以下代码未在mozilla firefox中显示任何输出..而在Internet Explorer中清楚地显示了输出 [英] the following code is not showing any outputs in mozilla firefox..while the output is clearly shown in internet explorer
本文介绍了以下代码未在mozilla firefox中显示任何输出..而在Internet Explorer中清楚地显示了输出的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
2
3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
4
5 <html xmlns="http://www.w3.org/1999/xhtml" >
6 <head runat="server">
7 <title>Untitled Page</title>
8 </head>
9 <body>
10 <form id="form1" runat="server">
11 <div>
12 <table>
13 <tr>
14 <td align="center">ASP.NET2 Slide Show<hr />
15 </td>
16 </tr>
17 <tr>
18 <td align="center">
19 <img id="photo" src="" runat="server" border="0" />
20 </td>
21 </tr>
22 </table>
23 </div>
24 </form>
25
26 <script type="text/javascript">
27 //A timer will be fired in 5 seconds to call getNextImage()
28 var c_interval = 5000;
29 window.setTimeout("getNextImage()", c_interval);
30
31 function getNextImage()
32 {
33 //Send the request to server with the current image url as the argument
34 CallServer(document.getElementById("photo").src, "");
35 }
36
37 function ReceiveServerData(rValue)
38 {
39 //Receive server's response of a string rValue, which is prepared in the server's function
40 //GetCallbackResult()
41 var wds = rValue.split(";");
42 //Assign the transition effect
43 document.getElementById("photo").style.filter = wds[1];
44 //Preload the image file from server. When finishing download, imageLoaded function will be called
45 //with the img object as the argument
46 var img = new Image();
47 img.onload = function(){ imageLoaded(this); }
48 img.onerror = function(){ imageError(this); }
49 img.onabort = function(){ imageError(this); }
50 img.src = wds[0];
51 }
52 function imageError(img)
53 {
54 //If image download errors occur, this function will be called.
55 window.setTimeout("getNextImage()", 1000);
56 }
57 function imageLoaded(img)
58 {
59 var photo = document.getElementById("photo"); //Find the image control object
60 photo.filters[0].apply(); //Apply the transition effect
61 photo.filters[0].play(); //Play the effect and display the new image
62 photo.src = img.src; //Assign the image to the image control
63
64 window.setTimeout("getNextImage()", c_interval);//Initiate the next request
65 }
66 </script>
67
68 </body>
69 </html>
public partial class _Default : System.Web.UI.Page, System.Web.UI.ICallbackEventHandler
14 {
15 string m_lastFileName = "none";
16
17 protected void Page_Load(object sender, EventArgs e)
18 {
19 if (IsPostBack)
20 return;
21
22 photo.Src = GetNextImageUrl();
23
24 //Register Ajax client script to client's browsers. This has to be hard coded.
25 string cbReference = Page.ClientScript.GetCallbackEventReference(this, "arg", "ReceiveServerData", "context");
26 string callbackScript = "function CallServer(arg, context)" + "{ " + cbReference + "} ;";
27 Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "CallServer", callbackScript, true);
28 }
29
30 public void RaiseCallbackEvent(string eventArgument)
31 {
32 //This is first place to receive the callback from client's browser. The parameter 'eventArgument'
33 //is the parameter passed from the Javascript's call 'CallServer()'. In this example, it is the
34 //last image url.
35 m_lastFileName = Path.GetFileName(eventArgument);
36 }
37
38 public string GetCallbackResult()
39 {
40 //This is the second call triggled by the 'CallServer()' and it is the place to prepare and return a string
41 //to the client. Here the returned string is the image url and the transition effect.
42 return GetNextImageUrl() + ";" + GetNextTransition();
43 }
44
45 private string GetNextImageUrl()
46 {
47 //Randomly pick a image file in the server.
48 string[] files = Directory.GetFiles(AppDomain.CurrentDomain.BaseDirectory + "images", "*.jpg");
49 if (files.Length == 0)
50 return string.Empty;
51
52 while (true)
53 {
54 int n = (int)((files.Length - 1) * (new Random()).NextDouble());
55 //Do not want to repeat the last image
56 if (files[n].IndexOf(m_lastFileName) < 0)
57 {
58 return files[n].Replace(AppDomain.CurrentDomain.BaseDirectory, string.Empty);
59 }
60 }
61 }
62 private string GetNextTransition()
63 {
64 //Randomly pick a transition effect. Note some of the effects only work in IE.
65 int n = (int)((new Random().NextDouble()) * 5);
66 switch (n)
67 {
68 case 0:
69 case 1:
70 n = (int)((new Random().NextDouble()) * 22);
71 return "revealTrans(duration=2,transition=" + n.ToString() + ")";
72 case 2:
73 case 3:
74 if (Request.Browser.Browser == "IE")
75 {
76 n = (int)((new Random().NextDouble()) * 8);
77 switch (n)
78 {
79 case 0:
80 return "progid:DXImageTransform.Microsoft.RandomDissolve()";
81 case 1:
82 return "progid:DXImageTransform.Microsoft.Pixelate(MaxSquare=20, Duration=2, Enabled=false)";
83 case 2:
84 return "progid:DXImageTransform.Microsoft.RadialWipe(wipeStyle='clock')";
85 case 3:
86 return "progid:DXImageTransform.Microsoft.Wheel(spokes=4)";
87 case 4:
88 return "progid:DXImageTransform.Microsoft.Stretch(stretchStyle='spin')";
89 default:
90 return "progid:DXImageTransform.Microsoft.Stretch(stretchStyle='push')";
91 }
92 }
93 else
94 return "blendTrans(duration=2)";
95 default:
96 return "blendTrans(duration=2)";
97 }
98 }
99 }
推荐答案
我想我可能已经发现您的问题了……我我猜想GetNextTransition中的case语句都不会在IE之外的任何浏览器中运行，因为它们是MS特定的，这意味着它们可能不受任何其他浏览器支持.不确定，您必须检查一下，但这是我的猜测.您的代码实际上说:请注意，某些效果仅在IE中有效..因此，除非我完全错过了重点...
I think I may have spotted your problem... I''m guessing that none of the case statements in GetNextTransition will run in any browser other than IE as they are MS specific which means they are probably not supported on any other browser. Not entirely certain and you''ll have to check it but that would be my guess. Your code actually says: Note some of the effects only work in IE.. So, unless I''ve utterly missed the point...
您使用的是DirectX Transitions(仅受IE支持)，否则其他浏览器只会忽略它.
You are using DirectX Transitions which is supported only by IE, other browsers simply ignore it.
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