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這篇文章主要介紹“C#怎么實(shí)現(xiàn)在底圖上動態(tài)生成文字和圖片”,在日常操作中,相信很多人在C#怎么實(shí)現(xiàn)在底圖上動態(tài)生成文字和圖片問題上存在疑惑,小編查閱了各式資料,整理出簡單好用的操作方法,希望對大家解答”C#怎么實(shí)現(xiàn)在底圖上動態(tài)生成文字和圖片”的疑惑有所幫助!接下來,請跟著小編一起來學(xué)習(xí)吧!
本文主要記錄在圖片上動態(tài)的生成需要添加的文字和把指定的圖片加到底圖上,直接上代碼
/// <summary>/// 在底圖上畫指定路徑的圖片/// </summary>/// <param name="g">畫板實(shí)例</param>/// <param name="path">圖片路徑</param>/// <param name="totalWidth">畫區(qū)總長度</param>/// <param name="totalHeight">畫區(qū)總高度</param>/// <param name="px">起點(diǎn)X坐標(biāo)</param>/// <param name="py">起點(diǎn)Y坐標(biāo)</param> private void FontPic(ref Graphics g, string path, int totalWidth, int totalHeight, int px, int py) { if (File.Exists(path)) { var pImg = Image.FromFile(path); //如果圖片大于畫布區(qū)域,則縮小 if (totalHeight < pImg.Height && totalWidth < pImg.Width) { Image newPic = GetReducedImage(pImg, totalWidth, totalHeight); if (newPic != null) { DrawPic(ref g, totalWidth, totalHeight, px, py, newPic); } } else if (totalHeight < pImg.Height && totalWidth >= pImg.Width) { Image newPic = GetReducedImage(pImg, pImg.Width, totalHeight); if (newPic != null) { DrawPic(ref g, totalWidth, totalHeight, px, py, newPic); } } else if (totalHeight >= pImg.Height && totalWidth < pImg.Width) { Image newPic = GetReducedImage(pImg, totalWidth, pImg.Height); if (newPic != null) { DrawPic(ref g, totalWidth, totalHeight, px, py, newPic); } } else { DrawPic(ref g, totalWidth, totalHeight, px, py, pImg); } } } /// <summary> /// 在圖上畫圖片 /// </summary> /// <param name="g">畫板實(shí)例</param> /// <param name="totalWidth">畫區(qū)總長度</param> /// <param name="totalHeight">畫區(qū)總高度</param> /// <param name="px">起點(diǎn)X坐標(biāo)</param> /// <param name="py">起點(diǎn)Y坐標(biāo)</param> /// <param name="pImg">要畫的圖片實(shí)例</param> private void DrawPic(ref Graphics g, int totalWidth, int totalHeight, int px, int py, Image pImg) { px += GetValue(totalWidth, pImg.Width); py += GetValue(totalHeight, pImg.Height); g.DrawImage(new Bitmap(pImg, new Size(GetSize(totalWidth, pImg.Width), GetSize(totalHeight, pImg.Height))), new Rectangle(px, py, totalWidth, totalHeight), 0, 0, totalWidth, totalHeight, GraphicsUnit.Pixel); } /// <summary> /// 生成縮略圖重載方法1,返回縮略圖的Image對象 /// </summary> /// <param name="width">縮略圖的寬度</param> /// <param name="height">縮略圖的高度</param> /// <returns>縮略圖的Image對象</returns> public Image GetReducedImage(Image resourceImage, int width, int height) { try { Image data = null; //用指定的大小和格式初始化Bitmap類的新實(shí)例 using (Bitmap bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb)) { //從指定的Image對象創(chuàng)建新Graphics對象 using (Graphics graphics = Graphics.FromImage(bitmap)) { //清除整個繪圖面并以透明背景色填充 //graphics.Clear(Color.Transparent); //在指定位置并且按指定大小繪制原圖片對象 graphics.DrawImage(resourceImage, new Rectangle(0, 0, width, height)); } data = new Bitmap(bitmap); } return data; } catch (Exception e) { throw e; } } /// <summary> /// 比較兩個值,得到給到給定值(判斷是否越界) /// </summary> /// <param name="total">總長度</param> /// <param name="width">指定長度</param> /// <returns></returns> public int GetSize(int total, int width) { if (total > width) { return width; } else { return total; } } /// <summary> /// 更加傳入的值計算得到新值(計算點(diǎn)坐標(biāo)) /// </summary> /// <param name="total">總長度</param> /// <param name="width">指定長度</param> /// <returns></returns> private int GetValue(int total, int width) { return (total - width) / 2; } /// <summary> /// 在圖片上畫出文字 /// </summary> /// <param name="g">圖片對象</param> /// <param name="pointX">文字x坐標(biāo)</param> /// <param name="pointY">文字y坐標(biāo)</param> /// <param name="word">文字內(nèi)容</param> /// <param name="textWidth">文本寬度</param> /// <param name="textHeight">文本高度</param> private static void DrawStringWord(Graphics g, int pointX, int pointY, string word, int textWidth, int textHeight, int fontSize = 30) { Font font = new Font("微軟雅黑", fontSize, (FontStyle.Regular)); RectangleF textArea = new RectangleF(pointX, pointY, textWidth, textHeight); Brush brush = new SolidBrush(Color.Black); g.DrawString(word, font, brush, textArea); }
到此,關(guān)于“C#怎么實(shí)現(xiàn)在底圖上動態(tài)生成文字和圖片”的學(xué)習(xí)就結(jié)束了,希望能夠解決大家的疑惑。理論與實(shí)踐的搭配能更好的幫助大家學(xué)習(xí),快去試試吧!若想繼續(xù)學(xué)習(xí)更多相關(guān)知識,請繼續(xù)關(guān)注億速云網(wǎng)站,小編會繼續(xù)努力為大家?guī)砀鄬?shí)用的文章!
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