把网络数据流转换成图片类


 1 public void GetImageSize(string FullFileName, int intPrintImageHeight, int intPrintImageWidth, ref int intmageHeight, ref int intImageWidth)
 2 {
 3     //Dim oImage As Image = Nothing
 4     //oImage = Image.FromFile(FullFileName.Replace("/", "\").Replace("http:\\", ""))
 5 
 6     //Dim bytes As Byte() = New System.Net.WebClient().DownloadData("")
 7  
 8     WebRequest webRequest__1 = WebRequest.Create(FullFileName);
 9     WebResponse webResponse = webRequest__1.GetResponse();
10     Bitmap oImage = new Bitmap(webResponse.GetResponseStream());
11     //intImageWidth = myImage.Width
12     //intmageHeight = myImage.Height
13 
14     try {
15         if (oImage.Width > intPrintImageWidth && oImage.Height > intPrintImageHeight) {
16             if ((intPrintImageWidth / oImage.Width) < (intPrintImageHeight / oImage.Height)) {
17                 intImageWidth = intPrintImageWidth;
18                 intmageHeight = Conversion.Int(oImage.Height * intPrintImageWidth / oImage.Width);
19             } else {
20                 intImageWidth = Conversion.Int(oImage.Width * intPrintImageHeight / oImage.Height);
21                 intmageHeight = intPrintImageHeight;
22             }
23         } else if (oImage.Width > intPrintImageWidth) {
24             intImageWidth = intPrintImageWidth;
25             intmageHeight = Conversion.Int(oImage.Height * intPrintImageWidth / oImage.Width);
26 
27         } else if (oImage.Height > intPrintImageHeight) {
28             intImageWidth = Conversion.Int(oImage.Width * intPrintImageHeight / oImage.Height);
29             intmageHeight = intPrintImageHeight;
30         } else {
31             intImageWidth = oImage.Width;
32             intmageHeight = oImage.Height;
33         }
34 
35     } catch (Exception ex) {
36         throw (ex);
37     } finally {
38         if (oImage != null) {
39             oImage.Dispose();
40             oImage = null;
41         }
42     }
43 
44 
45 }

验证是否图片存在

public int GetUrlExistError(string url)
{
    int num = 0;
    if (url.Length > 1) {
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(url));
        ServicePointManager.Expect100Continue = false;
        try {
            ((HttpWebResponse)request.GetResponse()).Close();
        } catch (WebException exception) {
            if (exception.Status != WebExceptionStatus.ProtocolError) {
                return num;
            }
            if (exception.Message.IndexOf("500 ") > 0) {
                return 500;
            }
            if (exception.Message.IndexOf("401 ") > 0) {
                return 401;
            }
            if (exception.Message.IndexOf("404") > 0) {
                return 404;
            }
        }
        num = 1;
    }
    return num;
}