应用DEV第三方界面控件制作批量添加水印程序

本次应用DevExpress和C#语言制作了一个批量添加水印的程序，看界面效果图：

界面中既可以进行文字水印添加，也可以图片水印添加，同时还可以对水印的位置进行设置，比较实用！

文字水印的具体添加情况，看图：

还可以文字的预览：

整个文字水印的预览：

同时图片的水印预览：

最后显示下图片的水印效果：

核心代码部分：

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

namespace 添加水印_程序
{
    public partial class Form1 : DevExpress.XtraEditors.XtraForm
    {
        public Form1()
        {
            InitializeComponent();
        }

        #region 获取系统字体
        private void GetSystemFont(ToolStripComboBox cb)
        {
            InstalledFontCollection myFont = new InstalledFontCollection();
            foreach (FontFamily ff in myFont.Families)
            {
                cb.Items.Add(ff.Name);
            }
            cb.SelectedItem = "宋体";
        }
        #endregion

        private void Form1_Load(object sender, EventArgs e)
        {
            cbbPosition.SelectedIndex = 1;
        }

        string[] ImgArray = null;
        string ImgDirectoryPath = null;

        private void simpleButton4_Click(object sender, EventArgs e)
        {
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                lbImgList.Items.Clear();
                ImgArray = openFileDialog1.FileNames;

                string ImgP = ImgArray[0].ToString();
                
                ImgP = ImgP.Remove(ImgP.LastIndexOf("\"));
                
                ImgDirectoryPath = ImgP;
                for (int i = 0; i < ImgArray.Length; i++)
                {
                    string ImgPath = ImgArray[i].ToString();
                    
                    string ImgName = ImgPath.Substring(ImgPath.LastIndexOf("\") + 1, ImgPath.Length - ImgPath.LastIndexOf("\") - 1);
                    //MessageBox.Show(ImgName);
                    lbImgList.Items.Add(ImgName);
                }
                tsslStatus.Text = "图片总数：" + lbImgList.Items.Count;
            }
        }

        private void listBoxControl1_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (lbImgList.SelectedItems.Count > 0)
            {
               tsslText.Text = "图片位置：" + ImgDirectoryPath + "\" + lbImgList.SelectedItems[0].ToString();
            }
        }
        private void btnPreview_Click(object sender, EventArgs e)
        {
            if (lbImgList.Items.Count > 0)
            {
                if (rbTxt.Checked)
                {
                    if (txtWaterMarkFont.Text != "" && txtSavaPath.Text.Trim() != "")
                    {
                        AddFontWatermark(txtWaterMarkFont.Text.Trim(), lbImgList.Items[0].ToString(), 0);
                        Frm_Browser frm2 = new Frm_Browser();
                        frm2.ig = BigBt;
                        frm2.ShowDialog();
                    }
                }
                else
                {
                    if (txtWaterMarkImg.Text != "" && txtSavaPath.Text != "")
                    {
                        ChangeAlpha();
                        AddFontWatermark(txtWaterMarkFont.Text.Trim(), lbImgList.Items[0].ToString(), 2);
                        Frm_Browser frm2 = new Frm_Browser();
                        frm2.ig = BigBt;
                        frm2.ShowDialog();
                    }
                }
            }
        }
        private void trackBar1_Enter(object sender, EventArgs e)
        {
            lbImgList.Focus();
        }
        private void btnSelect_Click(object sender, EventArgs e)
        {

            if (openFileDialog2.ShowDialog() == DialogResult.OK)
            {
                txtWaterMarkImg.Text = openFileDialog2.FileName;
                //MessageBox.Show(txtWaterMarkImg.Text);
               

                if (rbPIC.Checked == true)
                {
                    ChangeAlpha();
                    pbImgPreview.Image = Image.FromFile(txtWaterMarkImg.Text.Trim());
                }
            }

        }
        private void rbTxt_CheckedChanged(object sender, EventArgs e)
        {
            trackBar1.Enabled = false;
            if (rbPIC.Checked)
                pbImgPreview.Image = null;
        }

        private void rbPIC_CheckedChanged(object sender, EventArgs e)
        {
            trackBar1.Enabled = true;
            if (rbTxt.Checked)
            {

                pbImgPreview.Image = null;

            }
        }
     private void txtWaterMarkFont_TextChanged(object sender, EventArgs e)
        {
            if (lbImgList.Items.Count <= 0)
            {
                MessageBox.Show("请加载图片", "警告", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            else
            {
                AddFontWatermark(txtWaterMarkFont.Text.Trim(), lbImgList.Items[0].ToString(), 0);
                pbImgPreview.Image = bt;
            }

        }

        private void simpleButton7_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        Bitmap effect;
        Bitmap source;
        Image new_img;

        private void ChangeAlpha()
        {
            pbImgPreview.Refresh();
            source = new Bitmap(Image.FromFile(txtWaterMarkImg.Text.Trim()));
            if (source.Width <= 368)
                effect = new Bitmap(368, 75);
            else
            {
                Image.GetThumbnailImageAbort callb = null;
                //对水印图片生成缩略图,缩小到原图得1/4
                new_img = source.GetThumbnailImage(source.Width / 4, source.Width / 4, callb, new System.IntPtr());
                effect = new Bitmap(this.new_img.Width, this.new_img.Height);
            }
            Graphics _effect = Graphics.FromImage(effect);
            float[][] matrixItems ={
                                      new float[]{1,0,0,0,0},
                                      new float [] {0,1,0,0,0},
                                      new float []{0,0,1,0,0},
                                      new float []{0,0,0,0,0},
                                      new float[]{0,0,0,trackBar1.Value/255f,1}
                                   };

            ColorMatrix imgMatrix = new ColorMatrix(matrixItems);
            ImageAttributes imgEffect = new ImageAttributes();
            imgEffect.SetColorMatrix(imgMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
            if (source.Width <= 368)
            {
                _effect.DrawImage(source, new Rectangle(0, 0, 368, 75), 0, 0, 368, 75, GraphicsUnit.Pixel, imgEffect);
            }
            else
            {
                _effect.DrawImage(new_img, new Rectangle(0, 0, new_img.Width, new_img.Height), 0, 0, new_img.Width, new_img.Height, GraphicsUnit.Pixel, imgEffect);
            }
            pbImgPreview.Image = effect;
        }



        private void trackBar1_ValueChanged(object sender, EventArgs e)
        {
            if (rbPIC.Checked && txtWaterMarkImg.Text.Trim() != "")
                ChangeAlpha();
        }
        private void btnPerform_Click(object sender, EventArgs e)
        {
            if (rbTxt.Checked && txtSavaPath.Text != "" && txtWaterMarkFont.Text != "")
            {
                for (int i = 0; i < lbImgList.Items.Count; i++)
                {
                    AddFontWatermark(txtWaterMarkFont.Text.Trim(), lbImgList.Items[i].ToString(), 1);
                }
                MessageBox.Show("添加水印成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            }
            if (rbPIC.Checked && txtSavaPath.Text != "" && pbImgPreview.Image != null)
            {
                for (int i = 0; i < lbImgList.Items.Count; i++)
                {
                    AddFontWatermark(txtWaterMarkFont.Text.Trim(), lbImgList.Items[i].ToString(), 3);
                }
                MessageBox.Show("添加水印成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            }

        }
        string NewFolderPath;

        private void button2_Click(object sender, EventArgs e)
        {

            if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
            {
                txtSavaPath.Text = folderBrowserDialog1.SelectedPath;
                NewFolderPath = txtSavaPath.Text.Trim();
            }
        }

有兴趣的可自己尝试下！！！