c# datagridview代码（网上的）-白红宇

c# datagridview代码（网上的）

阅读量：5019 次

发布时间：2019-06-12

本文共 15791 字，大约阅读时间需要 52 分钟。

public partial class HeaderUnitView : DataGridView

{

private TreeView[] _columnTreeView;

private ArrayList _columnList = new ArrayList();

private int _cellHeight = 17;

public int CellHeight

{

get { return _cellHeight; }

set { _cellHeight = value; }

}

private int _columnDeep = 1;

private bool HscrollRefresh = false;

/// <summary>

/// 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

/// </summary>

[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; }

}

/// <summary>

/// 构造函数

/// </summary>

public HeaderUnitView()

{

InitializeComponent();

this.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.DisableResizing;

//设置列高度显示模式

}

[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

{

if (_columnTreeView != null)

{

for (int i = 0; i <= _columnTreeView.Length - 1; i++)

_columnTreeView[i].Dispose();

}

_columnTreeView = value;

}

[Description("设置添加的字段树的相关属性")]

public TreeView ColumnTreeViewNode

{

get { return _columnTreeView[0]; }

}

public ArrayList NadirColumnList

{

get

{

if (_columnTreeView == null)

return null;

if (_columnTreeView[0] == null)

return null;

if (_columnTreeView[0].Nodes == null)

return null;

if (_columnTreeView[0].Nodes.Count == 0)

return null;

_columnList.Clear();

GetNadirColumnNodes(_columnList, _columnTreeView[0].Nodes[0], false);

return _columnList;

}

///<summary>

///绘制合并表头

///</summary>

///<param name="node">合并表头节点</param>

///<param name="e">绘图参数集</param>

///<param name="level">结点深度</param>

///<remarks></remarks>

public void PaintUnitHeader(

TreeNode node,

System.Windows.Forms.DataGridViewCellPaintingEventArgs e,

int level)

{

//根节点时退出递归调用

if (level == 0)

return;

RectangleF uhRectangle;

int uhWidth;

SolidBrush gridBrush = new SolidBrush(this.GridColor);

SolidBrush backColorBrush = new SolidBrush(e.CellStyle.BackColor);

Pen gridLinePen = new Pen(gridBrush);

StringFormat textFormat = new StringFormat();

textFormat.Alignment = StringAlignment.Center;

uhWidth = GetUnitHeaderWidth(node);

if( node.Nodes.Count == 0)

{

uhRectangle = new Rectangle(e.CellBounds.Left,

e.CellBounds.Top + node.Level * _cellHeight,

uhWidth - 1,

_cellHeight * (_columnDeep - node.Level) - 1);

}

else

{

uhRectangle = new Rectangle(

e.CellBounds.Left,

e.CellBounds.Top + node.Level * _cellHeight,

uhWidth - 1,

_cellHeight - 1);

}

//画矩形

e.Graphics.FillRectangle(backColorBrush, uhRectangle);

//划底线

e.Graphics.DrawLine(gridLinePen

, uhRectangle.Left

, uhRectangle.Bottom

, uhRectangle.Right

, uhRectangle.Bottom);

//划右端线

e.Graphics.DrawLine(gridLinePen

, uhRectangle.Right

, uhRectangle.Top

, uhRectangle.Right

, uhRectangle.Bottom);

写字段文本

e.Graphics.DrawString(node.Text, this.Font

, new SolidBrush(e.CellStyle.ForeColor)

, uhRectangle.Left + uhRectangle.Width / 2 -

e.Graphics.MeasureString(node.Text, this.Font).Width / 2 - 1

, uhRectangle.Top +

uhRectangle.Height / 2 - e.Graphics.MeasureString(node.Text, this.Font).Height / 2);

//Image img = new Bitmap((int)uhRectangle.Width, (int)uhRectangle.Height);

//Graphics g = Graphics.FromImage(img);

//g.FillRectangle(backColorBrush, uhRectangle);

//g.DrawLine(gridLinePen

// , uhRectangle.Left

// , uhRectangle.Bottom

// , uhRectangle.Right

// , uhRectangle.Bottom);

//g.DrawLine(gridLinePen

// , uhRectangle.Right

// , uhRectangle.Top

// , uhRectangle.Right

// , uhRectangle.Bottom);

//g.DrawString(node.Text, e.CellStyle.Font, new SolidBrush(e.CellStyle.ForeColor), uhRectangle.Left + uhRectangle.Width / 2 - g.MeasureString(node.Text, this.Font).Width / 2 - 1, uhRectangle.Top +

// uhRectangle.Height / 2 - g.MeasureString(node.Text, this.Font).Height / 2, textFormat);

