如何在 c# 中為流布局面板創建自定義滾動按鈕

Question

我必須為流布局面板項目創建向上和向下按鈕垂直滾動。我該怎么辦？ 我將為 POS 填寫此表格。

我這樣做了，但它不起作用：我有很多按鈕，它們的高度為 87：我添加了代碼和圖片。

    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

或者，您可能只想將“AutoScroll”設置為 false，以下代碼實現了正確的編程滾動：

 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;
    }

Answer 2

你想實現什么類型的滾動，這段代碼可以嗎？

如何以編程方式滾動面板

這允許您滾動每個控件，而不是“平滑”滾動，但我認為這適用於您的應用程序。

Answer 3

        flowLayoutPanel1.HorizontalScroll.Value    += 60;
        flowLayoutPanel1.PerformLayout();