How to remove a constraint and add it back in .NET environment ?

Answered

Jia-Kai Kuo

• September 19, 2020 07:06

I've found the way to do that in Python like https://support.gurobi.com/hc/en-us/community/posts/360047909572-how-to-remove-and-add-back-a-constraint-?page=1#community_comment_360012823711  do.

But if I want to add constraint back in a .NET environment, how can I do to get the lhs of the constraint c?
I found that there's no attribute 'LHS' in a constraint of .NET environment so I don't know how to do that.

Thanks!!

0

• Official comment

  

  Simranjit Kaur

  Gurobi Staff

  • December 06, 2024 00:41

  This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum. Or why not try our AI Gurobot?.
• 

  Jaromił Najman

  Gurobi Staff

  • September 21, 2020 09:31

  Hi,

  You can get the LHS by using the getRow() function.

  Best regards,
  Jaromił

  1
• 

  Jia-Kai Kuo

  • September 22, 2020 12:34

  

  

  

  Hi Jaromił,

  Thanks! 

  For better understanding, take the following constraint for example:

  GRBConstr c : x1 + 2 x3 + 3 x3 >= 6
  
  If I use getRow(c), I will get a GRBLinExpr : x1 + 2 x3 + 3 x3  , right?
  
  Thanks again!

  0
• 

  Jaromił Najman

  Gurobi Staff

  • September 23, 2020 07:19

  Hi Jia-Kai,

  Correct, that's what you would get.

  Have a look at the answers of this community post. It's for the Python API but it works the same for the .NET API.

  Best regards,
  Jaromił

  0

Post is closed for comments.