//this.Rows[e.RowIndex].Cells[e.ColumnIndex].ValueType = typeof(Image);

//this.Rows[e.RowIndex].Cells[e.ColumnIndex].Value = img;

递归调用()

if (node.PrevNode == null)

if (node.Parent != null)

PaintUnitHeader(node.Parent, e, level - 1);

}

/// <summary>

/// 获得合并标题字段的宽度

/// </summary>

/// <param name="node">字段节点</param>

/// <returns>字段宽度</returns>

/// <remarks></remarks>

private int GetUnitHeaderWidth(TreeNode node)

{

//获得非最底层字段的宽度

int uhWidth = 0;

//获得最底层字段的宽度

if (node.Nodes == null)

return this.Columns[GetColumnListNodeIndex(node)].Width;

if (node.Nodes.Count == 0)

return this.Columns[GetColumnListNodeIndex(node)].Width;

for (int i = 0; i <= node.Nodes.Count - 1; i++)

{

uhWidth = uhWidth + GetUnitHeaderWidth(node.Nodes[i]);

}

return uhWidth;

}

/// <summary>

/// 获得底层字段索引

/// </summary>

///' <param name="node">底层字段节点</param>

/// <returns>索引</returns>

/// <remarks></remarks>

private int GetColumnListNodeIndex(TreeNode node)

{

for (int i = 0; i <= _columnList.Count - 1; i++)

{

if (((TreeNode)_columnList[i]).Equals(node))

return i;

}

return -1;

}

/// <summary>

/// 获得底层字段集合

/// </summary>

/// <param name="alList">底层字段集合</param>

/// <param name="node">字段节点</param>

/// <param name="checked">向上搜索与否</param>

/// <remarks></remarks>

private void GetNadirColumnNodes(

ArrayList alList,

TreeNode node,

Boolean isChecked)

{

if (isChecked == false)

{

if (node.FirstNode == null)

{

alList.Add(node);

if (node.NextNode != null)

{

GetNadirColumnNodes(alList, node.NextNode, false);

return;

}

if (node.Parent != null)

{

GetNadirColumnNodes(alList, node.Parent, true);

return;

}

else

{

if (node.FirstNode != null)

{

GetNadirColumnNodes(alList, node.FirstNode, false);

return;

}

else

{

if (node.FirstNode == null)

{

return;

}

else

{

if (node.NextNode != null)

{

GetNadirColumnNodes(alList, node.NextNode, false);

return;

}

if (node.Parent != null)

{

GetNadirColumnNodes(alList, node.Parent, true);

return;

}

/// <summary>

/// 滚动

/// </summary>

/// <param name="e"></param>

protected override void OnScroll(ScrollEventArgs e)

{

bool scrollDirection = (e.ScrollOrientation == ScrollOrientation.HorizontalScroll);

base.OnScroll(e);

if (RefreshAtHscroll && scrollDirection)

this.Refresh();

}

/// <summary>

/// 列宽度改变的重写

/// </summary>

/// <param name="e"></param>

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);}

base.OnColumnWidthChanged(e);

}

/// <summary>

/// 单元格绘制(重写)

/// </summary>

/// <param name="e"></param>

/// <remarks></remarks>

protected override void OnCellPainting(System.Windows.Forms.DataGridViewCellPaintingEventArgs e)

{

try

{

//行标题不重写

if (e.ColumnIndex < 0)

{

base.OnCellPainting(e);

return;

}

if (_columnDeep == 1)

{

base.OnCellPainting(e);

return;

}

//绘制表头

if (e.RowIndex == -1)

{

if (e.ColumnIndex >= NadirColumnList.Count) { e.Handled = true; return; }

PaintUnitHeader((TreeNode)NadirColumnList[e.ColumnIndex]

, e

, _columnDeep);

e.Handled = true;

}

catch

{ }

}

网格：

public partial class RowUnitView : DataGridView

{

public RowUnitView()

{

InitializeComponent();

this.MultiSelect = true;

this.SelectionMode = DataGridViewSelectionMode.FullRowSelect;

this.AllowUserToAddRows = false;

this.RowHeadersVisible = false;

this.ReadOnly = true;

}

private int i = 1;

private int count2 = 1;

private int flag;

string selectedValue;

protected override void OnPaint(PaintEventArgs pe)

{

// TODO: 在此处添加自定义绘制代码

// 调用基类 OnPaint

base.OnPaint(pe);

}

protected override void OnCellPainting(DataGridViewCellPaintingEventArgs e)

{

try

{

DrawCell(e);

base.OnCellPainting(e);

}

catch

{ }

}

/// <summary>

/// 画单元格

/// </summary>

/// <param name="e"></param>

private void DrawCell(DataGridViewCellPaintingEventArgs e)

