C#WinForm練習——點選button按鈕使窗體中文字框都顯示“好好學習,天天向上”
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 TestForm
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
/// <summary>
/// Button按鈕:當點選按鈕窗體中的文字框都顯示“好好學習,天天向上”
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
//迴圈遍歷窗體中所有的控制元件 this.Controls指這個窗體中所有的控制元件
foreach (Control item in this.Controls)
{
//如果是文字框
if (item is TextBox)
{
((TextBox)item).Text = "好好學習,天天向上";
}
}
}
}
}