I've been using the Infragistics UltraWinGrid for a while in a C# project, and while it's very spiffy, it is sometimes a bit heavy to run (and editing it in Visual Studio can be hazardous).

I'm looking for a lighter alternative. Looks (always a big plus with Infragistics) are not as important as functionality. Namely, I'm looking for a beefed up DataGridView which:

• has data binding (duh!)
• has lock control over editing
• allows for sub-tables on opening a row
• can have multiple headers to group columns together (say header 1 is composed of "Group A" and "Group B", and header 2 has various columns under each group)
• has sorting by column (and can sort numbers properly, even if it does not have a stock method at first)
• has filtering by column (perhaps the most demanding spec) à la UltraWinGrid/Excel (text field with a way to specify if the filter is equal, not equal, greater, lesser, starts with, ends with, etc).
• supports check box, text box or data bound list/combo box cells
• allows cells to be merged (not the control cells of course!)
• can have events bound to each row (say double click)