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本文實例講述了C#自界說簽名章完成辦法。分享給年夜家供年夜家參考。詳細完成辦法以下:
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Drawing; using System.Drawing.Imaging; using System.Drawing.Drawing2D; namespace WfpApp { public class DrawCachet { /// <summary> /// 自界說卵形簽名章 /// </summary> /// <param name="Width">寬度,畫出的簽名章只要這寬度的一半</param> /// <param name="Height">高度,畫出的簽名章只要這高度的一半</param> /// <param name="test">簽名章上名字</param> /// <param name="IsRotate">簽名章能否扭轉角度</param> /// <param name="angle">扭轉角度的年夜小</param> /// <returns></returns> public static Bitmap GetDrawCircleCachet(int Width, int Height, string test, bool IsRotate, int angle) { //記載圓畫筆的粗細 int Circle_Brush = 2; //畫布 Bitmap bitmap = new Bitmap(Width, Height); //界說字符串的款式 Font var_Font = new Font("Arial", 13, FontStyle.Bold); //界說一個矩形 ,設置圓的繪制區 Rectangle rect = new Rectangle(10, 10, Width / 2, Height / 2); //實例化Graphic類 Graphics g = System.Drawing.Graphics.FromImage(bitmap); //清除繪制圖形的鋸齒,膩滑 g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias; //以白色清空panelCachet畫布配景 g.Clear(Color.White); //設置畫筆的色彩 Pen mypen = new Pen(Color.Red, Circle_Brush); //繪制圓 g.DrawEllipse(mypen, rect); //設置文字的字體款式 Font star_Font = new Font("Arial", 12, FontStyle.Regular); //對字符串停止寬度和長度丈量 SizeF var_Size = g.MeasureString(test, star_Font); float CircleZjW = rect.Width + 2 * Circle_Brush; float CircleZJH = rect.Height + 2 * Circle_Brush; float x = (CircleZjW - var_Size.Width) / 2F + rect.X; float y = (CircleZJH - var_Size.Height) / 2F + rect.Y; //在指定的地位繪制文字 g.DrawString(test, star_Font, mypen.Brush, new PointF(x, y)); if (IsRotate) bitmap = Rotate(bitmap, angle); return bitmap; } /// <summary> /// 自界說矩形簽名章 /// </summary> /// <param name="width">寬度,畫出的簽名章只要這寬度的一半</param> /// <param name="height">高度,畫出的簽名章只要這高度的一半</param> /// <param name="name">簽名章上名字</param> /// <param name="IsRotate">簽名章能否扭轉角度</param> /// <param name="angle">扭轉角度的年夜小</param> /// <returns></returns> public static Bitmap GetDrawRectangle(int width, int height, string name, bool IsRotate, int angle) { //記載圓畫筆的粗細 int Circle_Brush = 2; //畫布 Bitmap bitmap = new Bitmap(width, height); //界說字符串的款式 Font var_Font = new Font("Arial", 13, FontStyle.Bold); //界說一個矩形 ,設置圓的繪制區 Rectangle rect = new Rectangle(10, 10, width / 2, height / 2); //實例化Graphic類 Graphics g = System.Drawing.Graphics.FromImage(bitmap); //清除繪制圖形的鋸齒,膩滑 g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias; //以白色清空panelCachet畫布配景 g.Clear(Color.White); //設置畫筆的色彩 Pen mypen = new Pen(Color.Red, Circle_Brush); //繪制圓 g.DrawRectangle(mypen, rect); //設置文字的字體款式 Font star_Font = new Font("Arial", 12, FontStyle.Regular); //對字符串停止寬度和長度丈量 SizeF var_Size = g.MeasureString(name, star_Font); float CircleZjW = rect.Width + 2 * Circle_Brush; float CircleZJH = rect.Height + 2 * Circle_Brush; float x = (CircleZjW - var_Size.Width) / 2F + rect.X; float y = (CircleZJH - var_Size.Height) / 2F + rect.Y; //在指定的地位繪制文字 g.DrawString(name, star_Font, mypen.Brush, new PointF(x, y)); if (IsRotate) bitmap = Rotate(bitmap, angle); return bitmap; } /// <summary> /// 簽名章扭轉 /// </summary> /// <param name="b">Bitmap钤記</param> /// <param name="angle">扭轉度</param> /// <returns></returns> static Bitmap Rotate(Bitmap b, int angle) { angle = angle % 360; //弧度轉換 double radian = angle * Math.PI / 180.0; double cos = Math.Cos(radian); double sin = Math.Sin(radian); //原圖的寬和高 int w = b.Width; int h = b.Height; int W = (int)(Math.Max(Math.Abs(w * cos - h * sin), Math.Abs(w * cos + h * sin))); int H = (int)(Math.Max(Math.Abs(w * sin - h * cos), Math.Abs(w * sin + h * cos))); //目的位圖 Bitmap dsImage = new Bitmap(W, H); System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(dsImage); g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.Bilinear; g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; //盤算偏移量 Point Offset = new Point((W - w) / 2, (H - h) / 2); //結構圖象顯示區域:讓圖象的中間與窗口的中間點分歧 Rectangle rect = new Rectangle(Offset.X, Offset.Y, w, h); Point center = new Point(rect.X + rect.Width / 2, rect.Y + rect.Height / 2); g.TranslateTransform(center.X, center.Y); g.RotateTransform(360 - angle); //恢復圖象在程度和垂直偏向的平移 g.TranslateTransform(-center.X, -center.Y); g.DrawImage(b, rect); //重至畫圖的一切變換 g.ResetTransform(); g.Save(); g.Dispose(); //dsImage.Save("yuancd.jpg", System.Drawing.Imaging.ImageFormat.Jpeg); return dsImage; } } }
願望本文所述對年夜家的C#法式設計有所贊助。