GetImage

2019-11-14 13:39:06

字体：大中小

来源：转载

供稿：网友

check路径是是否有效，网络访问地址。notfound查找不到，httpstatuscode枚举数较多，根据自己想要的设置就好了。

public bool checkValid(string path)        {            HttpWebRequest request = HttpWebRequest.Create(path) as HttpWebRequest;            request.Method = "GET";            request.PRotocolVersion = new Version(1, 1);            HttpWebResponse response = request.GetResponse() as HttpWebResponse;            if (response.StatusCode==HttpStatusCode.NotFound)            {                return false;            }            return true;        }

根据网络地址还是本地路径，进行获取图片数据，保存到本地文件下。注意数据流的权限File access.ReadWrite

保存有可能出错，在外层套了个try catch，不过各个节进行判断更好，能够拿到出错点。

if (url.IndexOf("http://") == 0 || url.IndexOf("https://") == 0)                {                    WebRequest request = (WebRequest)HttpWebRequest.Create(url);                    WebResponse response = request.GetResponse();                    Stream stream = response.GetResponseStream();                    FileStream fileStream = File.Create(filePath);                    byte[] buffer = new byte[(int)response.ContentLength];                    int numReadByte = 0;                    while ((numReadByte = stream.Read(buffer, 0, (int)response.ContentLength)) != 0)                    {                        fileStream.Write(buffer, 0, numReadByte);                    }                    fileStream.Close();                    stream.Close();                }                else                {                    FileStream fs = File.Open(url, FileMode.Open, FileAccess.ReadWrite, FileShare.Read);                    FileStream fileStream = File.Create(filePath);                    Byte[] image = new Byte[(int)fs.Length];                    int numReadByte = 0;                    while ((numReadByte = fs.Read(image, 0, (int)fs.Length)) != 0)                    {                        fileStream.Write(image, 0, numReadByte);                    }                    fs.Close();                    fileStream.Close();                }

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