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display random images

Posted on 2004-04-28
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Last Modified: 2010-04-07
hey there;

i'd like to display random images each time my asp.net page is reloaded.

these images are all stored in a specified folder on the server in either jpg, gif and png formats.

i simply wish to reach in the folder, grab a random file, then display it.  

must be vb.net code as i'm not a c# programmer.  also, i'm *not* looking for any xml solutions (like the ad rotator uses).

thanks.
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Question by:vbnewbie01
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3 Comments
 
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Expert Comment

by:pml_siva
ID: 10937752

string[]  sDir = Directory.GetFiles(@"E:\images");
                  
Random rnd = new Random();
int iRndIndex = rnd.Next(sDir.Length);
string strDisp = "<img src= '" + sDir[iRndIndex] + "'";
Response.Write(strDisp);
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pml_siva earned 100 total points
ID: 10937814
Dim sDir As String() = Directory.GetFiles("E:\images")
 Dim rnd As Random = New Random
 Dim iRndIndex As Integer = rnd.Next(sDir.Length)
 Dim strDisp As String = "<img src = '" & sDir(iRndIndex) & "'"
 Response.Write(strDisp)
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Author Comment

by:vbnewbie01
ID: 10941690
strong work, pml siva;.  thanks.

however, i made a couple of modifications in case anyone else is looking to do a similar thing by having your image displayed using an asp.net control.

first, i put the code in my Page_Load event, then i had to append the opening line to read System.IO (in front of the DIrectory.GetFiles)

next, i put an image control (asp:image id="imgRandomPhoto" runat="server") in my html code.

i called it in the Page_Load event using:

imgRandomPhoto.imageURL=sDir(iRndIndex)

entire code written below
---------------------------------------------------

Dim sDir As String() = System.IO.Directory.GetFiles("C:\Inetpub\wwwroot\Website\uploaded_images")

Dim rnd As Random = New Random
Dim iRndIndex As Integer = rnd.Next(sDir.Length)
Dim strDisp As String = "<img src = '" & sDir(iRndIndex) & "'"
            
imgRandomPhoto.imageURL=sDir(iRndIndex)

----------------------------------------------------

thanks again.
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