The user control throws an event.

// Public Delegate void datagridnewcolumneventhandler (Object sender, datagridnewcolumneventargs E) is added to the grid );
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// Add the data column event parameter public class maid: eventargs {private gridcontrol fgridcontrol; private gridview fgridview; Public MAID: Base () {This. fgridcontrol = mongodcontrol; this. fgridview = login dview;} public gridcontrol {get {return fgridcontrol;} public gridview {get {return fgridview ;}}} ========================================================== ============
[Category ("data"), description ("events for adding data columns to the grid")] public event datagridnewcolumneventhandler datagridnewcolumn;
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// Add a new column datatablenewcolumn ();
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Private void datatablenewcolumn () {datagridnewcolumneventargs veventargs; If (datagridnewcolumn! = NULL) {veventargs = new maid (this. gridcontrol1, this. gridview1); maid (this, veventargs );}}