生成图片水印代码,CSharp代码库,德仔网

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【CSharp】生成图片水印

作者:dezai / 发布于2014/1/23/ 634

其中logoFilePath是水印图片的地址，img是需要添加水印的图片。

string logoFilePath = Server.MapPath("~/imgs/logo-n.png");
  //获取水印图片
  using (System.Drawing.Image wrImage = System.Drawing.Image.FromFile(logoFilePath))
  {
    Graphics gWater = Graphics.FromImage(img);

    //透明属性
    ImageAttributes imgAttributes = new ImageAttributes();
    ColorMap colorMap = new ColorMap();
    colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
    colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
    ColorMap[] remapTable = { colorMap };
    imgAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);

    float[][] colorMatrixElements = {
      new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
      new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
      new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
      new float[] {0.0f, 0.0f, 0.0f, 0.5f, 0.0f},//透明度:0.5
      new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
    };

    ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements);
    imgAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
    gWater.DrawImage(wrImage,
      new Rectangle(img.Width - wrImage.Width,
        img.Height - wrImage.Height,
        wrImage.Width,
        wrImage.Height), 0, 0, wrImage.Width, wrImage.Height, GraphicsUnit.Pixel, imgAttributes);
    gWater.Dispose();
    wrImage.Dispose();
  }

试试其它关键字

　图片水印　

同语言下

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