DataGridView 多层列头、合并单元格
DataGridView扩展功能 多行列头、合并单元格
http://blog.sina.com.cn/s/blog_63160fa801014ity.html
public partial class ExtDataGridView : DataGridView
{
#region 变量、属性
///
/// 列头信息树
///
private TreeView _columnTreeView = null;
///
/// DataGirdView列
///
private ArrayList _columnList = new ArrayList();
///
/// 单元格高度
///
private int _cellHeight = 17;
///
/// 获取或设置单元格高度
///
public int CellHeight
{
get { return _cellHeight; }
set { _cellHeight = value; }
}
private List _mergecolumnname = new List();
///
/// 列头层数
///
private int _columnDeep = 1;
///
/// 滚动时刷新
///
private bool _hscrollRefresh = false;
///
/// 水平滚动时是否刷新表头，数据较多时可能会闪烁，不刷新时可能显示错误
///
[Description("水平滚动时是否刷新表头，数据较多时可能会闪烁，不刷新时可能显示错误")]
public bool RefreshAtHscroll
{
get { return _hscrollRefresh; }
set { _hscrollRefresh = value; }
}
[Description("设置或获得合并表头树的深度")]
public int ColumnDeep
{
get
{
if (this.Columns.Count == 0)
_columnDeep = 1;
this.ColumnHeadersHeight = _cellHeight * _columnDeep;
return _columnDeep;
}
set
{
if (value < 1)
_columnDeep = 1;
else
_columnDeep = value;
this.ColumnHeadersHeight = _cellHeight * _columnDeep;
}
}
[Description("添加合并式单元格绘制的所需要的节点对象")]
public TreeView ColumnTreeView
{
get { return _columnTreeView; }
set
{
_columnTreeView = value;
}
}
[Description("设置添加的字段树的相关属性")]
public TreeView ColumnTreeViewNode
{
get
{
if (_columnTreeView == null)
return null;
return _columnTreeView;
}
}
///
/// 设置或获取合并列的集合
///
[MergableProperty(false)]
[Editor("System.Windows.Forms.Design.ListControlStringCollectionEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))]
[DesignerSerializationVisibility(System.ComponentModel.DesignerSerializationVisibility.Visible)]
[Localizable(true)]
[Description("设置或获取合并列的集合"), Browsable(true), Category("单元格合并")]
public List MergeColumnNames
{
get
{
return _mergecolumnname;
}
set
{
_mergecolumnname = value;
}
}
///
/// 获取列头数中的实际列头
///
public ArrayList NadirColumnList
{
get
{
if (_columnTreeView == null)
return null;
//if (_columnTreeView[0] == null)
// return null;
if (_columnTreeView.Nodes == null)
return null;
if (_columnTreeView.Nodes.Count == 0)
return null;
_columnList.Clear();
GetNadirColumnNodes(_columnList, _columnTreeView.Nodes[0], false);
return _columnList;
}
}
#endregion
#region 构造函数
///
/// 创建DataGridView默认实例
///
public ExtDataGridView()
{
InitializeComponent();
this.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.DisableResizing;
//设置列高度显示模式
//表头居中对齐
base.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;
//将列填充整个DataGrid
//base.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
}
#endregion
#region 列头
///
///绘制合并表头
///
///合并表头节点
///绘图参数集
///结点深度
///
/// 获得合并标题字段的宽度
///
/// 字段节点
/// 字段宽度
///
/// 获得底层字段索引
///
///' 底层字段节点
/// 索引
///
/// 获得底层字段集合
///
/// 底层字段集合
/// 字段节点
/// 向上搜索与否
///
/// 单元格绘制(重写)
///
///
///
/// 滚动时刷新
///
///
protected override void OnScroll(ScrollEventArgs e)
{
bool scrollDirection = (e.ScrollOrientation == ScrollOrientation.HorizontalScroll);
base.OnScroll(e);
if (RefreshAtHscroll && scrollDirection)
this.Refresh();
}
///
/// 列宽度改变的重写
///
///
protected override void OnColumnWidthChanged(DataGridViewColumnEventArgs e)
{
//Graphics g = Graphics.FromHwnd(this.Handle);
//float uwh = g.MeasureString(e.Column.HeaderText, this.Font).Width;
//if (uwh >= e.Column.Width) { e.Column.Width = Convert.ToInt16(uwh); }
if (MergeColumnNames.Count > 0 ||
(_columnTreeView != null && _columnTreeView.Nodes.Count > 0))
{
this.Refresh();
}
base.OnColumnWidthChanged(e);
}
///
/// 值变更时刷新
///
///
protected override void OnCellValueChanged(DataGridViewCellEventArgs e)
{
string colName = this.Columns[e.ColumnIndex].Name;
if (this.MergeColumnNames.Contains(colName))
this.Refresh();
base.OnCellValueChanged(e);
}
#endregion
#region 合并单元格
///
/// 画单元格
///
///
private void MergeCell(DataGridViewCellPaintingEventArgs e)
{
if (e.CellStyle.Alignment == DataGridViewContentAlignment.NotSet)
{
e.CellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;
}
Brush gridBrush = new SolidBrush(this.GridColor);
SolidBrush backBrush = new SolidBrush(e.CellStyle.BackColor);
SolidBrush fontBrush = new SolidBrush(e.CellStyle.ForeColor);
int cellwidth;
//上面相同的行数
int UpRows = 0;
//下面相同的行数
int DownRows = 0;
//总行数
int count = 0;
if (this.MergeColumnNames.Contains(this.Columns[e.ColumnIndex].Name) && e.RowIndex != -1)
{
cellwidth = e.CellBounds.Width;
Pen gridLinePen = new Pen(gridBrush);
string curValue = e.Value == null ? "" : e.Value.ToString().Trim();
string curSelected = this.CurrentRow.Cells[e.ColumnIndex].Value == null ? "" : this.CurrentRow.Cells[e.ColumnIndex].Value.ToString().Trim();
if (!string.IsNullOrEmpty(curValue))
