我想在运行时向我的选项卡控件添加一个具有值的按钮。很多教程展示了它是如何在创建与数据库的连接时完成的。有什么方法可以不连接数据库吗？
在我将数据输入两个文本框并单击保存后，新按钮应出现在另一个表单的选项卡控件上。
【问题讨论】：
在你保存按钮放：
private void btnSave_Click(object sender, EventArgs e)
{
x = 4;
y = panel1 .Controls.Count * 70;
Button newButton = new Button ();
newButton.Height = 150;
newButton.Width = 60;
newButton.Location = new Point(x, y);
newButton.Text= "your text";
newButton.Click += new
System.EventHandler(Button_Click);
tabControl1.TabPages [0].Controls.Add(newButton);
}
您还可以处理创建的新按钮的点击：
public void Button_Click(object sender, EventArgs e)
{
Button button = (Button)sender ;
MessageBox.Show("Button is pressed "+button .Text );
}
【讨论】：
我提出这样的决定
主要形式：
namespace stackoverflow
{
public partial class MainForm : Form
{
private static Form2 new_form = new Form2();
public MainForm()
{
InitializeComponent();
new_form.Show();
}
void Button1Click(object sender, EventArgs e)
{
new_form.CreateBtn( richTextBox1.Text );
}
}
}
第二种形式：
namespace stackoverflow
{
public partial class Form2 : Form
{
private Button btn = null;
public Form2()
{
InitializeComponent();
}
public void CreateBtn( string text ) {
if ( btn == null ) {
btn= new Button();
btn.Parent = this.tabPage1;
}
btn.Text = text;
this.Refresh();
}
}
}
【讨论】：
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 Buttons
{
public partial class Form1 : Form
{
const int ROWS = 5;
const int COLS = 10;
public Form1()
{
InitializeComponent();
this.Load += new System.EventHandler(this.Form1_Load);
}
public void Form1_Load(object sender, EventArgs e)
{
new MyButton(ROWS, COLS, this);
}
}
public class MyButton : Button
{
const int WIDTH = 50;
const int HEIGHT = 50;
const int SPACE = 5;
const int BORDER = 20;
public static List<List<MyButton>> buttons { get; set; }
public static List<MyButton> buttonList { get; set; }
public Form1 form1;
public int row { get; set; }
public int col { get; set; }
public MyButton()
{
}
public MyButton(int rows, int cols, Form1 form1)
{
buttons = new List<List<MyButton>>();
buttonList = new List<MyButton>();
this.form1 = form1;
for(int row = 0; row < rows; row++)
{
List<MyButton> newRow = new List<MyButton>();
buttons.Add(newRow);
for (int col = 0; col < cols; col++)
{
MyButton newButton = new MyButton();
newButton.Height = HEIGHT;
newButton.Width = WIDTH;
newButton.Top = row * (HEIGHT + SPACE) + BORDER;
newButton.Left = col * (WIDTH + SPACE) + BORDER;
newButton.row = row;
newButton.col = col;
newRow.Add(newButton);
buttonList.Add(newButton);
newButton.Click += new System.EventHandler(Button_Click);
form1.Controls.Add(newButton);
}
}
}
public void Button_Click(object sender, EventArgs e)
{
MyButton button = sender as MyButton;
MessageBox.Show(string.Format("Pressed Button Row {0} Column {1}", button.row, button.col));
}
}
}
动态
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 WindowsFormsApplication72
{
public partial class Form1 : Form
{
const int ROWS = 5;
const int COLS = 10;
public Form1()
{
InitializeComponent();
new PictureText(10, this);
}
}
public class PictureText : Panel
{
const int WIDTH = 50;
const int HEIGHT = 50;
const int SPACE = 5;
const int BORDER = 20;
public TextBox textbox { get; set; }
public PictureBox picturebox { get; set; }
public int row = 0;
public static List<PictureText> pictureText = null;
public PictureText() { }
public PictureText(int rows, Form1 form1)
{
this.Left = BORDER;
this.Top = BORDER ;
this.Width = 2 * (Width + BORDER);
this.Height = rows * (HEIGHT + BORDER);
this.BackColor = Color.Blue;
form1.Controls.Add(this);
pictureText = new List<PictureText>();
for(int row = 0; row < rows; row++)
{
PictureText newRow = new PictureText();
this.Controls.Add(newRow);
pictureText.Add(newRow);
newRow.textbox = new TextBox();
newRow.textbox.Text = "Hello";
newRow.picturebox = new PictureBox();
newRow.picturebox.BackColor = Color.Green;
newRow.picturebox.Text = "Goodbye";
this.Controls.Add(newRow.textbox);
this.Controls.Add(newRow.picturebox);
newRow.textbox.BringToFront();
newRow.textbox.Height = HEIGHT;
newRow.textbox.Width = WIDTH;
newRow.textbox.Top = row * (HEIGHT + SPACE) + BORDER;
newRow.textbox.Left = BORDER;
newRow.picturebox.BringToFront();
newRow.picturebox.Height = HEIGHT;
newRow.picturebox.Width = WIDTH;
newRow.picturebox.Top = row * (HEIGHT + SPACE) + BORDER;
newRow.picturebox.Left = 2 * (BORDER + Width);
}
}
}
}
【讨论】：