How does Solve Image display pictures in memory?

weiranli00

Brothers, in the .NET WEB program, how does the Image control display pictures in memory because the pictures are encrypted and decrypted in memory. Or there are other good solutions, thank you!

weiranli00

Where have all the masters gone?

5954979

Image's ImageUrl is connected to an a.aspx.
A.aspx's Page_Load uses Response.BinaryWrite (bys); where bys is the byte sequence of the image in memory.

It should be noted that you need to save the decrypted picture as a memory file and then take the bytes, that is, the bytes of the memory file are exactly the same as the bytes of the hard disk file we usually use.

By the way, what's the use of such encryption? The client is Base64, and it can be restored as a memory file after testing it out.

tianfeng

create a memory stream from byte [], and pass the stream to the image

shenmue024

byte [] bytes = null; //
// At this time, the code to get bytes
System.IO.MemoryStream ms = new System.IO.MemoryStream ();
ms.Write (bytes, 0, bytes.Length);
Bitmap bmp = new Bitmap (ms);
bmp.Save (Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);

weiranli00

I have tried all these methods, thanks!

weiranli00

But I want to display the picture on the Image control or ImageButton, not directly output to the webpage, because I also want to layout and display many small pictures, and then click on the small picture to zoom in.

shenmue024

But I want to display the picture on the Image control or ImageButton, not directly output to the webpage, because I also want to layout and display many small pictures, and then click on the small picture to zoom in.
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If you don't want to save it on the hard disk, make a separate page and display the picture

<img src = "showimg.aspx">

Write in showimg.aspx

byte [] bytes = null; //
// this time
Get bytes code
System.IO.MemoryStream ms = new System.IO.MemoryStream ();
ms.Write (bytes, 0, bytes.Length);
Bitmap bmp = new Bitmap (ms);
bmp.Save (Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);

weiranli00

I just do n’t want to save it on the hard disk. I do n’t know if there is any other way?

rrstsnk

Get bytes code
System.IO.MemoryStream ms = new System.IO.MemoryStream ();
ms.Write (bytes, 0, bytes.Length);
Bitmap bmp = new Bitmap (ms);
ImageButton.Image = bmp;