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;
}

转载于:https://www.cnblogs.com/xiaobuild/archive/2011/06/16/2082795.html