/// <summary>
/// 开始下载
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
//https://img10.360buyimg.com//img10.360buyimg.com/n5/jfs/t16648/127/676229886/381380/5cd0ff57/5a9f9803N5f6fb75e.jpg,https://img10.360buyimg.com//img10.360buyimg.com/n5/jfs/t11536/149/923156565/176376/5b1f83d3/59fb36cbN8bf5f999.jpg,https://img10.360buyimg.com//img10.360buyimg.com/n5/jfs/t4849/287/2366502398/51002/e4c78c7e/58fda42cN8257ef81.jpg,https://img10.360buyimg.com//img10.360buyimg.com/n5/jfs/t5224/163/352052465/49811/5e4b226d/58fda430N425183cb.jpg,https://img10.360buyimg.com//img10.360buyimg.com/n5/jfs/t5224/174/350178704/61947/90178883/58fda433Nf158a71b.jpg,https://img10.360buyimg.com//img10.360buyimg.com/n5/jfs/t4417/170/3446005181/67590/d683b206/58fda435Naba3ac26.jpg,https://img10.360buyimg.com//img20.360buyimg.com/vc/jfs/t1/2745/1/4354/231848/5b9b93c3Ed674c3cc/07c8b03154c71c47.jpg,https://img10.360buyimg.com//img20.360buyimg.com/vc/jfs/t10786/236/1312431261/94610/f6ab7662/59df2ce1N95f655ea.jpg,https://img10.360buyimg.com//img20.360buyimg.com/vc/jfs/t9541/280/1317436849/102051/668300b5/59df2cf9Nb08435bb.jpg,https://img10.360buyimg.com//img20.360buyimg.com/vc/jfs/t9616/319/1333136873/65831/1c2e16f3/59df2ceeNb1ddc7eb.jpg,https://img10.360buyimg.com//img20.360buyimg.com/vc/jfs/t9511/286/1314865248/57885/8c850701/59df2d06Ne4738e2b.jpg,https://img10.360buyimg.com//img20.360buyimg.com/vc/jfs/t10351/357/1323797830/81592/5106a6c4/59df2d0fN4a518ee4.jpg,https://img10.360buyimg.com//img20.360buyimg.com/vc/jfs/t10792/298/1311076768/100638/2702f731/59df2d11Nb95bb14e.jpg
#region 检查页面数据
if (string.IsNullOrEmpty(this.textImg.Text) || string.IsNullOrEmpty(this.ImageTypes))
{
MessageBox.Show("请填写图片地址！");
return;
}
this.DownLoadImage = new DownloadImage()
{
DownLoadImageUrl = this.textImg.Text,
FileBigImageFilePath = this.textBigImg.Text,
FileDetailImageFilePath = this.textDetailImg.Text,
RegexImageUrl = new Regex(string.Format(@"^http(s*)://.+\.({0})\?(big|detail)$", this.ImageTypes))
};
this.CheckDirectory(this.DownLoadImage.FileBigImageFilePath);
this.CheckDirectory(this.DownLoadImage.FileDetailImageFilePath);
#endregion
//1-开始下载图片
this.button1.Enabled = false;
this.DownLoadImage.BeginDownLoadImage(this.DownLoadImage, this.updateLoadingStr);
//2-下载结束
this.button1.Text = "下 载";
this.button1.Enabled = true;
MessageBox.Show("下载完成！");
}
/// <summary>
/// 开始下载图片
/// </summary>
/// <param name="updateLoadingState">下载过程中：更新面板状态方法</param>
/// <returns></returns>
public bool BeginDownLoadImage(DownloadImage downLoadImage, Action updateLoadingState)
{
bool downLoadResult = false;
string[] imgArray = this.DownLoadImageUrl.Split(',');
this.ImageTotalCount = imgArray.Length;
updateLoadingState();
string imgYC = "";
foreach (var img in imgArray)
{
imgYC = img;
downLoadImage.DownLoadFile(downLoadImage, imgYC);
updateLoadingState();
}
return(downLoadResult);
}
/// <summary>
/// 下载网络图片到本地目录
/// </summary>
/// <param name="webFileUrl">网络图片地址</param>
private void DownLoadFile(DownloadImage downLoadImage, string webFileUrl)
{
bool downLoadResult = true;
bool isBigImage = true;
//A-检查网络图片地址有效性
if (downLoadImage.CheckImageUrl(webFileUrl) == false)
{
downLoadImage.ImageErrorCount++;
downLoadImage.ImageErrorUrlList.Add(webFileUrl);
}
else
{
//B-检查大图详情图标记有效性
string saveFilePath = "";
string fileName = "";
if (webFileUrl.IndexOf("?big") > -1)
{
webFileUrl = webFileUrl.Replace("?big", "");
fileName = "大图_" + (downLoadImage.BigImageDownLoadCount + 1) + "_" + webFileUrl.Split('/').Last();
saveFilePath = downLoadImage.FileBigImageFilePath + fileName;
}
else
{
isBigImage = false;
webFileUrl = webFileUrl.Replace("?detail", "");
fileName = "详情图_" + (downLoadImage.DetailImageDownLoadCount + 1) + "_" + webFileUrl.Split('/').Last();
saveFilePath = downLoadImage.FileDetailImageFilePath + fileName;
}
#region 方法一：使用请求数据流下载文件
//方法一：使用请求数据流下载文件
WebRequest request = WebRequest.Create(webFileUrl);
WebResponse response = null;
try
{
response = request.GetResponse();
}
catch (Exception e)
{
//远程文件不存在
downLoadResult = false;
downLoadImage.ImageErrorCount++;
downLoadImage.ImageErrorUrlList.Add(webFileUrl);
}
if (downLoadResult && response != null)
{
//下载成功
//获取远程读取字节流
Stream readStream = response.GetResponseStream();
//一次实际读取到的字节数
int readByteLength = 0;
byte[] readByteArray = new byte[Form1.MAX_READ_BYTE_LENGTH];
FileStream writer = new FileStream(saveFilePath, FileMode.OpenOrCreate, FileAccess.Write);
//一次预读取100KB字节，放入字节数组中，再将实际读取的字节流写入待写入流文件中
while ((readByteLength = readStream.Read(readByteArray, 0, Form1.MAX_READ_BYTE_LENGTH)) > 0)
{
writer.Write(readByteArray, 0, readByteLength);
}
//释放写入流资源资源
writer.Close();
writer.Dispose();
//释放读取流资源
readStream.Close();
readStream.Dispose();
response.Close();
response.Dispose();
if (isBigImage)
{
downLoadImage.BigImageDownLoadCount++;
downLoadImage.BigImageDownLoadUrlList.Add(webFileUrl);
}
else
{
downLoadImage.DetailImageDownLoadCount++;
downLoadImage.DetailImageDownLoadUrlList.Add(webFileUrl);
}
}
#endregion
#region 方法二：使用WebClient下载图片
//方法二：使用WebClient下载图片
//try
//{
// Form1.WebClient.DownloadFile(webFileUrl, saveFilePath);
// //下载成功
// if (isBigImage)
// {
// downLoadImage.BigImageDownLoadCount++;
// downLoadImage.BigImageDownLoadUrlList.Add(webFileUrl);
// }
// else
// {
// downLoadImage.DetailImageDownLoadCount++;
// downLoadImage.DetailImageDownLoadUrlList.Add(webFileUrl);
// }
//}
//catch (Exception)
//{
// //远程文件不存在
// downLoadResult = false;
// downLoadImage.ImageErrorCount++;
// downLoadImage.ImageErrorUrlList.Add(webFileUrl);
//}
#endregion
}
}
