C#之通過圖片地址下載圖片

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因為項目上需要載入線上衛星雲圖，因此寫了這個功能來把衛星雲圖下載的本地,在這裡記錄一下：

string imageUrl=“http://image.nmc.cn/product/2018/08/06/WXCL/SEVP_NSMC_WXCL_ASC_E99_ACHN_LNO_PY_20180806051500000.JPG?v=1533532726321”;

string _ImagePath = AppDomain.CurrentDomain.BaseDirectory + "Resources\\CloudImages\\"+“test.JPG”;

上面為圖片地址和本地檔案夾的設定。

接下來是圖片下載相關代碼：

                        HttpWebRequest request = HttpWebRequest.Create(imageUrl) as HttpWebRequest;                        HttpWebResponse response = null;                        response = request.GetResponse() as HttpWebResponse;if (response.StatusCode != HttpStatusCode.OK) continue;                        Stream reader = response.GetResponseStream();                        FileStream writer = new FileStream(_ImagePath, FileMode.OpenOrCreate, FileAccess.Write);                        byte[] buff = new byte[512];                        int c = 0; //實際讀取的位元組數                        while ((c = reader.Read(buff, 0, buff.Length)) > 0)                        {                            writer.Write(buff, 0, c);                        }                        writer.Close();                        writer.Dispose();                        reader.Close();                        reader.Dispose();                        response.Close();

 

C#之通過圖片地址下載圖片