做了一个简单的论坛,但是Image是根据图片的大小来显示的,我想把Image设定固定大小
就如CSDN用户图片样!?请问有什么办法么?

解决方案 »

  1.   

    设定Image的Width(宽度)及Height(高度) 属性
      

  2.   

    <img width="10px;" height="10px;" src="" />
      

  3.   


    <img src="<%= %>" width="500" height="300"/>?
      

  4.   

    可以用css样式来控制额设置长和宽,你懂的!
      

  5.   

    全部生成缩略图 public class ImagesTest
        {
            /// <summary>
            /// 生成缩略图
            /// </summary>
            /// <param name="originalImagePath">源图路径(物理路径)</param>
            /// <param name="thumbnailPath">缩略图路径(物理路径)</param>
            /// <param name="width">缩略图宽度</param>
            /// <param name="height">缩略图高度</param>
            /// <param name="mode">生成缩略图的方式:HW,W,H,Cut</param>    
            public void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
            {
                System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);            int towidth = width;
                int toheight = height;            int x = 0;
                int y = 0;
                int ow = originalImage.Width;
                int oh = originalImage.Height;            switch (mode)
                {
                    case "HW"://指定高宽缩放(可能变形)                
                        break;
                    case "W"://指定宽,高按比例                    
                        toheight = originalImage.Height * width / originalImage.Width;
                        break;
                    case "H"://指定高,宽按比例
                        towidth = originalImage.Width * height / originalImage.Height;
                        break;
                    case "Cut"://指定高宽裁减(不变形)                
                        if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
                        {
                            oh = originalImage.Height;
                            ow = originalImage.Height * towidth / toheight;
                            y = 0;
                            x = (originalImage.Width - ow) / 2;
                        }
                        else
                        {
                            ow = originalImage.Width;
                            oh = originalImage.Width * height / towidth;
                            x = 0;
                            y = (originalImage.Height - oh) / 2;
                        }
                        break;
                    default:
                        break;
                }            //新建一个bmp图片
                System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);            //新建一个画板
                Graphics g = System.Drawing.Graphics.FromImage(bitmap);            //设置高质量插值法
                g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;            //设置高质量,低速度呈现平滑程度
                g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;            //清空画布并以透明背景色填充
                g.Clear(Color.Transparent);            //在指定位置并且按指定大小绘制原图片的指定部分
                g.DrawImage(originalImage, new Rectangle(0, 0, towidth, toheight),
                    new Rectangle(x, y, ow, oh),
                    GraphicsUnit.Pixel);            try
                {
                    //以jpg格式保存缩略图
                    bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);//走这里就错了
                }
                catch (System.Exception e)
                {
                    throw e;
                }
                finally
                {
                    originalImage.Dispose();
                    bitmap.Dispose();
                    g.Dispose();
                }
            }
        }
    调用
    /// <summary>
        /// 生成缩略图
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnSearch_Click(object sender, EventArgs e)
        {
            if (this.txtImageName.Text=="")
            {
                  Response.Write("<script>alert('请输入图片名称');top.location.reload();</script>");
            }
            else if(this.txtWidth.Text=="")
            {
                Response.Write("<script>alert('请输入图片宽度');top.location.reload();</script>");
            }
            else if (this.txtHeigh.Text=="")
            {
                  Response.Write("<script>alert('请输入图片高度');top.location.reload();</script>");
            }
            else
            {
                string images = this.txtImageName.Text.ToString();
                int w = Convert.ToInt32(this.txtWidth.Text.ToString());//自己定义的图像宽度
                int h = Convert.ToInt32(this.txtHeigh.Text.ToString());//自己定义的图像高度            ImagesTest imagesTest = new ImagesTest();
                string images1 = Server.MapPath("ImagesI/"+images);
                string images2 = Server.MapPath("ImagesII/"+images);
                int width = w;
                int heigh = h;
                string code = "";
                imagesTest.MakeThumbnail(images1, images2, width, heigh, code);
            }
        }图片处理函数
      

  6.   

    <img width="80px;" height="100px;" src="" />