Solved: slide show | Experts Exchange

Roman Gherman

10/10/2011

you have a check for Internet explorer - it will do a different thing than for other browsers:
- if (Request.Browser.Browser == "IE")

But for other browsers it is doing something different.
return "blendTrans(duration=2)";

well it is hard to say what is not working without knowing the problem and code.

it could be that that way it should work for browsers different than Internet explorer

JCWEBHOST

10/10/2011

ASKER

yes it works in IE but does noting in Google chrome

JCWEBHOST

10/10/2011

ASKER

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;

public partial class _Default : System.Web.UI.Page, System.Web.UI.ICallbackEventHandler
{
    string m_lastFileName = "none";

    protected void Page_Load(object sender, EventArgs e)
    {
        if (IsPostBack)
            return;

        photo.Src = GetNextImageUrl();

        //Register Ajax client script to client's browsers.  This has to be hard coded.
        string cbReference = Page.ClientScript.GetCallbackEventReference(this, "arg", "ReceiveServerData", "context");
        string callbackScript = "function CallServer(arg, context)" + "{ " + cbReference + "} ;";
        Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "CallServer", callbackScript, true);
    }

    public void RaiseCallbackEvent(string eventArgument)
    {
        //This is first place to receive the callback from client's browser.  The parameter 'eventArgument'
        //is the parameter passed from the Javascript's call 'CallServer()'.  In this example, it is the
        //last image url.
        m_lastFileName = Path.GetFileName(eventArgument);
    }

    public string GetCallbackResult()
    {
        //This is the second call triggled by the 'CallServer()' and it is the place to prepare and return a string
        //to the client.  Here the returned string is the image url and the transition effect.
        return GetNextImageUrl() + ";" + GetNextTransition();
    }

    private string GetNextImageUrl()
    {
        //Randomly pick a image file in the server.
        string[] files = Directory.GetFiles(AppDomain.CurrentDomain.BaseDirectory + "images", "*.jpg");
        if (files.Length == 0)
            return string.Empty;

        while (true)
        {
            int n = (int)((files.Length - 1) * (new Random()).NextDouble());
            //Do not want to repeat the last image
            if (files[n].IndexOf(m_lastFileName) < 0)
            {
                return files[n].Replace(AppDomain.CurrentDomain.BaseDirectory, string.Empty);
            }
        }
    }
    private string GetNextTransition()
    {
        //Randomly pick a transition effect.  Note some of the effects only work in IE.
        int n = (int)((new Random().NextDouble()) * 5);
        switch (n)
        {
            case 0:
            case 1:
                n = (int)((new Random().NextDouble()) * 22);
                return "revealTrans(duration=2,transition=" + n.ToString() + ")";
            case 2:
            case 3:
                if (Request.Browser.Browser == "IE")
                {
                    n = (int)((new Random().NextDouble()) * 8);
                    switch (n)
                    {
                        case 0:
                            return "progid:DXImageTransform.Microsoft.RandomDissolve()";
                        case 1:
                            return "progid:DXImageTransform.Microsoft.Pixelate(MaxSquare=20, Duration=2, Enabled=false)";
                        case 2:
                            return "progid:DXImageTransform.Microsoft.RadialWipe(wipeStyle='clock')";
                        case 3:
                            return "progid:DXImageTransform.Microsoft.Wheel(spokes=4)";
                        case 4:
                            return "progid:DXImageTransform.Microsoft.Stretch(stretchStyle='spin')";
                        default:
                            return "progid:DXImageTransform.Microsoft.Stretch(stretchStyle='push')";
                    }
                }
                else
                    return "blendTrans(duration=2)";
            default:
                return "blendTrans(duration=2)";
        }
    }
}

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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <table>
        <tr>
            <td align="center">ASP.NET2 Slide Show<hr />
            </td>
        </tr>
        <tr>
            <td align="center">
                <img id="photo" src="" runat="server" border="0"/>
            </td>
        </tr>
    </table>
    </div>
    </form>

    <script type="text/javascript">
        //A timer will be fired in 5 seconds to call getNextImage()
        var c_interval = 5000;
        window.setTimeout("getNextImage()", c_interval);
        
        function getNextImage()
        {
            //Send the request to server with the current image url as the argument
            CallServer(document.getElementById("photo").src, "");
        }
                  
        function ReceiveServerData(rValue)
        {
            //Receive server's response of a string rValue, which is prepared in the server's function
            //GetCallbackResult()
            var wds = rValue.split(";");
            //Assign the transition effect
            document.getElementById("photo").style.filter = wds[1];
            //Preload the image file from server.  When finishing download, imageLoaded function will be called
            //with the img object as the argument                           
            var img  = new Image();
            img.onload = function(){ imageLoaded(this); }
            img.onerror = function(){ imageError(this); }
            img.onabort = function(){ imageError(this); }
            img.src = wds[0];                                            
        }
        function imageError(img)
        {
            //If image download errors occur, this function will be called.
            window.setTimeout("getNextImage()", 1000);
        }
        function imageLoaded(img)
        {
            var photo = document.getElementById("photo");   //Find the image control object
            photo.filters[0].apply();                       //Apply the transition effect
            photo.filters[0].play();                        //Play the effect and display the new image
            photo.src = img.src;                            //Assign the image to the image control
            
            window.setTimeout("getNextImage()", c_interval);//Initiate the next request
        }
    </script>

</body>
</html>

Open in new window

Roman Gherman

10/10/2011

do you have anywhere the Javascript function "blendTrans" defined?

I cant see it anywere.

JCWEBHOST

10/10/2011

ASKER

nope

JCWEBHOST

10/10/2011

ASKER

slideshow.zip

JCWEBHOST

10/10/2011

ASKER

thats my project

Roman Gherman

10/10/2011

OK, that will not work on other browsers except IE.
This is because almost all that code is specific for IE, sorry, but you will have to chose another slideshow component.

Regards,
Roman

JCWEBHOST

10/10/2011

ASKER

ok can you help me find one that will work in IE and google?