DevExpress-GridControl控件-GridView使用

GridControl在不同版本（目前使用14.1.8）提供了多种不同的视图，它不仅比DataGridView强大，而且在数据加载性能各方面也有了很大的提升。

在此对之前的研究做一份整理记录，以备后用。

------------------------------ 强大的分割线 ------------------------------

表格控件：GridView相当于DataGridView效果，算是GridControl最常使用到的视图。

以下分实现功能进行总结：

1. 添加CheckBox到行头处

gridView1.OptionsSelection.CheckBoxSelectorColumnWidth = 40;
gridView1.OptionsSelection.MultiSelect = true;
gridView1.OptionsSelection.MultiSelectMode = DevExpress.XtraGrid.Views.Grid.GridMultiSelectMode.CheckBoxRowSelect;
gridView1.OptionsSelection.ShowCheckBoxSelectorInColumnHeader = DevExpress.Utils.DefaultBoolean.True;

效果图：

2.合并行

gridView1.OptionsView.AllowCellMerge = true;

效果图：

3.重绘(GridView)标题CheckBox样式

private void YnGridView_CustomDrawColumnHeader(object sender, ColumnHeaderCustomDrawEventArgs e)
{
    if (e.Column != null && e.Column.Name == "DX$CheckboxSelectorColumn" && this.OptionsSelection.ShowCheckBoxSelectorInColumnHeader != DefaultBoolean.False)
    {
        bool value = (this.SelectedRowsCount == this.DataRowCount);
        RepositoryItemCheckEdit repositoryCheck = null;
        if (e.Column.RealColumnEdit == null)
        {
            repositoryCheck = new RepositoryItemCheckEdit();
        }
        else
        {
            repositoryCheck = e.Column.RealColumnEdit as RepositoryItemCheckEdit;
        }

        e.Info.InnerElements.Clear();
        e.Painter.DrawObject(e.Info);
        DrawCheckBox(repositoryCheck, e.Graphics, e.Bounds, value);
        e.Handled = true;
    }
}
protected void DrawCheckBox(RepositoryItemCheckEdit edit, Graphics g, Rectangle r, bool value)
{
    DevExpress.XtraEditors.ViewInfo.CheckEditViewInfo info;
    DevExpress.XtraEditors.Drawing.CheckEditPainter painter;
    DevExpress.XtraEditors.Drawing.ControlGraphicsInfoArgs args;
    info = edit.CreateViewInfo() as DevExpress.XtraEditors.ViewInfo.CheckEditViewInfo;
    painter = edit.CreatePainter() as DevExpress.XtraEditors.Drawing.CheckEditPainter;
    info.EditValue = value;
    info.Bounds = r;
    info.CalcViewInfo(g);
    args = new DevExpress.XtraEditors.Drawing.ControlGraphicsInfoArgs(info, new DevExpress.Utils.Drawing.GraphicsCache(g), r);
    painter.Draw(args);
    args.Cache.Dispose();
}

4.添加(GridView)无数据水印

protected override void RaiseCustomDrawEmptyForeground(CustomDrawEventArgs e)
{
    if (this.RowCount == 0 && !e.Handled)
    {
        Image img = Properties.Resources.水印_无数据;
        RectangleF actualRectF;
        int actualHeight = e.Bounds.Height - 26;
        if (e.Bounds.Width < img.Width || actualHeight < img.Height)
        {
            // 当前区域小于图片大小，进行缩放。
            float factor1 = e.Bounds.Width * 1f / img.Width;
            float factor2 = actualHeight * 1f / img.Height;
            float factor = Math.Min(factor1, factor2);
            float x = (e.Bounds.Width - img.Width * factor) / 2;
            float y = (e.Bounds.Height - img.Height * factor) + 26 / 2;
            actualRectF = new RectangleF(x, y, img.Width * factor, img.Height * factor);
        }
        else
        {
            actualRectF = new RectangleF((e.Bounds.Width - img.Width) / 2f, (actualHeight - img.Height) / 2f + 26, img.Width, img.Height);
        }
        e.Graphics.DrawImage(img, actualRectF);
        e.Handled = true;
    }
    base.RaiseCustomDrawEmptyForeground(e);
}

效果图：

5. 重绘(GridView)选中行与悬停行

private int hotTrackRow = DevExpress.XtraGrid.GridControl.InvalidRowHandle;
public int HotTrackRow
{
    get
    {
        return hotTrackRow;
    }
    set
    {
        if (hotTrackRow != value)
        {
            int prevHotTrackRow = hotTrackRow;
            hotTrackRow = value;
            if (this.ActiveEditor != null)
            {
                this.PostEditor();
            }

            this.RefreshRow(prevHotTrackRow);
            this.RefreshRow(hotTrackRow);

            if (hotTrackRow >= 0)
            {
                GridControl.Cursor = Cursors.Hand;
            }
            else
            {
                GridControl.Cursor = Cursors.Default;
            }
        }
    }
}
private void YnGridView_MouseMove(object sender, MouseEventArgs e)
{
    GridHitInfo info = this.CalcHitInfo(new Point(e.X, e.Y));

    if (info.InRowCell)
    {
        HotTrackRow = info.RowHandle;
    }
    else
    {
        HotTrackRow = DevExpress.XtraGrid.GridControl.InvalidRowHandle;
    }
}
private void YnGridView_MouseLeave(object sender, EventArgs e)
{
    HotTrackRow = DevExpress.XtraGrid.GridControl.InvalidRowHandle;
}
protected override DevExpress.Utils.AppearanceObject GetRowCellStyle(int rowHandle, GridColumn column, GridRowCellState state, AppearanceObject appearance)
{
    if (rowHandle == HotTrackRow)
    {
        appearance.BackColor = SkinManager.CurrentSkin.GridViewBorderStyle.HoverRowBackColor;
        appearance.ForeColor = SkinManager.CurrentSkin.GridViewBorderStyle.HoverRowForeColor;
    }
    else if (rowHandle == this.FocusedRowHandle || this.IsRowSelected(rowHandle))
    {
        appearance.BackColor = SkinManager.CurrentSkin.GridViewBorderStyle.SelectedRowBackColor;
        appearance.ForeColor = SkinManager.CurrentSkin.GridViewBorderStyle.HoverRowForeColor;
    }

    return base.GetRowCellStyle(rowHandle, column, state, appearance);
}

效果图：

另外还可参考：GridControl常见用法