I create a DataGridView as follows
private void IniciarGV()
{
using (var db = new Entities())
{
var ListaPantallas = (from a in db.PANTALLAS
select a).ToList();
if (ListaPantallas != null)
{
gvPermisos.DataSource = ListaPantallas;
gvPermisos.Columns["idPantalla"].Visible = false;
gvPermisos.Columns["nombrepantalla"].HeaderText = "Nombre";
//gvPermisos.Columns.Add(new DataGridViewCheckBoxColumn());
DataGridViewCheckBoxColumn checkBoxColumn = new DataGridViewCheckBoxColumn();
checkBoxColumn.HeaderText = "Seleccione";
checkBoxColumn.Width = 50;
checkBoxColumn.Name = "checkBoxColumn";
gvPermisos.Columns.Insert(0, checkBoxColumn);
//gvPermisos.EndEdit();
}
db.Dispose();
}
}
After that a i retrieve the privileges with the same method linq
var TraerPermisos = (from a in db.PERMISOS
where a.IDUSUARIO == UsuarioEditar.idUsuario
select a).ToList();
After i go through the gridview to match the privileges with the ids that i wanted to check so the user can edit them, but for some reason they always appear unmarked
so far this is what i encounter in every forum or google, but it doesnt seem to work
foreach (PERMISOS item in TraerPermisos)
{
foreach (DataGridViewRow row in gvPermisos.Rows)
{
var ValorPermisoEnGV = Convert.ToBoolean(row.Cells["checkBoxColumn"].Value);
var ValorPantalla = decimal.Parse(row.Cells["idPantalla"].Value.ToString());
if (ValorPantalla == item.IDPANTALLA)
{
row.Cells["checkBoxColumn"].Value = true;
}
}
}
this what my form looks like
I load the privileges on start
public ManejarUsuario()
{
InitializeComponent();
IniciarComboBox();
IniciarGV();
if (UsuarioEditar.idUsuario != 0)
{
CargarDatos();
btnCrearUsuario.Text = "Editar";
CargarPrivilegios();
}
}
Sorry about the long post, i've tried so many options but none seems to work
Life would be a lot easier if you just put a Boolean in the data driving the grid. First, let's make a holder class for your info
class Perms{
public int IdPantalla { get; set; }
public string NombrePantalla { get; set; }
public bool HasPermission { get; set; }
}
Then let's have the query produce a list of these instead:
//get all the IDPANTALLA this user has and put in a hash set
var TraerPermisos = (from a in db.PERMISOS
where a.IDUSUARIO == UsuarioEditar.idUsuario
select a.IDPANTALLA).ToHashSet();
//make a list of objects that includes a bool of whether the user has that permission
//note you should have this be a class level variable for ease of use later/elsewhere
ListaPantallas = (from a in db.PANTALLAS
select new Perms {
IdPantalla a.IdPantalla,
HasPermission = TraerPermisos.Contains(a.idPantalla) ,
NombrePantalla = a.nombrepantalla
}).ToList();
Then set up the grid:
gvPermisos.DataSource = ListaPantallas;
gvPermisos.Columns["IdPantalla"].Visible = false;
gvPermisos.Columns[ "NombrePantalla"].HeaderText = "Nombre";
gvPermisos.Columns[ "HadPermission"].HeaderText = "Seleccione";
The grid will find the bool property in the list and wire it up for you as a check column. It doesn't need you to make a column for it. Anything you tick is then stored in the underlying list as a true/false and you can eg foreach(var x in ListaPantallas) if(x.HasPermission...
When manipulating data in a DGV that is bound to a data source, manipulate the source. Also consider to make Perms implements INotifyPropertyChanged (and consider switching to using a binding list)
I have Ttwo Tables:
TblNum:
TblMaster:
TblMaster have Relation with TblNum with ( NumID )
I have 1 combobox, and i want to load data values to my combobox, by reading from TblMaster and showing Number from TblNum.
Actually, i use this code on load form:
private void frmOrgChartsManage_Load(object sender, EventArgs e)
{
//Load ComboBox Source from MasterTable
using (UnitOfWork db = new UnitOfWork())
{
// At first assign properties DisplayMember and ValueMember.
cmbMaster.DisplayMember = "NumID";
cmbMaster.ValueMember = "MasterID";
// And then assign DataSource property of the cmbMaster.
cmbMaster.DataSource = db.MasterRepository.Get();
}
}
with this code, i can see in my combobox (1, 2, 3, 4, 5)
Expected Result :
how i can load Number01 , Number02 , Number03 , Number04 , Number05 instead of 1, 2, 3, 4, 5 in my DisplayMember ?
