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  • 在c#中图片原比例缩放

    在c#中图片原比例缩放
    cs中的一种写法.要引用using System.IO;

      string image_path = this.MapPath("~/work/" + Logo.jpg);
                    ImageButtonLogo.Width = 120;
                    ImageButtonLogo.Height = 90;
                    ImageButtonLogo.ImageUrl = ResolveUrl("~/work/" + Logo.jpg);
                    if (File.Exists(image_path))
                    {
                        System.Drawing.Image img = System.Drawing.Image.FromFile(image_path);

                        double _width = img.Size.Width;
                        double _height = img.Size.Height;
                        double _zoom_factor = _width / 120;
                        if (_height / 90 > _zoom_factor) _zoom_factor = _height / 90;
                        if (_zoom_factor > 1)
                        {
                            ImageButtonLogo.Width = Convert.ToInt32(_width / _zoom_factor);
                            ImageButtonLogo.Height = Convert.ToInt32(_height / _zoom_factor);
                        }
                    }
                    else
                    {
                        ImageButtonLogo.ImageUrl = ResolveUrl("~/work/default.jpg");
                    }

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  • 原文地址:https://www.cnblogs.com/qfb620/p/1083980.html
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