How to create the
Capture Image || Login Image authentication creation in asp.net c#
Step 1:- Create one
asp page and name it as CaptureImage.aspx
In .CS file write
below code
namespace IDMSUI
{
public partial class CaptureImage : System.Web.UI.Page
{
protected void
Page_Load(object sender, EventArgs e)
{
GetCaptureImage();
}
public void
GetCaptureImage()
{
using (Bitmap b = new Bitmap(150, 40, PixelFormat.Format32bppArgb))
{
using (Graphics g = Graphics.FromImage(b))
{
Rectangle rect = new Rectangle(0, 0, 149, 39);
//Rectangle rect = new Rectangle(0, 0, 100, 25);
g.FillRectangle(Brushes.White, rect);
// Create string to draw.
Random r = new Random();
int
startIndex = r.Next(1, 5);
int length
= r.Next(5, 10);
String drawString = Guid.NewGuid().ToString().Replace("-", "0").Substring(startIndex, length);
Session["CaptureImageCode"] = drawString;
// Create font and brush.
Font drawFont = new Font("Arial", 16, FontStyle.Italic);
//Font drawFont = new Font("Arial", 16,
FontStyle.Italic | FontStyle.Strikeout);
//Font drawFont = new Font("Arial", 16,
FontStyle.Italic);
using (SolidBrush drawBrush = new SolidBrush(Color.Black))
{
// Create point for
upper-left corner of drawing.
PointF drawPoint = new PointF(15, 10);
// Draw string to screen.
g.DrawRectangle(new Pen(Color.Red, 0), rect);
g.DrawString(drawString, drawFont, drawBrush, drawPoint);
}
//b.Save(context.Response.OutputStream,
ImageFormat.Jpeg);
//context.Response.ContentType =
"image/jpeg";
//context.Response.End();
this.Response.Clear();
this.Response.ContentType
= "image/jpeg";
// Write the image to the response stream in JPEG
format.
b.Save(this.Response.OutputStream,
ImageFormat.Jpeg);
// Dispose of the CAPTCHA image object.
b.Dispose();
}
}
}
}
}