开发DNN模块之Utility

Posted in [DNN使用及思考], [DNN模块开发], [杂项] By baldwin

列举一些可能我们在开发DNN模块中需要的Utility,比如获取文件的绝对路径等等,有时我们在开发模块的过程中,不妨多去DNN核心代码里边查看,也许你想实现的方法本来DNN已径实现了,那就没有必要自己再重写一遍了,毕竟我们的项目都是在DNN核心架构上开发的,尽量利用原有的代码总是最佳捷径,推荐大家去看看Library\Components\Shared\Globals.vb这个类,这个类有很多我们需要的方法.Enjoy DNN...

1) 获取某一文件的绝对路径,比如我们在模块开发时需要调用的aspx页面或web service文件等等

获取文件的绝对路径

''' <summary>

''' Get the complete url to a file

''' </summary>

''' <param name="URL">the url to be resolved ( such as modulepath )</param>

''' <returns></returns>

''' <remarks></remarks>

Public Shared Function AddHost(ByVal URL As String) As String

' just in case a stateless thread calls this method (it could happen)

If HttpContext.Current Is Nothing Then

Return URL

End If

Dim result As String

Dim host As String = HttpContext.Current.Request.ServerVariables("HTTP_HOST").TrimEnd("/"c)

'Dim host As String = HttpContext.Current.Request.ServerVariables("SERVER_NAME")

If URL.ToLower.Contains(host.ToLower) Then

result = URL

Else

'String.Concat - this is MUCH faster on a high traffic site

If Not URL.StartsWith("/") Then URL = String.Concat("/", URL)

result = String.Concat(host, URL)

End If

Return DotNetNuke.Common.Globals.AddHTTP(result)

End Function

2)客户端用js获取asp.net服务器控件RadioButtonList的选中值,其主要原理是,RadioButtonList在客户端是被解析成了table，通过getElementsByTagName("INPUT")方法可获取它的所有子radio，然后循环每个radio，判断是否处于选中状态checked,再通过cells获取radio的text或value值.

获取RadioButtonList的选中值

function GetSelectvalue(parentElement)

{

var TargetValue;

var listContainer = parentElement.getElementsByTagName("INPUT");

var ItemCount = listContainer.length;

for (var i=0;i<ItemCount;i++)

{

if (listContainer[i].checked)

{

TargetValue = listContainer[i].value;

break;

}

return TargetValue;

}

Popular tags:Utility, ClientAPI, DNN架构
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