如何在 C# 中为流布局面板创建自定义滚动按钮

Question

我必须为流布局面板创建向上和向下按钮垂直滚动 items.How 可以吗？我会为 POS 做这个表格。

我这样做了，但它不起作用：我有很多按钮，它们的高度为 87：我添加了代码和图片。

    private void btnScrollUp_Click(object sender, EventArgs e)
    {


        flowLayoutPanel1.VerticalScroll.Value = flowLayoutPanel1.VerticalScroll.LargeChange-1 ;
        flowLayoutPanel1.PerformLayout();



    }

    private void btnScrollDown_Click(object sender, EventArgs e)
    {


        flowLayoutPanel1.VerticalScroll.Value = flowLayoutPanel1.VerticalScroll.LargeChange+ 1;
        flowLayoutPanel1.PerformLayout();


    }

Answer 1

您想要实现什么类型的卷轴，您会使用这段代码吗？

How to Programmatically Scroll a Panel

这允许您滚动每个控件，而不是 "smooth" 滚动，但我认为这适用于您的应用程序。

Answer 2

或者您可能只想将 "AutoScroll" 设置为 false 以下代码实现正确的编程滚动：

 public Form1()
    {
        InitializeComponent();
        flowLayoutPanel1.AutoScroll = false;

    }

    public int scrollValue = 0;
    public int ScrollValue
    {
        get
        {


            return scrollValue;
        }
        set
        {
            scrollValue = value;

            if (scrollValue < flowLayoutPanel1.VerticalScroll.Minimum )
            {
                scrollValue = flowLayoutPanel1.VerticalScroll.Minimum;
            }
            if (scrollValue > flowLayoutPanel1.VerticalScroll.Maximum)
            {
                scrollValue = flowLayoutPanel1.VerticalScroll.Maximum;
            }

            flowLayoutPanel1.VerticalScroll.Value = scrollValue;
            flowLayoutPanel1.PerformLayout();

        }
    } 
    private void Add_Control(object sender, EventArgs e)
    {
        flowLayoutPanel1.Controls.Add(new Button(){Width = flowLayoutPanel1.Width, Height = 87});
    }

    private void UpClick(object sender, EventArgs e)
    {
        ScrollValue -= flowLayoutPanel1.VerticalScroll.LargeChange;

    }

    private void DownClick(object sender, EventArgs e)
    {
        ScrollValue += flowLayoutPanel1.VerticalScroll.LargeChange;
    }

如何在 C# 中为流布局面板创建自定义滚动按钮

how to create custom scroll button for flow layout panel in c#

c#

flowlayoutpanel

winforms