DevExpress中GridView列头打开隐藏分组和拖动分组

   
                //打开和隐藏列分组
                var gridView_custom = gridView1;
                #region 双击收缩
                Dictionary<string, List<GridColumn>> cacheDictColumns = new Dictionary<string, List<GridColumn>>();
                DateTime t1, t2 = DateTime.MinValue;
                gridView_custom.MouseDown += (sender, e) =>
                {
                    var sd = sender as DevExpress.XtraGrid.Views.Grid.GridView;
                    if (sd == null)
                    {
                        return;
                    }
                    if (e.Button == MouseButtons.Left)
                    {
                        t1 = DateTime.Now;
                        if (Math.Abs((t1 - t2).TotalMilliseconds) > 500)
                        {
                            t2 = DateTime.Now;
                            return;
                        }
                        var calcHitInfo = sd.CalcHitInfo(e.X, e.Y);
                        if (!calcHitInfo.InColumnPanel)
                        {
                            return;
                        }
                        if (calcHitInfo.Column.Caption.Contains("+") || calcHitInfo.Column.Caption.Contains("-"))
                        {
                            var rowIndex = 0;
                            var vsList = sd.Columns.Where(x => x.Visible).OrderBy(x => x.VisibleIndex).ToList();
                            if (calcHitInfo.Column.Caption.Contains("-"))
                            {
                                calcHitInfo.Column.Caption = calcHitInfo.Column.Caption.Replace('-', '+');
                                foreach (GridColumn gridColumn in vsList)
                                {
                                    if (gridColumn.Name == calcHitInfo.Column.Name)
                                    {
                                        rowIndex++;
                                        continue;
                                    }
                                    if (rowIndex == 0)
                                    {
                                        continue;
                                    }
                                    if (rowIndex > 1)
                                    {
                                        if (gridColumn.Caption.Contains("+") || gridColumn.Caption.Contains("-"))
                                        {
                                            break;
                                        }
                                        gridColumn.Visible = false;
                                        cacheDictColumns[calcHitInfo.Column.Name].Add(gridColumn);
                                    }
                                    else
                                    {
                                        gridColumn.Visible = false;
                                        cacheDictColumns[calcHitInfo.Column.Name] = new List<GridColumn>() { gridColumn };
                                    }
                                    rowIndex++;
                                }
                                return;
                            }
                            if (calcHitInfo.Column.Caption.Contains("+"))
                            {
                                calcHitInfo.Column.Caption = calcHitInfo.Column.Caption.Replace('+', '-');
                                if (cacheDictColumns.ContainsKey(calcHitInfo.Column.Name))
                                {
                                    foreach (GridColumn gridColumn in vsList)
                                    {
                                        if (gridColumn.Name == calcHitInfo.Column.Name)
                                        {
                                            rowIndex = calcHitInfo.Column.VisibleIndex;
                                            break;
                                        }
                                    }
                                    for (int rrrIndex = 0; rrrIndex < cacheDictColumns[calcHitInfo.Column.Name].Count; 

rrrIndex++)
                                    {
                                        rowIndex++;
                                        cacheDictColumns[calcHitInfo.Column.Name][rrrIndex].VisibleIndex = rowIndex;
                                        cacheDictColumns[calcHitInfo.Column.Name][rrrIndex].Visible = true;
                                    }
                                    cacheDictColumns.Remove(calcHitInfo.Column.Name);
                                }
                                return;
                            }
                        }
                    }
                };
            #endregion

