xsl server variable returns null

xsl server variable URL returns null. I tried all the other server variable and they all returns nulls.

Is there anything I need to do (like in IIS or web.config) in order for xsl to show server variables? (i am working on webpart in sharepoint).

1. <ParameterBinding Name="URL" Location="ServerVariable(URL)" DefaultValue=""/>
开发者_高级运维
2. <xsl:param name="$URL"/>

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Your XSL parameter should be declared with the name "URL", not "$URL":

<xsl:param name="URL" />