In this article, you will learn how to Get Captcha Image in c#
public FileResult GetCaptchaImage()
{
MemoryStream ms = new MemoryStream();
if (Session["CAPTCHA"] != null)
{
string text = Session["CAPTCHA"].ToString();
//first, create a dummy bitmap just to get a graphics object
Image img = new Bitmap(1, 1);
Graphics drawing = Graphics.FromImage(img);
Font font = new Font("Arial", 15);
//measure the string to see how big the image needs to be
SizeF textSize = drawing.MeasureString(text, font);
//free up the dummy image and old graphics object
img.Dispose();
drawing.Dispose();
//create a new image of the right size
img = new Bitmap((int)textSize.Width + 40, (int)textSize.Height + 20);
drawing = Graphics.FromImage(img);
Color backColor = Color.SeaShell;
Color textColor = Color.Red;
//paint the background
drawing.Clear(backColor);
//create a brush for the text
Brush textBrush = new SolidBrush(textColor);
drawing.DrawString(text, font, textBrush, 20, 10);
drawing.Save();
font.Dispose();
textBrush.Dispose();
drawing.Dispose();
img.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
img.Dispose();
return File(ms.ToArray(), "image/png");
}
else
{
return File(ms.ToArray(), "image/png");
}
}Get Captcha Image c#
C# is a programming language developed by Microsoft that runs on the .NET Framework. C# is used to develop web, desktop, mobile, games and much more application.
C# is a object-oriented programming language developed by Microsoft within its .NET Framework. Led by Anders Hejlsberg, your basic C# programming
and will also take you through various advanced concepts related to C# programming language.
C# such as control statements, objects and classes, inheritance, constructor, destructor, this, static, sealed, polymorphism, abstraction, abstract class, interface, File IO, Collections, namespace, encapsulation, properties, indexer, arrays, strings, regex, exception handling, multithreading etc.
For example...
using System;
namespace MinifyCode
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello Minify Code");
}
}
}
Output: Hello Minify Code
In this article you will learn, what is server side controls. We will discuss each of these objects in due time. In this tutorial we will explore the Server object, the Request object, and the Response object.
Session
Application
Cache
Request
Response
Server
User
Trace
Server Object
The Server object in Asp.NET is an instance of the System.Web.HttpServerUtility class. The HttpServerUtility class provides numerous properties and methods to perform many type of jobs.
Methods and Properties of the Server object
The methods and properties of the HttpServerUtility class are exposed through the intrinsic Server object provided by ASP.NET.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Optimization;
using System.Web.Routing;
using System.Web.Security;
using System.Web.SessionState;
using System.Data.Entity;
namespace minifycode
{
public class Global : HttpApplication
{
void Application_Start(object sender, EventArgs e)
{
// Code that runs on application startup
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
// Initialize the product database.
Database.SetInitializer(new ProductDatabaseInitializer());
// Create custom role and user.
RoleActions roleActions = new RoleActions();
roleActions.AddUserAndRole();
// Add Routes.
RegisterCustomRoutes(RouteTable.Routes);
}
void RegisterCustomRoutes(RouteCollection routes)
{
routes.MapPageRoute(
"ProductsCategoryRoute",
"Category/{categoryName}",
"~/ProductList.aspx"
);
routes.MapPageRoute(
"ProductNameRoute",
"Product/{productName}",
"~/ProductDetails.aspx"
);
}
}
}