C# 图片加水印源码（支持不同位置以及水印清晰度）

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

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2016-08-03 10:38  WaterImageDemo\
     文件        1011  2016-08-03 09:10  WaterImageDemo.sln
     目录           0  2016-08-03 09:10  WaterImageDemo\bin\
     目录           0  2016-08-03 09:48  WaterImageDemo\bin\Debug\
     文件       16384  2016-08-03 10:39  WaterImageDemo\bin\Debug\WaterImageDemo.exe
     文件       36352  2016-08-03 10:39  WaterImageDemo\bin\Debug\WaterImageDemo.pdb
     文件       22656  2016-08-03 10:31  WaterImageDemo\bin\Debug\WaterImageDemo.vshost.exe
     文件         490  2012-06-02 22:34  WaterImageDemo\bin\Debug\WaterImageDemo.vshost.exe.manifest
     文件        2448  2016-08-03 09:47  WaterImageDemo\bin\Debug\watermark.png
     文件        1925  2016-08-03 10:38  WaterImageDemo\Form1.cs
     文件        6132  2016-08-03 10:38  WaterImageDemo\Form1.Designer.cs
     文件        5817  2016-08-03 10:38  WaterImageDemo\Form1.resx
     目录           0  2016-08-03 09:10  WaterImageDemo\obj\
     目录           0  2016-08-03 10:39  WaterImageDemo\obj\Debug\
     文件         865  2016-08-03 09:10  WaterImageDemo\obj\Debug\DesignTimeResolveAssemblyReferences.cache
     文件        6973  2016-08-03 09:47  WaterImageDemo\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     目录           0  2016-08-03 09:10  WaterImageDemo\obj\Debug\TempPE\
     文件         966  2016-08-03 10:31  WaterImageDemo\obj\Debug\WaterImageDemo.csproj.FileListAbsolute.txt
     文件         977  2016-08-03 10:39  WaterImageDemo\obj\Debug\WaterImageDemo.csproj.GenerateResource.Cache
     文件        2211  2016-08-03 09:48  WaterImageDemo\obj\Debug\WaterImageDemo.csprojResolveAssemblyReference.cache
     文件       16384  2016-08-03 10:39  WaterImageDemo\obj\Debug\WaterImageDemo.exe
     文件         180  2016-08-03 10:39  WaterImageDemo\obj\Debug\WaterImageDemo.Form1.resources
     文件       36352  2016-08-03 10:39  WaterImageDemo\obj\Debug\WaterImageDemo.pdb
     文件         180  2016-08-03 09:48  WaterImageDemo\obj\Debug\WaterImageDemo.Properties.Resources.resources
     文件         495  2016-08-03 09:10  WaterImageDemo\Program.cs
     目录           0  2016-08-03 09:10  WaterImageDemo\Properties\
     文件        1352  2016-08-03 09:10  WaterImageDemo\Properties\AssemblyInfo.cs
     文件        2880  2016-08-03 09:10  WaterImageDemo\Properties\Resources.Designer.cs
     文件        5612  2016-08-03 09:10  WaterImageDemo\Properties\Resources.resx
     文件        1101  2016-08-03 09:10  WaterImageDemo\Properties\Settings.Designer.cs
     文件         249  2016-08-03 09:10  WaterImageDemo\Properties\Settings.settings
............此处省略3个文件信息