Donate

WPF Datagrid Paging In VB.NET Using CollectionView Class

-
Based from the solution posted by timmyl here: How can I paginate a WPF DataGrid?. I managed to fix some bugs and added some functionalites such as MoveToFirstPage and MoveToLastPage.

Paging Class
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
Option Infer On  
 Imports System.Collections  
 Imports System.Collections.Generic  
 Imports System.ComponentModel  
 Imports System.Windows.Data  
 
 
 Public Class PageCollectionView  
   Inherits CollectionView  
   Private ReadOnly _innerList As IList  
   Private ReadOnly _itemsPerPage As Integer  
   Private _currentPage As Integer = 1  
   
 
   ' Constructor  
   Public Sub New(ByVal innerList As IList, ByVal itemsPerPage As Integer)  
     MyBase.New(innerList)  
     Me._innerList = innerList  
     Me._itemsPerPage = itemsPerPage  
   End Sub  
   
 
   Public Overrides ReadOnly Property Count() As Integer  
     Get  
       Return Me._itemsPerPage  
     End Get  
   End Property  
   
 
   Public Property CurrentPage() As Integer  
     Get  
       Return _currentPage  
     End Get  
     Set(ByVal value As Integer)  
       _currentPage = value  
       Me.OnPropertyChanged(New PropertyChangedEventArgs("CurrentPage"))  
     End Set  
   End Property
  
  
   Public ReadOnly Property ItemsPerPage() As Integer  
     Get  
       Return Me._itemsPerPage  
     End Get  
   End Property
   
  
   Public ReadOnly Property PageCount() As Integer  
     Get  
       Return (Me._innerList.Count + Me._itemsPerPage - 1) _  
           / Me._itemsPerPage  
     End Get  
   End Property  
   
 
   Private ReadOnly Property EndIndex() As Integer  
     Get  
       Dim _end = Me._currentPage * Me._itemsPerPage - 1  
       Return If(_end > Me._innerList.Count, Me._innerList.Count, _end)  
     End Get  
   End Property
 
  
   Private ReadOnly Property StartIndex() As Integer  
     Get  
       Return (Me._currentPage - 1) * Me._itemsPerPage  
     End Get  
   End Property
 
  
   Public Overrides Function GetItemAt(ByVal index As Integer) As Object  
     Dim offset = index Mod (Me._itemsPerPage)  
     If (((Me.StartIndex + offset) >= Me._innerList.Count)) Then  
       Return New Object  
     Else  
       Dim temp = Me._innerList(Me.StartIndex + offset)  
       Return Me._innerList(Me.StartIndex + offset)  
     End If  
   End Function  
 
 
   Public Sub MoveToFirstPage()  
     If Me._currentPage >= 1 Then  
       Me.CurrentPage = 1  
     End If  
     Me.Refresh()  
   End Sub  
 
 
   Public Sub MoveToPreviousPage()  
     If Me._currentPage > 1 Then  
       Me.CurrentPage -= 1  
     End If  
     Me.Refresh()  
   End Sub  
 
 
   Public Sub MoveToNextPage()  
     If Me._currentPage < Me.PageCount Then  
       Me.CurrentPage += 1  
     End If  
     Me.Refresh()  
   End Sub  
 
 
   Public Sub MoveToLastPage()  
     If Me._currentPage < Me.PageCount Then  
       Me.CurrentPage = Me.PageCount  
     End If  
     Me.Refresh()  
   End Sub  
 End Class

Screenshot:
WPF Datagrid Paging In VB.NET Using CollectionView Class
Note: I didnt include the source code for XAML declaration and the code behind since it can be converted easily.

Greg

Comments

Post a Comment

Donate

Popular Posts From This Blog

WPF CRUD Application Using DataGrid, MVVM Pattern, Entity Framework, And C#.NET

-
Image
Good day to all! Here's an example of a WPF CRUD (Create,Update and Delete) project using the DataGrid control, ADO.NET Entity Framework 6.x, C#.NET and Model–View–Viewmodel(MVVM) architectural pattern. This post was based from this tutorial WPF CRUD With DataGrid, Entity Framework And C#.NET except that we are now using the MVVM framework. The steps below are pretty straightforward and easy to follow. I. Project Setup 1. Add a table called Students in you database. The complete script is found in this post WPF CRUD With DataGrid, Entity Framework And C#.NET 2. Create a WPF Project and add four folders called DataAccess, Model, View and ViewModel. 3. Your project structure may look similar with the screenshot provided below. II. Coding The Model and Repository Class 1. Inside the Model folder, add an ADO.NET Entity Data Model that connects to the Students table in your database. On my part, I named it StudentModel . 2. For the connectionstring name in App.config file, I ...
Read more

TypeScript Error Or Bug: The term 'tsc' is not recognized as the name of a cmdlet, function, script file, or operable program.

-
Image
Good Day Gents! During this free-time I started setting up Node.js on my machine as part of my career goals which is learning new frameworks in preparation for new projects. So the first thing I did was to install TypeScript language to get myself familiar with Angular 2+. After I finished setting up TypeScript, I then created a simple HelloWorld program and ran the application through Visual Studio Code using the "tsc: build - tsconfig.json" command. I encountered an error which says "The term 'tsc' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again." Below are the details on my machine and packages installed:   - Operating System: Windows 10 Pro   - Node.js: 14.16.0   - npm version: 6.14.11   - Typescript: 4.2.3 (using command: "npm install -g typescript") After doing some research and reading th...
Read more

Invalid nested tag div found, expected closing tag input

-
Hello all, I've been experimenting on how to print html document using the said 3rd party software called iTextSharp . iTextSharp is a popular tool and has several examples on the internet regarding integration to the project and occurring issues. One of the issue I encountered is Invalid nested div tag and is expecting a closing tag input . As I trace back my html source, the tags are well-formed except that they are self closing tags such as <input>, <hr>, <img>, <br> or the like. These tags when passed to an action method as string are not properly closed and thus an issue is thrown by iTextSharp's XMLWorkerHelper's ParseXHtml() method. <img src= "~/Images/success.png" /> <input type= "hidden" name= "OrderStatusHTML" /> <input type= "submit" id= "btnSubmit" value= "Export to PDF" class= "btn btn-success" /> The solution I came up with is to fi...
Read more