When I see this question, some people will say that it is not easy. Simply set the URL to an absolute path. I can only say that, if you say this, it only means that you have not thought about it or even figured out what the foreground code and background code mean in Web development, when you do it yourself (not mounted to IIS), The sogou browser can display images (only this one can be displayed, so this method does not make sense ).
The Image control is in the System. web. UI. in the WebControls naming control, the image cannot be directly displayed through byte [] as in winform (I am not quite familiar with this sentence, but can explain it if I understand it ). This method is used to read the Image, write the binary stream to a page, and set the Image URL to this page. The following is my Demo implementation code.
Front-end code:Copy codeThe Code is as follows: <Title> </title>
<Script src = "jquery-1.7.1.js" type = "text/javascript"> </script>
<Script type = "text/javascript">
Function ShowP (obj ){
$ ("# Image1") [0]. src = "ShowPic. aspx? URL = "+ obj. id;
}
</Script>
</Head>
<Body>
<Form id = "form1" runat = "server">
<Div>
<Input id = "E: \ 1.jpg" type =" button "value =" button "onclick =" ShowP (this); "/>
<Asp: Image ID = "Image1" runat = "server"/>
</Div>
</Form>
</Body>
</Html>
The front-end code of ShowPic. aspx is empty. The following is the background code of ShowPic. aspx:Copy codeThe Code is as follows: public partial class ShowPic: System. Web. UI. Page
{
Protected void Page_Load (object sender, EventArgs e)
{
# Region "convert a photo to a binary array based on the photo path"
String strUrl = Request. QueryString ["URL"];
// Read the file in binary mode
FileStream aFile = new FileStream (strUrl, FileMode. OpenOrCreate, FileAccess. ReadWrite );
// Create a binary data stream reader and associate it with the opened file
BinaryReader brMyfile = new BinaryReader (aFile );
// Relocates the file pointer to the beginning of the file
BrMyfile. BaseStream. Seek (0, SeekOrigin. Begin );
// Obtain the byte array of the photo
Byte [] photo = brMyfile. ReadBytes (Convert. ToInt32 (aFile. Length. ToString ()));
// Close all objects of the new object above
BrMyfile. Close ();
# Endregion
Response. BinaryWrite (photo );
}
}
In the above section, I assigned the photo path to the button ID, and then used the path as a parameter to call ShowPic. aspx: In the background code of ShowPic, the photos are written to the page as two-dimensional arrays. If you open this page directly, garbled characters are displayed.
Set the Image Url to this page, and the Image will be displayed. By using the button ID, I realized dynamic loading of images to specific applications. There is also a small question about passing parameters. For JavaScript parameter passing, you need to make your own example, you can use javascript debugging tools to understand the dom structure and then perform operations.
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