Creating A Sort Expressions For Datatable?

Feb 2, 2010

I have got a datatable which contains many columns in which three are main:

hotelid
dshotelid
hotelname

Some hotels contain only dshotelid, some contains only hotelid and some contain both dshotelid and hotelid.

I need sort in such way so that those hotels who got both dshotelid and hotelid should be on top and then those hotels who have got only dshotelid and at last those hotels who have got only hotelid...

create such a sort expression.

I created this :

dtmaintable.DefaultView.Sort = "dshotelid, hotelid"

but it Is not giving me desired output.

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Creating DataTable And Copy Existing DataTable Schema?

Feb 17, 2011

I'm using vb.net 2010.I have a DataSet with a Table and data. MyDataSet1 which contains Table1 I want to create another table that is the same as the Table1 but without data, but it should have the columns, etc.

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How To Sort A DataTable

Jun 22, 2010

I'm trying to sort a DataTable using the following code:

Private Function sortDataTable(ByVal dTable As DataTable) As DataTable
Dim dView As New DataView(dTable)
dView.Sort = "Field ASC"
Return dTable
End Function

But it doesn't work. What is wrong? How can I sort the DataTable?

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I was asked this question recently in a test, which I didn't pass. For the life of me, I couldn't spot what the problem was. It's probably something really obvious as well, but even a colleague of mine couldn't spot it either. The best I could come up with was issues with bottlenecks and naming inconsistencies of parameters! I blame it on the fact I've not done any vb.net for years, I've been doing C# mostly these days

[Code]...

The question: This function, although it will successfully sort a datatable, has a major problem with it.What is the problem? Re-write the function in either C# or VB.Net using LINQ.

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How To Sort By Columns In A Datatable

Sep 1, 2011

I currently have a datagridview that is built from a datatable So lets say we have 6 columns

A B C D E G

So the users will select there data from another program and paste into the the table. So lets assume that the data that is pasted is; (the column names are automatically put in)

A B C D E G
123 456 789 101 112 134

So the table will now look like following (I remove the first row because its the same as the column name)

A B C D E G
A B C D E G
123 456 789 101 112 134

My problem is that the users can rearrange thier tables(column index) so lets say user A has the table in this format

A B D E C G
123 456 101 112 789 134

So when they paste into the program, it will look like

A B C D E G
A B D E C G
123 456 101 112 789 134

So now "C" "D" "E" are incorrect and i need to swap those columns to be the same as the column name. I'm not sure how to attack this problem.My thoughts were to paste the data as is, than see what the first row in each column equals.so if it equals "A" assign it an index 0

B 1
C 2

This seems theres too many steps and will slow down the app...

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I need to sort a datatable. I do it with linq this an example

Dim query = From c In dt.AsEnumerable _
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VS 2008 Sort Datatable Column(0) Alphabetically

Dec 10, 2010

I want to sort my datatable column(0) alphabetically, but cant seem to find a way to do it. Just to give you an idea:

[Code]...

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VS 2005 Sort Data New Column Added To DataTable?

Feb 21, 2011

I am creating a datatable and then adding a column to it which is filled with data from existing column and parsed into correct format DateSold is my existing column from my datafile and I create NewDateSold by adding the column to the existing table and then parsing the information in date format.

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Dec 1, 2011

First off a great piece of code [URL] you saved me soooo much time. I am a somewhat newbee to VB2010 and was wondering how would i go about setting lets say setting column(4) to a date format so that i can get it to sort in the correct order.

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exisitng code

Dim dtrow As DataRow
Dim lat As Double = CDbl(34.213209)
Dim lon As Double = CDbl(-118.629276)

[code]....

I can I now use the function to filter records in table that are with a certain distance?

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[Code]...

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[code]....

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Imports System.Data
Imports System.Data.SqlClient
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[Code].....

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If Session("tb") Is Nothing Then
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[Code].....

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Code:
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[code].....

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Private Function ConnectMe() As DataTable
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[code]....

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[Code]...

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I have a MyObject; myObjects as List(Of MyObject) and a delegate Comparison(Of MyObject) that uses a lot of comparison functions (ByA, ByB, ByC etc) Ã la:

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[Code].....

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Sub Sort()
ReDim RollsCC(NumOfPlayers - 1)
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[Code]....

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public delegate ContactCellInfo.Guest AddGuest();
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