private async void extractButton_Click(object sender, EventArgs e)
{
//Checks that ensures that a valid input was made
if (textBox1.Text == string.Empty || textBox1.Text == " ")
{
MessageBox.Show("Textbox cannot be empty.", "Warning",
MessageBoxButtons.OK, MessageBoxIcon.Warning);
textBox1.Text = string.Empty;
return;
}
if (!Uri.IsWellFormedUriString(textBox1.Text, UriKind.Absolute))
{
MessageBox.Show("URL is not in correct format", "Warning",
MessageBoxButtons.OK, MessageBoxIcon.Warning);
textBox1.Text = string.Empty;
return;
}
imageList.Clear();
listBox1.Items.Clear();
fileExtension = null;
url = textBox1.Text;
label1.Text = "Extracting data.";
//Async calling methods
CallingMethodsAsync caller = new CallingMethodsAsync();
try
{
imageList = await caller.DownloadAsync(textBox1.Text);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Warning",
MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
foreach (var imageLink in imageList)
{
listBox1.Items.Add(imageLink);
}
if (imageList.Count == 0)
{
MessageBox.Show("No images found", "Results",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
label1.Text = string.Format("Found {0} images.", imageList.Count);
}
private async Task SaveAllImages(List <string> imageList)
{
//Have user set folderBrowserDialog1.SelectedPath property
folderBrowserDialog1.SelectedPath = string.Empty;
folderBrowserDialog1.ShowDialog();
string path = folderBrowserDialog1.SelectedPath;
if (path == string.Empty)
{
return;
}
FormatListItems(imageList);
CallingMethodsAsync caller = new CallingMethodsAsync();
ImageValidationMethods validator = new ImageValidationMethods();
for (int i = 0; i < imageList.Count; i++)
{
try
{
byteList.Add(await caller.DownloadImageAsync(imageList[i]));
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Warning",
MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
label1.Text = string.Format("Downloaded {0} of {1} images.", byteList.Count, imageList.Count);
}
int counter = 0;
for (int i = 0; i < byteList.Count; i++)
{
if (byteList[i].Length > 1)
{
if (validator.IsValidImageFormat(byteList[i]))
{
fileExtension = validator.ReturnImageExtension(byteList[i]);
try
{
await File.WriteAllBytesAsync(Path.Combine(path, "image" + i + fileExtension), byteList[i]);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Warning",
MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
else
{
counter++;
}
}
else
{
counter++;
}
}
if (counter != 0)
{
MessageBox.Show(counter == 1 ? $"{counter} image could not be saved" :
$"{counter} images could not be saved",
"Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
