基本信息

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   源码介绍

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WaterImageDemo
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            cbPosition.Items.Clear();
            foreach (var item in Enum.GetValues(typeof (ImagePosition)))
            {
                cbPosition.Items.Add(item);
            }
            cbPosition.SelectedIndex = 0;
        }

        private void btnSelect_Click(object sender, EventArgs e)
        {
            var op = new OpenFileDialog();
            op.Filter = "All Image Files|*.bmp;*.ico;*.gif;*.jpeg;*.jpg;*.png;*.tif;*.tiff";
            if (op.ShowDialog() == DialogResult.OK)
            {
                var imgPath=System.IO.Path.GetFullPath(op.FileName); 
                var position = (ImagePosition)Enum.Parse(typeof (ImagePosition), this.cbPosition.SelectedItem.ToString());
                var water=new WaterImageManage();
                var waterImgPath = System.IO.Path.GetDirectoryName(new Uri(this.GetType().Assembly.CodeBase).LocalPath)   "\\watermark.png";
                var newImgPath = water.DrawImage(Path.GetFileName(imgPath), waterImgPath, (float)this.ud_alpha.Value, position, Path.GetDirectoryName(imgPath));
                if (File.Exists(newImgPath))
                {
                    //避免 "GDI  发生一般性错误"
                    Image img = Image.FromStream(new MemoryStream(File.ReadAllBytes(newImgPath)));
                    this.pictureBox1.Image = img;
                    
                }
                else MessageBox.Show("File Not Found:"   newImgPath);
            }
        }

       
    }
}