private void DownloadTiles(object args)
{
var downloadFinished = args as ManualResetEvent;
// Loop through the tiles, and filter tiles that are already on disk.
var downloadTiles = new List<TileInfo>();
for (var i = 0; i < _tiles.Count(); i++)
{
if (!_fileCache.Exists(_tiles[i].Index))
{
downloadTiles.Add(_tiles[i]);
}
else
{
// Read tiles from disk
var name = _fileCache.GetFileName(_tiles[i].Index);
// Determine age of tile...
var fi = new FileInfo(name);
if ((DateTime.Now - fi.LastWriteTime).Days <= _tileTimeOut) continue;
File.Delete(name);
downloadTiles.Add(_tiles[i]);
}
}
if (downloadTiles.Count > 0)
{
int count = 1;
int allCount = 100;
while ((count - 1) * allCount < downloadTiles.Count)
{
try
{
int temp = allCount;
if (count*allCount > downloadTiles.Count)
temp = downloadTiles.Count - (count - 1)*allCount;
var doneEvents = new MultipleThreadResetEvent(temp);
ThreadPool.SetMaxThreads(25, 25);
for (int i = 0; i < temp; i++)
{
TileInfo t = downloadTiles[(count - 1)*allCount + i];
object o = new object[] {t, doneEvents};
ThreadPool.QueueUserWorkItem(DownloadTile, o);
}
doneEvents.WaitAll();
doneEvents.Dispose();
//Thread.Sleep(10);
count++;
}
catch (Exception ex)
{
MessageBox.Show("下载异常:" + ex.Message);
}
}
}
if (downloadFinished != null) downloadFinished.Set();
}
private void DownloadTiles()
{
var downloadTiles = new List<TileInfo>();
for (var i = 0; i < _tiles.Count(); i++)
{
if (!fileCache.Exists(_tiles[i].Index))
{
downloadTiles.Add(_tiles[i]);
}
}
if (downloadTiles.Count == 0)
{
MessageBox.Show("已经存在缓存文件，不需要缓存");
return;
}
var diare = MessageBox.Show("一共需要下载" + downloadTiles.Count + "张切片,是否继续？", "下载地图", MessageBoxButtons.OKCancel);
if (diare == DialogResult.Cancel)
return;
progressBar1.Minimum = 0;
progressBar1.Maximum = downloadTiles.Count;
progressBar1.Value = 0;
progressBar1.Step = 50;
if (downloadTiles.Count > 0)
{
int count = 1;
int allCount = 50;
ThreadPool.SetMaxThreads(100, 100);
while ((count - 1)*allCount < downloadTiles.Count)
{
try
{
int temp = allCount;
if (count*allCount > downloadTiles.Count)
temp = downloadTiles.Count - (count - 1)*allCount;
var doneEvents = new MultipleThreadResetEvent(temp);
for (int i = 0; i < temp; i++)
{
TileInfo t = downloadTiles[(count - 1)*allCount + i];
object o = new object[] {t, doneEvents};
ThreadPool.QueueUserWorkItem(DownloadTile, o);
}
int wt;
int ct;
ThreadPool.GetAvailableThreads(out wt, out ct);
if (wt < 15)
{
Thread.Sleep(5000);
continue;
}
doneEvents.WaitAll();
doneEvents.Dispose();
//Thread.Sleep(10);
progressBar1.PerformStep();
label4.Text = (allCount*count).ToString() + "/" + downloadTiles.Count;
Application.DoEvents();
count++;
}
catch (Exception ex)
{
MessageBox.Show("下载异常:" + ex.Message);
}
}
MessageBox.Show("下载完毕！");
}
}
