<DevExpress.Spreadsheet>列和行越多，画线越慢答案

【问题标题】：<DevExpress.Spreadsheet>The more columns and rows, the slower the line is drawn<DevExpress.Spreadsheet>列和行越多，画线越慢
【发布时间】：2019-05-14 08:30:30
【问题描述】：

作为参数接收并绘制一条到该尺寸的线。

列和行越多，线条绘制的越慢。有什么办法可以改善吗？

 private void Linestyle(DevExpress.Spreadsheet.Range rg1)
        {
        rg1.Borders.InsideHorizontalBorders.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Dotted;
        rg1.Borders.InsideVerticalBorders.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Dotted;
        rg1.Borders.TopBorder.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Thick;
        rg1.Borders.LeftBorder.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Thick;
        rg1.Borders.RightBorder.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Thick;
        rg1.Borders.BottomBorder.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Thick;
        rg1.Borders.InsideVerticalBorders.Color = Color.DarkOrange;
        rg1.Borders.InsideHorizontalBorders.Color = Color.DarkOrange;
        rg1.Borders.TopBorder.Color = Color.DarkOrange;
        rg1.Borders.LeftBorder.Color = Color.DarkOrange;
        rg1.Borders.RightBorder.Color = Color.DarkOrange;
        rg1.Borders.BottomBorder.Color = Color.DarkOrange;
        }

【问题讨论】：

您在 devexpress 上为此买过票吗？我想他们可以为您提供最好的帮助
你在另一台机器上试过了吗？只是在您的机器上运行缓慢？
“更多的列和行”是多少？

标签： c# winforms devexpress

【解决方案1】：

在设置边框之前使用BeginUpdate()，在设置边框之后使用EndUpdate()。像这样：

private void Linestyle(DevExpress.Spreadsheet.Range rg1)
{
    rg1.BeginUpdate();
    rg1.Borders.InsideHorizontalBorders.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Dotted;
    rg1.Borders.InsideVerticalBorders.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Dotted;
    rg1.Borders.TopBorder.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Thick;
    rg1.Borders.LeftBorder.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Thick;
    rg1.Borders.RightBorder.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Thick;
    rg1.Borders.BottomBorder.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Thick;
    rg1.Borders.InsideVerticalBorders.Color = Color.DarkOrange;
    rg1.Borders.InsideHorizontalBorders.Color = Color.DarkOrange;
    rg1.Borders.TopBorder.Color = Color.DarkOrange;
    rg1.Borders.LeftBorder.Color = Color.DarkOrange;
    rg1.Borders.RightBorder.Color = Color.DarkOrange;
    rg1.Borders.BottomBorder.Color = Color.DarkOrange;
    rg1.EndUpdate();
}

在 10x10 范围内的性能：

Without Begin/EndUpdate: ~5430ms
With Begin/EndUpdate: ~17ms

【讨论】：

【解决方案2】：

要更改单元格区域的边框，请为此区域调用Range.BeginUpdateFormatting 方法，并使用返回的Formatting 对象的Borders 属性访问和修改Borders 集合。然后调用Range.EndUpdateFormatting方法完成修改。

void SetupBorders(DevExpress.Spreadsheet.Range range) {
    Formatting rangeFormatting = range.BeginUpdateFormatting();
    Borders rangeBorders = rangeFormatting.Borders;
    rangeBorders.InsideHorizontalBorders.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Dotted;
    rangeBorders.InsideVerticalBorders.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Dotted;
    rangeBorders.TopBorder.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Thick;
    rangeBorders.LeftBorder.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Thick;
    rangeBorders.RightBorder.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Thick;
    rangeBorders.BottomBorder.LineStyle = DevExpress.Spreadsheet.BorderLineStyle.Thick;
    rangeBorders.InsideVerticalBorders.Color = Color.DarkOrange;
    rangeBorders.InsideHorizontalBorders.Color = Color.DarkOrange;
    rangeBorders.TopBorder.Color = Color.DarkOrange;
    rangeBorders.LeftBorder.Color = Color.DarkOrange;
    rangeBorders.RightBorder.Color = Color.DarkOrange;
    rangeBorders.BottomBorder.Color = Color.DarkOrange;
    range.EndUpdateFormatting(rangeFormatting);
}

详情请参阅How to: Add and Remove Cell Borders。

【讨论】：