Programing in C#

Select 7 bottons

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 WFejemplo
{
public partial class frmboton : Form { public frmboton() { InitializeComponent(); }

private void button2_Click(object sender, EventArgs e) { btnprincipal.TextAlign = ContentAlignment.MiddleLeft;

} private void button3_Click(object sender, EventArgs e) { btnprincipal.Enabled = true; }

private void btninvisible_Click(object sender, EventArgs e) { btnprincipal.Visible = false; }

private void btnvisible_Click(object sender, EventArgs e) { btnprincipal.Visible = true; }

private void btnsalir_Click(object sender, EventArgs e) { Application.Exit(); }

private void btndeshabilitar_Click(object sender, EventArgs e) { btnprincipal.Enabled = false; }

private void btncolor_Click(object sender, EventArgs e) { btnprincipal.BackColor = Color.Chocolate; }

private void btncentrar_Click(object sender, EventArgs e) { btnprincipal.TextAlign = ContentAlignment.MiddleCenter; }

private void btnderecha_Click(object sender, EventArgs e) { btnprincipal.TextAlign = ContentAlignment.MiddleRight; }

private void btnposicion_Click(object sender, EventArgs e) { btnprincipal.Location = new Point(200, 150); }

private void btntexto_Click(object sender, EventArgs e) { btnprincipal.Text = "Carlos..."; }

private void btntamano_Click(object sender, EventArgs e) { btnprincipal.Size = new Size(120, 90); }

private void btnrestaurar_Click(object sender, EventArgs e) { btnprincipal.Enabled = true; btnprincipal.Size = new Size(237, 52); btnprincipal.Visible = true; btnprincipal.Text = "Ejemplo"; btnprincipal.Location = new Point (176,30); btnprincipal.TextAlign = ContentAlignment.MiddleCenter; btnprincipal.Height = 52; btnprincipal.Font = new Font ("Monotype Corsiva", 18, FontStyle.Italic); btnprincipal.BackColor = Color.Lime; }

private void btnancho_Click(object sender, EventArgs e) { btnprincipal.Width = 49; }

private void btnaltura_Click(object sender, EventArgs e) { btnprincipal.Height = 100; }

private void btnletra_Click(object sender, EventArgs e) { btnprincipal.Font = new Font("Arial", 30, FontStyle.Bold); } }
}

Select my name

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 WFejemplo2
{
public partial class Form1 : Form { public Form1() { InitializeComponent(); }

private void button3_Click(object sender, EventArgs e) { txtnombre.Focus(); }

private void label2_Click(object sender, EventArgs e) {

}

private void btnlectura_Click(object sender, EventArgs e) { if (txtnombre.ReadOnly) txtnombre.ReadOnly = false; else txtnombre.ReadOnly = true; }

private void txtnombre_TextChanged(object sender, EventArgs e) {

}

private void btnactivardesactivar_Click(object sender, EventArgs e) { if (txtnombre.Enabled) txtnombre.Enabled = false; else txtnombre.Enabled = true; }

private void btnsalir_Click(object sender, EventArgs e) { Application.Exit(); } }
}

Basic calculator

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 WFejemplo3
{
public partial class Form1 : Form { public Form1() { InitializeComponent(); }

float a, b, r;

private void btnsuma_Click(object sender, EventArgs e) { if ((txt1.Text.Length == 0) || (txt2.Text.Length == 0)) { MessageBox.Show("Le faltan Numeros"); txt1.Clear(); txt2.Clear(); } else {

lblsimbolo.Text = " + "; a = float.Parse(txt1.Text); b = float.Parse(txt2.Text); r = a + b; txt3.Text = r.ToString();

} }

private void btnresta_Click(object sender, EventArgs e) {

if ((txt1.Text.Length == 0) || (txt2.Text.Length == 0)) { MessageBox.Show("Le faltan Numeros"); txt1.Clear(); txt2.Clear();

} else {

lblsimbolo.Text = " - "; a = float.Parse(txt1.Text); b = float.Parse(txt2.Text); r = a - b; txt3.Text = r.ToString(); } }

private void btnmulti_Click(object sender, EventArgs e) {

if ((txt1.Text.Length == 0) || (txt2.Text.Length == 0)) { MessageBox.Show("Le faltan Numeros"); txt1.Clear(); txt2.Clear();

} else {

lblsimbolo.Text = " * "; a = float.Parse(txt1.Text); b = float.Parse(txt2.Text); r = a * b; txt3.Text = r.ToString(); } }

private void btndiv_Click(object sender, EventArgs e) {

if ((txt1.Text.Length == 0) || (txt2.Text.Length == 0)) { MessageBox.Show("Le faltan Numeros"); txt1.Clear(); txt2.Clear();

