How to run .net function in ColdFusion

Question

I'm a junior C# developer and I'm trying to learn Web Development with ColdFusion. I'm having difficulty running this example in the documentation: Using a .NET class directly. This is just a simple cfm code to test .NET function on ColdFusion.

<cffunction name="Ping" returntype="string" output="false"> 
    <cfargument name="host" type="string" required="yes"> 
    <!--- Local variables ---> 
    <cfset var pingClass=""> 
    <cfset var pingReply=""> 
    <!--- Get Ping class ---> 
    <cfobject type=".NET" name="pingClass" 
            class="System.Net.NetworkInformation.Ping"> 
    <!--- Perform synchronous ping (using defaults) --->  
    <cfset pingReply=pingClass.Send(Arguments.host)> 
    <!--- Return result ---> 
    <cfreturn pingReply.Get_Status().ToString()> 
</cffunction>

I installed ColdFusion 2016 with these settings: Server Configuration, Production Profile + Secure Profile with IP address 127.0.0.1, .NET integration Service, and Built-in web server.

I placed the CFM code here C:\ColdFusion2016\cfusion\wwwroot\test.cfm and I ran it through the browser like this http://127.0.0.1:8500/test.cfm. The error that I get from jnbridge log is "Class Not Found". I have .NET framework installed and the ColdFusion .NET service is running. I also tried restarting everything but it still won't work. Please help. Thank you.

Tip: You may want to take a look at cfscript. As of CF11+, just about anything you can do with CFML ie tags, is also supported in cfscript. The syntax is very similar to java / C#, so you may find it more natural coming from C#. — Leigh

Henry Henry · Accepted Answer · 2017-01-27T01:26:01

Class System.Net.NetworkInformation.Ping not found in the specified assembly list.

The assembly that contains the class must be provided to the assembly attribute.

https://helpx.adobe.com/coldfusion/cfml-reference/coldfusion-tags/tags-m-o/cfobject-net-object.html

http://cfdocs.org/cfobject

This seems to work:

<cfobject type="dotnet" name="pingClass"
    assembly="C:\Windows\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll"
    class="System.Net.NetworkInformation.Ping">

You can also use createObject() instead of <cfobject>. http://cfdocs.org/createobject

How to run .net function in ColdFusion

2 Answers