在弹出窗口中显示图像 [英] showing image in pop up

问题描述

我有一个字节变量

I have a byte variable

Public img As Byte() = Nothing

我正在从sql server数据库中获取图像(二进制数据)

我以这种方式从javascript
通过querystring传递它

and i am taking image (binary data) in this from sql server database

I am passing it through querystring in this way from javascript

var img = ''<%= img %>'';
window.showModalDialog("cli_image.aspx?Client_img=" + img + " ", '''', WinSettings);

并以这种方式重新绑起来

and retieving it in this way

Dim bt As Byte()=New System.Text.ASCIIEncoding().GetBytes(Context.Request.QueryString("Client_img"))
Response.BinaryWrite(bt)

但它只显示system.byte []它应显示image

but it is showing onle system.byte[] it should show image

推荐答案

示例:
int width，height;//设置一些宽度高度
DataRow dr;////假设您在dr.
中有来自db的数据 System.Drawing.Image img =(System.Drawing.Image)imgConverter.ConvertFrom(((Byte [])dr ["img_person"]);
位图bmp =新位图(img，新大小(宽度，高度));
Response.ContentType ="image/GIF";//gif或其他格式
bmp.Save(Response.OutputStream，ImageFormat.Gif);//gif或其他格式

在弹出窗口的page_load事件中执行此操作.请记住，这是响应内容.因此，您将只有一幅图像的整个页面.如果您要在页面中显示多张图像，则无法按原样工作.您可能需要做比较.方式.

example:
int width, height;//set some widht & height
DataRow dr;//assume you have data from db in dr.
System.Drawing.Image img = (System.Drawing.Image)imgConverter.ConvertFrom((Byte[])dr["img_person"]);
Bitmap bmp = new Bitmap(img, new Size(width, height));
Response.ContentType = "image/GIF";//gif or other format
bmp.Save(Response.OutputStream, ImageFormat.Gif);//gif or other format

do this in popup''s page_load event. Remember this is Response content. So you will have whole page with just one image. If you would like to display multiple images in a page this does not work as is. You may have to do diff. way.

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