} else {

lblsimbolo.Text = " / "; a = float.Parse(txt1.Text); b = float.Parse(txt2.Text); r = a / b; txt3.Text = r.ToString(); } }

private void txt1_TextChanged(object sender, EventArgs e) {

}

private void txt2_TextChanged(object sender, EventArgs e) {

}

private void txt3_TextChanged(object sender, EventArgs e) {

}

private void lbl1_Click(object sender, EventArgs e) {

}

private void lbl3_Click(object sender, EventArgs e) {

}

private void lbl2_Click(object sender, EventArgs e) {

}

private void btnsalir_Click(object sender, EventArgs e) { this.Close(); }

private void btnlimpiar_Click(object sender, EventArgs e) { txt1.Clear(); txt2.Clear(); txt3.Clear(); }

private void Form1_Load(object sender, EventArgs e) {

}

private void label1_Click(object sender, EventArgs e) {

} }
}

lbl

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 WFejemplo4
{
public partial class Form1 : Form { public Form1() { InitializeComponent(); }

private void btnmostrar_Click(object sender, EventArgs e) { lblmgs.Text = "Bienvenido a C#, \n espero sea de su agrado"; txt1.Text = "Bienvenido a C#, \n espero sea de su agrado"; }

private void textBox1_TextChanged(object sender, EventArgs e) {

}

private void lblmgs_Click(object sender, EventArgs e) {

} }
}

Tree bottons

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 WFejemplo5
{
public partial class Form1 : Form { public Form1() { InitializeComponent(); }

private void textBox1_TextChanged(object sender, EventArgs e) {

}

private void textBox2_TextChanged(object sender, EventArgs e) {

}

private void lbl1_Click(object sender, EventArgs e) {

}

private void Form1_Load(object sender, EventArgs e) {

}

private void lbl2_Click(object sender, EventArgs e) {

}

private void textBox1_TextChanged_1(object sender, EventArgs e) {

}

private void btnsuma_Click(object sender, EventArgs e) { txtresultado.Text = (int.Parse(txtnum1.Text) + int.Parse(txtnum2.Text)).ToString(); }

private void button1_Click(object sender, EventArgs e) { Close(); } }
}

calculator

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 WFejemplo6
{
public partial class FrmOperaciones : Form { public FrmOperaciones() { InitializeComponent(); }

private void Form1_Load(object sender, EventArgs e) {

}

private void lbloperador_Click(object sender, EventArgs e) {

}

private void textBox2_TextChanged(object sender, EventArgs e) {

}

private void textBox1_TextChanged(object sender, EventArgs e) {

}

private void button1_Click(object sender, EventArgs e) { txtnum1.Clear(); txtnum2.Clear(); txtres.Clear();

}

private void btncalcular_Click(object sender, EventArgs e) { if ((txtnum1.Text.Length == 0) || (txtnum2.Text.Length == 0)) { MessageBox.Show("Le faltan Numeros"); txtnum1.Clear(); txtnum2.Clear();

} else if (cbxoperaciones.SelectedIndex==0)

{ lbloperador.Text = " + "; txtres.Text = (float.Parse(txtnum1.Text) + float.Parse(txtnum2.Text)).ToString(); } else if (cbxoperaciones.SelectedIndex==1) { lbloperador.Text = " - "; txtres.Text = (float.Parse(txtnum1.Text) - float.Parse(txtnum2.Text)).ToString(); } else if (cbxoperaciones.SelectedIndex==2) { lbloperador.Text = " * "; txtres.Text = (float.Parse(txtnum1.Text) * float.Parse(txtnum2.Text)).ToString(); } else if (cbxoperaciones.SelectedIndex == 3) { lbloperador.Text = " / "; txtres.Text = (float.Parse(txtnum1.Text) / float.Parse(txtnum2.Text)).ToString(); } }

private void cbxoperaciones_SelectedIndexChanged(object sender, EventArgs e) {

} }
}

using System;
Bottons with selection

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

namespace WFejemplo8
{
public partial class Form1 : Form { public Form1() { InitializeComponent(); }

private void button7_Click(object sender, EventArgs e) { cbxcolores.Items.Remove(txtcolor.Text); }

private void Form1_Load(object sender, EventArgs e) {

}

private void btncolor_Click(object sender, EventArgs e) { txtres.Text = cbxcolores.Text; }

private void btnindice_Click(object sender, EventArgs e) { txtres.Text = cbxcolores.SelectedIndex.ToString(); }

private void btntotal_Click(object sender, EventArgs e) { txtres.Text = cbxcolores.Items.Count.ToString(); }

private void btnagregaren_Click(object sender, EventArgs e) { cbxcolores.Items.Insert(int.Parse(txtposicion.Text), txtcolor.Text); }

private void btnagregarespe_Click(object sender, EventArgs e) { cbxcolores.Items.Add(txtcolor.Text); }

private void btnborrarselec_Click(object sender, EventArgs e) { cbxcolores.Items.Remove(cbxcolores.Text); }

private void btnborraren_Click(object sender, EventArgs e) { cbxcolores.Items.RemoveAt(int.Parse(txtposicion.Text)); }

private void btnborrartodo_Click(object sender, EventArgs e) { cbxcolores.Items.Clear(); } }
}