附件上传图片缩小保存

1.定义保存路径

fileAllPath = fileDirectory.TrimEnd('\\') + "/Uploadfiles/" + newname + suffix

2.附件控件submit提交表单后获取HttpPostedFile对象,假设是单个文件上传

HttpPostedFile fup_Upload1 = context.Request.Files[0];

3.定义源文件对象System.Drawing.Image,然后创建缩小后文件对象System.Drawing.Bitmap,并设置缩小后的宽度和高度

System.Drawing.Image image = new System.Drawing.Bitmap(fup_Upload1.InputStream);

伪代码如下:

fileAllPath = fileDirectory.TrimEnd('\\') + "/Uploadfiles/" + newname + suffix

HttpPostedFile fup_Upload1 = context.Request.Files[0];

System.Drawing.Image image = new System.Drawing.Bitmap(fup_Upload1.InputStream);
if (image != null)
 {
                    wFile.P_height = 640;
                    wFile.P_width = 450;
                    System.Drawing.Bitmap bitSmallImage = new System.Drawing.Bitmap(image, wFile.P_width, wFile.P_height);
                    bitSmallImage.Save(fileAllPath);          
}