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定义变量
UserControl1 urs1_Control; UserControl2 urs2_Control; UserControl3 urs3_Control; UserControl4 urs4_Control; private void Form1_Load(object sender, EventArgs e) { urs1_Control = new UserControl1(); //UserControl1为新建子画面 urs2_Control = new UserControl2(); urs3_Control = new UserControl3(); urs4_Control = new UserControl4();
}
按钮中的内容
private void button1_Click(object sender, EventArgs e) {
var userControl = urs1_Control; if (panel1.Controls.Count > 0 && panel1.Controls[0] is UserControl1) { panel1.Controls[0].Focus(); return; }
panel1.Controls.Clear(); //panel1为定义的panel panel1.Controls.Add(userControl); userControl.Dock = DockStyle.Fill; userControl.Show(); }
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