如何在C＃中的图像上添加带有文本的边框？

问题描述

我正在根据字符串图像创建图像。我想添加左边框和下边框，还想添加带边框的文本。所以我已经在Google上进行了研发，但没有为此找到合适的解决方案。 我得到的图像如下：

但是我需要下面的图像（左侧的半边框，底部的半边框，然后在底部的半边框之后有唯一的ID）：

那么如何实现它。我正在用C＃工作，我的代码如下：

string fullName = name.Trim();
Bitmap bitmap = new Bitmap(1,1,System.Drawing.Imaging.PixelFormat.Format32bppArgb);
string fontName = _fontfamily + ".ttf";
PrivateFontCollection privateFontCollection = new PrivateFontCollection();
privateFontCollection.AddFontFile(Server.MapPath("~/Content/fontCss/" + fontName));
FontFamily ff = privateFontCollection.Families[0];
Font font = new Font(ff,25,FontStyle.Regular,GraphicsUnit.Pixel);
Graphics graphics = Graphics.FromImage(bitmap);
int width = (int)graphics.MeasureString(fullName,font).Width;
int height = (int)graphics.MeasureString(fullName,font).Height;
bitmap.MakeTransparent(Color.Transparent);
bitmap = new Bitmap(bitmap,new Size(width,height));
graphics = Graphics.FromImage(bitmap);
graphics.Clear(Color.Transparent);
graphics.SmoothingMode = SmoothingMode.AntiAlias;
graphics.TextRenderingHint = TextRenderingHint.AntiAlias;
graphics.DrawString(fullName,font,Brushes.Black,0);
string fileName = Guid.NewGuid().ToString() + ".png";

var newImage = new Bitmap(bitmap.Width,bitmap.Height + 50);
var gr = Graphics.FromImage(newImage);
gr.DrawImageUnscaled(bitmap,0);
gr.DrawString("uniqueId",SystemFonts.DefaultFont,new RectangleF(0,bitmap.Height,bitmap.Width,50));
newImage.Save(Server.MapPath("~/UploadedDocuments/") + fileName,ImageFormat.Png);

那么如何获得此处显示的具有唯一ID且左侧和底部半边框的图像？

解决方法

您可以从此示例开始。

var img = DrawText("Tonton","Unique Id(12345)");

private Image DrawText(String text,String subText)
    {
        var textColor = Color.Black;
        var backColor = Color.Transparent;

        var textFont = new Font("Arial",15);
        Brush textBrush = new SolidBrush(textColor);

        var subTextFont = new Font("Arial",7);
        Brush subTextBrush = new SolidBrush(textColor);

        //first,create a dummy bitmap just to get a graphics object
        Image img = new Bitmap(1,1);
        Graphics drawing = Graphics.FromImage(img);

        //measure the string to see how big the image needs to be
        SizeF textSize = drawing.MeasureString(text,textFont);
        SizeF subTextSize = drawing.MeasureString(subText,subTextFont);

        //free up the dummy image and old graphics object
        img.Dispose();
        drawing.Dispose();

        //create a new image of the right size
        img = new Bitmap(((int)textSize.Width + (int)subTextSize.Width) - ((int)textSize.Width / 3),(int)textSize.Height + 15);

        drawing = Graphics.FromImage(img);
        drawing.TextRenderingHint = TextRenderingHint.SingleBitPerPixelGridFit;

        //paint the background
        drawing.Clear(backColor);
        
        //Draw Text
        drawing.DrawString(text,textFont,textBrush,5,0);

        //Drawing Line
        var linePen = new Pen(Color.Black,3);
        var height = (int)textSize.Height;
        var width = (int)textSize.Width;

        drawVerticalLine(drawing,linePen,1,height + 5);
        drawHorizontalLine(drawing,height + 5,width / 3);

        //Darw Subtext
        drawing.DrawString(subText,subTextFont,subTextBrush,width / 3,height);

        drawing.Save();

        textBrush.Dispose();
        drawing.Dispose();

        return img;
    }

    private void drawHorizontalLine(Graphics graphics,Pen pen,int x,int y,int width)
    {
        graphics.DrawLine(pen,x,y,x+width,y);
    }

    private void drawVerticalLine(Graphics graphics,int height)
    {
        graphics.DrawLine(pen,y+height);
    }

输出

我希望它会有所帮助。编码愉快。