Set Label text in a button click event : Button : GUI Windows Forms C# Examples

    
using  System;
using  System.Drawing;
using  System.Collections;
using  System.ComponentModel;
using  System.Windows.Forms;
using  System.Data;

public  class  ButtonActionSetLabelTextBox  :  System.Windows.Forms.Form
{
        private  System.Windows.Forms.Label  label1;
        private  System.Windows.Forms.TextBox  textBox1;
        private  System.Windows.Forms.Button  button1;

        private  System.ComponentModel.Container  components  =  null;

        public  ButtonActionSetLabelTextBox()
        {
                InitializeComponent();
        }

        protected  override  void  Dispose(  bool  disposing  )
        {
                if(  disposing  )
                {
                        if  (components  !=  null)  
                        {
                                components.Dispose();
                        }
                }
                base.Dispose(  disposing  );
        }

        #region  Windows  Form  Designer  generated  code
        private  void  InitializeComponent()
        {
                this.label1  =  new  System.Windows.Forms.Label();
                this.textBox1  =  new  System.Windows.Forms.TextBox();
                this.button1  =  new  System.Windows.Forms.Button();
                this.SuspendLayout();

                this.label1.Location  =  new  System.Drawing.Point(32,  24);
                this.label1.Name  =  "label1";
                this.label1.TabIndex  =  0;
                this.label1.Text  =  "Hello  World";

                this.textBox1.Location  =  new  System.Drawing.Point(24,  128);
                this.textBox1.Name  =  "textBox1";
                this.textBox1.TabIndex  =  1;
                this.textBox1.Text  =  "";

                this.button1.Location  =  new  System.Drawing.Point(24,  168);
                this.button1.Name  =  "button1";
                this.button1.TabIndex  =  2;
                this.button1.Text  =  "Say  hello";
                this.button1.Click  +=  new  System.EventHandler(this.button1_Click);

                this.AutoScaleBaseSize  =  new  System.Drawing.Size(5,  13);
                this.ClientSize  =  new  System.Drawing.Size(292,  266);
                this.Controls.AddRange(new  System.Windows.Forms.Control[]  {this.button1,
                                                                                                                                            this.textBox1,
                                                                                                                                            this.label1});
                this.Name  =  "ButtonActionSetLabelTextBox";
                this.Text  =  "ButtonActionSetLabelTextBox";
                this.ResumeLayout(false);

        }
        #endregion

        [STAThread]
        static  void  Main()  
        {
                Application.Run(new  ButtonActionSetLabelTextBox());
        }

        private  void  button1_Click(object  sender,  System.EventArgs  e)
        {
                label1.Text  =  "Hello  "  +  textBox1.Text;
        }
}