Wpf - Convert C# ObservableCollection Sample To Dataset Or Equivalent
Feb 23, 2011
I have a C# example that is populating a multiselect combobox. This was from an example found online. It works fine with the static values coming from the observable collection. I want to change this to be database driven from a SQL Server backend, but was having issues. I did get it to populate the combobox, but the selection is acting kind of screwy. Some type of simple query from a Northwind table would suffice such as: "Select CategoryName from Categories".
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Jul 10, 2009
Function DCount(ByRef Cot As String, ByRef Bang As String, Optional ByRef DK As String
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Mar 7, 2011
Convert this solution from C# to vb.net? I'm not familiar to C#; It's a sample project that use DShow.net to capture video from webcam.[url]...
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Feb 5, 2011
i convert some code from c# sample from internet and i try to convert it to vb.net. I had some difficulties to resolve some error after conversion.
Here's the code ;
CODE:
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Aug 6, 2009
I create one column which is tinyint then I go to VS2008 and create typed dataset by wizard. Then I check that column's datatype it is now byte datatype. MS SQL 2005 tinyint = VS2008 byte ?
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Dec 21, 2011
How to Query multiple tables in a dataset to form single consolidated table without using any external database. I know this can be done using 'JOIN' in SQl.
Now my condition is I have multiple tables filled with data in a dataset and each table is interrelated with a common 'column'. For example ,
Table 1
ID
Name
1
[Code].....
Here I mentioned only two tables but in my case there are many tables. I need a generic answer for this dynamic query .
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Jan 5, 2011
This is the code from my VB6 app using CAPICOM
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but I need to convert the same functionality to VB.NET. Is there an equivalent to get the same values?
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Apr 5, 2011
I have a text document that is a roster of licensees. I am looping through this document to create a html table of this data. I've come across names with non standard characters.
This is one of them
Aimeé
I tried running all the inputs through the following function, but when it comes across the above character it doesn't replace it.
Function ReplaceBadCharacters(ByVal input As String) As String
Return input.Replace(Chr(233), "é")
End Function
How can I replace each character with the html equivalent?
EDIT
When I debug the above function it shows the input as Aime[] and not Aimeé.
In Chrome it looks like this Aime�
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Sep 28, 2009
I need to convert a Short to his binary equivalent. For example:Dim x As Short = 20480 And then I need a method to get the binary thingy, which in this case is: 101000000000000
I searched for a answer using google, but I couldn't find a proper explanaition.
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Dec 23, 2010
I want to get the total years and months in a number eg. 25 should give me 2 years 1 month. and 11 should give me 0 years 11 months and maybe 12 should be 1 year 0 months,i have this code but it does work for me as i want it seems the loop i am using goes only once.
Dim Month As Double = 25
Dim LeftMonth As Double
Dim Count As Integer = 0
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Sep 14, 2011
How do I achieve the same in VB.NET which is so easily done in SQL Server.
Select Case(GetDate() as VarBinary(8)) --Gives the Current Time in Hex
How can I create the same string in VB.NET so that I can compare in SQL Server as such -
Select Case When GetDate()=Cast(0X00009F5E00D8DF7C As DateTime) Then 'True' Else 'False' End -- 0X00009F5E00D8DF7C Will be the value I get in VB.NET When I convert it Date.Now() To Hex
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Jul 30, 2007
To convert a string to proper case what's .NET equivalent of Visual Basic strConv Function?
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Jun 25, 2010
How can i convert the following xml data to a dataset in vb.net?
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<userinfolist>
<UserInfo>
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Aug 5, 2011
My WCF service function return type is Dictionary(Of String, String). So I have to convert my Dataset to Dictionary.
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Aug 9, 2011
i am using R.Net. in that i have done some database connection using R.Net in that i am getting the result in DataFrame format i need to convert it into DataSet..[code]
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Aug 5, 2011
My WCF service function return type is Dictionary(Of String, String). So I have to convert my Dataset to Dictionary.
Here is my dataset example.
Account AccountNames
abc abc1
abc abc2
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Using LINQ or without LINQ, How can I convert Dataset To Dictionary(Of String, String)
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Jun 5, 2011
I need to convert bindiangsource.datasource (which is a list) to dataset or datatable.
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Aug 5, 2011
My WCF service function return type is Dictionary(Of String,String). So I have to convert my Dataset to Dictionary.[code]...
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Mar 11, 2012
How do you convert a DataSet to generic list.I see that in C# you can use .toList(). I'm using .net3.5 vs2008 vb?
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Mar 8, 2011
I'm using vb.net / winforms.How can I convert 10 lines with three columns into a DataSet/DataTable?
