[Webinar] Streamline your web hosting managementRegister Today

x
?
Solved

Vb.net Datatable -> if statement to check if the value exists then amend the table

Posted on 2014-02-05
3
Medium Priority
?
2,093 Views
Last Modified: 2014-02-05
Hi ALL,

Below if the code i have so far and I have 2 questions really....

1) i have an error "BC30311: Value of type 'System.Collections.Generic.IEnumerable(Of System.Data.DataRow)' cannot be converted to 'Boolean'." on row If scorestable.Rows.Cast(Of DataRow)().Where(Function(n) n("Score").ToString() = thescorestext then


2) Can i do this with less code and make it quicker/neater?

I have commented the below code to show what i wanted it to do....

      
 	'Check to see if anyrows in HomeTeam contain a value
	 Dim count = scorestable.Rows.Cast(Of DataRow)().Where(Function(n) n("HomeTeam").ToString() = StringOutNumbers(div.selectSingleNode(".//td[@class='home']").InnerText)).Count()
'Find the count
if count = 0 then

'add row to the datatable as no results where found
scorestable.Rows.Add(StringOutNumbers(div.selectSingleNode(".//td[@class='home']").InnerText), div.selectSingleNode(".//td[@class='time']").InnerText.Trim().Substring(0, 2) , thescorestext)

else
'A matching result was found so now check to see if the Scores section of the result matches the value - thescorestext

If scorestable.Rows.Cast(Of DataRow)().Where(Function(n) n("Score").ToString() = thescorestext then
'Yes it does match the score so we just need to update the column of the row with the correct time
Dim scoresRow() As Data.DataRow
'Make sure i have selected the correct team
scoresRow = scorestable.Select("HomeTeam = StringOutNumbers(div.selectSingleNode(".//td[@class='home']").InnerText)")
'Update the time row'
scoresRow(0)("Time") = div.selectSingleNode(".//td[@class='time']").InnerText.Trim().Substring(0, 2)

else

'The score does not match meaning i need to update both the score and the time

Dim scoresRow() As Data.DataRow
'Make sure i have selected the correct team
scoresRow = scorestable.Select("HomeTeam = StringOutNumbers(div.selectSingleNode(".//td[@class='home']").InnerText)")
'update score
scoresRow(0)("Score") = thescorestext
'Update time
scoresRow(0)("Time") = div.selectSingleNode(".//td[@class='time']").InnerText.Trim().Substring(0, 2)
end if

end if

Open in new window

0
Comment
Question by:runnerjp2005
3 Comments
 
LVL 64

Accepted Solution

by:
Fernando Soto earned 2000 total points
ID: 39835405
Hi runnerjp2005;

In the following If statement the test needs to return a Boolean type.

If scorestable.Rows.Cast(Of DataRow)().Where(Function(n) n("Score").ToString() = thescorestext then

Open in new window

The Test
scorestable.Rows.Cast(Of DataRow)().Where(Function(n) n("Score").ToString() = thescorestext

Open in new window

is missing a ")" at the end of the statement. But even if you put a ")" it returns a Collection of DataRows and NOT a Boolean. You need to change the statement so that it returns a Boolean something like the following.
scorestable.Rows.Cast(Of DataRow)().Where(Function(n) n("Score").ToString() = thescorestext).Count > 0

Open in new window

0
 

Author Comment

by:runnerjp2005
ID: 39835508
now i get  Identifier expected on scoresRow = scorestable.Select("HomeTeam = StringOutNumbers(div.selectSingleNode(".//td[@class='home']").InnerText)")
0
 
LVL 83

Expert Comment

by:CodeCruiser
ID: 39835706
Try following


scorestable.Rows.Cast(Of DataRow)().Where(Function(n) n("Score").ToString())(0)("Score") = thescorestext

Another option is to use dataview

scorestable.DefaultView.RowFilter = "Score='" & thescorestext & "'"
if scorestable.DefaultView.Count > 0 Then
   'score found
else
   'not found
End If
0

Featured Post

The new generation of project management tools

With monday.com’s project management tool, you can see what everyone on your team is working in a single glance. Its intuitive dashboards are customizable, so you can create systems that work for you.

Question has a verified solution.

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

Today I had a very interesting conundrum that had to get solved quickly. Needless to say, it wasn't resolved quickly because when we needed it we were very rushed, but as soon as the conference call was over and I took a step back I saw the correct …
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
The video provides a quick and easy steps to migrate MBOX file to well known Outlook PST and Office 365. Besides this, it also supports and migrates more than 20 email clients of MBOX which include AppleMail, Opera, Thunderbird and SeaMonkey effortl…
Hi, this video explains a free download that you can incorporate into your Access databases, or use stand-alone for contact management. Contacts -- Names, Addresses, Phone Numbers, eMail Addresses, Websites, Lists, Projects, Notes, Attachments…
Suggested Courses

612 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