一个图片缩放的类
做开发时经常需要把图片缩放，特献上一个图片缩放的类!
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
///
/// Photo 的摘要说明
///
public class Photo
{
public Photo()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
//************************************************************//
//下面给出三个简单的方法，后面两个方法是扩展，估计有时用得着
//************************************************************//
///
/// 缩小图片
///
/// 源图文件名(包括路径)
/// 缩小后保存为文件名(包括路径)
/// 缩小至宽度
/// 缩小至高度
public void SmallPic(string strOldPic, string strNewPic, int intWidth, int intHeight)
{
System.Drawing.Bitmap objPic, objNewPic;
try
{
objPic = new System.Drawing.Bitmap(strOldPic);
objNewPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);
objNewPic.Save(strNewPic);
}
catch (Exception exp) { throw exp; }
finally
{
objPic = null;
objNewPic = null;
}
}
///
/// 按比例缩小图片，自动计算高度
///
/// 源图文件名(包括路径)
/// 缩小后保存为文件名(包括路径)
/// 缩小至宽度
public void SmallPicHeight(string strOldPic, string strNewPic, int intWidth)
{
System.Drawing.Bitmap objPic, objNewPic;
try
{
objPic = new System.Drawing.Bitmap(strOldPic);
int intHeight = (intWidth / objPic.Width) * objPic.Height;
objNewPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);
objNewPic.Save(strNewPic);
}
catch (Exception exp) { throw exp; }
finally
{
objPic = null;
objNewPic = null;
}
}
///
/// 按比例缩小图片，自动计算宽度
///
/// 源图文件名(包括路径)
/// 缩小后保存为文件名(包括路径)
/// 缩小至高度
public void SmallPicWidth(string strOldPic, string strNewPic, int intHeight)
{
System.Drawing.Bitmap objPic, objNewPic;
try
{
objPic = new System.Drawing.Bitmap(strOldPic);
int intWidth = (intHeight / objPic.Height) * objPic.Width;
objNewPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);
objNewPic.Save(strNewPic);
}
catch (Exception exp) { throw exp; }
finally
{
objPic = null;
objNewPic = null;
}
}
}