How to add a extra function for expressions

[rajendra.meenaMZ6F3]

How to add an extra function for expressions if it is not available please refer attached image

[andrewpuller3811]

what functions are you looking to use that are not listed?

Sometimes you can copy expressions from other areas of civil 3d and use them even if they are not listed.

Depending on what you are looking to do, you may be able to construct an expression and reference it from the expression you are working in.

[rajendra.meenaMZ6F3]

andrewpuller3811, let us say I want to add curve no expression in curve alignment table labeling.

[rajendra.meenaMZ6F3]

if you have any demo video you can share with me.

[Pointdump]

Hi Rajendra,
Please share a screen shot of a curve and how you would like it labelled.
Dave

[rajendra.meenaMZ6F3]

hi @Pointdump I uploaded an image of curve labeling you can review it.

[rajendra.meenaMZ6F3]

how I can add an expression for curve number here because it is not available in the list?

[ChrisRS]

As is often the case with Civil 3D, the answer is no ... and sometimes Yes.

1. I think that you have already been given the best available information.
   In general, the answer is no.
2. You did not ask directly, but there may be a solution to the specific curve number problem you mentioned.
   You do not say, and it would be nice if you did, but it looks like you are working with Alignment labels. If so:
   1. The "Alignment Line Segment Number" and "Alignment Curve Segment Number" properties are probably what you are looking for.
   2. Cutting and Pasting or manually entering these properties into the expression editor does not work. These properties are not available to the expression engine. There may be a good reason, but it appears to be a secret. 
   3.  These properties are, however, available to the Label Style Composer (LSC) and are, in fact, already used by the Tag components.
   4. The illustration shows modified Tag components used in labels. 
      Tags are visible in "Label and Tag Modes," and the anchor component was changed. (These properties can be used directly in their own text component.)
   5. Tags can be manually updated via EDITTAGNUMBERS or by clicking Renumber Tags on the toolbar. The label must be in Tag mode to do this. 

Here is a link that may be helpful: 
Solved: Alignment Curve Segment Number - Autodesk Community - Civil 3D

I have not investigated their use in tables.

That's all I got. I hope it helps.

The drawing file is attached for your convenience.

Good Luck!

[rl_jackson]

I'm wondering if property data might not be a solution, expressions are also available there and to labels... Investigation needed.

[rajendra.meenaMZ6F3]

It works when you apply for single segments in the Indian tool kit once I apply multiple segments with the table it does not give a curve also if add an expression alignment segment curve it starting value is 100 .