C#實現封面圖片生成器的示例代碼
這個東西我已經用瞭有段時間瞭,從開始寫文章就在用這個,主要原因還是因為我比較懶。懶得去尋找圖片,同時又怕萬一惹來版權爭議。。。
跟我所有的文章的封面圖一樣,一個純色背景加上文字自動生成一個指定大小的圖片。
代碼實現也比較簡單,如果有興趣的話,可以自己擴展,比如自定義背景圖,自定義水印等。
實現功能
利用C#做一個簡單的封面圖片生成器
開發環境
開發工具: Visual Studio 2013
.NET Framework版本:4.5
實現代碼
private void Img_Load(object sender, EventArgs e) { init(); } private void btnBg_Click(object sender, EventArgs e) { ColorDialog cd = new ColorDialog(); if (cd.ShowDialog() == DialogResult.OK) { panelBgColor.BackColor = cd.Color; } } private void btnFontColor1_Click(object sender, EventArgs e) { ColorDialog cd = new ColorDialog(); if (cd.ShowDialog() == DialogResult.OK) { panelFontColor1.BackColor = cd.Color; } } private void btnFontColor2_Click(object sender, EventArgs e) { ColorDialog cd = new ColorDialog(); if (cd.ShowDialog() == DialogResult.OK) { panelFontColor2.BackColor = cd.Color; } } private void btnFont_Click(object sender, EventArgs e) { FontDialog fd = new FontDialog(); fd.Font = txtFont.Font; if (fd.ShowDialog() == DialogResult.OK) { txtFont.Font = fd.Font; } } private void btnPre_Click(object sender, EventArgs e) { if (string.IsNullOrWhiteSpace(txtWord.Text)) { MessageBox.Show("請先設置文字", "提示"); return; } MemoryStream stream = new MemoryStream(CreateIamge(txtWord.Text)); pictureBox1.Image = Image.FromStream(stream, true); } private void btnSave_Click(object sender, EventArgs e) { if (pictureBox1.Image == null) { MessageBox.Show("請先預覽", "提示"); return; } SaveFileDialog sfd = new SaveFileDialog(); sfd.SupportMultiDottedExtensions = true; sfd.Filter = "PNG格式|*.png|JPG格式|*.jpg"; sfd.AddExtension = true; if (sfd.ShowDialog() == DialogResult.OK) { EncoderParameters myEncoderParameters = new EncoderParameters(1); myEncoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, 100L); pictureBox1.Image.Save(sfd.FileName, GetEncoderInfo("image/png"), myEncoderParameters); } } private void init() { Font font = new Font("華文行楷", 36, FontStyle.Bold); txtFont.Font = font; panelFontColor1.BackColor = ColorTranslator.FromHtml("#ff0080ff"); panelFontColor2.BackColor = ColorTranslator.FromHtml("#ffff80c0"); } public byte[] CreateIamge(string str) { int w = Convert.ToInt32(txtWidth.Text); int h = Convert.ToInt32(txtHeight.Text); //漸變畫筆 LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, w, h), panelFontColor1.BackColor, panelFontColor2.BackColor, 25f, true); Bitmap image = new Bitmap(w, h); Graphics g = Graphics.FromImage(image); //設置高質量插值法 g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic; //設置高質量,低速度呈現平滑程度 g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality; //消除鋸齒 g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias; //填充背景色 g.FillRectangle(new SolidBrush(panelBgColor.BackColor), new Rectangle(0, 0, w, h)); //設置文本呈現方式 g.TextRenderingHint = TextRenderingHint.ClearTypeGridFit; //獲取文字大小 SizeF sf = g.MeasureString(str, txtFont.Font); g.DrawString(str, txtFont.Font, brush, (w - sf.Width) / 2, (h - sf.Height) / 2); MemoryStream stream = new MemoryStream(); //高質量保存 EncoderParameters myEncoderParameters = new EncoderParameters(1); myEncoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, 100L); image.Save(stream, GetEncoderInfo("image/png"), myEncoderParameters); byte[] buffer = stream.ToArray(); g.Dispose(); image.Dispose(); return buffer; } private static ImageCodecInfo GetEncoderInfo(String mimeType) { int j; ImageCodecInfo[] encoders; encoders = ImageCodecInfo.GetImageEncoders(); for (j = 0; j < encoders.Length; ++j) { if (encoders[j].MimeType == mimeType) return encoders[j]; } return null; }
實現效果
到此這篇關於C#實現封面圖片生成器的示例代碼的文章就介紹到這瞭,更多相關C#封面圖片生成器內容請搜索WalkonNet以前的文章或繼續瀏覽下面的相關文章希望大傢以後多多支持WalkonNet!