add text to pic-优快云博客

本文链接：https://blog.youkuaiyun.com/jojozhuang/article/details/1388540

本文介绍了一个使用 C# 开发的图片批处理应用程序，该应用能够在选定的图片上添加文字水印，并批量处理文件夹内的所有图片。用户可以自定义文字内容、字体样式、颜色、位置等属性。

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using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.IO;

using System.Drawing.Imaging;

namespace StudySampleCSharp

{

/// <summary>

/// Form1 の概要の説明です。

/// </summary>

public class Form1 : System.Windows.Forms.Form

{

private System.Windows.Forms.Label label1;

private System.Windows.Forms.Label label2;

private System.Windows.Forms.TextBox txtLogo;

/// <summary>

/// 必要なデザイナ変数です。

/// </summary>

private System.ComponentModel.Container components = null;

private System.Windows.Forms.Button btnForeColor;

private System.Windows.Forms.Button btnBackColor;

private System.Windows.Forms.Button btnFonts;

private System.Windows.Forms.ComboBox cmbPosition;

private System.Windows.Forms.Button btnExcute;

private System.Windows.Forms.ListBox listBoxFile;

private System.Windows.Forms.Button btnSource;

private System.Windows.Forms.Button btnDestination;

private System.Windows.Forms.TextBox txtDestination;

private System.Windows.Forms.TextBox txtSource;

private Font titleFont = new Font("MS UI Gothic",9);

private Color foreColor = Color.White;

private System.Windows.Forms.Label lblDemo;

private System.Windows.Forms.PictureBox pictureBoxDemo;

private System.Windows.Forms.TextBox textBox1;

private System.Windows.Forms.TextBox textBox2;

private Color backColor = Color.Transparent;

public Form1()

{

// Windows フォームデザイナサポートに必要です。

InitializeComponent();

// TODO: InitializeComponent 呼び出しの後に、コンストラクタコードを追加してください。

}

/// <summary>

/// 使用されているリソースに後処理を実行します。

/// </summary>

protected override void Dispose( bool disposing )

{

if( disposing )

{

if (components != null)

{

components.Dispose();

}

base.Dispose( disposing );

}

Windows フォームデザイナで生成されたコード

/// <summary>

/// アプリケーションのメインエントリポイントです。

/// </summary>

[STAThread]

static void Main()

{

Application.Run(new Form1());

}

private void Form1_Load(object sender, System.EventArgs e)

{

cmbPosition.Items.Add("TopLeft");

cmbPosition.Items.Add("TopRight");

cmbPosition.Items.Add("MiddleCenter");

cmbPosition.Items.Add("BottomLeft");

cmbPosition.Items.Add("BottomRight");

cmbPosition.SelectedIndex = 3;

txtDestination.Text = @"C:Documents and Settings84デスクトップpic";

Demo();

}

private void btnSource_Click(object sender, System.EventArgs e)

{

string strFileName = "";

OpenFileDialog fDlg = new OpenFileDialog();

fDlg.Multiselect = true;

if (fDlg.ShowDialog() != DialogResult.OK)

{

return;

}

strFileName = fDlg.FileNames[0].ToString();

txtSource.Text = strFileName.Substring(0,strFileName.LastIndexOf("/"));

for(int ix=0; ix < fDlg.FileNames.Length; ix++)

{

strFileName = fDlg.FileNames[ix].ToString();

strFileName = strFileName.Substring(strFileName.LastIndexOf("/") + 1);

listBoxFile.Items.Add(strFileName);

}

fDlg.Dispose();

}

private void btnDestination_Click(object sender, System.EventArgs e)

{

FolderBrowserDialog foldDlg = new FolderBrowserDialog();

if (foldDlg.ShowDialog() != DialogResult.OK)

{

return;

}

txtDestination.Text = foldDlg.SelectedPath;

}

private void listBoxFile_SelectedIndexChanged(object sender, System.EventArgs e)

{

string strFilePath;

if (listBoxFile.SelectedIndex < 0)

{

return;

}

strFilePath = txtSource.Text + "/" + listBoxFile.Items[listBoxFile.SelectedIndex];

if (File.Exists(strFilePath))

{

Image img = Image.FromFile(strFilePath);

pictureBoxDemo.Image = img;

img.Dispose();

}

private void btnFonts_Click(object sender, System.EventArgs e)

{

FontDialog fontDlg = new FontDialog();

fontDlg.Font = titleFont;

if (fontDlg.ShowDialog()!= DialogResult.OK)

{

return;

}

titleFont = fontDlg.Font;

fontDlg.Dispose();

Demo();

}

private void btnForeColor_Click(object sender, System.EventArgs e)

{

ColorDialog colorDlg = new ColorDialog();

colorDlg.Color = foreColor;

if (colorDlg.ShowDialog()!= DialogResult.OK)

{

return;