            #region 左右移动
            List<GridColumn> cacheStartList = new List<GridColumn>();
            gridView_custom.DragObjectStart += (sender, e) =>
            {
                var sd = sender as DevExpress.XtraGrid.Views.Grid.GridView;
                if (sd == null)
                {
                    return;
                }
                cacheStartList.Clear();
                var vList = sd.Columns.Where(x => x.Visible).OrderBy(x => x.VisibleIndex).ToList();
                if (vList.Count == 0)
                {
                    return;
                }
                cacheStartList.AddRange(vList);
            };
            gridView_custom.DragObjectDrop += (sender, e) =>
            {
                var sd = sender as DevExpress.XtraGrid.Views.Grid.GridView;
                if (sd == null)
                {
                    return;
                }
                var dragObject = e.DragObject as GridColumn;
                if (dragObject == null)
                {
                    return;
                }
                if (dragObject.Caption.Contains("+") || dragObject.Caption.Contains("-"))
                {
                    var oldIndexValue = -1;
                    var groupList = new List<GridColumn>();
                    var oldIndexList = new List<int>();
                    for (int rrrIndex = 0; rrrIndex < cacheStartList.Count; rrrIndex++)
                    {
                        if (cacheStartList[rrrIndex].Name == dragObject.Name)
                        {
                            oldIndexList.Add(rrrIndex);
                            oldIndexValue = rrrIndex;
                            groupList.Add(cacheStartList[rrrIndex]);
                            if (cacheStartList[rrrIndex].Caption.Contains("+"))
                            {
                                break;
                            }
                            continue;
                        }
                        if (oldIndexValue != -1)
                        {
                            if (cacheStartList[rrrIndex].Caption.Contains("+") || cacheStartList[rrrIndex].Caption.Contains

("-"))
                            {
                                break;
                            }
                            oldIndexList.Add(rrrIndex);
                            groupList.Add(cacheStartList[rrrIndex]);
                        }
                    }
                    var inIndex = -1;
                    var nameIndex = string.Empty;
                    if (oldIndexValue < dragObject.VisibleIndex)
                    {
                        for (int rrrIndex = 0; rrrIndex < cacheStartList.Count; rrrIndex++)
                        {
                            if (dragObject.VisibleIndex < rrrIndex)
                            {
                                if (cacheStartList[rrrIndex].Caption.Contains("+") || cacheStartList

[rrrIndex].Caption.Contains("-"))
                                {
                                    inIndex = rrrIndex;
                                    nameIndex = cacheStartList[rrrIndex].Name;
                                    break;
                                }
                            }
                        }
                        if (inIndex == -1)
                        {
                            inIndex = cacheStartList.Count;
                        }
                    }
                    else
                    {
                        for (int rrrIndex = 0; rrrIndex < cacheStartList.Count; rrrIndex++)
                        {
                            if (dragObject.VisibleIndex >= rrrIndex)
                            {
                                if (cacheStartList[rrrIndex].Caption.Contains("+") || cacheStartList

[rrrIndex].Caption.Contains("-"))
                                {
                                    inIndex = rrrIndex;
                                    nameIndex = cacheStartList[rrrIndex].Name;
                                }
                            }
                            else
                            {
                                if (inIndex != -1)
                                {
                                    if (cacheStartList[rrrIndex].Caption.Contains("+") || cacheStartList

[rrrIndex].Caption.Contains("-"))
                                    {
                                        break;
                                    }
                                }
                                else
                                {
                                    if (cacheStartList[rrrIndex].Caption.Contains("+") || cacheStartList

[rrrIndex].Caption.Contains("-"))
                                    {
                                        inIndex = rrrIndex;
                                        nameIndex = cacheStartList[rrrIndex].Name;
                                    }
                                }
                            }
                        }
                    }
                    if (inIndex < 0)
                    {
                        throw new Exception("未识别····");
                    }
                    if (oldIndexList.Count(x => x == inIndex) > 0)
                    {
                        for (int rrrIndex = 0; rrrIndex < cacheStartList.Count; rrrIndex++)
                        {
                            cacheStartList[rrrIndex].VisibleIndex = rrrIndex;
                        }
                        return;
                    }
                    for (int rrrIndex = cacheStartList.Count - 1; rrrIndex >= 0; rrrIndex--)
                    {
                        if (groupList.Any(x => x.Name == cacheStartList[rrrIndex].Name))
                        {
                            cacheStartList.RemoveAt(rrrIndex);
                        }
                    }
                    if (string.IsNullOrEmpty(nameIndex))
                    {
                        cacheStartList.AddRange(groupList);
                    }
                    else
                    {
                        for (int rrrIndex = 0; rrrIndex < cacheStartList.Count; rrrIndex++)
                        {
                            if (cacheStartList[rrrIndex].Name == nameIndex)
                            {
                                cacheStartList.InsertRange(rrrIndex, groupList);
                                break;
                            }
                        }
                    }
                    for (int rrrIndex = 0; rrrIndex < cacheStartList.Count; rrrIndex++)
                    {
                        cacheStartList[rrrIndex].VisibleIndex = rrrIndex;
                    }
                }
            };
            #endregion