xtragrid单元格和行选择使用Devexpress Winforms Vb.net

Question

Private Sub GridView1_RowCellStyle(sender As Object, e As 
    RowCellStyleEventArgs) Handles GridView1.RowCellStyle
    Try
        If IsDBNull(e.CellValue) Then
            e.Appearance.BackColor = Color.LightYellow
        End If
        Dim selectedCells As GridCell() = GridView1.GetSelectedCells()
        isRowSelected = GridView1.IsRowSelected(e.RowHandle)
        For Each Cells In selectedCells
            If GridView1.GetSelectedCells.Count = 1 Then
                If IsDBNull(GridView1.GetRowCellValue(Cells.RowHandle, 
                    Cells.Column)) Then
                    e.Appearance.BackColor = Color.LightYellow
                End If
            Else
                If isRowSelected Then
                    If IsDBNull(GridView1.GetRowCellValue(Cells.RowHandle, 
                        Cells.Column)) Then
                        e.Appearance.BackColor = Color.FromArgb(226, 234, 
                            253)
                    End If
                End If
            End If
        Next
    Catch ex As Exception
        MessageBox.Show(ex.Message)
    End Try
End Sub

我正在使用DevExpress .i声明'DbNull'值应该是'Lightyellow'中的默认颜色。我希望在'DbNull'值中选择行或Cell来更改蓝色。我做错了什么？ 我想要选择要更改颜色的细胞或行（也是空值）

Answer 1

It doesn't make sense to iterate through the selected cells in the RowCellStyle event handler since this event is raised only for a single cell. Eventually, it will raise for all visible cells.

Thus, the following code will be enough to complete your task:

Private Sub GridView1_RowCellStyle(ByVal sender As Object, ByVal e As RowCellStyleEventArgs)
    Dim view As GridView = TryCast(sender, GridView)
    Dim isRowSelected As Boolean = view.IsRowSelected(e.RowHandle)
    If IsDbNull(e.CellValue) AndAlso (Not isRowSelected) Then
        e.Appearance.BackColor = Color.Yellow
    End If
End Sub

Does it work for you?

Answer 2

Dim state As GridRowCellState
        state = DirectCast(e.Cell, GridCellInfo).State
        If (state And GridRowCellState.Selected) = GridRowCellState.Selected Then
            e.Appearance.BackColor = Color.FromArgb(226, 234, 253)
        End If

此代码用于选择要更改外观颜色的单元格。 GridRowCellState包含网格控件的外观自定义事件的行单元格状态.Selected Cells is指定选择当前正在处理的行/单元格。 This is My Output