程序控制图片显示大小

ImageManager.cs

/// <summary>
/// Summary description for ImageManage
/// </summary>
public class ImageManager
{
    public static string BLANK = "_blank";
    public static string PARENT = "_parent";
    public static string SEARCH = "_search";
    public static string SELF = "_self";
    public static string TOP = "_top";

    public static string GetImageFormat(string imagePath,string serverPath, int width, int height)
    {
        System.Drawing.Image img = System.Drawing.Image.FromFile(serverPath);
        int imgWidth = img.Width;
        int imgHeight = img.Height;
        int showWidth;
        int showHeight;
        if (imgWidth <= width && imgHeight <= height)
        {
            showWidth = imgWidth;
            showHeight = imgHeight;
        }
        else
        {
            if (imgWidth / width > imgHeight / height)
            {
                showWidth = width;
                showHeight = width * imgHeight / imgWidth;
                
            }
            else
            {
                showHeight = height;
                showWidth = imgWidth * height / imgHeight;
                
            }
        }
        string returnString = "<img src=\"" + imagePath + "\" style=\"height:" + showHeight + "px;width:" + showWidth +
                              "px;border-width:0px;\" />";
        return returnString;
    }

    public static string GetImageFormat(string imagePath, string serverPath, int width, int height, string url)
    {
        System.Drawing.Image img = System.Drawing.Image.FromFile(serverPath);
        int imgWidth = img.Width;
        int imgHeight = img.Height;
        int showWidth;
        int showHeight;
        if (imgWidth <= width && imgHeight <= height)
        {
            showWidth = imgWidth;
            showHeight = imgHeight;
        }
        else
        {
            if (imgWidth / width > imgHeight / height)
            {
                showWidth = width;
                showHeight = width * imgHeight / imgWidth;

            }
            else
            {
                showHeight = height;
                showWidth = imgWidth * height / imgHeight;

            }
        }
        string returnString = "<a target=\"_blank\" href=\"" + url + "\"><img src=\"" + imagePath + "\" style=\"height:" + showHeight + "px;width:" + showWidth +
                              "px;border-width:0px;\" /></a>";
        return returnString;
    }

    public static string GetImageFormat(string imagePath, string serverPath, int width, int height, string target, string url)
    {
        System.Drawing.Image img = System.Drawing.Image.FromFile(serverPath);
        int imgWidth = img.Width;
        int imgHeight = img.Height;
        int showWidth;
        int showHeight;
        if (imgWidth <= width && imgHeight <= height)
        {
            showWidth = imgWidth;
            showHeight = imgHeight;
        }
        else
        {
            if (imgWidth / width > imgHeight / height)
            {
                showWidth = width;
                showHeight = width * imgHeight / imgWidth;

            }
            else
            {
                showHeight = height;
                showWidth = imgWidth * height / imgHeight;

            }
        }
        string returnString = "<a target=\"" + target + "\" href=\"" + url + "\"><img src=\"" + imagePath + "\" style=\"height:" + showHeight + "px;width:" + showWidth +
                              "px;border-width:0px;\" /></a>";
        return returnString;
    }

    public static string GetImageFormatWithTable(string imagePath, string serverPath, int width, int height)
    {
        System.Drawing.Image img = System.Drawing.Image.FromFile(serverPath);
        int imgWidth = img.Width;
        int imgHeight = img.Height;
        int showWidth;
        int showHeight;
        if (imgWidth <= width && imgHeight <= height)
        {
            showWidth = imgWidth;
            showHeight = imgHeight;
        }
        else
        {
            if (imgWidth / width > imgHeight / height)
            {
                showWidth = width;
                showHeight = width * imgHeight / imgWidth;

            }
            else
            {
                showHeight = height;
                showWidth = imgWidth * height / imgHeight;

            }
        }
        string returnString = "<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\">"
                              + "\r\n  <tr>"
                              + "\r\n   <td align=\"center\" valign=\"middle\" style=\"width: " + width + "px; height: " + height + "px; background-color: white;\">"
                              + "\r\n   <img src=\"" + imagePath + "\" style=\"height:" + showHeight + "px;width:" + showWidth + "px;border-width:0px;\" />"
                              + "\r\n   </td>"
                              + "\r\n   </tr>"
                              + "\r\n   </table>";
        return returnString;
    }

    public static string GetImageFormatWithTable(string imagePath, string serverPath, int width, int height, string url)
    {
        System.Drawing.Image img = System.Drawing.Image.FromFile(serverPath);
        int imgWidth = img.Width;
        int imgHeight = img.Height;
        int showWidth;
        int showHeight;
        if (imgWidth <= width && imgHeight <= height)
        {
            showWidth = imgWidth;
            showHeight = imgHeight;
        }
        else
        {
            if (imgWidth / width > imgHeight / height)
            {
                showWidth = width;
                showHeight = width * imgHeight / imgWidth;

            }
            else
            {
                showHeight = height;
                showWidth = imgWidth * height / imgHeight;

            }
        }
        string returnString = "<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\">"
                              + "\r\n  <tr>"
                              + "\r\n   <td align=\"center\" valign=\"middle\" style=\"width: " + width + "px; height: " + height + "px; background-color: white;\">"
                              + "\r\n   <a target=\"_blank\" href=\"" + url + "\">"
                              + "\r\n   <img src=\"" + imagePath + "\" style=\"height:" + showHeight + "px;width:" + showWidth + "px;border-width:0px;\" />"
                              + "\r\n   </a></td>"
                              + "\r\n   </tr>"
                              + "\r\n   </table>";
        return returnString;
    }

    public static string GetImageFormatWithTable(string imagePath, string serverPath, int width, int height, string target, string url)
    {
        System.Drawing.Image img = System.Drawing.Image.FromFile(serverPath);
        int imgWidth = img.Width;
        int imgHeight = img.Height;
        int showWidth;
        int showHeight;
        if (imgWidth <= width && imgHeight <= height)
        {
            showWidth = imgWidth;
            showHeight = imgHeight;
        }
        else
        {
            if (imgWidth / width > imgHeight / height)
            {
                showWidth = width;
                showHeight = width * imgHeight / imgWidth;

            }
            else
            {
                showHeight = height;
                showWidth = imgWidth * height / imgHeight;

            }
        }
        string returnString = "<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\">"
                              + "\r\n  <tr>"
                              + "\r\n   <td align=\"center\" valign=\"middle\" style=\"width: " + width + "px; height: " + height + "px; background-color: white;\">"
                              + "\r\n   <a target=\"" + target + "\" href=\"" + url + "\">"
                              + "\r\n   <img src=\"" + imagePath + "\" style=\"height:" + showHeight + "px;width:" + showWidth + "px;border-width:0px;\" />"
                              + "\r\n   </a></td>"
                              + "\r\n   </tr>"
                              + "\r\n   </table>";
        return returnString;
    }
}