{

Brush gridBrush = new SolidBrush(this.GridColor);

SolidBrush backBrush = new SolidBrush(e.CellStyle.BackColor);

SolidBrush fontBrush = new SolidBrush(e.CellStyle.ForeColor);

int cellheight;

int fontheight;

int cellwidth;

int fontwidth;

int countU = 0;

int countD = 0;

int count = 0;

int totalheight = 0;

int heightU = 0;

int heightD = 0;

// 对第1,2列相同单元格进行合并

if ((e.ColumnIndex == 0 || e.ColumnIndex == 1) && e.RowIndex != -1)

{

// cellheight = e.CellBounds.Height;

// fontheight = (int)e.Graphics.MeasureString(e.Value.ToString(), e.CellStyle.Font).Height;

// cellwidth = e.CellBounds.Width;

// fontwidth = (int)e.Graphics.MeasureString(e.Value.ToString(), e.CellStyle.Font).Width;

// Pen gridLinePen = new Pen(gridBrush);

// string curValue = e.Value == null ? "" : e.Value.ToString().Trim();

// string curSelected = this.CurrentRow.Cells[0].Value == null ? "" : this.CurrentRow.Cells[0].Value.ToString().Trim();

// if (!string.IsNullOrEmpty(curValue))

// {

// for (int i = e.RowIndex; i < this.Rows.Count; i++)

// {

// if (this.Rows[i].Cells[0].Value.ToString().Equals(curValue))

// {

// this.Rows[i].Cells[0].Selected = this.Rows[e.RowIndex].Selected;

// this.Rows[i].Selected = this.Rows[e.RowIndex].Selected;

// countD++;

// heightD += this.Rows[i].Height;

// }

// else

// {

// break;

// }

// for (int i = e.RowIndex; i >= 0; i--)

// {

// if (this.Rows[i].Cells[0].Value.ToString().Equals(curValue))

// {

// this.Rows[i].Cells[0].Selected = this.Rows[e.RowIndex].Selected;

// this.Rows[i].Selected = this.Rows[e.RowIndex].Selected;

// heightU += this.Rows[i].Height;

// countU++;

// }

// else

// {

// break;

// }

// heightU = heightU - e.CellBounds.Height;

// totalheight = heightU + heightD;

// count = countD + countU -1;

// if (count < 2) { return; }

// }

// if (this.Rows[e.RowIndex].Selected)

// {

// backBrush.Color = e.CellStyle.SelectionBackColor;

// fontBrush.Color = e.CellStyle.SelectionForeColor;

// }

// e.Graphics.FillRectangle(backBrush, e.CellBounds); //new Rectangle(e.CellBounds.X,e.CellBounds.Y-(countU-1) * cellheight,cellwidth,cellheight*countU));

// //e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - fontwidth) / 2, e.CellBounds.Y - cellheight * (countU - 1) + (cellheight * count - fontheight) / 2);

// e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - fontwidth) / 2, e.CellBounds.Y - heightU + (totalheight - fontheight) / 2);

// if (countD == 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);

// e.Handled = true;

//}

//else if (e.ColumnIndex == 1 && e.RowIndex != -1)

//{

cellheight = e.CellBounds.Height;

fontheight = (int)e.Graphics.MeasureString(e.Value.ToString(), e.CellStyle.Font).Height;

cellwidth = e.CellBounds.Width;

fontwidth = (int)e.Graphics.MeasureString(e.Value.ToString(), e.CellStyle.Font).Width;

Pen gridLinePen = new Pen(gridBrush);

string curValue = this.Rows[e.RowIndex].Cells[0].Value == null ? "" : this.Rows[e.RowIndex].Cells[0].Value.ToString().Trim();

string curSelected = this.CurrentRow.Cells[0].Value == null ? "" : this.CurrentRow.Cells[0].Value.ToString().Trim();

if (!string.IsNullOrEmpty(curValue))

{

for (int i = e.RowIndex; i < this.Rows.Count; i++)

{

if (this.Rows[i].Cells[0].Value.ToString().Equals(curValue))

{

this.Rows[i].Cells[0].Selected = this.Rows[e.RowIndex].Selected;

this.Rows[i].Selected = this.Rows[e.RowIndex].Selected;

countD++;

heightD += this.Rows[i].Height;

}

else

{

break;

}

for (int i = e.RowIndex; i >= 0; i--)

{

if (this.Rows[i].Cells[0].Value.ToString().Equals(curValue))

{

this.Rows[i].Cells[0].Selected = this.Rows[e.RowIndex].Selected;

this.Rows[i].Selected = this.Rows[e.RowIndex].Selected;

heightU += this.Rows[i].Height;

countU++;