EDIT:
I need get data value from TblMaster and see name from TblNum
cmbMaster.DisplayMember = "Number";
cmbMaster.ValueMember = "MasterID";
I don't know how get data from 2 tables for 1 combobox.
i find way for my problem
and write code for other guys maybe someone have this problem too
private void frmOrgChartsManage_Load(object sender, EventArgs e)
{
//Load ComboBox Source from MasterTable
using (UnitOfWork db = new UnitOfWork())
{
// At first assign properties DisplayMember and ValueMember.
cmbMaster.DisplayMember = "Number";
cmbMaster.ValueMember = "MasterID";
// And then assign DataSource property of the cmbMaster.
var result = (from master in db.MasterRepository.Get()
join number in db.tblNumRepository.Get() on master.NumID equals number.NumID
select new
{
master.MasterID,
number.Number,
}).ToList();
cmbMaster.DataSource = result;
}
}
Change the code to
private void frmOrgChartsManage_Load(object sender, EventArgs e)
{
//Load ComboBox Source from MasterTable
using (UnitOfWork db = new UnitOfWork())
{
// At first assign properties DisplayMember and ValueMember.
cmbLayerName.DisplayMember = cmbNumber.Where(x => x.NumID == "NumID").Select(y => y.Number).First();
cmbLayerName.ValueMember = "MasterID";
// And then assign DataSource property of the cmbMaster.
cmbMaster.DataSource = db.MasterRepository.Get();
cmbNumber.DataSource = db.NumberRepository.Get();
}
}
You are binding to NumID, where you need to bind to Number
I have a listbox where all my factories are loaded into. I also have a selected factories in listbox(1).
Binding Code for all factories in listbox right.
protected void fillWerke()
{
//BindingListPersistable<Liebherr.Hau.Erp.Client> bl = new BindingListPersistable<Liebherr.Hau.Erp.Client>();
AllFactory = new BindingListPersistable<Liebherr.Hau.Erp.Client>();
AllFactory = Manager.LoadClients();
BetroffeneWerkeAll.DataSource = from allF in AllFactory select allF.ClientCode;
BetroffeneWerkeAll.DataBind();
}
What I tried is,
protected void fillWerke()
{
//BindingListPersistable<Liebherr.Hau.Erp.Client> bl = new BindingListPersistable<Liebherr.Hau.Erp.Client>();
AllFactory = new BindingListPersistable<Liebherr.Hau.Erp.Client>();
AllFactory = Manager.LoadClients();
var selectedFac;
var filteredFac;
if(SelectedWerke.Items.Count > 0)
{
selectedFac = SelectedWerke.Items;
filteredFac = AllFactory.Except(selectedFac);
}
BetroffeneWerkeAll.DataSource = from allF in AllFactory select allF.ClientCode;
BetroffeneWerkeAll.DataBind();
}
however, i hope u know what i mean, sorry for my bad english
Try instead of:
BetroffeneWerkeAll.DataSource = from allF in AllFactory select allF.ClientCode;
This:
BetroffeneWerkeAll.DataSource = from allF in filteredFac select allF.ClientCode;
When you perform Except it returns the "input list except items in second list" and not sets the first list.
Not sure but it seems to me that selectedFac is of the type of ClientCode and not of an item in AllFactory. If that is the case you should use:
var result = AllFactory.Where(item =>
!selectedFac.Any(filteredValue => filteredValue == item.ClientCode)).ToList();
I have a datagridview on my form and I populate it with this:
dataGridView1.DataSource = students.Select(s => new { ID = s.StudentId, RUDE = s.RUDE, Nombre = s.Name, Apellidos = s.LastNameFather + " " + s.LastNameMother, Nacido = s.DateOfBirth })
.OrderBy(s => s.Apellidos)
.ToList();
Now, I use the s.Apellidos as the default sort, but I'd also like to allow users to sort when clicking on the column header.
This sort will not modify the data in any way, it's just a client side bonus to allow for easier searching for information when scanning the screen with their eyes.
Thanks for the suggestions.
