Count lines in the TextBox and read text in TextBox line by line : TextBox : GUI Windows Forms C# Examples

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

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

        private  void  showLinesButton_Click(object  sender,  EventArgs  e)
        {
                StringBuilder  lineInfo  =  new  StringBuilder();
                lineInfo.Append("There  are  "  +  multiLineBox.Lines.Length.ToString()  +  "  lines.\n");
                foreach  (string  line  in  multiLineBox.Lines)
                {
                        lineInfo.Append(line  +  "\n");
                }

                MessageBox.Show(lineInfo.ToString());
        }
}
partial  class  Form1
{
        private  void  InitializeComponent()
        {
                this.multiLineBox  =  new  System.Windows.Forms.TextBox();
                this.showLinesButton  =  new  System.Windows.Forms.Button();
                this.SuspendLayout();
                //  
                //  multiLineBox
                //  
                this.multiLineBox.Location  =  new  System.Drawing.Point(12,  12);
                this.multiLineBox.Multiline  =  true;
                this.multiLineBox.Name  =  "multiLineBox";
                this.multiLineBox.Size  =  new  System.Drawing.Size(268,  213);
                this.multiLineBox.TabIndex  =  0;
                //  
                //  showLinesButton
                //  
                this.showLinesButton.Location  =  new  System.Drawing.Point(205,  231);
                this.showLinesButton.Name  =  "showLinesButton";
                this.showLinesButton.Size  =  new  System.Drawing.Size(75,  23);
                this.showLinesButton.TabIndex  =  1;
                this.showLinesButton.Text  =  "Show  Lines";
                this.showLinesButton.Click  +=  new  System.EventHandler(this.showLinesButton_Click);
                //  
                //  Form1
                //  
                this.AutoScaleDimensions  =  new  System.Drawing.SizeF(6F,  13F);
                this.AutoScaleMode  =  System.Windows.Forms.AutoScaleMode.Font;
                this.ClientSize  =  new  System.Drawing.Size(292,  266);
                this.Controls.Add(this.showLinesButton);
                this.Controls.Add(this.multiLineBox);
                this.Name  =  "Form1";
                this.Text  =  "Form1";
                this.ResumeLayout(false);
                this.PerformLayout();

        }

        private  System.Windows.Forms.TextBox  multiLineBox;
        private  System.Windows.Forms.Button  showLinesButton;
}
public  class  TextBoxLineCountText
{
        [STAThread]
        static  void  Main()
        {
                Application.EnableVisualStyles();
                Application.Run(new  Form1());
        }
}