Change line color with gradient in a DataGridView-CodePudding

Is it possible to change the rows of a DataGridView to put a color that is not solid? Preferably a gradient?

I tried changing the RowsDefaultCellStyle property but it doesn't work, it only has the solid color option.

CodePudding user response：

You can try something like this, using the grid's "CellPainting" event

Private Sub DataGridView_CellPainting(ByVal oDataGridView As DataGridView, ByVal e As System.Windows.Forms.DataGridViewCellPaintingEventArgs)
    If e.RowIndex <> -1 Then
        Dim oLinearGradientBrush As System.Drawing.Drawing2D.LinearGradientBrush
        Dim oColor As Color = System.Drawing.Color.FromArgb(255, 204, 0)
        Dim oColorB As Color = System.Drawing.Color.FromArgb(255, 236, 159)

        oLinearGradientBrush = New System.Drawing.Drawing2D.LinearGradientBrush(e.CellBounds, oColorB, oColor, System.Drawing.Drawing2D.LinearGradientMode.Vertical)
        Dim Width As Integer = 0
        For Each col As DataGridViewColumn In oDataGridView.Columns
            If col.Visible Then
                Width = Width   col.Width
            End If
        Next
        Dim b As New System.Drawing.RectangleF(e.CellBounds.X, e.CellBounds.Y, Width, e.CellBounds.Height)
        e.Graphics.FillRectangle(oLinearGradientBrush, b)
        oLinearGradientBrush.Dispose()
        e.Paint(e.CellBounds, DataGridViewPaintParts.Border Or DataGridViewPaintParts.ContentForeground)
        e.Handled = True
    End If
End Sub

A detail, when selecting the line the code below changes the color a little to highlight it. Using gradient too. For that use the event "RowPrePaint" of the grid.

Public Sub DataGridView_RowPrePaint(ByVal oDataGridView As DataGridView, ByVal e As DataGridViewRowPrePaintEventArgs)

    If oDataGridView.Rows(e.RowIndex).Selected And oDataGridView.SelectionMode = DataGridViewSelectionMode.FullRowSelect Then
        Dim oLinearGradientBrush As System.Drawing.Drawing2D.LinearGradientBrush
        Dim oColor As Color = System.Drawing.Color.FromArgb(255, 204, 0)
        Dim oColorB As Color = System.Drawing.Color.FromArgb(255, 236, 159)

        oLinearGradientBrush = New System.Drawing.Drawing2D.LinearGradientBrush(e.RowBounds, oColorB, oColor, System.Drawing.Drawing2D.LinearGradientMode.Vertical)
        Dim Width As Integer = 0
        For Each col As DataGridViewColumn In oDataGridView.Columns
            If col.Visible Then
                Width = Width   col.Width
            End If
        Next
        Dim b As New System.Drawing.RectangleF(e.RowBounds.X, e.RowBounds.Y, Width, e.RowBounds.Height)
        e.Graphics.FillRectangle(oLinearGradientBrush, b) 'e.RowBounds)
        oLinearGradientBrush.Dispose()
        e.PaintCells(e.RowBounds, DataGridViewPaintParts.Border Or DataGridViewPaintParts.ContentForeground)
        e.Handled = True
    End If


End Sub

This example will help you in what you need, but I strongly recommend that you create a Component and define your grid inside it, it's the best way to do it.