c# 给图片添加文字水印 实例源码下载

【实例截图】

【核心代码】

using System;
using System.Diagnostics;
using System.Drawing;
using System.Threading;
using System.Windows.Forms;
using GenerateImage.Utilities;

namespace GenerateImage
{
    public partial class Form1 : Form
    {
        private AutoGenImageRequire autoGenImageRequire = new AutoGenImageRequire();
        private BatchModImageRequire batchModImageRequire = new BatchModImageRequire();
        private ImageRequire imageRequire = null;
        private const string LabelAutoGenSettings = "Auto Generate Image Settings:";
        private const string LabelBatchModSettings = "Batch Modify Image Settings:";

        private Thread workThread = null;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.lblPropertyGrid.Text = LabelAutoGenSettings;
            this.propertyGrid1.SelectedObject = autoGenImageRequire;
            this.propertyGrid1.PropertyValueChanged  = propertyGrid1_PropertyValueChanged;
            this.rtnAutoGen.CheckedChanged  = radioButton_CheckedChanged;
        }

        private void radioButton_CheckedChanged(object sender, EventArgs e)
        {
            if (!rtnAutoGen.Enabled || !rtnBatchModify.Enabled)
                return;

            if (rtnAutoGen.Checked)
            {
                this.propertyGrid1.SelectedObject = autoGenImageRequire;
                this.lblPropertyGrid.Text = LabelAutoGenSettings;
                this.pictureBox1.BackgroundImage = null;
            }
            else
            {
                this.propertyGrid1.SelectedObject = batchModImageRequire;
                this.lblPropertyGrid.Text = LabelBatchModSettings;
                this.pictureBox1.BackgroundImage = null;
            }
        }

        private void propertyGrid1_PropertyValueChanged(object s, PropertyValueChangedEventArgs e)
        {
            if (!this.propertyGrid1.Enabled)
                return;

            switch(e.ChangedItem.Label)
            {
                case "SourceImageFileName":
                    string filename = e.ChangedItem.Value.ToString();
                    if (string.IsNullOrEmpty(filename))
                        this.pictureBox1.BackgroundImage = null;
                    else
                    {
                        if (System.IO.File.Exists(filename))
                        {
                            this.pictureBox1.BackgroundImage = Image.FromFile(filename);
                            this.autoGenImageRequire.ImageFormat = this.pictureBox1.BackgroundImage.RawFormat;
                        }
                        else
                            this.pictureBox1.BackgroundImage = null;
                    }
                    break;
                default:
                    break;
            }
        }

        private void btnPreview_Click(object sender, EventArgs e)
        {
            try
            {
                ValidateAutoGenImageRequire(autoGenImageRequire);
                this.pictureBox1.BackgroundImage = ImageUtils.GenerateImageForPreview(autoGenImageRequire);
            }
            catch(InputError err)
            {
                MessageBox.Show(err.Message);
                SetPropertyFocus(err.Label);
            }
        }

        private void btnGenerate_Click(object sender, EventArgs e)
        {
            try
            {
                if (rtnAutoGen.Checked)
                {
                    ValidateAutoGenImageRequire(autoGenImageRequire);
                    this.pictureBox1.BackgroundImage = ImageUtils.GenerateImageForPreview(autoGenImageRequire);
                }
                else
                {
                    ValidateBatchModImageRequire(batchModImageRequire);
                }

                workThread = new Thread(GenerateImages);
                workThread.Start();
                SetControlEnabled(true);
            }
            catch (InputError err)
            {
                MessageBox.Show(err.Message);
                SetPropertyFocus(err.Label);
            }
        }

        private void btnOpenFolder_Click(object sender, EventArgs e)
        {
            string folder = null;
            if (rtnAutoGen.Checked)
                folder = autoGenImageRequire.SaveAsFolderName;
            else
                folder = batchModImageRequire.SaveAsFolderName;

            if (string.IsNullOrEmpty(folder))
                return;

            Process.Start("Explorer.exe", "\""   folder   "\"");
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (workThread == null)
                SetControlEnabled(false);

            if (!workThread.Join(1))
            {
                this.toolStripProgressBar1.Value = ImageUtils.CurrentNumber * 100 / ImageUtils.TotalNumber;
                this.tslImageName.Text = ImageUtils.CurrentFileName;
            }
            else
            {
                this.toolStripProgressBar1.Value = 100;
                this.tslImageName.Text = ImageUtils.CurrentFileName;
                SetControlEnabled(false);
            }
        }

        private void GenerateImages()
        {
            if (rtnAutoGen.Checked)
                ImageUtils.GenerateImages(this.autoGenImageRequire);
            else
                ImageUtils.GenerateImages(this.batchModImageRequire);
        }

        private void SetControlEnabled(bool busy)
        {
            if (busy)
            {
                timer1.Enabled = true;
                tslStatus.Text = "Generating";
                btnGenerate.Enabled = false;
                btnPreview.Enabled = false;
                btnOpenFolder.Enabled = false;
                rtnAutoGen.Enabled = false;
                rtnBatchModify.Enabled = false;
                propertyGrid1.Enabled = false;
                toolStripProgressBar1.Value = 0;
            }
            else
            {
                timer1.Enabled = false;
                tslStatus.Text = "Completed";
                btnGenerate.Enabled = true;
                btnPreview.Enabled = true;
                btnOpenFolder.Enabled = true;
                rtnAutoGen.Enabled = true;
                rtnBatchModify.Enabled = true;
                propertyGrid1.Enabled = true;
                //toolStripProgressBar1.Value = 0;
            }
        }

        private void SetPropertyFocus(string label)
        {
            GridItem item = this.propertyGrid1.SelectedGridItem.Parent;
            foreach (GridItem p in item.GridItems)
            {
                if (p.Label == label)
                {
                    this.propertyGrid1.Focus();
                    p.Select();
                    return;
                }
            }
        }

        private void ValidateCommonImageRequire(ImageRequire imageReq)
        {
            if (imageReq.AddTextFont == null)
                throw new InputError("AddTextFont is required.", "AddTextFont");

            if (!System.IO.Directory.Exists(imageReq.SaveAsFolderName))
                throw new InputError("SaveAsFolder is not exist.", "SaveAsFolderName");
        }

        private void ValidateAutoGenImageRequire(AutoGenImageRequire imageReq)
        {
            if (imageReq.GenerateNumber > 3000 || imageReq.GenerateNumber < 1)
                throw new InputError("GenerateNumber must be in the range(0, 3000).", "GenerateNumber");

            if (string.IsNullOrEmpty(imageReq.SourceImageFileName))
                throw new InputError("SourceImageFileName is required.", "SourceImageFileName");

            if (!System.IO.File.Exists(imageReq.SourceImageFileName))
                throw new InputError("SourceImageFileName is not exist.", "SourceImageFileName");

            ValidateCommonImageRequire(imageReq);
        }

        private void ValidateBatchModImageRequire(BatchModImageRequire imageReq)
        {
            if (string.IsNullOrEmpty(imageReq.SourceFolderName))
                throw new InputError("SourceFolderName is required.", "SourceFolderName");

            ValidateCommonImageRequire(imageReq);
        }
    }
}