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Mar 2, 2012
I am trying to convert my EnumerableRowCollection into a DataTable, but I can't see the CopyToDataTable method. The enm.CopyToDataTable() has the blue saw tooth line under it with error saying " 'CopyToDataTable' is not a member of 'System.Data.EnumerableRowCollection' ". I have set a Reference to System.Data, System.Data.Linq, and System.Data.DataSetExtensions. I thought the CopyToDataTable method was part of the System.Data.DataSetExtensions, right? Anyone know why I can't access this method?
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Jun 28, 2009
I currently have an excel spreadsheet that has a macro that displays information from my sql server. Everything works fine with it. Im trying to embed that into my vb project though. Anyone know what the best route to go would be to do this. Should I try to convert the vba macro and display the results to a dataset?Or should I try to recreate the connection through VB to display the results? or is that sort of the same thing? Or should I try something different? [Code]
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Sep 22, 2010
I used the query designer to create a qry from a datagrid view in vb2010 express, the idea was to work out which diver logged the most minutes in the water. here is a copy of the sql syntax:
SELECT MemberID, Name, SUM(DiveTime1) AS D1, SUM(DiveTime2) AS D2, SUM(DiveTime1 + DiveTime2) AS s1
FROM Triplog
GROUP BY MemberID, Name
ORDER BY s1 DESC
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Oct 8, 2009
I'm doing an experiment on WPF and MVVM, and while coding the ViewModel on Vb.net I noticed this red wavy lines under my ObservableCollection(of T)s T_T
Anyway, the application is in WPF & VB.Net, under the .Net Framework 3.5 (I checked) and I have an 'Imports System.Collections.ObjectModel' on top of my class. Intellisense shows the other classes on System.Collections.ObjectModel except ObservableCollection.
Here's a screenshot.
So, why is ObservableCollection(of T) missing and how do I make it appear?
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Jul 8, 2009
I have a WPF app which binds a System.Collections.ObjectModel.ObservableCollection to a listbox. This ObservableCollection contains instances of my own class (named DataContractsUserObject) and at runtime when I add an object to this collection it automatically appears in the listbox because of the binding. The problem is that it always appears at the bottom of the list and I would like it to appear alphabetically sorted as the existing items in the listbox are.So I tried to sort the collection by doing this after I add an item to it:[code]but of course that is not actually sorting the original collection is it, its just sorting a new instance that is in a Generic.List format. Whilst I probably could just do that and then set that new list instance back as the source of the listbox binding, that will cause all of the items to be reloaded (and when each item in the listbox is loaded it animates in, so it would look stupid having all items animate in again just because one has been added).
The ObservableCollection class itself does not have a Sort method and although I know how to implement my own comparison class (using IComparer) I dont know how to make this work on an ObservableCollection without doign ToList or ToArray etc.[code]Just found this that looks like it might be of some use url...
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Oct 9, 2009
I'm trying out MVVM in VB.Net for a while now and started out with some of my entities using List(of T)s, which I xml serialized to disk. Now, I updated the classes used by the Lists to implement INotifyPropertyChanged so I also changed the List(of T)s to ObservableCollection(of T)s.After which, the XML serializer stopped working :'( A colleague told me that ObservableCollections, unlike generic Lists, are not serializable.If so then how can I make them Serializable?
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May 21, 2012
All I need is a simple way to sort the strings in the collection. I can't find anything online. Everybody is using lamda expressions which I don't think works for just a string collection?
Public Property FilterCollection As New ObservableCollection(Of String)
From d In FilterCollection Order By (Function(d) d)()
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Nov 7, 2011
This will probably be a basic questions for the LINQ & architecture experts however I am failing to understand a problem i've encounted when trying to update a 'Static ObservableCollection.
Me.Grid1.ItemsSource = ContactList Me.Grid2.ItemsSource = From s In ContactList Where s.ContactTypes.Any(Function(t) t.ContactTypeName = "Christmas List")
If I add a new Contact with the ContactType "Christmas List" to the ContactList ObservableCollection, Grid1 reflects the additional Contact however Grid2 does not reflect the change unless I rebind.
Anyway to Reflect the change in Grid2 to show the new Contact with the queried ContactType
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Jun 15, 2011
I'm trying to get bind a textbox text property to an observable collection, and report changes back to the collection. The ContactLog property gets set from the calling page.[code]....
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Aug 11, 2010
I have a custom item class (basically two string values with associated properties), as below:
Public Class itmDataDetails
Private _strDataName As String
Private _strDataValue As String
Public Property strDataName() As String
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Naturally, this doesn't work as x cannot be added to the ObservableCollection(Of itmDataDetails). Any suggestions on how to accomplish this? I don't know LINQ that well, so I wouldn't be surprised to discover I'm doing it wrong.
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