frmWater.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Imaging;
namespace PictureManage
{
    public partial class frmWater : Form
    {
        public frmWater()
        {
            InitializeComponent();
        }
        public Image ig;
        public string FPath;
        FontStyle Fstyle = FontStyle.Regular;
        float Fsize = 18;
        Color Fcolor = System.Drawing.Color.Yellow;
        FontFamily a = FontFamily.GenericMonospace;
        int Fwidth;
        int Fheight;

        public void makeWatermark(int x,int y,string txt)
        {
            System.Drawing.Image image = Image.FromFile(FPath);
            System.Drawing.Graphics e = System.Drawing.Graphics.FromImage(image);
            System.Drawing.Font f = new System.Drawing.Font(a, Fsize,Fstyle);
            System.Drawing.Brush b = new System.Drawing.SolidBrush(Fcolor);
            e.DrawString(txt, f, b, x, y);
            SizeF XMaxSize = e.MeasureString(txt,f);

            Fwidth = (int)XMaxSize.Width;
            Fheight = (int)XMaxSize.Height;

            e.Dispose();
            pictureBox1.Image = image;
        }
        private void frmWater_Load(object sender, EventArgs e)
        {
            pictureBox1.Image = ig;
        }

        private void button1_Click_1(object sender, EventArgs e)
        {
            pictureBox1.Image = ig;
            if (txtChar.Text.Trim() != "")
            {
                if (radioButton1.Checked)
                {
                    int x = 10, y = 10;
                    makeWatermark(x, y, txtChar.Text.Trim());
                }
                if (radioButton2.Checked)
                {
                    int x1 = 10, y1 = ig.Height - Fheight;
                    makeWatermark(x1, y1, txtChar.Text.Trim());
                }