Solved

diffrent or sum tow colum in datagridview

Posted on 2011-02-26
5
295 Views
Last Modified: 2012-06-21
i have 4 colums
 1 - name   2- start date   3-end date  4- cost A  5-cost B

1-i want faind diffrent  date betwen c2 and c3 and in new colim name it tot_day
2- i want faind sum  c4 + c5
and c4-c5

i use visaul basic 2005
access
windose aplaction
0
Comment
Question by:ziayd2009
  • 3
  • 2
5 Comments
 
LVL 41

Expert Comment

by:graye
ID: 34989682
If you are using a DataTable to store your 5 existing columns, then you can just add a few extra columns to the DataTable.  These new columns will contain an "expression".   So, in your case, you'd add a new column for tot_day and set it's Expressio property to "[start date]-[end date]"

Take look at this article... it has some downloadable examples too.

http://www.emmet-gray.com/Articles/ADO_Expressions.htm
0
 

Author Comment

by:ziayd2009
ID: 34993386

i  use tihes cood  from example in article
 Dim dc As DataColumn
     
  LoadData()
        dc = New DataColumn("tt1")
        dc.DataType = GetType(Integer)
        dc.Expression = "tt1 + tt3"  ' two column types
        dataset3.Tables("tbl").Columns.Add(dc)
        Me.DataGridView1.DataSource = dataset3.Tables("tbl")

Open in new window

after tht it give me msg :-
Cannot set Expression property due to circular reference in the expression
why is not work
note:-
colum tt1 and tt2 is type of integr
0
 
LVL 41

Expert Comment

by:graye
ID: 34993449
Yeah, you can't call the new column by the name tt1 (in your example).   Call it something else... anything else.
0
 

Author Comment

by:ziayd2009
ID: 34993482
why ,
can  u explain more
what i can call colum ?
 can i call like tot1 or total
thank u
0
 
LVL 41

Accepted Solution

by:
graye earned 50 total points
ID: 34993882
Yeah, that'd do just fine...   the problem is that you can't create a new column using a name that already exists.  So, "total" would do just fine.
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Well, all of us have seen the multiple EXCEL.EXE's in task manager that won't die even if you call the .close, .dispose methods. Try this method to kill any excels in memory. You can copy the kill function to create a check function and replace the …
Microsoft Reports are based on a report definition, which is an XML file that describes data and layout for the report, with a different extension. You can create a client-side report definition language (*.rdlc) file with Visual Studio, and build g…
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

829 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question