DevExpress GridView 鼠标悬停颜色追踪（行或单元格）

傷城~ 2021-12-12 16:27 419阅读 0赞

如何将GridView做成类似网页的列表那样，鼠标移动的是行背景颜色跟着变，也就是所为的鼠标悬停追踪，

效果如下：

![20190712152657597.gif][]

代码如下：

public class ViewStyleHelper
        {
            bool enable;
            public bool Enable
            {
                get { return enable; }
                set
                {
                    enable = value;
                    UnRegisterEvent();
                    if (enable)
                    {
                        RegisterEvent();
                    }
                    else
                    {
                       
                        View.RefreshData();
                    }
                }
            }
            bool byRow;
            /// <summary>
            /// 真为行，假为单元格
            /// </summary>
            public bool ByRow
            {
                get { return byRow; }
                set
                {
                    byRow = value;
                    UnRegisterEvent();
                    if(enable)
                    RegisterEvent();
                }
            }
            public DevExpress.XtraGrid.Views.Grid.GridView View { get; private set; }
            /// <summary>
            /// 当前列
            /// </summary>
            GridColumn currentCol;
            /// <summary>
            /// 当前行
            /// </summary>
            int currentRowHandle;
            public ViewStyleHelper(DevExpress.XtraGrid.Views.Grid.GridView view,bool byRow=true)
            {
                View = view;
                this.byRow = byRow;
                Enable = true;
                view.MouseLeave += (s, e) =>
                {
                    currentCol = null;
                    currentRowHandle = int.MinValue;
                    view.RefreshData();
                };
            }
            void RegisterEvent()
            {
                View.MouseMove += OnMouseMove;
                if (!byRow)
                    View.RowCellStyle += OnRowCellStyle;
                else
                {
                    View.RowStyle += OnRowStyle;
                }
            }
            void UnRegisterEvent()
            {
                View.MouseMove -= OnMouseMove;
                View.RowCellStyle -= OnRowCellStyle;
                View.RowStyle -= OnRowStyle;
            }
            private void OnMouseMove(object sender, MouseEventArgs e)
            {
                var view = sender as DevExpress.XtraGrid.Views.Grid.GridView;
                var info = view.CalcHitInfo(e.Location);
                bool refresh = false;
                if ((currentCol != info.Column || currentRowHandle != info.RowHandle)&& info.InRow)
                {
                    refresh = true;
                }
                if (info.InDataRow)
                {
                    currentCol = info.Column;
                    currentRowHandle = info.RowHandle;
                }
                else
                {
                    currentCol = null;
                    currentRowHandle = int.MinValue;
                }
                if (refresh)
                    view.RefreshData();
            }
            private void OnRowStyle(object sender, DevExpress.XtraGrid.Views.Grid.RowStyleEventArgs e)
            {
                if (e.RowHandle == currentRowHandle)
                {
                    e.Appearance.BackColor = Color.FromArgb(108, 178, 235);
                    e.HighPriority = true;
                }
    
            }
            private void OnRowCellStyle(object sender, DevExpress.XtraGrid.Views.Grid.RowCellStyleEventArgs e)
            {
                if (e.Column == currentCol && e.RowHandle == currentRowHandle)
                {
                    e.Appearance.BackColor = Color.FromArgb(108, 178, 235);
                }
    
            }
        }

调用代码：

ViewStyleHelper helper;
            private void Form1_Load(object sender, EventArgs e)
            {
                 helper = new ViewStyleHelper(gridView1);
                var dt = CreateDt();
                gridControl1.DataSource = dt;
            }

[20190712152657597.gif]: /images/20211210/38fc7378298444848ae65d9a51e1cd82.png