Winform中实现对照片添加文字和图片水印(附代码下载)

小鱼儿 2023-10-07 04:55 41阅读 0赞

## 场景 ##

### 项目运行效果 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70][]

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## 实现 ##

新建一个窗体页面，设计页面布局如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1][]

其中图片列表是ListBox,透明度设置是TrackBar,水印位置是ComboBox,下面窗口是PictureBox。

首先加载图片按钮的点击事件中

private void btnLoadImg_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);
                        lbImgList.Items.Add(ImgName);
                    }
                    tsslStatus.Text = "图片总数：" + lbImgList.Items.Count;
                }
            }

预览按钮的点击事件中，需要显示预览页面，首先新建一个预览页面Form2,页面上放一个PictureBox

using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;
    
    namespace IMGwatermark
    {
        public partial class Form2 : Form
        {
            public Form2()
            {
                InitializeComponent();
            }
            public Image ig = null;
            private void Form2_Load(object sender, EventArgs e)
            {
                pictureBox1.Image = ig;
            }
        }
    }

在预览按钮的点击事件中

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);
                            Form2 frm2 = new Form2();
                            frm2.ig = BigBt;
                            frm2.ShowDialog();
                        }
                    }
                    else
                    {
                        if (txtWaterMarkImg.Text != "" && txtSavaPath.Text != "")
                        {
                            ChangeAlpha();
                            AddFontWatermark(txtWaterMarkFont.Text.Trim(), lbImgList.Items[0].ToString(), 2);
                            Form2 frm2 = new Form2();
                            frm2.ig = BigBt;
                            frm2.ShowDialog();
                        }
                    }
                }
            }

在字体设置的点击事件中

private void button1_Click(object sender, EventArgs e)
            {
                if (lbImgList.Items.Count > 0)
                {
                    fontDialog1.ShowColor = true;
                    fontDialog1.ShowHelp = false;
                    fontDialog1.ShowApply = false;
                    if (fontDialog1.ShowDialog() == DialogResult.OK)
                    {
                        FontF = fontDialog1.Font.FontFamily;
                        fontColor = fontDialog1.Color;
                        fontSize = fontDialog1.Font.Size;
                        fontStyle = fontDialog1.Font.Style;
                        AddFontWatermark(txtWaterMarkFont.Text.Trim(), lbImgList.Items[0].ToString(), 0);
                        pbImgPreview.Image = bt;
                    }
                }
            }

开始执行的点击事件中

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);
                }
            }

完整示例代码

using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;
    using System.IO;
    using System.Drawing.Text;
    using System.Drawing.Imaging;
    namespace IMGwatermark
    {
        public partial class Form1 : Form
        {
            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 = 0;
            }
    
            string [] ImgArray=null;
            string ImgDirectoryPath=null;
           
            private void btnLoadImg_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);
                        lbImgList.Items.Add(ImgName);
                    }
                    tsslStatus.Text = "图片总数：" + lbImgList.Items.Count;
                }
            }
    
            private void lbImgList_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);
                            Form2 frm2 = new Form2();
                            frm2.ig = BigBt;
                            frm2.ShowDialog();
                        }
                    }
                    else
                    {
                        if (txtWaterMarkImg.Text != "" && txtSavaPath.Text != "")
                        {
                            ChangeAlpha();
                            AddFontWatermark(txtWaterMarkFont.Text.Trim(), lbImgList.Items[0].ToString(), 2);
                            Form2 frm2 = new Form2();
                            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;
                    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 button1_Click(object sender, EventArgs e)
            {
                if (lbImgList.Items.Count > 0)
                {
                    fontDialog1.ShowColor = true;
                    fontDialog1.ShowHelp = false;
                    fontDialog1.ShowApply = false;
                    if (fontDialog1.ShowDialog() == DialogResult.OK)
                    {
                        FontF = fontDialog1.Font.FontFamily;
                        fontColor = fontDialog1.Color;
                        fontSize = fontDialog1.Font.Size;
                        fontStyle = fontDialog1.Font.Style;
                        AddFontWatermark(txtWaterMarkFont.Text.Trim(), lbImgList.Items[0].ToString(), 0);
                        pbImgPreview.Image = bt;
                    }
                }
            }
    
