在DataGridView中隐藏行很慢 [英] Hiding Row in DataGridView Very Slow

问题描述

我有一个WinForms应用程序，具有约1000行（绑定）和50列的一个DataGridView。隐藏列需要整整2秒。当我想隐藏大约一半的行，这成为了问题。

I have a DataGridView in a Winforms app that has about 1000 rows (unbound) and 50 columns. Hiding a column takes a full 2 seconds. When I want to hide about half the rows, this becomes a problem.

    private void ShowRows(string match)
    {
        this.SuspendLayout();
        foreach (DataGridViewRow row in uxMainList.Rows)
        {
            if (match == row.Cells["thisColumn"].Value.ToString()))
            { row.Visible = false; }
            else
            { row.Visible = true; }
        }
        this.ResumeLayout();
    }

我通过增加 Console.WriteLine（DateTime.Now）各地的行动，而 row.Visible = FALSE 绝对是慢一点。我失去了一些东西很明显，如设置 IsReallySlow = FALSE ？还是我先走，并启用虚拟模式和code了必要的事件？

I did some testing by adding by addingConsole.WriteLine(DateTime.Now)around the actions, androw.Visible = falseis definitely the slow bit. Am I missing something obvious, like setting IsReallySlow = false? Or do I have to go ahead and enable Virtual Mode and code up the necessary events?

推荐答案

它看起来对我来说，你应该使用行过滤器代替。

It looks to me like you should be using row filters instead.

尝试使用一个数据视图作为您的绑定源，并使用DataView.RowFilter隐瞒你所选择的行或显示行。

Try using a DataView as your binding source and use DataView.RowFilter to hide rows or show rows of your choosing.

DataGridView myGridView = new DataGridView();
DataView myDataView = myTable.DefaultView;
myGridView.DataSource = myDataView; // DataView that allows row filtering

myDataView.RowFilter = string.Format("thisColumn <> '{0}'",match);  // this will hide all rows where "thisColumn" = match

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