C#窗体自定义控件

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Drawing;
 using System.Data;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
 
 namespace WindowsFormsApplication1
 {
     public partial class TestControl : UserControl
     {
         private string UserName="";
         public TestControl()
         {
             InitializeComponent();
         }
         public TestControl(string uid)
         {
             InitializeComponent();
             UserName = uid;
         }
 
         private void TestControl_Load(object sender, EventArgs e)
         {
             YongHuDA da = new YongHuDA();
             YongHu data = da.Select(UserName);
 
             pictureBox1.BackgroundImage = Image.FromFile(data.Pic);
             pictureBox1.BackgroundImageLayout = ImageLayout.Zoom;
 
             label1.Text = data.Nick;
             label2.Text = data.Qian;
 
             button1.Tag = data.Uid;
         }
 
         private void pictureBox1_Click(object sender, EventArgs e)
         {
             //label1.Text;
             this.ParentForm.Controls["label1"].Text = label1.Text;
 
         }
 
         private void button1_Click(object sender, EventArgs e)
         {
 
         }
 
     }
 }

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
 
 namespace WindowsFormsApplication1
 {
     public partial class Form1 : Form
     {
         public Form1()
         {
             InitializeComponent();
         }
 
         private void Form1_Load(object sender, EventArgs e)
         {
             YongHuDA da = new YongHuDA();
             List<YongHu> list = da.Select();
 
             foreach (YongHu data in list)
             {
                 TestControl ctrl = new TestControl(data.Uid);
                 flowLayoutPanel1.Controls.Add(ctrl);
             }
         }
     }
 }