{
#region 获取下面的行数
for (int i = e.RowIndex; i < this.Rows.Count; i++)
{
if (this.Rows[i].Cells[e.ColumnIndex].Value != null && this.Rows[i].Cells[e.ColumnIndex].Value.ToString().Equals(curValue))
{
//this.Rows[i].Cells[e.ColumnIndex].Selected = this.Rows[e.RowIndex].Cells[e.ColumnIndex].Selected;
DownRows++;
if (e.RowIndex != i)
{
cellwidth = cellwidth < this.Rows[i].Cells[e.ColumnIndex].Size.Width ? cellwidth : this.Rows[i].Cells[e.ColumnIndex].Size.Width;
}
}
else
{
break;
}
}
#endregion
#region 获取上面的行数
for (int i = e.RowIndex; i >= 0; i--)
{
if (this.Rows[i].Cells[e.ColumnIndex].Value != null &&
this.Rows[i].Cells[e.ColumnIndex].Value.ToString().Equals(curValue))
{
//this.Rows[i].Cells[e.ColumnIndex].Selected = this.Rows[e.RowIndex].Cells[e.ColumnIndex].Selected;
UpRows++;
if (e.RowIndex != i)
{
cellwidth = cellwidth < this.Rows[i].Cells[e.ColumnIndex].Size.Width ? cellwidth : this.Rows[i].Cells[e.ColumnIndex].Size.Width;
}
}
else
{
break;
}
}
#endregion
count = DownRows + UpRows - 1;
if (count < 2)
{
return;
}
}
if (this.Rows[e.RowIndex].Selected)
{
backBrush.Color = e.CellStyle.SelectionBackColor;
fontBrush.Color = e.CellStyle.SelectionForeColor;
}
//以背景色填充
e.Graphics.FillRectangle(backBrush, e.CellBounds);
//画字符串
PaintingFont(e, cellwidth, UpRows, DownRows, count);
if (DownRows == 1)
{
e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - 1, e.CellBounds.Right - 1, e.CellBounds.Bottom - 1);
count = 0;
}
// 画右边线
e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1, e.CellBounds.Top, e.CellBounds.Right - 1, e.CellBounds.Bottom);
if (e.RowIndex == this.Rows.Count - 1)
e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - 1, e.CellBounds.Right - 1, e.CellBounds.Bottom - 1);
e.Handled = true;
}
}
///
/// 画字符串
///
///
///
///
///
///
private void PaintingFont(System.Windows.Forms.DataGridViewCellPaintingEventArgs e, int cellwidth, int UpRows, int DownRows, int count)
{
SolidBrush fontBrush = new SolidBrush(e.CellStyle.ForeColor);
int fontheight = (int)e.Graphics.MeasureString(e.Value == null ? string.Empty : e.Value.ToString(), e.CellStyle.Font).Height;
int fontwidth = (int)e.Graphics.MeasureString(e.Value == null ? string.Empty : e.Value.ToString(), e.CellStyle.Font).Width;
int cellheight = e.CellBounds.Height;
if (e.CellStyle.Alignment == DataGridViewContentAlignment.BottomCenter)
{
e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - fontwidth) / 2, e.CellBounds.Y + cellheight * DownRows - fontheight);
}
else if (e.CellStyle.Alignment == DataGridViewContentAlignment.BottomLeft)
{
e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X, e.CellBounds.Y + cellheight * DownRows - fontheight);
}
else if (e.CellStyle.Alignment == DataGridViewContentAlignment.BottomRight)
{
e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + cellwidth - fontwidth, e.CellBounds.Y + cellheight * DownRows - fontheight);
}
else if (e.CellStyle.Alignment == DataGridViewContentAlignment.MiddleCenter)
{
e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - fontwidth) / 2, e.CellBounds.Y - cellheight * (UpRows - 1) + (cellheight * count - fontheight) / 2);
}
else if (e.CellStyle.Alignment == DataGridViewContentAlignment.MiddleLeft)
{
e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X, e.CellBounds.Y - cellheight * (UpRows - 1) + (cellheight * count - fontheight) / 2);
}
else if (e.CellStyle.Alignment == DataGridViewContentAlignment.MiddleRight)
{
e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + cellwidth - fontwidth, e.CellBounds.Y - cellheight * (UpRows - 1) + (cellheight * count - fontheight) / 2);
}
else if (e.CellStyle.Alignment == DataGridViewContentAlignment.TopCenter)
{
e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - fontwidth) / 2, e.CellBounds.Y - cellheight * (UpRows - 1));
}
else if (e.CellStyle.Alignment == DataGridViewContentAlignment.TopLeft)
{
e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X, e.CellBounds.Y - cellheight * (UpRows - 1));
}
else if (e.CellStyle.Alignment == DataGridViewContentAlignment.TopRight)
{
e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + cellwidth - fontwidth, e.CellBounds.Y - cellheight * (UpRows - 1));
}
else
{
e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - fontwidth) / 2, e.CellBounds.Y - cellheight * (UpRows - 1) + (cellheight * count - fontheight) / 2);
}
}
#endregion
private void InitializeComponent()
{
((System.ComponentModel.ISupportInitialize)(this)).BeginInit();
this.SuspendLayout();
//
// HeaderUnitView
//
this.RowTemplate.Height = 23;
((System.ComponentModel.ISupportInitialize)(this)).EndInit();
this.ResumeLayout(false);
}
}