            Bitmap bt=null;
            float fontSize = 8;
            Color fontColor=Color.Black;
            FontFamily FontF = null;
            FontStyle fontStyle = FontStyle.Regular;
            int Fwidth;
            int Fheight;
            Bitmap BigBt;
            Font f;
            Brush b;
            private void AddFontWatermark(string txt,string Iname,int i)//预览
            {
                b = new SolidBrush(fontColor);
                bt = new Bitmap(368,75);
                BigBt = new Bitmap(Image.FromFile(ImgDirectoryPath + "\\" +Iname));
                Graphics g = Graphics.FromImage(bt);
                Graphics g1 = Graphics.FromImage(BigBt);
                g.Clear(Color.Gainsboro);
                pbImgPreview.Image = bt;
                if (FontF == null)
                {
                    f = new Font(txt,fontSize);
                    SizeF XMaxSize = g.MeasureString(txt, f);
                    Fwidth = (int)XMaxSize.Width;
                    Fheight = (int)XMaxSize.Height;
                    g.DrawString(txt,f, b, (int)(368 - Fwidth) / 2, (int)(75 - Fheight) / 2);
                    if (cbbPosition.SelectedIndex==0)//正中
                    {
                        g1.DrawString(txt, f, b, (int)(BigBt.Width - Fwidth) / 2, (int)(BigBt.Height - Fheight) / 2);
                    }
                    if (cbbPosition.SelectedIndex == 1)//左上
                    {
                        g1.DrawString(txt, f, b, 30,30);
                    }
                    if (cbbPosition.SelectedIndex ==2)//左下
                    {
                        g1.DrawString(txt, f, b, 30, (int)(BigBt.Height - Fheight)-30);
                    }
                    if (cbbPosition.SelectedIndex == 3) //右上
                    {
                        g1.DrawString(txt, f, b, (int)(BigBt.Width - Fwidth), 30);
                    }
                    if (cbbPosition.SelectedIndex == 4)//右下
                    {
                        g1.DrawString(txt, f, b, (int)(BigBt.Width - Fwidth), (int)(BigBt.Height - Fheight)-30);
                    }
                }
                else
                {
                    f = new Font(FontF, fontSize, fontStyle);
                    SizeF XMaxSize = g.MeasureString(txt, f);
                    Fwidth = (int)XMaxSize.Width;
                    Fheight = (int)XMaxSize.Height;
                    g.DrawString(txt, new Font(FontF, fontSize, fontStyle), b, (int)(368 - Fwidth) / 2, (int)(75 - Fheight) / 2);
                    if (cbbPosition.SelectedIndex == 0)//正中
                    {
                        g1.DrawString(txt, new Font(FontF, fontSize, fontStyle), b, (int)(BigBt.Width - Fwidth) / 2, (int)(BigBt.Height - Fheight) / 2);
                    }
                    if (cbbPosition.SelectedIndex == 1)//左上
                    {
                        g1.DrawString(txt, new Font(FontF, fontSize, fontStyle), b, 30, 30);
                    }
                    if (cbbPosition.SelectedIndex == 2)//左下
                    {
                        g1.DrawString(txt, new Font(FontF, fontSize, fontStyle), b, 30, (int)(BigBt.Height - Fheight)-30);
                    }
                    if (cbbPosition.SelectedIndex == 3) //右上
                    {
                        g1.DrawString(txt, new Font(FontF, fontSize, fontStyle), b, (int)(BigBt.Width - Fwidth), Fheight);
                    }
                    if (cbbPosition.SelectedIndex == 4)//右下
                    {
                        g1.DrawString(txt, new Font(FontF, fontSize, fontStyle), b, (int)(BigBt.Width - Fwidth), (int)(BigBt.Height - Fheight)-30);
                    }
                }
                if (i == 1)
                {
                    string ipath;
                    if (NewFolderPath.Length == 3)
                        ipath = NewFolderPath.Remove(NewFolderPath.LastIndexOf(":") + 1);
                    else
                        ipath = NewFolderPath;
                    string imgstype = Iname.Substring(Iname.LastIndexOf(".") + 1, Iname.Length - 1 - Iname.LastIndexOf("."));
                    if (imgstype.ToLower() == "jpeg" || imgstype.ToLower() == "jpg")
                    {
                        BigBt.Save(ipath + "\\_" + Iname, ImageFormat.Jpeg);
                    }
                    if (imgstype.ToLower() == "png")
                    {
                        BigBt.Save(ipath + "\\_" + Iname, ImageFormat.Png);
                    }
                    if (imgstype.ToLower() == "bmp")
