将文本转换为图像

Question

我得到了使用 C# 将文本转换为图像的代码。代码如下。现在我的问题是这个函数返回一个位图图像。如何在我的 asp.net 页面中显示它。我想显示这个函数返回的图像。

private Bitmap CreateBitmapImage(string sImageText)
{
    Bitmap objBmpImage = new Bitmap(1, 1);

    int intWidth = 0;
    int intHeight = 0;

    // Create the Font object for the image text drawing.
    Font objFont = new Font("Arial", 20, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Pixel);

    // Create a graphics object to measure the text's width and height.
    Graphics objGraphics = Graphics.FromImage(objBmpImage);

    // This is where the bitmap size is determined.
    intWidth = (int)objGraphics.MeasureString(sImageText, objFont).Width;
    intHeight = (int)objGraphics.MeasureString(sImageText, objFont).Height;

    // Create the bmpImage again with the correct size for the text and font.
    objBmpImage = new Bitmap(objBmpImage, new Size(intWidth, intHeight));

    // Add the colors to the new bitmap.
    objGraphics = Graphics.FromImage(objBmpImage);

    // Set Background color
    objGraphics.Clear(Color.White);
    objGraphics.SmoothingMode = SmoothingMode.AntiAlias;
    objGraphics.TextRenderingHint = TextRenderingHint.AntiAlias;
    objGraphics.DrawString(sImageText, objFont, new SolidBrush(Color.FromArgb(102, 102, 102)), 0, 0);
    objGraphics.Flush();
    return (objBmpImage);
}  

Answer 1

有一个具有以下功能的示例

public Bitmap ConvertTextToImage(string txt, string fontname, int fontsize, Color bgcolor, Color fcolor, int width, int Height)
    {
        Bitmap bmp = new Bitmap(width, Height);
        using (Graphics graphics = Graphics.FromImage(bmp))
        {

            Font font = new Font(fontname, fontsize);
            graphics.FillRectangle(new SolidBrush(bgcolor), 0, 0, bmp.Width, bmp.Height);
            graphics.DrawString(txt, font, new SolidBrush(fcolor), 0, 0);
            graphics.Flush();
            font.Dispose();
            graphics.Dispose();


        }
        return bmp;
    }

并使用此功能：

ConvertTextToImage(txtvalue.Text, "Bookman Old Style", 10, Color.Yellow, Color.Red, txtvalue.Width, txtvalue.Height);