实例介绍
【实例截图】
【核心代码】
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace TestDataGridView { public partial class ExDGV : DataGridView { public ExDGV() { InitializeComponent(); } #region 表头的属性构造 private string[] _titleHeader=new string [0]; public TopRow topRow; [Description("添加合并列表头,格式:合并列起始位置从1开始|列名称|占列个数")] public string[] TitleHeader { get { return this._titleHeader; } set { this._titleHeader=value; this.SetHeader(); } } #endregion #region TCell 单元格属性 public class TCell { private int _ColSpan; private bool _IsColSpan; private bool _isMiddle; private int _RelateIndex; private int _SpanRowWith; private string _Text; public TCell() { } public int ColSpan {//跨度(合并格数) get { return this._ColSpan; } set { this._ColSpan = value; } } public bool IsColSpan {//是否要合并 get { return this._IsColSpan; } set { this._IsColSpan = value; } } public int RelateIndex { get { return this._RelateIndex; } set { this._RelateIndex = value; } } public bool IsMiddle { get { return this._isMiddle; } set { this._isMiddle = value; } } public int SpanRowWith { get { return this._SpanRowWith; } set { this._SpanRowWith = value; } } public string Text { get { return this._Text; } set { this._Text = value; } } } #endregion #region TopRow public class TopRow { public ExDGV.TCell[] Cells; public TopRow(int colCount) { this.Cells = new TCell[colCount]; for (int i = 0; i < colCount; i ) { this.Cells[i] = new TCell(); } } } #endregion #region setHeader /// <summary> /// 设置表头属性 /// </summary> private void SetHeader() { if (this.TitleHeader != null &&TitleHeader.Length>0) { for (int i = 0; i < this.TitleHeader.GetLength(0); i ) { string[] strArray = this.TitleHeader[i].Split(new char[] { '|' }); int index = Convert.ToInt32(strArray[0]) - 1; this.topRow.Cells[index].Text = strArray[1]; this.topRow.Cells[index].ColSpan = Convert.ToInt32(strArray[2]); this.topRow.Cells[index].IsColSpan = true; for (int j = 1; j < Convert.ToInt32(strArray[2]); j ) { this.topRow.Cells[index j].Text = strArray[1]; this.topRow.Cells[index j].IsColSpan = true; if (j != (Convert.ToInt32(strArray[2]) - 1)) { this.topRow.Cells[index j].IsMiddle = true; } } this.topRow.Cells[(index Convert.ToInt32(strArray[2])) - 1].RelateIndex = index; } } base.Invalidate(); } #endregion /// <summary> /// 得到合并后列表头的宽度 /// </summary> /// <param name="idx"></param> /// <param name="self"></param> /// <returns></returns> private int GetSpanWidth(int idx,int self) { int num = 0; for (int i = idx self; i < (idx this.topRow.Cells[idx].ColSpan); i ) { num = base.Columns[i].Width; } return num; } #region 重载列数增加事件 protected override void OnColumnAdded(DataGridViewColumnEventArgs e) { this.topRow = new TopRow(base.Columns.Count); base.OnColumnAdded(e); } #endregion #region 单元格重绘事件 protected override void OnCellPainting(DataGridViewCellPaintingEventArgs e) { if (((this.TitleHeader!=null) && (e.RowIndex==-1)) && (this.TitleHeader.GetLength(0)>0)) { new Rectangle(e.CellBounds.X 1, e.CellBounds.Y 1, e.CellBounds.Width - 4, e.CellBounds.Height - 4); using (Brush brush=new SolidBrush(base.GridColor)) { using (Brush brush2=new SolidBrush(e.CellStyle.BackColor)) { using (Pen pen = new Pen(brush)) { e.Graphics.FillRectangle(brush2, e.CellBounds); e.Graphics.DrawLine(pen, e.CellBounds.Left, e.CellBounds.Bottom - 1, e.CellBounds.Right - 1, e.CellBounds.Bottom - 1); if (((e.ColumnIndex > -1) && (this.topRow != null)) && ((this.topRow.Cells[e.ColumnIndex].ColSpan > 1) || this.topRow.Cells[e.ColumnIndex].IsMiddle)) { e.Graphics.DrawLine(pen, e.CellBounds.Right - 1, e.CellBounds.Top e.ClipBounds.Height / 2, e.CellBounds.Right - 1, e.CellBounds.Bottom); } else {//画整条竖线 e.Graphics.DrawLine(pen, e.CellBounds.Right - 1, e.CellBounds.Top, e.CellBounds.Right - 1, e.CellBounds.Bottom); } int num1 = e.CellBounds.Height / 3; if ((e.ColumnIndex > -1) && this.topRow.Cells[e.ColumnIndex].IsColSpan) {//画中线 int num2 = e.CellBounds.Height / 2; e.Graphics.DrawLine(pen, e.CellBounds.Left, e.CellBounds.Bottom - (e.CellBounds.Height / 2), e.CellBounds.Right, e.CellBounds.Bottom - (e.CellBounds.Height / 2)); } if (((e.ColumnIndex > -1) && (this.topRow.Cells[e.ColumnIndex].RelateIndex > 0)) && (this.topRow.Cells[e.ColumnIndex].Text != null)) {//写合并列表头的名称 Rectangle layoutRectangle = new Rectangle((e.CellBounds.X - 1) - this.GetSpanWidth(this.topRow.Cells[e.ColumnIndex].RelateIndex, 1), e.CellBounds.Y 5, this.GetSpanWidth(this.topRow.Cells[e.ColumnIndex].RelateIndex, 0), e.CellBounds.Height / 2); StringFormat format = new StringFormat(); format.Alignment = StringAlignment.Center; e.Graphics.DrawString(this.topRow.Cells[e.ColumnIndex].Text, e.CellStyle.Font, Brushes.Crimson, layoutRectangle, format); } float y = 0f; if (e.ColumnIndex >= 0) { if (this.topRow.Cells[e.ColumnIndex].IsColSpan) { y = (e.CellBounds.Y (e.CellBounds.Height / 2)) (((e.CellBounds.Height / 2) - e.Graphics.MeasureString(e.Value.ToString(), e.CellStyle.Font).Height) / 2f); } else { y = e.CellBounds.Y ((e.CellBounds.Height - e.Graphics.MeasureString(e.Value.ToString(), e.CellStyle.Font).Height) / 2f); } if (e.Value != null) { e.Graphics.DrawString(e.Value.ToString(), e.CellStyle.Font, Brushes.Crimson, e.CellBounds.X ((e.CellBounds.Width - e.Graphics.MeasureString(e.Value.ToString(), e.CellStyle.Font).Width) / 2f), y, StringFormat.GenericDefault); } } e.Paint(e.ClipBounds, DataGridViewPaintParts.SelectionBackground | DataGridViewPaintParts.Focus | DataGridViewPaintParts.ErrorIcon | DataGridViewPaintParts.ContentBackground); e.Handled = true; } } } } base.OnCellPainting(e); } #endregion protected override void OnPaint(PaintEventArgs pe) { // TODO: 在此处添加自定义绘制代码 //pe.Graphics.TranslateTransform(, this.AutoScrollPosition.Y);//确保滚动时的相对坐标正确 // 调用基类 OnPaint base.OnPaint(pe); } } }
标签: GridView 实例 C# DataGridView
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