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阻止滚动条的值更改事件处理程序,直到滚动条被释放

scrollbar winforms .net c#

3

user366312 · 技术社区 · 7 年前

假设,我需要通过移动滚动条来执行资源密集型任务。

private void hScrollBar_ValueChanged(object sender, EventArgs e)
{
    ReCalculate();
}

void ReCalculate()
{
    try
    {
        int n = hScrollBar1.Value;
        int f0 = hScrollBar2.Value;
        int theta = hScrollBar3.Value;
        int a = hScrollBar4.Value;

        //... resource-intensive task which uses scroll-bar's values.
    }
    catch
    {

    }
}

因此,我尝试使用鼠标进入和鼠标离开事件处理程序,如:

bool ready = false;
private void hScrollBars_MouseEnter(object sender, EventArgs e)
{
      ready = false;
}

private void hScrollBars_MouseLeave(object sender, EventArgs e)
{
      ready = true;
}

void ReCalculate()
{
    if(ready)
    {
        try
        {
            int n = hScrollBar1.Value;
            int f0 = hScrollBar2.Value;
            int theta = hScrollBar3.Value;
            int a = hScrollBar4.Value;

            //... resource-intensive task which uses scroll-bar's values.
        }
        catch
        {

        }
    }
}

我该怎么做?

1 回复 | 直到 7 年前

1

2

Reza Aghaei 7 年前

Scroll 事件并检查 e.Type 如果是的话 ScrollEventType.EndScroll ,运行逻辑:

private void hScrollBar1_Scroll(object sender, ScrollEventArgs e)
{
    if (e.Type == ScrollEventType.EndScroll)
    {
        // Scroll has ended
        // You can use hScrollBar1.Value
    }
}