控件上添加控件无效

Question

public void AddMyControls1(int pos_width, int pos_height, string text, string name)
        {
            Label UserControl = new Label();
            UserControl.Name = "lbl" + name;
            UserControl.Text = text;
            UserControl.ForeColor = SystemColors.ControlLightLight;
            UserControl.Location = new Point(6, 30 + pos_height);
            UserControl.Size = new Size(53, 12);
            //UserControl.TopLevelControl = this.groupBox5;
            //this.groupBox5.Controls.Add(UserControl);
            this.groupBox5.Controls.Add(UserControl);
            LabArray[TxtNum - 2] = UserControl;
    
        }我 用这段代码在groupBox5添加LABEL控件没有效果,
但把这句
this.groupBox5.Controls.Add(this.label1);
写到主函数里却是有效果的我问下是那里出了问题啊

Answer 1

你添加到Controls的UserControl应该设置Visible属性为True才行:
UserControl.Visible=true;

Answer 2

public void AddMyControls1(int pos_width, int pos_height, string text, string name)
        {
            Label UserControl = new Label();
            UserControl.Name = "lbl" + name;
            UserControl.Text = text;
            UserControl.ForeColor = SystemColors.ControlLightLight;
            UserControl.Location = new Point(6, 30 + pos_height);
            UserControl.Size = new Size(53, 12);
            //UserControl.TopLevelControl = this.groupBox5;
            //this.groupBox5.Controls.Add(UserControl);
            UserControl.Visible = true;            this.groupBox5.Controls.Add(UserControl);
            //MessageBox.Show("aa");
            LabArray[TxtNum - 2] = UserControl;
    
        } case 2:
                        AddMyControls1(0, 322, "内容一：", "2");这样是没效果的
放到这个函数里不行 
放到函数外面就可以了      case 2:
 
                        Label aa = new Label();
                        aa.Text = "sssssssssssss";
                        this.groupBox5.Controls.Add(aa)这样是可以的
通过
 this.groupBox5.Controls.Add(UserControl);
            MessageBox.Show("aa");
测试函数已经执行到那步了
就是在窗体上看不到生成的控件

Answer 3

是不是你生成控件的Location已经超出了你这个groupBox5的范围了