DockPanel 子窗體如何在父窗體打開另一子窗體，以選項卡式存在

父窗體代碼：

//dockPanel1爲DockPanel的實例
FrmOption frmOption = new FrmOption(dockPanel1);
frmOption.Show(dockPanel1);

子窗體代碼:

public partial class FrmOption : DockContent { private readonly DockPanel dockPanel1 = new DockPanel(); public FrmOption(DockPanel dockPanel1) { InitializeComponent(); this.dockPanel1 = dockPanel1; } private void FrmOption_Load(object sender, EventArgs e) { //調用父窗體的ToolStripProgressBar ,在父窗體ToolStripProgressBar

必須設置爲Modifier=Internal以上級別 ToolStripProgressBar toolStripProgressBar = ((MainForm)MdiParent).toolStripProgressBar; toolStripProgressBar.Visible = true; toolStripProgressBar.Value = 90; } private void button1_Click(object sender, EventArgs e) { MainForm mainForm = MdiParent as MainForm; foreach (Form child in mainForm.MdiChildren) { //此處將在父窗體選項卡上顯示 if (child.Name == "FrmDepartment") { child.Activate(); return; } } FrmDepartment frm = new FrmDepartment(); frm.Show(dockPanel1); } }