从字符串中提取图片数据 [英] Extract Picture Data from a String

问题描述

亲爱的，

提前致谢.任何人都可以帮助解决以下问题.

我做了一个套接字应用程序，它从车辆跟踪unit.one 示例接收数据，如下所示:

Dears,

Thanks in advance. Can anybody help to solve my problem which is described below.

I did a socket application which is receiving data from a vehicle tracking unit.one example as follows:

Example- %%D1,100,0,0004[data...][0d0a]

Head -   %%D1
Amount of data package -100
The data package No.  - 0
Data Length -1024  (0004 (low bit in front, high bit in back) 0004= 0x0400=1024;)

data- Original Picture data -1024(maximum)
Tail -0x0d0a
Data in hex

从上面的示例中，我想提取图片数据并将其存储到SQL表中. SQL表columname 是映像，datatype 也是映像.之后，我想将此图像列显示到aspx页面.

尽快寻求帮助.

From the above example, I want to extract picture data and need to store into the SQL table. SQL table columname is image and datatype is also image. After that, I want to display this image column to an aspx page.

expecting help asap.

推荐答案

如果我没看错，则图像数据为十六进制格式，对吗?因此我们可以将数据放入字节数组中，然后将其保存到数据库中.

提取数据并将其保存到bytearray后，其余的操作将很容易.这是一个很好的例子:
在C#中将十六进制字符串与字节数组进行转换 [ http://msdn.microsoft.com/zh-我们/library/e55f3s5k.aspx [ ^ ].

然后将其存储在数据库中，请参见:
http://www.codersource.net/asp-net/ado-net/reading-and-writing-images-from-sql-server.aspx [

If I got that right, image data is in Hex format, right? So we can put the data in a bytearray, and then save it to database.

Once you extracted data and saved it to a bytearray, the rest will be easy. Here is a good example of how to do that:
Converting Hexadecimal String to/from Byte Array in C#[^].

You need to create a MemoryStream, see this: http://msdn.microsoft.com/en-us/library/e55f3s5k.aspx[^].

Then store it in database, see this:
http://www.codersource.net/asp-net/ado-net/reading-and-writing-images-from-sql-server.aspx[^].

--------------------

Regards

H.Maadani

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