VB.NET中关于DataGrid颜色的自定义

近来项目用到了一个类似WEB控件DataGrid中自定义行或列的颜色的功能，然而应用却是在WIN的窗体下，实现起来无法使用类似JavaScript的脚本注册的功能来动态完成，十分着急，察看了CSDN的一些关于WinForm下的关于DataGrid的资料，看到这样的一篇介绍DG结构的美文，题目是《Henry手记:WinForm Datagrid结构剖析》，作者是韩睿（Latitude），其中介绍了WIN DG的颜色的定义，但是主要是针对每一个Cell的。

我们需要的则是标记某一行的数据，用颜色突出显示，所以作了部分改动，现在把部分代码张贴出来供大家参考：

1． 基础类出自韩睿：

Public Class DataGridColoredTextBoxColumn

Inherits DataGridTextBoxColumn


Public rowcollection As New Collection()


Public BackColor() As Color

Public ForeColor() As Color

Private Function GetText(ByVal Value As Object) As String

If TypeOf (Value) Is System.DBNull Then

Return NullText

ElseIf Value Is Nothing Then

Return ""

Else

Return Value.ToString 软件开发网 www.mscto.com

End If

End Function


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 text As String

text = GetText(GetColumnValueAtRow(source, rowNum))

backBrush = New SolidBrush(TextBox.BackColor)

foreBrush = New SolidBrush(TextBox.ForeColor)

ReDim Preserve BackColor(rowcollection.Count)

ReDim Preserve ForeColor(rowcollection.Count)


Dim i As Integer = 1

Do While (i <= rowcollection.Count)

If rowNum = Val(rowcollection.Item(i)) Then

If Not BackColor(i - 1).IsEmpty Then

backBrush = New SolidBrush(BackColor(i - 1))

End If

If Not ForeColor(i - 1).IsEmpty Then

foreBrush = New SolidBrush(ForeColor(i - 1))

End If

End If

i += 1

Loop


MyBase.PaintText(g, bounds, text, backBrush, foreBrush, alignToRight)

End Sub

End Class


2.关于行颜色定义的类：

Imports System.Windows.Forms

Namespace Truck_WEB

Public Class DrawDGClass


Public Class ReDrawDataDridControls : Inherits DataGridColoredTextBoxColumn

Public Sub DrawCorol(ByRef DG As DataGrid, Optional ByVal CurrentRowindex As Integer = 0)

"设置选中的行的颜色，默认是第一行选中。

Dim dt As DataTable

Dim ts As New DataGridTableStyle()

ts.AllowSorting = False

Dim aColumnTextColumn As DataGridColoredTextBoxColumn

dt = CType(DG.DataSource, DataTable)

ts.MappingName = CType(DG.DataSource, DataTable).TableName

DG.TableStyles.Clear()

Dim numCols As Integer

numCols = dt.Columns.Count

Dim i, j As Integer

i = 0

j = 0


Do While (i < numCols)

aColumnTextColumn = New DataGridColoredTextBoxColumn()

Dim rowindex As Integer = 0


For rowindex = 0 To dt.Rows.Count - 1

Dim StrSel As String

Dim MyForeCorol, MyBackCorol As Color

aColumnTextColumn.rowcollection.Add(rowindex)

If rowindex = CurrentRowindex Then

MyForeCorol = Color.White

MyBackCorol = Color.DarkSlateBlue

else


MyForeCorol = Color.DarkSlateBlue

MyBackCorol = Color.White

End If


ReDim Preserve aColumnTextColumn.ForeColor(aColumnTextColumn.rowcollection.Count)

ReDim Preserve aColumnTextColumn.BackColor(aColumnTextColumn.rowcollection.Count)

aColumnTextColumn.ForeColor(rowindex) = MyForeCorol

aColumnTextColumn.BackColor(rowindex) = MyBackCorol

Next


要更改列头名，请改下句的HeaderText值

aColumnTextColumn.HeaderText = dt.Columns(i).ColumnName

aColumnTextColumn.MappingName = dt.Columns(i).ColumnName

ts.GridColumnStyles.Add(aColumnTextColumn)

i = (i + 1)

Loop

DG.TableStyles.Add(ts)

End Sub

End Class

End Class

End Namespace

以上是设定选中单行的颜色为反色，各位还可以借题发挥一下！例如设置颜色，等等。