Datasource not reflecting sorting in DataGridView
Solution 1
First of all the DataTable
object is detached from DataGridView
even if you bind it to DataSource
, that is, if you change your DataGridView
it will not affect your DataTable
. And in your case you want the sorting in DataGridView
to be reflected in DataTable
. And so for that reason you need to catch an event every time there is changes in ordering/sorting in DataGridView
. You need to catch therefore for that regard the ColumnHeaderMouseClick
event of the DataGridView
.
Another important thing is, in achieving a synchronize sorting of both DataTable
and DataGridView
is the DefaultView
method of Datable
class that has the Sort
property. So, what we are going to do is every time the DataGridView
is changed sorting-wise we will sort the DataTable
also.
First of all we need to make a DataTable object global so that we could access it anywhere later on.
DataTable table;
Secondly, we need to initialize an event listener for ColumnHeaderMouseClick
and for our practical purpose we will set it at Form
constructor.
InitializeComponent();
dataGridView1.ColumnHeaderMouseClick += new DataGridViewCellMouseEventHandler(dataGridView1_ColumnHeaderMouseClick);
We then have this empty Mouse event handler:
void dataGridView1_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{
}
And if the above method doesn't automatically come out, just copy and paste in your code.
And for the sake of illustration we will add the DataTable
during the Form Load
and in this case I am going to use your own code:
table = new DataTable();
table.Columns.Add("Name");
table.Columns.Add("Age", typeof(int));
table.Rows.Add("Alex", 27);
table.Rows.Add("Jack", 65);
table.Rows.Add("Bill", 22);
dataGridView1.DataSource = table;
And then finally we will put some code in the ColumnHeaderMouseClick
event:
void dataGridView1_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{
if (dataGridView1.SortOrder.ToString() == "Descending") // Check if sorting is Descending
{
table.DefaultView.Sort = dataGridView1.SortedColumn.Name + " DESC"; // Get Sorted Column name and sort it in Descending order
}
else
{
table.DefaultView.Sort = dataGridView1.SortedColumn.Name + " ASC"; // Otherwise sort it in Ascending order
}
table = table.DefaultView.ToTable(); // The Sorted View converted to DataTable and then assigned to table object.
}
You could now use table object and sorted according to the sorting order of the DataGridView
.
Just to confirm my claim, we will make a button in your form named button1
and when clicked it will show the first row and the sorted column value, like:
private void button1_Click(object sender, EventArgs e)
{
String sortedValue = dataGridView1.SortedColumn.Name == "Name" : table.Rows[0][0].ToString() ? table.Rows[0][1].ToString();
MessageBox.Show(sortedValue);
}
Solution 2
You can put your DataTable
into BindingSource
container and set this class to data source of DataGridView
.
BindingSource bindingSource1 = new BindingSource();
bindingSource1.DataSource = dataTable;
dataGridView1.DataSource = bindingSource1;
// another grid view options...
To learn about BindingSort
, see this link.
Solution 3
For others coming here for same reason as I.
I couldn't get the underlying data sorted either, thus when I was deleting a row, it was deleting the wrong one.
I found DataTable
will not be sorted but only DataTable.DefaultView
will be.
So instead of DataRow row = dataTable.Rows[0];
You would do DataRow row = dataTable.DefaultView[0].Row;
Solution 4
Old question, but still no easy solution mentioned, so I post it here for the people looking for the answer nowadays:
DataRow row = ((DataRowView)yourDataGridView.SelectedRows[0].DataBoundItem).Row;
int index = yourDataTable.Rows.IndexOf(row);
index
will be the index of the row in your DataTable corresponding with the selected row in DataGridView, however you have sorted it.
Comments
-
lbrahim almost 2 years
I am binding a
DataTable
as theDataSource
of aDataGridView
. I enabled theSortMode
property toAutomatic
for allDataGridViewColumn
. But when I am sorting on DataGridView the Sort change is not being reflected in the underlying DataSource which is the DataTable.
For example:DataTable table = new DataTable(); table.Columns.Add("Name"); table.Columns.Add("Age", typeof(int)); table.Rows.Add("Alex", 27); table.Rows.Add("Jack", 65); table.Rows.Add("Bill", 22); dataGridView1.DataSource = table;
Now if I was to get the selected row like below it will always return the row at 0 Index in the DataTable even after sorting which isAlex, 27
.DataRow newRow = table.NewRow(); newRow.ItemArray = table.Rows[dataGridView1.Rows.IndexOf(dataGridView1.SelectedRows[0])].ItemArray.Clone() as object[];
Can someone please suggest how I should go about this situation?
-
lbrahim over 10 yearsSo, just wrapping my
DataTable
to aBindingSource
enables sorting fromDataGridView
to theDataTable
? What isBindingSort
btw? -
lbrahim over 10 yearsI did like you said. Still no automatic sorting on the datatable.
-
Edper over 10 years@Md.Ibrahim check my answer above.
-
ghiboz almost 10 yearsyes, but if you change the
DataGridView
sort order, theBindingSource
reflect this change...