C#方法 下载网络图片

/// <summary>
/// 下载网络图片
/// </summary>
/// <param name="PicSourceUrl">图片的网络地址</param>
/// <param name="filePath">图片保存在本地的路径（需要加上图片的保存名称 如：D:\Images\1.jpg）</param>
/// <returns></returns>
public static bool DownPic(string PicSourceUrl,string filePath)
{
WebRequest request = WebRequest.Create(PicSourceUrl);
WebResponse response = request.GetResponse();
Stream reader = response.GetResponseStream();
FileStream writer = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.Write);
try
{
byte[] buff = new byte[512];
int c = 0; //实际读取的字节数
while ((c = reader.Read(buff, 0, buff.Length)) > 0)
{
writer.Write(buff, 0, c);
}
writer.Close();
writer.Dispose();
reader.Close();
reader.Dispose();
response.Close();
}
catch (Exception ex)
{
return false;
}
finally
{
if (writer!=null)
{
writer.Close();
writer.Dispose();
}
if (reader != null)
{
reader.Close();
reader.Dispose();
}
if (response != null)
{
response.Close();
}
}
return true;
}