c# - 用户在运行时调整 TableLayoutPanel 中的行和列的大小

Question

我正在开发一个 WinForm 项目并“尝试”创建一个 TableLayoutPanel，用户可以像 SplitContainer 的行为一样在运行时调整它的大小。我发现了一些代码可以部分地做到这一点，但它是不完整的。有人可以帮我解决这个问题吗？

提前致谢， -DA

这是我目前拥有的代码，来 self 在 CodeProject 上找到的一个线程。我自己完成的唯一不同之处是创建了一个继承自 TableLayoutPanel 的 customTableLayoutPanel。

public partial class Form1 : Form
{
    bool resizing = false;
    TableLayoutRowStyleCollection rowStyles;
    TableLayoutColumnStyleCollection columnStyles;

    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        rowStyles = tableLayoutPanel1.RowStyles;
        columnStyles = tableLayoutPanel1.ColumnStyles;
    }

    private void tableLayoutPanel1_MouseDown(object sender, MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            resizing = true;
        }
    }

    private void tableLayoutPanel1_MouseMove(object sender, MouseEventArgs e)
    {
        if (resizing)
        {
            columnStyles[0].SizeType = SizeType.Absolute;
            rowStyles[0].SizeType = SizeType.Absolute;
            rowStyles[0].Height = e.Y;
            columnStyles[0].Width = e.X;
        }
    }

    private void tableLayoutPanel1_MouseUp(object sender, MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            resizing = false;
        }
    }
}

Answer 1

将 Column SizeType 和 Row SizeType 属性设置为 Absolute 和 CellBorderStyle 作为你想要的，而不是之后在代码中写成如下所示

public partial class Form1 : Form
{
    bool resizing = false;
    TableLayoutRowStyleCollection rowStyles;
    TableLayoutColumnStyleCollection columnStyles;
    int colindex = -1;
    int rowindex = -1;
    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        rowStyles = tableLayoutPanel1.RowStyles;
        columnStyles = tableLayoutPanel1.ColumnStyles;
    }
    private void tableLayoutPanel1_MouseDown(object sender, MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            rowStyles = tableLayoutPanel1.RowStyles;
            columnStyles = tableLayoutPanel1.ColumnStyles;
            resizing = true;
        }
    }

    private void tableLayoutPanel1_MouseMove(object sender, MouseEventArgs e)
    {
        if (!resizing)
        {
            float width = 0;
            float height = 0;
            //for rows
            for (int i = 0; i < rowStyles.Count; i++)
            {
                height += rowStyles[i].Height;
                if (e.Y > height - 3 && e.Y < height + 3)
                {
                    rowindex = i;
                    tableLayoutPanel1.Cursor = Cursors.HSplit;
                    break;
                }
                else
                {
                    rowindex = -1;
                    tableLayoutPanel1.Cursor = Cursors.Default;
                }
            }
            //for columns
            for (int i = 0; i < columnStyles.Count; i++)
            {
                width += columnStyles[i].Width;
                if (e.X > width - 3 && e.X < width + 3)
                {
                    colindex = i;
                    if (rowindex > -1)
                        tableLayoutPanel1.Cursor = Cursors.Cross;
                    else
                        tableLayoutPanel1.Cursor = Cursors.VSplit;
                    break;
                }
                else
                {
                    colindex = -1;
                    if (rowindex == -1)
                        tableLayoutPanel1.Cursor = Cursors.Default;
                }
            }
        }
        if (resizing && (colindex>-1 || rowindex > -1))
        {
            float width = e.X;
            float height = e.Y;
            if (colindex > -1)
            {
                for (int i = 0; i < colindex; i++)
                {
                    width -= columnStyles[i].Width;
                }
                columnStyles[colindex].SizeType = SizeType.Absolute;
                columnStyles[colindex].Width = width;
            }
            if (rowindex > -1)
            {
                for (int i = 0; i < rowindex; i++)
                {
                    height -= rowStyles[i].Height;
                }

                rowStyles[rowindex].SizeType = SizeType.Absolute;
                rowStyles[rowindex].Height = height;
            }
        }
    }

    private void tableLayoutPanel1_MouseUp(object sender, MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            resizing = false;
            tableLayoutPanel1.Cursor = Cursors.Default;
        }
    }
}