Habanero.Faces.Win.GenericGridFilterControlWin.DoFilter C# (CSharp) Method

        private void DoFilter()
        {
            lock (this)
            {
                this._inFilter = true;
                this._cancelCurrentFilter = false;
                var filter = this._filterTextBox.Text.Trim().ToLower();
                if (filter == this._lastFilterText) return;
                this._lastFilterText = filter;
                if (String.IsNullOrEmpty(filter))
                {
                    this.ClearFilter();
                    this._inFilter = false;
                    return;
                }
                if (this.Grid == null)
                {
                    this._inFilter = false;
                    return;
                }
                if (this.FilterStarted != null)
                    this.FilterStarted(this, new EventArgs());
                FilterGrid(filter);
                this._inFilter = false;
                if (this.FilterCompleted != null)
                    this.FilterCompleted(this, new EventArgs());
            }
        }