Set all the column's (which can be sortable by users) SortMode property to Automatic
dataGridView1.DataSource = students.Select(s => new { ID = s.StudentId, RUDE = s.RUDE, Nombre = s.Name, Apellidos = s.LastNameFather + " " + s.LastNameMother, Nacido = s.DateOfBirth })
.OrderBy(s => s.Apellidos)
.ToList();
foreach(DataGridViewColumn column in dataGridView1.Columns)
{
column.SortMode = DataGridViewColumnSortMode.Automatic;
}
Edit: As your datagridview is bound with a linq query, it will not be sorted. So please go through this [404 dead link, see next section] which explains how to create a sortable binding list and to then feed it as datasource to datagridview.
Code as recovered from dead link
Link from above is 404-dead. I recovered the code from the Internet Wayback Machine archive of the page.
public Form1()
{
InitializeComponent();
SortableBindingList<person> persons = new SortableBindingList<person>();
persons.Add(new Person(1, "timvw", new DateTime(1980, 04, 30)));
persons.Add(new Person(2, "John Doe", DateTime.Now));
this.dataGridView1.AutoGenerateColumns = false;
this.ColumnId.DataPropertyName = "Id";
this.ColumnName.DataPropertyName = "Name";
this.ColumnBirthday.DataPropertyName = "Birthday";
this.dataGridView1.DataSource = persons;
}
As Niraj suggested, use a SortableBindingList. I've used this very successfully with the DataGridView.
Here's a link to the updated code I used - Presenting the SortableBindingList - Take Two - archive
Just add the two source files to your project, and you'll be in business.
Source is in SortableBindingList.zip - 404 dead link
One more way to do this is using "System.Linq.Dynamic" library. You can get this library from Nuget. No need of any custom implementations or sortable List :)
using System.Linq.Dynamic;
private bool sortAscending = false;
private void dataGridView_ColumnHeaderMouseClick ( object sender, DataGridViewCellMouseEventArgs e )
{
if ( sortAscending )
dataGridView.DataSource = list.OrderBy ( dataGridView.Columns [ e.ColumnIndex ].DataPropertyName ).ToList ( );
else
dataGridView.DataSource = list.OrderBy ( dataGridView.Columns [ e.ColumnIndex ].DataPropertyName ).Reverse ( ).ToList ( );
sortAscending = !sortAscending;
}
You don't need to create a binding datasource. If you want to apply sorting for all of your columns, here is a more generic solution of mine;
private int _previousIndex;
private bool _sortDirection;
private void gridView_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{
if (e.ColumnIndex == _previousIndex)
_sortDirection ^= true; // toggle direction
gridView.DataSource = SortData(
(List<MainGridViewModel>)gridReview.DataSource, gridReview.Columns[e.ColumnIndex].Name, _sortDirection);
_previousIndex = e.ColumnIndex;
}
public List<MainGridViewModel> SortData(List<MainGridViewModel> list, string column, bool ascending)
{
return ascending ?
list.OrderBy(_ => _.GetType().GetProperty(column).GetValue(_)).ToList() :
list.OrderByDescending(_ => _.GetType().GetProperty(column).GetValue(_)).ToList();
}
Make sure you subscribe your data grid to the event ColumnHeaderMouseClick. When the user clicks on the column it will sort by descending. If the same column header is clicked again, sorting will be applied by ascending.
your data grid needs to be bound to a sortable list in the first place.
Create this event handler:
void MakeColumnsSortable_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
{
//Add this as an event on DataBindingComplete
DataGridView dataGridView = sender as DataGridView;
if (dataGridView == null)
{
var ex = new InvalidOperationException("This event is for a DataGridView type senders only.");
ex.Data.Add("Sender type", sender.GetType().Name);
throw ex;
}
foreach (DataGridViewColumn column in dataGridView.Columns)
column.SortMode = DataGridViewColumnSortMode.Automatic;
}
And initialize the event of each of your datragrids like this:
dataGridView1.DataBindingComplete += MakeColumnsSortable_DataBindingComplete;
You can use DataGridViewColoumnHeaderMouseClick event like this :
Private string order = String.Empty;
private void dgvDepartment_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{
if (order == "d")
{
order = "a";
dataGridView1.DataSource = students.Select(s => new { ID = s.StudentId, RUDE = s.RUDE, Nombre = s.Name, Apellidos = s.LastNameFather + " " + s.LastNameMother, Nacido = s.DateOfBirth }) .OrderBy(s => s.Apellidos).ToList();
}
else
{
order = "d";
dataGridView1.DataSource = students.Select(s => new { ID = s.StudentId, RUDE = s.RUDE, Nombre = s.Name, Apellidos = s.LastNameFather + " " + s.LastNameMother, Nacido = s.DateOfBirth }.OrderByDescending(s => s.Apellidos) .ToList()
}
}
there is quite simply solution when using Entity Framework (version 6 in this case). I'm not sure but it seems to ObservableCollectionExtensions.ToBindingList<T> method returns implementation of sortable binding list. I haven't found source code to confirm this supposition but object returning from this method works with DataGridView very well especially when sorting columns by clicking on its headers.
