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我在 EDM（实体数据模型）.NET 服务调用中返回了一个 sql 图像类型字段。图像字段在 sql server 2008 中以二进制形式存储。但是，我不确定图像数据发生了什么，或者什么类型的编码。而且由于 Web 服务是在幕后生成的，所以在通过网络发送之前，我无法确定该服务是否对图像二进制数据做了一些奇怪的事情。

有人做过这种事吗？

我试过base64解码图像，尝试将NSURLConnection请求编码设置为NSUTF8StringEncoding，都没有运气

这是一个示例数据包嗅探：

HTTP/1.1 200 OK 日期：2010 年 3 月 9 日星期二 19:41:13 GMT 服务器：Microsoft-IIS/6.0 X-Powered-By：ASP.NET X-AspNet-Version：2.0.50727 DataServiceVersion：1.0；缓存控制：无缓存内容类型：应用程序/json；charset=utf-8 内容长度：41809

{ "d" : [ { "__metadata": { "uri": " http://11.111.11.111:8002/domain/myservice.svc/StudentByGroupID(createDate=datetime\'2009-12-15T11%3A16%3A18.14\',firstName=\'念松\',groupId=1,isActive=1,lastName=\'Liu\',studentGroupId=28,studentId=6)", “type”：“MyModel.StudentByGroupID”}，“studentId”：6，“firstName”：“Niansong”，“lastName”：“Liu”，“createDate”：“/Date(1260875778140)/”，“updateDate”：空，“isActive”：1，“图像”：“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 +2faQf9jH+FaUcGjbFHmaiNowBsBArKpbZo1p36M2JPFGuvw+qXOD285h/Kqr61qT58zUp29mmc/wBaKKzUUza9iJLq4nkWNJ9zyMFUHPJPA6n3rvtSkF7dRfahm3iiMsUI6Y/vn3Y9B2HXnoUU+RRWh04eTle5xUpe4vbd52+d2LRgdEABOfxI/KhFkhXI+bcOSD3/AP1Giiuql8JyV9ZsJtqxY2HeWJJfnnOeBkgdaz7hFMucZ5+X8/8A9VFFaNHOUpQqx7CD6n8qrMpMg55yQAfWiioJOg8JsXtg8OBcQyMy56OuRkH8/wBa3NRkWZEZOFkJ3KR/n1oorm+0etR/hI4DpgUoIoorY8ok2hsAitzQRGtpGZEBHIL7FJyMjv1oorCt8BtR+I//2Qs=", "studentGroupId": 28, "groupId": 1 } ] }

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2 回答 2

1

该返回是一个JSON有效负载 (application/json)，在 UTF-8 字符集上带有 base64 编码图像。如果您不想自己解析 JSON，可以尝试使用json-framework或TouchJSON。

于 2010-03-10T17:34:19.160 回答
0

这是.net图像相关代码：

Codes for saving images into database
System.Drawing.Image img = System.Drawing.Image.FromFile(imgPath);// “imgPath” is the file path of a temporary image uploaded by a user.
student.image = new System.Data.Linq.Binary(Utility.Convertor.ImageToByteArray(img));
img.Dispose();
Codes for writing image bytes from server to client
System.Drawing.Image img = Utility.Convertor.ByteArrayToImage(stu.image.ToArray());
Response.ContentType = ("image/" + Utility.Gadget.GetImageFormat(img));
MemoryStream ms = new MemoryStream();
img.Save(ms, img.RawFormat);
byte[] result = ms.ToArray();
ms.Close();
ms.Dispose();
Response.BinaryWrite(result);

Below are encapsulated methods for storing / restoring students’ images:
Serializer for serializing a image to bytes
/// 
/// Convert a System.Drawing.Image object to byte array formatted by System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.
/// 
/// 
/// 
public static byte[] ImageToByteArray(System.Drawing.Image imageIn)
{
      BinaryFormatter sf = new BinaryFormatter();
      MemoryStream ms = new MemoryStream();
      sf.Serialize(ms, imageIn);
      byte[] result = ms.ToArray();
      ms.Close();
      ms.Dispose();
      return result;
}
Deserializer for restoring a image from bytes
/// 
/// Convert a byte array formatted by System.Runtime.Serialization.Formatters.Binary.BinaryFormatter to a System.Drawing.Image object.
/// 
/// 
/// 
public static System.Drawing.Image ByteArrayToImage(byte[] byteArrayIn)
{
       BinaryFormatter sf = new BinaryFormatter();
       MemoryStream ms = new MemoryStream(byteArrayIn);
       System.Drawing.Image returnImage = (System.Drawing.Image)sf.Deserialize(ms);
       ms.Close();
       ms.Dispose();
       return returnImage;
}
于 2010-03-11T19:48:57.133 回答