Numeric Textbox

Description:-

Formatting user input plays a major role in form data validations, so below example shows how to validate a text box for taking only numeric values of desired maximum size(example 10digt phone number).

Form1.cs

--------

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 Numerictextbox

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void textBox1_KeyPress(object sender, KeyPressEventArgs e)

        {

if (!(Char.IsDigit(e.KeyChar) || Char.IsControl(e.KeyChar)))             { e.Handled = true; }

//Using Function

        }

           if (!(Char.IsDigit(e.KeyChar) || Char.IsControl(e.KeyChar)))

            { e.Handled = true; }

        }

        private void textBox2_KeyPress(object sender, KeyPressEventArgs e)

        {

int asciiCode = Convert.ToInt32(e.KeyChar); if ((asciiCode >= 48 && asciiCode <=57)||Char.IsControl(e.KeyChar))

         

//Using ANSCII code

 {

        //Do nothing

   }

            else

            {

                e.Handled = true;

            }

        }

    }

}

  

Design :Form1

Property	Event
MaxLength=10                  (txtbox1)(txtbox2)	KeyPress                            (txtbox1)(txtbox2)

Screens:

------

         Fig:Form1

 Download entire project click below Icon

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Unknown 10:23  

Combination of Keypress

Description:-

 Combination of Key Press In C# win forms is used to create user friendly applications,

Without clicking buttons and redirecting to several forms is avoided by providing key combinations.

Form1.cs:

---------

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 keypresss

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_KeyDown(object sender, KeyEventArgs e)

        {

if (e.Alt && e.KeyCode==Keys.F5)

         

//Core Concept

  {

                report r = new report();

                r.Show();

                this.Hide();

            }

        }

    }

}

report.cs:

----------

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 keypresss

{

    public partial class report : Form

    {

        public report()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            Form1 f = new Form1();

            f.Show();

            this.Show();

        }

    }

}

Design :Form1

Property	Event
KeyPreview=false	KeyDown

Screens:

-------

         Fig:Form1

         Fig:report

Click below Icon for full project download    

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Unknown 07:49  

Redirection in Winforms

Description:-

Redirection is nothing but control transfers from one form to another form,

Below code explains how redirection takes place in win-forms application

Form1.cs:

---------

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 transfering

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

      private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)

        {

            Form2 f2 = new Form2();         //this is second form object creation

            f2.Show();                                 //showing the second form

            this.Hide();                               //hiding the Currunt form (Form1)

        }

    }

}

Form2.cs:

----------

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 transfering

{

    public partial class Form2 : Form

    {

        public Form2()

        {

            InitializeComponent();

        }

        private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)

        {

            Form1 f1 = new Form1();         //creating object for Form1

            f1.Show();                                 //showing Form1

            this.Hide();                               //hiding Current form(Form2)

        }

    }

}

Screens:

-------

         Fig:Form1

         Fig:Form2

Click below Icon for full project download 
                                         

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Unknown 10:08