如何以编程方式将控件添加到窗体？

Question

我试图在面板中添加一个控件（标签）。 请参阅代码：

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Windows.Forms; 

namespace AddControlProgramatically 
{ 
    public partial class Form1 : Form 
    { 
     public Form1() 
     { 
      InitializeComponent(); 
     } 

     private void button1_Click(object sender, EventArgs e) 
     { 
      Label lbl = new Label(); 

      for (int x = 0; x <= 3; x++) 
      { 
       //create new label location after each loop 
       //by multiplying the new value of variable x by 5, so the new label 
       //control will not overlap each other. 
       lbl.Location = new System.Drawing.Point(52 + (x * 5), 58 + (x * 5)); 
       //create new id and text of the label 
       lbl.Name = "label_" + x.ToString(); 
       lbl.Text = "Label " + x.ToString(); 

       this.panel1.Controls.Add(lbl); 
      } 
     } 
    } 
} 

这里的形式。我试图完成的是以编程方式生成3个不同的控制标签。但正如你所看到的，它只显示最后一个。请帮助我解决这个问题。我知道我的代码有问题（因为它不工作）。谢谢...

Answer 1

将Label lbl = new Label();放入循环中。

，使偏移较大，改变了...

lbl.Location = new System.Drawing.Point(52 + (x * 5), 58 + (x * 5)) 

...到：

lbl.Location = new System.Drawing.Point(52 + (x * 30), 58 + (x * 30)) 

Answer 2

您需要在每次循环迭代中创建一个新标签。现在你只能创建一个标签。

private void button1_Click(object sender, EventArgs e) 
{ 
    for (int x = 0; x <= 3; x++) 
    { 
     Label lbl = new Label(); 

     //create new label location after each loop 
     //by multiplying the new value of variable x by 5, so the new label 
     //control will not overlap each other. 
     lbl.Location = new System.Drawing.Point(52 + (x * 5), 58 + (x * 5)); 
     //create new id and text of the label 
     lbl.Name = "label_" + x.ToString(); 
     lbl.Text = "Label " + x.ToString(); 

     this.panel1.Controls.Add(lbl); 
    } 
} 

Answer 3

你需要把你的Label lbl = new Label();循环for里面。