}

else

{

break;

}

heightU = heightU - e.CellBounds.Height;

totalheight = heightU + heightD;

count = countD + countU - 1;

if (count < 2) { return; }

}

if (this.Rows[e.RowIndex].Selected)

{

backBrush.Color = e.CellStyle.SelectionBackColor;

fontBrush.Color = e.CellStyle.SelectionForeColor;

}

e.Graphics.FillRectangle(backBrush, e.CellBounds); //new Rectangle(e.CellBounds.X,e.CellBounds.Y-(countU-1) * cellheight,cellwidth,cellheight*countU));

//e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - fontwidth) / 2, e.CellBounds.Y - cellheight * (countU - 1) + (cellheight * count - fontheight) / 2);

string cellvalue = e.Value.ToString();

if (fontwidth > cellwidth)

{

for (int i = cellvalue.Length-1; i > 0; i--)

{

cellvalue = cellvalue.Substring(0, i);

fontwidth = (int)e.Graphics.MeasureString(cellvalue,e.CellStyle.Font).Width;

if (fontwidth <= cellwidth) break;

}

e.Graphics.DrawString(cellvalue, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - fontwidth) / 2, e.CellBounds.Y - heightU + (totalheight - fontheight) / 2);

if (countD == 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.ColumnIndex==0)e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left , e.CellBounds.Top, e.CellBounds.Left , e.CellBounds.Bottom);

//GraphicsPath mypath = new GraphicsPath();

//StringFormat sf = new StringFormat();

//sf.Alignment = StringAlignment.Center;

//mypath.AddString((string)e.Value, e.CellStyle.Font.FontFamily, (int)FontStyle.Regular, e.CellStyle.Font.Size * count, new PointF(e.CellBounds.X + (cellwidth - fontwidth) / 2, e.CellBounds.Y - heightU + (totalheight - fontheight) / 2), sf);

//PointF[] pathpoints = mypath.PathPoints;

//byte[] pathbyte = mypath.PathTypes;

//e.Graphics.TextRenderingHint = TextRenderingHint.ClearTypeGridFit;

//e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;

//e.Graphics.FillPath(fontBrush, mypath);

e.Handled = true;

}

//else

//{

// // 对第2列相同单元格进行合并

// if (e.ColumnIndex == 1 && e.RowIndex != -1)

// {

// h = e.CellBounds.Height;

// wh = (int)e.Graphics.MeasureString(e.Value.ToString(), e.CellStyle.Font).Height;

// using (Pen gridLinePen = new Pen(gridBrush))

// {

// // 清除单元格

// e.Graphics.FillRectangle(backBrush, e.CellBounds);

// // 画 Grid 边线（仅画单元格的底边线和右边线）

// //如果本行的港口画了一条底边线，则在当前的单元格画一条底边线，并填充数据

// if (flag == 1)

// {

// e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - 1, e.CellBounds.Right - 1, e.CellBounds.Bottom - 1);

// e.Graphics.DrawString(e.Value == null ? "" : e.Value.ToString(), e.CellStyle.Font, Brushes.Black, e.CellBounds.X + 2, e.CellBounds.Y + h - (h * count2 - wh) / 2 - wh);

// count2 = 1;

// flag = 0;

// }

// else

// {

// count2 = count2 + 1;

// }

// // 画右边线

// e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1, e.CellBounds.Top, e.CellBounds.Right - 1, e.CellBounds.Bottom);

// }

// e.Handled = true;

// }

//}

}

protected override void OnSelectionChanged(EventArgs e)

{

try

{

base.OnSelectionChanged(e);

if (this.SelectedRows.Count < 1) return;

string curvalue = this.CurrentRow.Cells[0].Value.ToString();

foreach(DataGridViewRow dgvr in this.SelectedRows)

{

if (!dgvr.Cells[0].Value.ToString().Equals( curvalue))

{

dgvr.Selected = false;

}

catch { }

}

protected override void OnCellClick(DataGridViewCellEventArgs e)

{

base.OnCellClick(e);

if(e.RowIndex>-1)

this.Rows[e.RowIndex].Cells[0].Selected = true;

}

protected override void OnRowHeightChanged(DataGridViewRowEventArgs e)

{

Graphics g=Graphics.FromHwnd(this.Handle);

float fornheight = g.MeasureString(e.Row.Cells[0].Value.ToString(), e.Row.InheritedStyle.Font).Height;

if (e.Row.Height <= fornheight) e.Row.Height = (int)fornheight;

base.OnRowHeightChanged(e);

this.Refresh();

}

转载于:https://www.cnblogs.com/jinyuttt/archive/2012/03/20/2408857.html

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