按钮上的选项卡控件中打开Windows窗体单击 [英] Open A Windows Form in Tab Control on Button Click

问题描述

我想在Button上打开一个Windows窗体。在一个Tabcontrol上。

我该怎么办？

我的COde就像....... ..................................

........ .................................................. .............................

if（e.Node.Name ==Node1）

{

TabPage tbp = new TabPage（）;

childForm.TopLevel = false;

tabControl1.TabPages .Add（tbp）;

tbp.Controls.Add（childForm）;

tbp.Text =Main;

//已添加表格到标签页

childForm.WindowState = FormWindowState.Maximized;

//如果此页面已经打开............. />
if（childForm.IsHandleCreated == true）

{

tabControl1.Focus（）;

tabControl1.TabPages [ TBP ] .Show（）;

tabControl1.TabPages [tbp]。选择（）;



}

else

{



childForm.Show（）;



}

......................................... .......................................

但这是给出错误....对象未设置为Object的实例

I want to open a windows form on Button click.in a Tabcontrol.
How should I do?
My COde Is Like.........................................
.......................................................................................
if (e.Node.Name == "Node1")
{
TabPage tbp = new TabPage();
childForm.TopLevel = false;
tabControl1.TabPages.Add(tbp);
tbp.Controls.Add(childForm);
tbp.Text = "Main";
//Added form to tabpage
childForm.WindowState = FormWindowState.Maximized;
//if this page is Already Open.............
if (childForm.IsHandleCreated == true)
{
tabControl1.Focus();
tabControl1.TabPages["tbp"].Show();
tabControl1.TabPages["tbp"].Select();

}
else
{

childForm.Show();

}
................................................................................
but this is giving error....Object not set to instance of Object

推荐答案

在按钮单击事件中，您执行以下操作：

In the button click event, you do:

Form2 frm = new Form2();  //Or whatever your form is called
frm.Show(this);

或（如果你想以模态方式打开它）：

or (if you want to open it modally):

Form2 frm = new Form2();  //Or whatever your form is called
frm.ShowDialog(this);

您还需要在tabpages的控件集合中添加表单对象，如下所示：

You also need to add form object in tabpages'' control collection as below:

private void button1_Click(object sender, EventArgs e)
{
    Form2 frm = new Form2();
    frm.TopLevel = false;
    tabPage1.Controls.Add(frm);
    frm.Dock = DockStyle.Fill;
    frm.Show();
}

检查这个

选项卡式MDI子窗体 [ ^ ]

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