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Old December 5th, 2006, 10:22 AM
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Default how inserting more bitmap graphics in a page?


I made a webform for a survey, with multiple-choice questions. The results of each question are put into tables, one table per question, like:
values frequency
1 6
2 3
3 32
4 26
5 12

Now i want to add a graphic using the Namespace "System.Drawing" beside the table representing those values. So i
use two files, the second containing the code for the graphic.
I tried two ways: with a cookie (i know, not the best way) and with requeststring. Everything works, except that the second file has no time to create and render the graphic.
This happens in a loop: the first table is made, then the cookie or requeststring is sent together with the reference to file 2 where the graphic is created, then next table etc ...

My problem:
When using a cookie, each graphic appears beside its table in file 1 but all with the values of the last table (the value of the last send cookie).
When using a parameter, only the graphic of the last question is rendered (with the right values).

I thing it's a matter of speed: file 2 has no enough time to produce and send the graphic to file 1.
Any way to solve this?


My code:

file1: (with parameter)
'valtopass is the string containing the values to pass with ':' as separator
(e.g. 6:3:32:26:12)
 For j = 1 To numberoffield
'create table
 gr.ImageUrl = "graf2.aspx?v1=" & valtopass

file1: (with cookie)
'valtopass is the string containing the values to pass with ':' as separator
(e.g. 6:3:32:26:12)
'cok = HttpCookie
 For j = 1 To numberoffield
'create table

file2 (graphic)
Dim objBitmap As New Bitmap(40 * l, 124)
Response.ContentType = "image/gif"
objBitmap.Save(Response.OutputStream, ImageFormat.Gif)

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