Hello,

i have developed one flash tool to develop custom desing.and i am saving it using server code

my code is below

1       protected void Page_Load(object sender, EventArgs e)
2        {
3            if (!IsPostBack)
4            {
5                string  width1 = Request.Form.Get("width");
6                string height1 = Request.Form.Get("height");               
7                string filename = Request.QueryString["dname"].ToString();         
8                int height = Convert.ToInt32(height1);
9            
10               Bitmap bmp = new Bitmap(width, height);
11               bmp = GrayScale(bmp);     
12                 
13               bmp.Save(Server.MapPath(@"~/Uploads/" + filename), ImageFormat.Gif);
14           }
15       }
16       public Bitmap GrayScale(Bitmap Bmp)
17       {
18           int rgb=0;
19           Color c=Color.White;
20           Bmp.MakeTransparent();
21           for (int rows = 0; rows < Bmp.Height; rows++)
22           {
23             
24               string name=Request.Form.Get("px" + rows.ToString());
25               string[] c_row = name.Split(new char[] { ',' } , StringSplitOptions.RemoveEmptyEntries);
26               for (int cols = 0; cols < Bmp.Width; cols++)
27               {
28                     
29                    string value="";
30                    try
31                    {
32                        value = c_row[cols];
33                    }
34                    catch (Exception) { }
35                   if (value != "")
36                   {
37                       string hex = value;
38   			       while(hex.Length< 6)
39                       {
40                           hex = "0" + hex;
41   			        }
42                       string r = gethax(hex.Substring(0, 2));
43                       string g = gethax(hex.Substring(2, 2));
44                       string b = gethax(hex.Substring(4, 2)); 
45                              c = Bmp.GetPixel(cols,rows);
46                 
47                              Bmp.SetPixel(cols, rows, Color.FromArgb(Convert.ToInt32(r), Convert.ToInt32(g), Convert.ToInt32(b)));
48                      
49                   }
50            
51   
52               }
53           }
54           return Bmp;
55       }
56       protected string gethax(string text)
57       {
58           string hex = "";
59           byte[] byt = new byte[7869];
60           byt=System.Text.ASCIIEncoding.ASCII.GetBytes(text);
61           foreach (int i in byt)
62           {
63               hex = Convert.ToString(i, 16);
64           }
65           return hex;
66       }

here i am generating image with  parameters that i am getting from flash file .Image is generated successfully but i am not getting proper background.I am getting gray background.

I want that image with transparent background. i have used graphics.fillrectangal with white color.But it makes whole image white, i am not able to see image formed of flash parameters.

Help me if anyone knows.

Any help will be appreciated.

Thank You. 

Refer to:

http://stackoverflow.com/questions/708860/create-image-with-transparent-background-using-gdi

http://www.codedblog.com/2007/08/28/generating-a-transparent-gif-image-using-c/

http://msdn.microsoft.com/en-us/library/ms172507.aspx

http://forums.asp.net/t/1057792.aspx