}

foreColor = colorDlg.Color;

colorDlg.Dispose();

Demo();

}

private void btnBackColor_Click(object sender, System.EventArgs e)

{

ColorDialog colorDlg = new ColorDialog();

colorDlg.Color = backColor;

if (colorDlg.ShowDialog()!= DialogResult.OK)

{

return;

}

backColor = colorDlg.Color;

colorDlg.Dispose();

Demo();

}

private void btnExcute_Click(object sender, System.EventArgs e)

{

string strLogoTitle = txtLogo.Text;

if (strLogoTitle == string.Empty)

{

MessageBox.Show("The LogoTitle can't be empty!");

txtLogo.Focus();

return;

}

if (listBoxFile.Items.Count < 1)

{

MessageBox.Show("Please set the files that you want to add title to!");

return;

}

if (txtDestination.Text == string.Empty)

{

MessageBox.Show("Please set the destination fold that you want to save the images!");

return;

}

string fileName = "";

string FILE_NAME = "";

System.Drawing.Image image;

Bitmap bitmap;

Graphics g;

float rectX;

float rectY;

float rectWidth = strLogoTitle.Length*(titleFont.Size+8);

float rectHeight = titleFont.Size+8;

Brush frontBrush = new SolidBrush(foreColor);

Brush backBrush = new SolidBrush(backColor);

for (int ix = 0; ix < listBoxFile.Items.Count; ix++)

{

fileName = txtSource.Text + "/";

fileName = fileName + listBoxFile.Items[ix].ToString();

if(!File.Exists(fileName))

{

continue;

}

image = System.Drawing.Image.FromFile(fileName);

bitmap = new Bitmap(image,image.Width,image.Height);

g = Graphics.FromImage(bitmap);

switch(cmbPosition.SelectedIndex)

{

case 0:

rectX = 0;

rectY = 0;

break;

case 1:

rectX = image.Width - titleFont.Size * txtLogo.Text.Length;

rectY = 0;

break;

case 2:

rectX = image.Width / 2;

rectY = image.Height / 2;

break;

case 3:

rectX = 0;

rectY = image.Height - titleFont.Size;

break;

case 4:

rectX = image.Width - titleFont.Size * txtLogo.Text.Length;

rectY = image.Height - titleFont.Size;

break;

default:

rectX = 0;

rectY = image.Height - titleFont.Size;

break;

}

RectangleF textArea = new RectangleF(rectX,rectY,rectWidth,rectHeight);

g.FillRectangle(backBrush,rectX,rectY,rectWidth,rectHeight);

g.DrawString(strLogoTitle,titleFont,frontBrush,textArea);

FILE_NAME = txtDestination.Text + "/";

FILE_NAME = FILE_NAME + listBoxFile.Items[ix].ToString();

bitmap.Save(FILE_NAME,ImageFormat.Jpeg);

g.Dispose();

bitmap.Dispose();

image.Dispose();

}

MessageBox.Show("complete!");

}

private void Demo()

{

int iGood = 2;

lblDemo.Text = txtLogo.Text;

lblDemo.Width = 100;

lblDemo.Height = 24;

lblDemo.BackColor = backColor;

lblDemo.ForeColor = foreColor;

lblDemo.Font = titleFont;

switch(cmbPosition.SelectedIndex)

{

case 0:

lblDemo.Left = pictureBoxDemo.Left + iGood;

lblDemo.Top = pictureBoxDemo.Top + iGood;

break;

case 1:

lblDemo.Left = pictureBoxDemo.Left + pictureBoxDemo.Width - lblDemo.Width - iGood;

lblDemo.Top = pictureBoxDemo.Top + iGood;

break;

case 2:

lblDemo.Left = pictureBoxDemo.Left + pictureBoxDemo.Width / 2 - lblDemo.Width / 2;

lblDemo.Top = pictureBoxDemo.Top + pictureBoxDemo.Height / 2 - lblDemo.Height / 2;

break;

case 3:

lblDemo.Left = pictureBoxDemo.Left + iGood;

lblDemo.Top = pictureBoxDemo.Top + pictureBoxDemo.Height - lblDemo.Height - iGood;

break;

case 4:

lblDemo.Left = pictureBoxDemo.Left + pictureBoxDemo.Width - lblDemo.Width - iGood;

lblDemo.Top = pictureBoxDemo.Top + pictureBoxDemo.Height - lblDemo.Height - iGood;

break;

default:

lblDemo.Left = pictureBoxDemo.Left + iGood;

lblDemo.Top = pictureBoxDemo.Top + pictureBoxDemo.Height - lblDemo.Height - iGood;

break;

}

private void cmbPosition_SelectedIndexChanged(object sender, System.EventArgs e)

{

Demo();

}

private void txtLogo_Validating(object sender, System.ComponentModel.CancelEventArgs e)

{

Demo();

}