How to Create Text or Watermark Dynamically in Image in Asp.net

Description:-

A watermark is an identifying image or pattern in Paper that appears as various shades of lightness/darkness when viewed by transmitted light. It’s nothing but the identity of image.

Step 1: Create Webpage and Open Code behind file So We Can Crate Dynamically Watermark in Image. In Page_Load event Create Code for Watermark in Image.

protected void Page_Load(object sender, EventArgs e)
{
    //creating a image object
    System.Drawing.Image bitmap = (System.Drawing.Image)Bitmap.FromFile(Server.MapPath("Lava.JPG")); // set image 
    //draw the image object using a Graphics object
    Graphics graphicsImage = Graphics.FromImage(bitmap);

    //Set the alignment based on the coordinates   
    StringFormat stringformat = new StringFormat();
    stringformat.Alignment = StringAlignment.Far;
    stringformat.LineAlignment = StringAlignment.Far;

    StringFormat stringformat2 = new StringFormat();
    stringformat2.Alignment = StringAlignment.Center;
    stringformat2.LineAlignment = StringAlignment.Center;

    StringFormat stringformat3 = new StringFormat();
    stringformat3.Alignment = StringAlignment.Center;
    stringformat3.LineAlignment = StringAlignment.Center;

    //Set the font color/format/size etc..  
    Color StringColor = System.Drawing.ColorTranslator.FromHtml("#FF0040");//customise color adding
    Color StringColor2 = System.Drawing.ColorTranslator.FromHtml("#e80c88");//customise color adding
    Color StringColor3 = System.Drawing.ColorTranslator.FromHtml("#F781F3");//customise color adding
    string Str_TextOnImage = "Patel";//Your Text On Image
    string Str_TextOnImage2 = "Umesh";//Your Text On Image

    graphicsImage.DrawString(Str_TextOnImage, new Font("arial", 40,
    FontStyle.Regular), new SolidBrush(StringColor), new Point(268, 245),
    stringformat); Response.ContentType = "image/jpeg";

    graphicsImage.DrawString(Str_TextOnImage2, new Font("Edwardian Script ITC", 111,
    FontStyle.Bold), new SolidBrush(StringColor2), new Point(145, 255),
    stringformat2); Response.ContentType = "image/jpeg"; 

    bitmap.Save(Response.OutputStream, ImageFormat.Jpeg);
}

We will create bitmap image and set Colour, Text, Style on Image and Store image in where you want to save.

For that you have to add Namespaces.

using System.Drawing;

using System.Drawing.Imaging;

Step 2: Now Open your Webpage There in Image you Can See your Created Watermark in Image.

Author : Umesh Patel

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