The code is very simply and relies only on .net and entity framework classes:
using System.Data.Entity;
IEnumerable<Item> items = MethodCreatingItems();
var observableItems = new System.Collections.ObjectModel.ObservableCollection<Item>(items);
System.ComponentModel.BindingList<Item> source = observableItems.ToBindingList();
MyDataGridView.DataSource = source;
put this line in your windows form (on load or better in a public method like "binddata" ):
//
// bind the data and make the grid sortable
//
this.datagridview1.MakeSortable( myenumerablecollection );
Put this code in a file called DataGridViewExtensions.cs (or similar)
// MakeSortable extension.
// this will make any enumerable collection sortable on a datagrid view.
//
// BEGIN MAKESORTABLE - Mark A. Lloyd
//
// Enables sort on all cols of a DatagridView
//
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
public static class DataGridViewExtensions
{
public static void MakeSortable<T>(
this DataGridView dataGridView,
IEnumerable<T> dataSource,
SortOrder defaultSort = SortOrder.Ascending,
SortOrder initialSort = SortOrder.None)
{
var sortProviderDictionary = new Dictionary<int, Func<SortOrder, IEnumerable<T>>>();
var previousSortOrderDictionary = new Dictionary<int, SortOrder>();
var itemType = typeof(T);
dataGridView.DataSource = dataSource;
foreach (DataGridViewColumn c in dataGridView.Columns)
{
object Provider(T info) => itemType.GetProperty(c.Name)?.GetValue(info);
sortProviderDictionary[c.Index] = so => so != defaultSort ?
dataSource.OrderByDescending<T, object>(Provider) :
dataSource.OrderBy<T,object>(Provider);
previousSortOrderDictionary[c.Index] = initialSort;
}
async Task DoSort(int index)
{
switch (previousSortOrderDictionary[index])
{
case SortOrder.Ascending:
previousSortOrderDictionary[index] = SortOrder.Descending;
break;
case SortOrder.None:
case SortOrder.Descending:
previousSortOrderDictionary[index] = SortOrder.Ascending;
break;
default:
throw new ArgumentOutOfRangeException();
}
IEnumerable<T> sorted = null;
dataGridView.Cursor = Cursors.WaitCursor;
dataGridView.Enabled = false;
await Task.Run(() => sorted = sortProviderDictionary[index](previousSortOrderDictionary[index]).ToList());
dataGridView.DataSource = sorted;
dataGridView.Enabled = true;
dataGridView.Cursor = Cursors.Default;
}
dataGridView.ColumnHeaderMouseClick+= (object sender, DataGridViewCellMouseEventArgs e) => DoSort(index: e.ColumnIndex);
}
}
KISS : Keep it simple, stupid
Way A:
Implement an own SortableBindingList class when like to use DataBinding and sorting.
Way B:
Use a List<string> sorting works also but does not work with DataBinding.
I suggest using a DataTable.DefaultView as a DataSource. Then the line below.
foreach (DataGridViewColumn column in gridview.Columns)
{
column.SortMode = DataGridViewColumnSortMode.Automatic;
}
After that the gridview itself will manage sorting(Ascending or Descending is supported.)
If you get an error message like
An unhandled exception of type 'System.NullReferenceException'
occurred in System.Windows.Forms.dll
if you work with SortableBindingList, your code probably uses some loops over DataGridView rows and also try to access the empty last row! (BindingSource = null)
If you don't need to allow the user to add new rows directly in the DataGridView this line of code easily solve the issue:
InitializeComponent();
m_dataGridView.AllowUserToAddRows = false; // after components initialized
...
Create a class which contains all properties you need, and populate them in the constructor
class Student
{
int _StudentId;
public int StudentId {get;}
string _Name;
public string Name {get;}
...
public Student(int studentId, string name ...)
