Question

我想确定访问silverlight Web应用程序的客户端是否安装了silverlight运行时，如果不是，我想重定向到显示无法运行应用程序的原因的aspx页面（而不是消息框告诉缺少silverlight插件）。怎么做？

Answer 1

此Javascript提供警告我确信可以将其更改为重定向用户

function hasSilverlightPlugin() {
    var slplugin = false;
    var browser = navigator.appName; // Get the browser type

    if (browser == 'Microsoft Internet Explorer') {
        try {
            var slControl = new ActiveXObject('AgControl.AgControl');
            if (slControl) {
                slplugin = true;
            }
        } catch (e) { }
    }
    else {
        // Netscape, FireFox, Google chrome etc
        try {
            if (navigator.plugins["Silverlight Plug-In"]) {
                slplugin = true;
            }
        } catch (e) { }
    }
    return slplugin;
}


/** This function checks the browser to see if Silverlight has been installed.
* The display informing the user that his/her browser is lacking the plugin
* is shown in the Announcements section of the desktop tab.
*/
function silverlightAnnouncementWarning() {
    var elem = null;
    var hasPlugin = hasSilverlightPlugin();
    elem = document.getElementById("SilverlightWaringElem");
    if (!hasPlugin) {

        if (elem) {
            elem.style.display = "";
            var warningMsg = "WARNING THE SILVERLIGHT PLUGIN IS NOT INSTALLED ON THIS MACHINE"
            elem.innerHTML = warningMsg;
        }
    }
    //64 bit silverlight warning
    if (navigator.platform == "Win64") {
        if (elem) {
            var warningMsg = "64 bit browser has been detected which is currently incompatible with Silverlight"
            elem.style.display = "";
            var msg = elem.innerHTML;
            if (msg && msg.length > 0) {
                warningMsg = msg + " (also a " + warningMsg + ")";
            } else {
                warningMsg = "A " + warningMsg;
            }
            elem.innerHTML = warningMsg;
        }
    }
}

function popupSilverlightWarning() {
    var hasPlugin = hasSilverlightPlugin();
    if (!hasPlugin) {
        var warningMsg = "THE SILVERLIGHT PLUGIN IS NOT INSTALLED ON THIS MACHINE!\n";
        warningMsg += "This page requires the Silverlight plugin in order to work.\n";
        warningMsg += "Please contact your Systems Administrator to have the Silverlight plugin installed on this computer.\n";
        warningMsg += "Thank you . . .";
        alert(warningMsg);
    }
}

Answer 2

上面的JavaScript很不错，但是Silverlight 4.0有一个很好的JavaScript file，每个项目都可以让这类东西变得更容易。

http://msdn.microsoft.com/en-us/library/cc265155(vs.95).aspx

如果客户端没有silverlight运行时，则重定向页面

2 个答案: