DZone Snippets: Edgardo's Code Snippets

Add consolas to cmd.exe

Edgardo (Edgardo Rossetto) — Thu, 24 Apr 2008 15:19:44 GMT

// description of your code here



reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Console\TrueTypeFont" /v 00 /d Consolas

logoff

Read image metadata withWPF

Edgardo (Edgardo Rossetto) — Tue, 19 Jun 2007 19:58:44 GMT

// description of your code here



FileStream fs = new FileStream("image.jpg", FileMode.Open, FileAccess.Read, FileShare.Read);

BitmapDecoder decoder = BitmapDecoder.Create(fs, BitmapCreateOptions.None, BitmapCacheOption.Default);

BitmapFrame frame = decoder.Frames[0];

BitmapMetadata metadata = frame.Metadata as BitmapMetadata;

Calculate MD5 hash

Edgardo (Edgardo Rossetto) — Wed, 06 Jun 2007 21:14:46 GMT

// description of your code here
http://blogs.msdn.com/csharpfaq/archive/2006/10/09/How-do-I-calculate-a-MD5-hash-from-a-string_3F00_.aspx



public string CalculateMD5Hash(string input)

{

    // step 1, calculate MD5 hash from input

    MD5 md5 = System.Security.Cryptography.MD5.Create();

    byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(input);

    byte[] hash = md5.ComputeHash(inputBytes);

 

    // step 2, convert byte array to hex string

    StringBuilder sb = new StringBuilder();

    for (int i = 0; i < hash.Length; i++)

    {

        sb.Append(hash[i].ToString("X2"));

    }

    return sb.ToString();

}

Calculate age in C#

Edgardo (Edgardo Rossetto) — Sat, 04 Mar 2006 07:04:01 GMT

using System;
using System.Data;



public static class Snippets

{

    public static int CalculateAge(DateTime birthdate)

    {

        // get the difference in years

        int years = DateTime.Now.Year - birthdate.Year;

        // subtract another year if we're before the

        // birth day in the current year

        if (DateTime.Now.Month < birthdate.Month || (DateTime.Now.Month == birthdate.Month && DateTime.Now.Day < birthdate.Day))

            years--;



        return years;

    }

}

Resize image with .NET

Edgardo (Edgardo Rossetto) — Tue, 14 Feb 2006 23:35:29 GMT

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;



public static byte[] ResizeImageFile(byte[] imageFile, int targetSize)

{

    Image original = Image.FromStream(new MemoryStream(imageFile));

    int targetH, targetW;

    if (original.Height > original.Width)

    {

        targetH = targetSize;

        targetW = (int)(original.Width * ((float)targetSize / (float)original.Height));

    }

    else

    {

        targetW = targetSize;

        targetH = (int)(original.Height * ((float)targetSize / (float)original.Width));

    }

    Image imgPhoto = Image.FromStream(new MemoryStream(imageFile));

    // Create a new blank canvas.  The resized image will be drawn on this canvas.

    Bitmap bmPhoto = new Bitmap(targetW, targetH, PixelFormat.Format24bppRgb);

    bmPhoto.SetResolution(72, 72);

    Graphics grPhoto = Graphics.FromImage(bmPhoto);

    grPhoto.SmoothingMode = SmoothingMode.AntiAlias;

    grPhoto.InterpolationMode = InterpolationMode.HighQualityBicubic;

    grPhoto.PixelOffsetMode = PixelOffsetMode.HighQuality;

    grPhoto.DrawImage(imgPhoto, new Rectangle(0, 0, targetW, targetH), 0, 0, original.Width, original.Height, GraphicsUnit.Pixel);

    // Save out to memory and then to a file.  We dispose of all objects to make sure the files don't stay locked.

    MemoryStream mm = new MemoryStream();

    bmPhoto.Save(mm, System.Drawing.Imaging.ImageFormat.Jpeg);

    original.Dispose();

    imgPhoto.Dispose();

    bmPhoto.Dispose();

    grPhoto.Dispose();

    return mm.GetBuffer();

}

Crop image with .NET

Edgardo (Edgardo Rossetto) — Tue, 14 Feb 2006 23:34:05 GMT

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;



public static byte[] CropImageFile(byte[] imageFile, int targetW, int targetH, int targetX, int targetY)

{

    Image imgPhoto = Image.FromStream(new MemoryStream(imageFile));

    Bitmap bmPhoto = new Bitmap(targetW, targetH, PixelFormat.Format24bppRgb);

    bmPhoto.SetResolution(72, 72);

    Graphics grPhoto = Graphics.FromImage(bmPhoto);

    grPhoto.SmoothingMode = SmoothingMode.AntiAlias;

    grPhoto.InterpolationMode = InterpolationMode.HighQualityBicubic;

    grPhoto.PixelOffsetMode = PixelOffsetMode.HighQuality;

    grPhoto.DrawImage(imgPhoto, new Rectangle(0, 0, targetW, targetH), targetX, targetY, targetW, targetH, GraphicsUnit.Pixel);

    // Save out to memory and then to a file.  We dispose of all objects to make sure the files don't stay locked.

    MemoryStream mm = new MemoryStream();

    bmPhoto.Save(mm, System.Drawing.Imaging.ImageFormat.Jpeg);

    imgPhoto.Dispose();

    bmPhoto.Dispose();

    grPhoto.Dispose();

    return mm.GetBuffer();

}

Autenticando por UserName o Email

Edgardo (Edgardo Rossetto) — Mon, 30 Jan 2006 14:51:29 GMT



protected void Login1_LoggingIn(object sender, LoginCancelEventArgs e)

{

    Regex r = new Regex(@"\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*", RegexOptions.Compiled);

 

    // sólo si el usuario ingreso un email

    if (r.IsMatch(Login1.UserName))

    {

        string username = Membership.GetUserNameByEmail(Login1.UserName);

 

        // esto significa que el usuario ingresó un email que no existe

        if (String.IsNullOrEmpty(username))

        {

            // mostramos un mensaje de error amigable y cancelamos la autenticación

            Literal error = Login1.FindControl("FailureText") as Literal;

            error.Text = "La dirección de email no se encuentra en nuestros registros.";

            e.Cancel = true;

        }

 

        else

        {

            // Encontramos el nombre de usuario :)

            // Reemplaza el email por el UserName verdadero

            Login1.UserName = username;

        }

    }

}

Mandar mail con ASP.NET 2.0

Edgardo (Edgardo Rossetto) — Mon, 30 Jan 2006 14:45:38 GMT



MailMessage message = new MailMessage();

message.From = new MailAddress("remitente@lo.que.sea");

message.To.Add(new MailAddress("destinatario@lo.que.sea"));

message.Subject = "Asunto";

message.Body = "Cuerpo";

SmtpClient client = new SmtpClient();

client.Send(message);

web.config