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Public Class mybuttondatagridtablestyle1 Inherits System.Windows.Forms.DataGridTextBoxColumn
#Region " Windows 窗体设计器生成的代码 "
Public Sub New() MyBase.New()
'该调用是 Windows 窗体设计器所必需的。 InitializeComponent()
'在 InitializeComponent() 调用之后添加任何初始化
End Sub
'UserControl 重写 dispose 以清理组件列表。 Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing Then If Not (components Is Nothing) Then components.Dispose() End If End If MyBase.Dispose(disposing) End Sub
'Windows 窗体设计器所必需的 Private components As System.ComponentModel.IContainer
'注意：以下过程是 Windows 窗体设计器所必需的 '可以使用 Windows 窗体设计器修改此过程。 '不要使用代码编辑器修改它。 <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() components = New System.ComponentModel.Container() End Sub
#End Region Public Delegate Sub DataGridCellButtonClickEventHandler(ByVal sender As Object, ByVal e As DataGridCellButtonClickEventArgs) Public Event CellButtonClicked As DataGridCellButtonClickEventHandler
Private m_Face As Bitmap Private m_FacePressed As Bitmap Private m_columnNum As Integer Private m_Row As Integer
Public Sub New(ByVal colNum As Integer) m_columnNum = colNum m_Row = -1
Try Dim strm As System.IO.Stream = Me.GetType().Assembly.GetManifestResourceStream("btnface.bmp") m_Face = New Bitmap(strm) strm = Me.GetType().Assembly.GetManifestResourceStream("btnpressed.bmp") m_FacePressed = New Bitmap(strm) Catch End Try End Sub
Protected Overloads Overrides Sub Edit(ByVal [source] As System.Windows.Forms.CurrencyManager, ByVal rowNum As Integer, ByVal bounds As System.Drawing.Rectangle, ByVal [readOnly] As Boolean, ByVal instantText As String, ByVal cellIsVisible As Boolean)
End Sub
Public Sub HandleMouseUp(ByVal sender As Object, ByVal e As MouseEventArgs) Dim dg As DataGrid = Me.DataGridTableStyle.DataGrid Dim hti As DataGrid.HitTestInfo = dg.HitTest(New Point(e.X, e.Y)) Dim isClickInCell As Boolean = hti.Column = Me.m_columnNum
m_Row = -1
Dim rect As New Rectangle(0, 0, 0, 0)
If isClickInCell Then rect = dg.GetCellBounds(hti.Row, hti.Column) isClickInCell = e.X > rect.Right - Me.m_Face.Width End If If isClickInCell Then Dim g As Graphics = Graphics.FromHwnd(dg.Handle) g.DrawImage(Me.m_Face, rect.Right - Me.m_Face.Width, rect.Y) g.Dispose()
RaiseEvent CellButtonClicked(Me, New DataGridCellButtonClickEventArgs(hti.Row, hti.Column))
End If End Sub
Public Sub HandleMouseDown(ByVal sender As Object, ByVal e As MouseEventArgs) Dim dg As DataGrid = Me.DataGridTableStyle.DataGrid Dim hti As DataGrid.HitTestInfo = dg.HitTest(New Point(e.X, e.Y)) Dim isClickInCell As Boolean = hti.Column = Me.m_columnNum Dim rect As New Rectangle(0, 0, 0, 0) If isClickInCell Then rect = dg.GetCellBounds(hti.Row, hti.Column) isClickInCell = e.X > rect.Right - Me.m_Face.Width End If
If isClickInCell Then
Dim g As Graphics = Graphics.FromHwnd(dg.Handle) g.DrawImage(Me.m_FacePressed, rect.Right - Me.m_FacePressed.Width, rect.Y) g.Dispose() m_Row = hti.Row End If End Sub
'重绘 Protected Overloads Overrides Sub Paint(ByVal g As System.Drawing.Graphics, ByVal bounds As System.Drawing.Rectangle, ByVal [source] As System.Windows.Forms.CurrencyManager, ByVal rowNum As Integer, ByVal backBrush As System.Drawing.Brush, ByVal foreBrush As System.Drawing.Brush, ByVal alignToRight As Boolean)
Dim parent As DataGrid = Me.DataGridTableStyle.DataGrid '如果该行是选中行 或者 当前单元格的行号=点击行的行号并且当前单元格的列号等于NEW的列号参数 Dim current As Boolean = parent.IsSelected(rowNum) Or (parent.CurrentRowIndex = rowNum And parent.CurrentCell.ColumnNumber = Me.m_columnNum)
Dim BackColor As Color If current Then BackColor = parent.SelectionBackColor Else BackColor = parent.BackColor Dim ForeColor As Color If current Then ForeColor = parent.SelectionForeColor Else ForeColor = parent.ForeColor
'请空单元格 g.FillRectangle(New SolidBrush(BackColor), bounds)
' 绘制值 Dim s As String = Me.GetColumnValueAtRow([source], rowNum).ToString() 'parent[rowNum, 0].ToString() + ((parent[rowNum, 1].ToString())+ " ").Substring(0,2); g.DrawString(s, parent.Font, New SolidBrush(ForeColor), bounds.X, bounds.Y)
Dim bm As Bitmap If m_Row = rowNum Then bm = Me.m_FacePressed Else bm = Me.m_Face g.DrawImage(bm, bounds.Right - bm.Width, bounds.Y) End Sub End Class
调用代码：
Private Function getdatagridstyle(ByVal table As DataTable) As DataGridTableStyle Dim style As New DataGridTableStyle() style.MappingName = table.TableName style.RowHeaderWidth = 15 Dim i As Integer For i = 0 To table.Columns.Count - 1 If i = 1 Then Dim textButtonColStyle As New mybuttondatagridtablestyle1(i) 'pass the column# textButtonColStyle.HeaderText = table.Columns(i).ColumnName textButtonColStyle.MappingName = table.Columns(i).ColumnName
'hookup our cellbutton handler... AddHandler textButtonColStyle.CellButtonClicked, AddressOf HandleCellButtonClick
style.GridColumnStyles.Add(textButtonColStyle)
'hook the mouse handlers AddHandler DataGrid1.MouseDown, AddressOf textButtonColStyle.HandleMouseDown AddHandler DataGrid1.MouseUp, AddressOf textButtonColStyle.HandleMouseUp Else Dim c As New DataGridTextBoxColumn() c.HeaderText = table.Columns(i).ColumnName c.MappingName = table.Columns(i).ColumnName style.GridColumnStyles.Add(c) End If Next Return style End Function Private Sub HandleCellButtonClick(ByVal sender As Object, ByVal e As DataGridCellButtonClickEventArgs) MessageBox.Show(("row " + e.RowIndex.ToString() + " col " + e.ColIndex.ToString() + " clicked.")) End Sub
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