Solved

sort dataview to display distinct nrs in field? e.g. Name1, Name1, Name2  : Display Name1, Name2

Posted on 2004-09-23
5
1,400 Views
Last Modified: 2006-11-17
hi, i have a dataview and there are for e.g. 3 rows in the dataview.
MyName   MyDesc
Name1     TestData
Name1     TestData
Name2     TestData

what i need to do is determine how many distinct values are in the MyName Field.
thus it would be that the value would be 2.

how can i filter to see distinct values of a field in a dataview.
thanks!

0
Comment
Question by:jxharding
  • 2
  • 2
5 Comments
 

Author Comment

by:jxharding
ID: 12131572
im using SQL Server and VB.net
0
 
LVL 10

Expert Comment

by:123654789987
ID: 12131773
First u can sort the dataview using

myDataView.Sort = "MyName DESC"

Then using this code snippet. There is no direct method in Dataview.

dataTable1 = myDataView.DataTable
Dim i as int
Dim distinctCounter as int
Dim value as string
value = " "
for i = 0 to dataTable1.Rows.Count - 1
if  value == dataTable1.Rows[0]["MyName"] then
distinctCounter += 1
else
value = dataTable1.Rows[0]["MyName"]
End if
Next i

0
 
LVL 10

Accepted Solution

by:
123654789987 earned 500 total points
ID: 12131781
There is small change in the code

dataTable1 = myDataView.DataTable // Get the datatable bound to the dataview
Dim i as int
Dim distinctCounter as int  //Counter of distinct names
Dim value as string  //temperoray variable
value = " "
for i = 0 to dataTable1.Rows.Count - 1
if  value == dataTable1.Rows[i]["MyName"] then
distinctCounter += 1
else
value = dataTable1.Rows[i]["MyName"]
End if
Next i


0
 
LVL 8

Expert Comment

by:rajaloysious
ID: 12131908
You can use SelectDistinct method as below....
http://support.microsoft.com/default.aspx?scid=kb;en-us;326176

Cheers...
0
 

Author Comment

by:jxharding
ID: 12132145
hi,
rajaloysious, i posted the accept too quickly, the link also did the job excellently.
thank you both


0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
IO.FileSystemWatcher dies when used in Powershell 1 45
Authentication of Web Services 3 53
Error on Add method 1 38
Variable Event ? 3 23
It seems a simple enough task, yet I see repeated questions asking how to do it: how to pass data between two forms. In this article, I will show you the different mechanisms available for you to do just that. This article is directed towards the .N…
Recently while returning home from work my wife (another .NET developer) was murmuring something. On further poking she said that she has been assigned a task where she has to serialize and deserialize objects and she is afraid of serialization. Wha…
This Micro Tutorial demonstrates using Microsoft Excel pivot tables, how to reverse engineer competitors' marketing strategies through backlinks.
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…

867 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

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now