Redirect from Http to Https in ASP.NET

Hello frnds,
In my one project, there is a requirement for redirect some page from HTTP to HTTPS.
So find one great article that will help me. So here I post the link of that article and code of how its work.

http://www.xdevsoftware.com/blog/post/Redirect-from-Http-to-Https-in-ASPNET.aspx

Code:-
-------------------------------------------------------
Class File Name: SecurePages.cs
-------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Configuration;
using System.Collections.Specialized;
#region "SecurePage Class"
public class SecurePage
{
string _path = "";
string _pathType = "";

public string Path
{
get { return this._path; }
set { this._path = value; }
}

public string PathType
{
get { return this._pathType; }
set { this._pathType = value; }
}
}
#region "SecurePath Class"
public class SecurePath
{

public static bool IsSecure(string path)
{
List lstPages = new List();

bool isSecure = false;

try
{
//Fill the list of pages defined in web.config
NameValueCollection sectionPages = (NameValueCollection)ConfigurationManager.GetSection("SecurePages");

foreach (string key in sectionPages)
{
if ((!string.IsNullOrEmpty(key)) && (!string.IsNullOrEmpty(sectionPages.Get(key))))
{
lstPages.Add(new SecurePage { PathType = sectionPages.Get(key), Path = key });
}
}

//loop through the list to match the path with the value in the list item
foreach (SecurePage page in lstPages)
{
switch (page.PathType.ToLower().Trim())
{
case "directory":
if (path.Contains(page.Path))
{
isSecure = true;
}
break;
case "page":
if (path.ToLower().Trim() == page.Path.ToLower().Trim())
{
isSecure = true;
}
break;
default:
isSecure = false;
break;
}
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}

return isSecure;
}
}
#endregion

#endregion


/* Add New custom section in web.config */

<configuration>
<configSections>
<section name="SecurePages" type="System.Configuration.NameValueFileSectionHandler, System, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
</configSections>
<SecurePages>
<add key="/admin" value="directory" />
<add key="/WebForm2.aspx" value="page" />
<add key="/WebForm1.aspx" value="page" />
<add key="/myDir/myDirSec" value="directory" />
</SecurePages>
</configuration>

HTTP Handlers for Image resize in ASP.NET

Hello frnds,
Here I put the code of image resize using http handler.

Page:PhotoResizeHandler.ashx

<%@ WebHandler Language="C#" Class="PhotoResizeHandler" %>

using System;
using System.Web;
using System.IO;
using System.Drawing.Imaging;
using System.Drawing;
public class PhotoResizeHandler : IHttpHandler
{
string _StrImage = string.Empty;
string _StrExt = string.Empty;
int _IntThumbWidth;
int _IntThumbHeight;

public void ProcessRequest(HttpContext context)
{
if (context.Request.Params["Height"] != null)
{
try
{
_IntThumbHeight = int.Parse(context.Request.Params["Height"]);
}
catch
{
_IntThumbHeight = 0;
}
}
if (context.Request.Params["Width"] != null)
{
try
{
_IntThumbWidth = int.Parse(context.Request.Params["Width"]);
}
catch
{
_IntThumbWidth = 0;
}
}
if (context.Request.Params["Image"] != null)
{
try
{
_StrImage = (context.Request.Params["Image"]).ToString();
}
catch
{
_StrImage = string.Empty;
}
}
if (context.Request.Params["Ext"] != null)
{
try
{
_StrExt = (context.Request.Params["Ext"]).ToString();
}
catch
{
_StrExt = string.Empty;
}
}
ResizeImage(_StrImage, _IntThumbWidth, _IntThumbHeight, _StrExt);

}

public bool IsReusable
{
get
{
return false;
}
}


private void ResizeImage(string MainImage, int thumbWidth, int thumbHeight, string ext)
{
try
{
System.Drawing.Image Image = System.Drawing.Image.FromFile(MainImage);
int srcWidth = Image.Width;
int srcHeight = Image.Height;

int w = thumbWidth, h = thumbHeight;
#region "Proposnal Ratio"
// proposnal resize of your image
if (srcHeight > thumbHeight)
{
w = srcWidth * thumbHeight / srcHeight;
}
else
h = srcHeight;

if (srcWidth > thumbWidth)
{
h = srcHeight * thumbWidth / srcWidth;
}
else
if (w > srcWidth)
w = srcWidth;
if (w > thumbWidth)
h = srcHeight * thumbWidth / srcWidth;
if (h > thumbHeight)
w = srcWidth * thumbHeight / srcHeight;

thumbWidth = (thumbWidth > w ? w : thumbWidth);
thumbHeight = (thumbHeight > h ? h : thumbHeight);
thumbWidth = (thumbWidth == 0 ? 1 : thumbWidth);
thumbHeight = (thumbHeight == 0 ? 1 : thumbHeight);

#endregion

Bitmap bmp = new Bitmap(thumbWidth, thumbHeight);
System.Drawing.Graphics gr = System.Drawing.Graphics.FromImage(bmp);
gr.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
gr.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
gr.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

System.Drawing.Rectangle rectDestination = new System.Drawing.Rectangle(0, 0, thumbWidth, thumbHeight);
gr.DrawImage(Image, rectDestination, 0, 0, srcWidth, srcHeight, GraphicsUnit.Pixel);

switch (ext.ToUpper())
{
case ".JPG":
case ".JPEG":
HttpContext.Current.Response.ContentType = "image/Jpeg";
bmp.Save(HttpContext.Current.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
break;
case ".GIF":
HttpContext.Current.Response.ContentType = "image/Gif";
bmp.Save(HttpContext.Current.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Gif);
break;
case ".PNG":
System.IO.MemoryStream MemStream = new System.IO.MemoryStream();
HttpContext.Current.Response.ContentType = "image/Png";
bmp.Save(MemStream, System.Drawing.Imaging.ImageFormat.Png);

MemStream.WriteTo(HttpContext.Current.Response.OutputStream);
//bmp.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Png );
break;
}
Image.Dispose();
}
catch (Exception Exc)
{
throw Exc;
}

}
}

Now you need to add one aspx page and create one asp:image controls there.

<asp:Image ID="img" runat="server" />

Then in cs file with on page load event, try to put this line
img.ImageUrl = "PhotoResizeHandler.ashx?Image=" + MainImage + "&Width=65&Height=65&Ext=" + ext;

Hopes this will help you.

Regards,
Kinjal Shah