{ _StudentId = studentId; _Name = name; ... }
}
Create an IComparer < Student > class, to be able to sort
class StudentSorter : IComparer<Student>
{
public enum SField {StudentId, Name ... }
SField _sField; SortOrder _sortOrder;
public StudentSorder(SField field, SortOrder order)
{ _sField = field; _sortOrder = order;}
public int Compare(Student x, Student y)
{
if (_SortOrder == SortOrder.Descending)
{
Student tmp = x;
x = y;
y = tmp;
}
if (x == null || y == null)
return 0;
int result = 0;
switch (_sField)
{
case SField.StudentId:
result = x.StudentId.CompareTo(y.StudentId);
break;
case SField.Name:
result = x.Name.CompareTo(y.Name);
break;
...
}
return result;
}
}
Within the form containing the datagrid add
ListDictionary sortOrderLD = new ListDictionary(); //if less than 10 columns
private SortOrder SetOrderDirection(string column)
{
if (sortOrderLD.Contains(column))
{
sortOrderLD[column] = (SortOrder)sortOrderLD[column] == SortOrder.Ascending ? SortOrder.Descending : SortOrder.Ascending;
}
else
{
sortOrderLD.Add(column, SortOrder.Ascending);
}
return (SortOrder)sortOrderLD[column];
}
Within datagridview_ColumnHeaderMouseClick event handler do something like this
private void dgv_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{
StudentSorter sorter = null;
string column = dGV.Columns[e.ColumnIndex].DataPropertyName; //Use column name if you set it
if (column == "StudentId")
{
sorter = new StudentSorter(StudentSorter.SField.StudentId, SetOrderDirection(column));
}
else if (column == "Name")
{
sorter = new StudentSorter(StudentSorter.SField.Name, SetOrderDirection(column));
}
...
List<Student> lstFD = datagridview.DataSource as List<Student>;
lstFD.Sort(sorter);
datagridview.DataSource = lstFD;
datagridview.Refresh();
}
Hope this helps
Just in case somebody still looks for it, I did it on VS 2008 C#.
On the Event ColumnHeaderMouseClick, add a databinding for the gridview, and send the order by field like a parameter. You can get the clicked field as follows:
dgView.Columns[e.ColumnIndex].Name
In my case the header's names are similar to view field names.
I have a BindingList<> object bind as a data source to dataGridView.
BindingList x1;
x1 = new BindingList<sourceObject>();
BindingSource bsx1 = new BindingSource();
bsx1.DataSource = x1;
dataGridView1.DataSource = bsx1;
When I clicked the column header, no sorting takes place.
I used the SortableBindingList answer provided by Tom Bushell.
Having included two source files into my project
SortableBindingList.cs
PropertyComparer.cs
Then this change is made to my code:
Be.Timvw.Framework.ComponentModel.SortableBindingList x1; // 1
x1 = new Be.Timvw.Framework.ComponentModel.SortableBindingList<sourceObject>(); // 2
BindingSource bsx1 = new BindingSource();
bsx1.DataSource = x1;
dataGridView1.DataSource = bsx1;
After these changes I performed a build on my program. I am now able to sort by clicking the column headers. Only two lines need changing, they are highlighted in the code snippet above by trailing comments.
In my case, the problem was that I had set my DataSource as an object, which is why it didn't get sorted. After changing from object to a DataTable it workd well without any code complement.
If using a DataTable: dgv.DataSource = (DataTable)table
You can automatically enable Sorting for objects that contain the IComparable Interface. After creating the DataTable, when adding the columns be sure to set the type also to at least object:
table.Columns.Add("ColumnName", typeof(object))
Otherwise, if you do Not specifically give it a type, it converts the object to a string.
I spent a fair amount of time creating a dgv_ColumnHeaderMouseClick() event because it was Not sorting the DataGridView correctly, then to find that all you need to do is specify the type for the column name, and it sorts properly. And the reason it was not sorting correctly previously was because without specifying the type for DataTable columns, it will convert objects to strings.
Just instead of passing a list to the datagrid, you store the search result as a datatable.
dataGridView1.DataSource = students
.Select(s => new {
ID = s.StudentId,
RUDE = s.RUDE,
Nombre = s.Name,
Apellidos = s.LastNameFather + " " + s.LastNameMother,
Nacido = s.DateOfBirth })
.OrderBy(s => s.Apellidos)
.ToDataTable();