                    {
                        BigBt.Save(ipath + "\\_" + Iname, ImageFormat.Bmp);
                    }
                    if (imgstype.ToLower() == "gif")
                    {
                        BigBt.Save(ipath + "\\_" + Iname, ImageFormat.Gif);
                    }
                    g1.Dispose();
                    BigBt.Dispose();
                }
                if (i == 2)
                {
                    if (cbbPosition.SelectedIndex == 0)//正中
                    {
                        g1.DrawImage(effect, (int)(BigBt.Width - effect.Width) / 2, (int)(BigBt.Height - effect.Height) / 2);
                    }
                    if (cbbPosition.SelectedIndex == 1)//左上
                    {
                        g1.DrawImage(effect, 30, 30);
                    }
                    if (cbbPosition.SelectedIndex == 2)//左下
                    {
                        g1.DrawImage(effect, 30, (int)(BigBt.Height - effect.Height) - 30);
                    }
                    if (cbbPosition.SelectedIndex == 3) //右上
                    {
                        g1.DrawImage(effect, (int)(BigBt.Width - effect.Width)-30, 30);
                    }
                    if (cbbPosition.SelectedIndex == 4)//右下
                    {
                        g1.DrawImage(effect, (int)(BigBt.Width - effect.Width)-30, (int)(BigBt.Height - effect.Height) - 30);
                    }
                }
                if (i == 3)
                {
                    if (cbbPosition.SelectedIndex == 0)//正中
                    {
                        g1.DrawImage(effect, (int)(BigBt.Width - effect.Width) / 2, (int)(BigBt.Height - effect.Height) / 2);
                    }
                    if (cbbPosition.SelectedIndex == 1)//左上
                    {
                        g1.DrawImage(effect, 30, 30);
                    }
                    if (cbbPosition.SelectedIndex == 2)//左下
                    {
                        g1.DrawImage(effect, 30, (int)(BigBt.Height - effect.Height) - 30);
                    }
                    if (cbbPosition.SelectedIndex == 3) //右上
                    {
                        g1.DrawImage(effect, (int)(BigBt.Width - effect.Width), 30);
                    }
                    if (cbbPosition.SelectedIndex == 4)//右下
                    {
                        g1.DrawImage(effect, (int)(BigBt.Width - effect.Width), (int)(BigBt.Height - effect.Height) - 30);
                    }
                    string ipath;
                    if (NewFolderPath.Length == 3)
                        ipath = NewFolderPath.Remove(NewFolderPath.LastIndexOf(":") + 1);
                    else
                        ipath = NewFolderPath;
                    string imgstype = Iname.Substring(Iname.LastIndexOf(".") + 1, Iname.Length - 1 - Iname.LastIndexOf("."));
                    if (imgstype.ToLower() == "jpeg" || imgstype.ToLower() == "jpg")
                    {
                        BigBt.Save(ipath + "\\_" + Iname, ImageFormat.Jpeg);
                    }
                    if (imgstype.ToLower() == "png")
                    {
                        BigBt.Save(ipath + "\\_" + Iname, ImageFormat.Png);
                    }
                    if (imgstype.ToLower() == "bmp")
                    {
                        BigBt.Save(ipath + "\\_" + Iname, ImageFormat.Bmp);
                    }
                    if (imgstype.ToLower() == "gif")
                    {
                        BigBt.Save(ipath + "\\_" + Iname, ImageFormat.Gif);
                    }
                }
            }
          
            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 btnExit_Click(object sender, EventArgs e)
            {
                Application.Exit();
            }
    
            /// <summary>
            /// 调节透明度
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            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();
                }
            }
    
        }
    }

### 代码下载 ###

[https://download.csdn.net/download/BADAO\_LIUMANG\_QIZHI/12241196][https_download.csdn.net_download_BADAO_LIUMANG_QIZHI_12241196]

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[https_blog.csdn.net_badao_liumang_qizhi]: https://blog.csdn.net/badao_liumang_qizhi
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[https_download.csdn.net_download_BADAO_LIUMANG_QIZHI_12241196]: https://download.csdn.net/download/BADAO_LIUMANG_QIZHI/12241196