/// <summary>
/// 渡されたアドレスリストを元に画像のダウンロードを開始する
/// </summary>
/// <param name="imageAdresses">ダウンロード対象画像アドレス</param>
/// <param name="folder">ダウンロード先ディレクトリ</param>
public void StartDownload(string imageAdresse, string folder)
{
if (folder.EndsWith(@"\") == false)
{
folder = folder + @"\";
}
WebClient wc = new WebClient();
string downloadingfileName = imageAdresse;
//禁則文字の置換
foreach (var InvalidPathChar in Path.GetInvalidPathChars())
{
if (imageAdresse.Contains(InvalidPathChar.ToString()))
{
downloadingfileName = downloadingfileName.Replace(InvalidPathChar, '_');
}
}
downloadingfileName = Path.GetFileName(downloadingfileName);
//禁則文字の置換
foreach (var InvalidPathString in invalidPathStrings)
{
if (imageAdresse.Contains(InvalidPathString))
{
downloadingfileName = downloadingfileName.Replace(InvalidPathString, "_");
}
}
string fileName = folder + downloadingfileName;
int count = 1;
//保存名が既に存在する場合、末尾にナンバリングを行い重複しないようにする
while (System.IO.File.Exists(fileName))
{
string extension = Path.GetExtension(fileName);
fileName = fileName.Remove(fileName.Length - extension.Length, extension.Length);
if (count != 1)
{
fileName = fileName.Remove(fileName.Length - count.ToString().Length, count.ToString().Length);
}
fileName = fileName + count.ToString() + extension;
count++;
}
wc.DownloadFile(new Uri(imageAdresse), fileName);
}
/// <summary>
/// Replaces invalid Characters (Not acceptable by Windows while renaming a file or Path) with '_' underscore.
/// </summary>
/// <param name="fileName">File Name</param>
/// <returns>Returns Valid Windows File Name.</returns>
public static string GetValidFileName(string fileName)
{
string ReturnValue = fileName;
foreach (char InvalidFileNameChar in Path.GetInvalidFileNameChars())
{
ReturnValue = ReturnValue.Replace(InvalidFileNameChar, '_');
}
foreach (char InvalidPathChar in Path.GetInvalidPathChars())
{
ReturnValue = ReturnValue.Replace(InvalidPathChar.ToString(), string.Empty);
}
return(ReturnValue);
}
