DataGridView save filtering after reload

Question

I have some problem with DataGridView in C#.

case is:

I do some update on database then I reload DataGridView with new values:

myDataGridView.Dat         


        

Answer 1

Ok, I found the solution, maybe it will help somebody: [btw. I made some language mistake filtering = sorting ;-)]

   DataGridViewColumn oldColumn = dataGridView1.SortedColumn;

   ListSortDirection direction;
   if (dataGridView1.SortOrder == SortOrder.Ascending) direction = ListSortDirection.Ascending;
   else direction = ListSortDirection.Descending;

   databaseUpdateFunction();

   DataGridViewColumn newColumn = dataGridView1.Columns[oldColumn.Name.ToString()];
   dataGridView1.Sort(newColumn,direction);
   newColumn.HeaderCell.SortGlyphDirection =
                    direction == ListSortDirection.Ascending ?
                    SortOrder.Ascending : SortOrder.Descending;

I used parts of code from : link text

Answer 2

This worked for me:

    //preserve existing sort column and direction
    ListSortDirection direction;
    DataGridViewColumn oldsort = MyDataGridView.SortedColumn;
    if (MyDataGridView.SortOrder == SortOrder.Ascending)
    {   direction = ListSortDirection.Ascending; } else { direction = ListSortDirection.Descending; }

    //this is refresh
    MyDataGridView.DataSource = data;

    //reapply sort and direction
    if (oldsort != null) { MyDataGridView.Sort(MyDataGridView.Columns[oldsort.Name], direction); }

Answer 3

I took kuba's solution, and put it in a utility class I can use on any DataGridView:

    private static ListSortDirection _oldSortOrder;
    private static DataGridViewColumn _oldSortCol;

    /// <summary>
    /// Saves information about sorting column, to be restored later by calling RestoreSorting
    /// on the same DataGridView
    /// </summary>
    /// <param name="grid"></param>
    public static void SaveSorting(DataGridView grid)
    {
        _oldSortOrder = grid.SortOrder == SortOrder.Ascending ?
            ListSortDirection.Ascending : ListSortDirection.Descending;
        _oldSortCol = grid.SortedColumn;
    }

    /// <summary>
    /// Restores column sorting to a datagrid. You MUST call this AFTER calling 
    /// SaveSorting on the same DataGridView
    /// </summary>
    /// <param name="grid"></param>
    public static void RestoreSorting(DataGridView grid)
    {
        if (_oldSortCol != null)
        {
            DataGridViewColumn newCol = grid.Columns[_oldSortCol.Name];
            grid.Sort(newCol, _oldSortOrder);
        }
    }

Using this looks like:

GridUtility.SaveSorting(grid);    
grid.DataSource = databaseFetch(); // or whatever
GridUtility.RestoreSorting(grid);

Answer 4

I came across Adam Nofsinger's answer before I encounterd the problem, but I used it anyway. It works wonderfull.

Just needed to add these 2 using lines to my class file:

using System.ComponentModel; 
using System.Windows.Forms;

Thanks, Geert.