
fromDate = from.toJSON();
}
if (to) {
toDate = to.toJSON();
}
// from and to are dates taken from two datepickers
// saves the pdf to the server
if (from && to) {
$.ajax({
url: "/Home/SavePdf/",
data: { fromDate: fromDate, toDate: toDate },
type: 'GET',
async: false,
datatype: 'json',
success: function (data) {
alert('got here with data');
},
error: function () { alert('something bad happened'); }
});
}
// saves the column chart to the server from canvas item with id reports
var imgData = getImgData(document.getElementById("reports"));
var imageData = imgData.replace('data:image/png;base64,', '');
$.ajax({
url: "/Home/SaveImage/",
type: 'POST',
data: '{ "imageData" : "' + imageData + '" }',
datatype: 'json',
async: false,
contentType: 'application/json; charset=utf-8',
success: function () {
alert('Image saved successfully !');
},
error: function () {
alert('something bad happened');
}
});
$.ajax({
type: "POST",
url: "/Home/SendMail/",
async: false,
success: function() {
alert('Message sent successfully');
}
});
});
and here is my function in the code behind
public void SendMail()
{
var path = @"C:\temp\";
string pngFilePath = path + DateTime.Now.ToShortDateString() + ".png";
string pdfFilePath = path + DateTime.Now.ToShortDateString() + ".pdf";
MailMessage message = new MailMessage("message sender", "message reciever")
{
Subject = "Test",
Body = @"Test"
};
Attachment data = new Attachment(pdfFilePath ,
MediaTypeNames.Application.Pdf);
message.Attachments.Add(data);
Attachment data2 = new Attachment(pngFilePath , GetMimeType(pngFilePath);
// GetMimeType function gets the mimeType of the unknown attachment
message.Attachments.Add(data2);
SmtpClient client = new SmtpClient();
client.Host = "smtp.googlemail.com";
client.Port = 587;
client.UseDefaultCredentials = true;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.EnableSsl = true;
client.Credentials = new NetworkCredential("mail sender", "sender password");
client.Send(message);
// delete the png after message is sent
if ((System.IO.File.GetAttributes(pngFilePath ) & FileAttributes.Hidden) == FileAttributes.ReadOnly)
{
System.IO.File.SetAttributes(pngFilePath , FileAttributes.Normal);
if (System.IO.File.Exists(pngFilePath ))
{
System.IO.File.Delete(pngFilePath );
}
}
// delete the pdf after message is sent
if ((System.IO.File.GetAttributes(pdfFilePath ) & FileAttributes.Hidden) == FileAttributes.ReadOnly)
{
System.IO.File.SetAttributes(pdfFilePath , FileAttributes.Normal);
if (System.IO.File.Exists(pdfFilePath ))
{
System.IO.File.Delete(pdfFilePath );
}
}
}
I want to delete those files, but IIS continues to use them and delete operation is never reached. Is there any way to disattach those files from iis and delete them ?
It's SmtpClient
that locks the files. Create a stream for each file and use that as an attachment.
Something like this:
using(Stream fs1 = File.OpenRead(pdfFilePath))
using(Stream fs2 = File.OpenRead(pngFilePath))
{
Attachment data = new Attachment(fs1 , GetMimeType(pdfFilePath));
Attachment data2 = new Attachment(fs2 , GetMimeType(pngFilePath));
message.Attachments.Add(data);
message.Attachments.Add(data2);
...
client.Send(message);
}
EDIT: My initial suggestion, to use client.Dispose()
after sending the mail, doesn't seem to work