how to select all rows in DataGridView on pressing a button ?
i work on C# winforms
DataGridView.SelectAll Method
as easy as calling SelectAll :)
make sure the property multiselect is set to true 
dataGridView.SelectAll()
this selects all the DatagridView including the ColumnHeaders . But if you want that the ColumnHeaders will not be included
dataGridView.ColumnHeaders.Visible = false;
 dataGridView.SelectAll();
 dataGridView.ColumnHeaders.Visible = true;
Please vote :) Thanks a lot...
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