如何提高DataGridView的绘制性能? [英] How to improve painting performance of DataGridView?

问题描述

(抱歉英语不好)

当 DataGridView 重新绘制时，它的性能有一个大问题.

I have a big problem with performance of DataGridView when it re-paints.

我正在使用 DataGridView 来显示来自外部应用程序流的日志.来自流的消息以高频率(小于 1 毫秒)传入.如果我在每条新消息到来时立即向 DataGridView 添加新行，DataGridView 就没有时间在下一条消息到来之前重新绘制自己.

I'm using a DataGridView to show logs from an external application stream. Messages from the stream come in with a high frequency (less than 1 ms). If I add new row to the DataGridView immediately when each new message comes, the DataGridView doesn't have time to re-paint itself before the next message comes.

一种可能的解决方案是使用队列来收集消息并每 100 毫秒使用队列中的消息重新绘制 DataGridView.这很好，但是 DataGridView 在自动滚动到最后一行时会闪烁.(禁用平滑滚动)

A possible solution is to use a queue to collect messages and re-paint DataGridView every 100 ms with messages from queue. This is good but the DataGridView blinks when it auto-scrolls to the last row. (Smooth scroll is disabled)

你能帮我提高 DataGridView 的性能吗?

Can you help me to improve DataGridView performance?

推荐答案

我最近在使用 DataGridView 时遇到了一些缓慢的问题，解决方案是以下代码

I recently had some slowness issues with DataGridView and the solution was the following code

public static void DoubleBuffered(this DataGridView dgv, bool setting)
{
    Type dgvType = dgv.GetType();
    PropertyInfo pi = dgvType.GetProperty("DoubleBuffered",
          BindingFlags.Instance | BindingFlags.NonPublic);
    pi.SetValue(dgv, setting, null);
}

它为 DataGridView 对象开启双缓冲.只需在您的 DGV 上调用 DoubleBuffered().希望有帮助.

It turns double buffering on for DataGridView objects. Just call DoubleBuffered() on your DGV. Hope it helps.

我可能已经把它弄掉了，但我现在无法搜索原件，所以这只是为了强调代码不是我的.

I might've gotten this off SO, but I can't search for the original right now so this is just to emphasize that the code isn't mine.

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