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檢測是否已安裝 .NET Framework 3.5的js腳本

 更新時間：2009年02月14日 14:07:09   作者：  
管理員必須首先確認存在 .NET Framework 3.5 運行庫，然后才能將 Windows Presentation Foundation (WPF) 應用程序部署在面向 .NET Framework 3.5 的系統(tǒng)上。
本主題提供一個以 HTML/JavaScript 編寫的腳本，管理員可以使用該腳本來確定系統(tǒng)上是否存在 .NET Framework 3.5。
復制代碼 代碼如下:

<HTML>
<HEAD>
<TITLE>Test for the .NET Framework 3.5</TITLE>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8" />
<SCRIPT LANGUAGE="JavaScript">
<!--
var dotNETRuntimeVersion = "3.5.0.0";

function window::onload()
{
if (HasRuntimeVersion(dotNETRuntimeVersion))
{
result.innerText =
"This machine has the correct version of the .NET Framework 3.5."
}
else
{
result.innerText =
"This machine does not have the correct version of the .NET Framework 3.5." +
" The required version is v" + dotNETRuntimeVersion + ".";
}
result.innerText += "\n\nThis machine's userAgent string is: " +
navigator.userAgent + ".";
}

//
// Retrieve the version from the user agent string and
// compare with the specified version.
//
function HasRuntimeVersion(versionToCheck)
{
var userAgentString =
navigator.userAgent.match(/.NET CLR [0-9.]+/g);
if (userAgentString != null)
{
var i;
for (i = 0; i < userAgentString.length; ++i)
{
if (CompareVersions(GetVersion(versionToCheck),
GetVersion(userAgentString[i])) <= 0)
return true;
}
}
return false;
}
//
// Extract the numeric part of the version string.
//
function GetVersion(versionString)
{
var numericString =
versionString.match(/([0-9]+)\.([0-9]+)\.([0-9]+)/i);
return numericString.slice(1);
}
//
// Compare the 2 version strings by converting them to numeric format.
//
function CompareVersions(version1, version2)
{
for (i = 0; i < version1.length; ++i)
{
var number1 = new Number(version1[i]);
var number2 = new Number(version2[i]);
if (number1 < number2)
return -1;
if (number1 > number2)
return 1;
}
return 0;
}

-->
</SCRIPT>
</HEAD>

<BODY>
<div id="result" />
</BODY>
</HTML>

如果搜索“.NET CLR”版本成功，將顯示以下類型的狀態(tài)消息：
This machine has the correct version of the .NET Framework 3.5.
This machine's userAgent string is: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 1.1.4322; InfoPath.2; .NET CLR 3.0.590; .NET CLR 3.5.20726; MS-RTC LM 8).
否則，顯示以下類型的狀態(tài)消息：
This machine does not have the correct version of the .NET Framework 3.5. The required version is v3.5.0.0.
This machine's userAgent string is: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 1.1.4322; InfoPath.2; .NET CLR 3.0.590; MS-RTC LM 8).

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