private int tabNum = 1;      
private int sensorNum = 5;      
private void InitializeUI()
{
    // 创建右侧容器面板
    Panel rightPanel = new Panel
    {
        Dock = DockStyle.Right,
        Width = 300,
        BackColor = SystemColors.ControlDark,
        Parent = this
    };

    // 根据防区数量创建内容
    if (tabNum > 1)
    {
        CreateTabbedContent(rightPanel);
    }
    else
    {
        CreateSingleTable(rightPanel);
    }
}

private void CreateTabbedContent(Panel parent)
{
    TabControl tabControl = new TabControl
    {
        Dock = DockStyle.Fill,
        Parent = parent
    };

    // 表格1
    TabPage tab1 = new TabPage("表格1");
    tabControl.TabPages.Add(tab1);
    CreateSingleTable(tab1);

    // 表格2
    TabPage tab2 = new TabPage("表格2");
    tabControl.TabPages.Add(tab2);
    CreateSingleTable(tab2);
}

private void CreateSingleTable(Control container)
{
    DataGridView dgv = new DataGridView
    {
        Dock = DockStyle.Fill,
        AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill,
        ScrollBars = ScrollBars.Vertical, // 最小化高度
        AllowUserToAddRows = false, // 关键修复：禁止显示空白新行
        RowHeadersVisible = false, // 关键修改：隐藏最左侧行头列
        Parent = container
    };

    // 创建列
    dgv.Columns.Add("LineOrder", "线序");

    dgv.Columns.Add("Val1", "电压值");

    DataGridViewCheckBoxColumn enableColumn = new DataGridViewCheckBoxColumn();
    enableColumn.HeaderText = "在线";
    dgv.Columns.Add(enableColumn);

    // 动态行
    for (int i = 1; i <= sensorNum; i++)
    {
        dgv.Rows.Add(i,  i + "0", false);
    }

    // 自动调整行高
    dgv.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;
}

private void Form1_Load(object sender, EventArgs e)
{
   InitializeUI();
}

//修改后

private int tabNum = 2;      
private int sensorNum = 5;      
private void InitializeUI()
{
    //panelTabs 是 一个panel

    // 根据防区数量创建内容
    if (tabNum > 1)
    {
        CreateTabbedContent(panelTabs);
    }
    else
    {
        CreateSingleTable(panelTabs);
    }
}

private void CreateTabbedContent(Panel parent)
{
    TabControl tabControl = new TabControl
    {
        Dock = DockStyle.Fill,
        Parent = parent
    };

    // 表格1
    TabPage tab1 = new TabPage("表格1");
    tabControl.TabPages.Add(tab1);
    CreateSingleTable(tab1);

    // 表格2
    TabPage tab2 = new TabPage("表格2");
    tabControl.TabPages.Add(tab2);
    CreateSingleTable(tab2);
}

private void CreateSingleTable(Control container)
{
    DataGridView dgv = new DataGridView
    {
        Dock = DockStyle.Fill,
        AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill,
        //ScrollBars = ScrollBars.Vertical, // 最小化高度 仅在需要时显示滚动条
        ScrollBars = ScrollBars.None,
        AllowUserToAddRows = false, // 关键修复：禁止显示空白新行
        RowHeadersVisible = false, // 关键修改：隐藏最左侧行头列
        BackgroundColor = container.BackColor, // 继承面板颜色
        Parent = container
    };

    // 创建列
    dgv.Columns.Add("LineOrder", "线序");

    dgv.Columns.Add("Val1", "电压值");

    DataGridViewCheckBoxColumn enableColumn = new DataGridViewCheckBoxColumn();
    enableColumn.HeaderText = "在线";
    dgv.Columns.Add(enableColumn);

    // 动态行
    for (int i = 1; i <= sensorNum; i++)
    {
        dgv.Rows.Add(i,  i, false);
    }

    // 自动调整行高
    dgv.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;

    // 计算并设置表格高度（关键步骤）
    //int headerHeight = dgv.ColumnHeadersHeight;          // 列头高度
    //int rowHeight = dgv.RowTemplate.Height;               // 单行高度
    int totalHeight = headerHeight + (rowHeight * 6);
    //int totalHeight = headerHeight + (rowHeight * sensorNum);
    //dgv.Height = totalHeight;

}