multi line style customization by coding

[S_S_SS]

Hello every one ....
i want to make a multi line that have a field and this field contain the length of the multi line 
like that image 

 and the field is this red text , the length of the multi line and it divided by 1000 to convert length from mm to meter 
and rounding to the largest by 0.50 m .......

[S_S_SS]

Hello every one ....
i want to make a multi line that have a field and this field contain the length of the multi line 
like that image 

 and the field is this red text , the length of the multi line and it divided by 1000 to convert length from mm to meter 
and rounding to the largest by 0.50 m .......

[pendean]

See your other duplicate post: MLINE objects/settings do not do this, you'll need to explore using Blocks/Dynamic blocks instead.

[Sea-Haven · Accepted solution]

You can get the length of a mline from the co-ordinates and write a text answer but it will not update if you change a end. But if you use a custom dim style it will change need a "prefix <> suffix" turn off all the arrows and lines etc.

[S_S_SS]

idea for dimensions is a great idea thanks about that ....