private void btnUploadToImageShack_Click(object sender, EventArgs e)
{
IImageShackUploader uploader = new StandardImageShackUploader();
ClearLastUploadedImageDisplayDetails();
if (chkResize.Checked == true)
{
int resizeWidth;
bool validResizeWidth = int.TryParse(txtImageWidth.Text, out resizeWidth);
int resizeHeight;
bool validResizeHeight = int.TryParse(txtImageHeight.Text, out resizeHeight);
if (!validResizeHeight || !validResizeWidth)
{
txtInfo.Text = "Invalid resize width or height entered";
}
else
{
txtInfo.Text = "Uploading Image...";
// uploading image can take some time, so assign it to a BackgroundWorker to prevent the
// main UI thread being frozen up.
BackgroundWorker bw = new BackgroundWorker();
bw.DoWork += delegate(object sender2, DoWorkEventArgs e2)
{
_lastImageUploadDetails = uploader.UploadImage(txtFilePath.Text, resizeWidth, resizeHeight);
};
bw.RunWorkerAsync();
// when the background worker is finished, run this anonymous method which either updates
// the details of the last uploaded image or displays an appropriate error message
// if there were problems.
bw.RunWorkerCompleted += delegate(object sender3, RunWorkerCompletedEventArgs e3)
{
try
{
if (e3.Error != null)
{
throw e3.Error;
}
UpdateLastUploadedImageDisplayDetails(_lastImageUploadDetails); txtInfo.Text = "Image Uploaded.";
}
catch (FileNotFoundException exp)
{
txtInfo.Text = exp.Message;
}
catch (XmlException exp)
{
txtInfo.Text = exp.Message;
}
};
}
}
else
{
txtInfo.Text = "Uploading Image...";
BackgroundWorker bw = new BackgroundWorker();
// same deal as the code above like this, except this time we're not resizing the image.
bw.DoWork +=
delegate(object sender2, DoWorkEventArgs e2)
{
_lastImageUploadDetails = uploader.UploadImage(txtFilePath.Text);
};
bw.RunWorkerAsync();
bw.RunWorkerCompleted += delegate(object sender3, RunWorkerCompletedEventArgs e3)
{
try
{
if (e3.Error != null)
{
throw e3.Error;
}
UpdateLastUploadedImageDisplayDetails(_lastImageUploadDetails); txtInfo.Text = "Image Uploaded.";
}
catch (FileNotFoundException exp)
{
txtInfo.Text = exp.Message;
}
catch (XmlException exp)
{
txtInfo.Text = exp.Message;
}
};
}
}
private void UpdateLastUploadedImageDisplayDetails(UploadedImageDetails details)
{
txtImageLink.Text = details.ImageLink;
txtThumbLink.Text = details.ThumbLink;
txtAdLink.Text = details.AdLink;
txtThumbExists.Text = details.ThumbExists.ToString();
txtTotalRaters.Text = details.TotalRaters.ToString();
txtAverageRating.Text = details.AverageRating.ToString();
txtImageLocation.Text = details.ImageLocation;
txtThumbLocation.Text = details.ThumbLocation;
txtServer.Text = details.Server;
txtImageName.Text = details.ImageName;
txtDonePage.Text = details.DonePage;
txtResolution.Text = details.Resolution;
txtFileSize.Text = details.FileSize.ToString();
txtImageClass.Text = details.ImageClass;
}
public ClientForm()
{
InitializeComponent();
_lastImageUploadDetails = new UploadedImageDetails();
chkResize.Checked = false;
}
/// <summary>
/// Extracts the details about the now uploaded image from the Xml that ImageShack returns.
/// </summary>
/// <param name="stream">The sequence of bytes containing the Xml response data.</param>
/// <returns>The details about the image that has been uploaded.</returns>
/// <exception cref="System.Xml.XmlException">Thrown when there is trouble interpreting ImageShack's response as
/// Xml</exception>
private UploadedImageDetails ExtractImageDetails(Stream stream)
{
UploadedImageDetails details = new UploadedImageDetails();
try
{
XmlReader rdr = XmlReader.Create(stream);
while (rdr.Read())
{
if (rdr.NodeType == XmlNodeType.Element)
{
switch (rdr.Name)
{
case "image_link":
details.ImageLink = rdr.ReadString();
break;
case "thumb_link":
details.ThumbLink = rdr.ReadString();
break;
case "ad_link":
details.AdLink = rdr.ReadString();
break;
case "thumb_exists":
string thumbExists = rdr.ReadString();
if (thumbExists == "no")
{ details.ThumbExists = false; }
else if (thumbExists == "yes")
{ details.ThumbExists = true; }
else
{ throw new InvalidOperationException(); }
break;
case "total_raters":
details.TotalRaters = rdr.ReadElementContentAsInt();
break;
case "ave_rating":
details.AverageRating = rdr.ReadElementContentAsDouble();
break;
case "image_location":
details.ImageLocation = rdr.ReadString();
break;
case "thumb_location":
details.ThumbLocation = rdr.ReadString();
break;
case "server":
details.Server = rdr.ReadString();
break;
case "image_name":
details.ImageName = rdr.ReadString();
break;
case "done_page":
details.DonePage = rdr.ReadString();
break;
case "resolution":
details.Resolution = rdr.ReadString();
break;
case "filesize":
details.FileSize = rdr.ReadElementContentAsInt();
break;
case "image_class":
details.ImageClass = rdr.ReadString();
break;
default:
break;
}
}
}
}
catch (XmlException e)
{
throw e;
}
return details;
}
