/// <summary>
/// 系统会自动生成guid文件名,保存到当前根目录下,如果非图片类型则返回false,当前紧支持jpg、png、gif格式
/// </summary>
/// <param name="file">一般为post的参数, ashx文件示例: context.Request.Files[0]</param>
/// <param name="folderName">存放的目录名称,比如image文件夹,如果存在多级目录则 image/product,前后无需"/"斜杠</param>
/// <returns>MyWebLibrary SaveImageInfo对象</returns>
public static SaveImageInfo SaveNewImage(HttpPostedFile file)
{
SaveImageInfo img = new SaveImageInfo();
if (IsImageType(file))
{
string extName = Path.GetExtension(file.FileName);
string fileName = Guid.NewGuid().ToString();
img.fileName = fileName + extName;
img.fullPath = HttpContext.Current.Server.MapPath("~/" + img.fileName);
file.SaveAs(img.fullPath);
img.isSave = true;
return(img);
}
else
{
img.isSave = false;
return(img);
}
}
/// <summary>
/// 此方法一般用来生成缩略图 系统会自动生成guid文件名,如果非图片类型则返回false,当前紧支持jpg、png、gif格式
/// </summary>
/// <param name="file">一般为post的参数, ashx文件示例: context.Request.Files[0]</param>
/// <param name="folderName">存放的目录名称,比如image文件夹,如果存在多级目录则 image/product,前后无需"/"斜杠</param>
/// <param name="imgWidth">图片宽度</param>
/// <param name="imgHeight">图片高度</param>
/// <returns>MyWebLibrary SaveImageInfo对象</returns>
public static SaveImageInfo SaveNewImage(HttpPostedFile file, string folderName, int imgWidth, int imgHeight)
{
SaveImageInfo imageInfo = new SaveImageInfo();
if (IsImageType(file))
{
string extName = Path.GetExtension(file.FileName);
string fileName = Guid.NewGuid().ToString();
using (System.Drawing.Image img = System.Drawing.Image.FromStream(file.InputStream))
{
int oldWidth = img.Width;
int oldHeight = img.Height;
using (Bitmap bmp = new Bitmap(imgWidth, imgHeight))
{
using (Graphics g = Graphics.FromImage(bmp))
{
g.Clear(Color.Transparent);
g.InterpolationMode = InterpolationMode.High;
g.CompositingQuality = CompositingQuality.HighQuality;
g.SmoothingMode = SmoothingMode.HighQuality;
g.DrawImage(img, new Rectangle(0, 0, imgWidth, imgHeight), new Rectangle(0, 0, oldWidth, oldHeight), GraphicsUnit.Pixel);
string newFileName = Path.GetFileNameWithoutExtension(fileName) + extName;
imageInfo.fileName = newFileName;
imageInfo.fullPath = HttpContext.Current.Server.MapPath("~/" + folderName + "/") + newFileName;
bmp.Save(imageInfo.fullPath, ImageFormat.Jpeg);
}
}
}
imageInfo.isSave = true;
return(imageInfo);
}
else
{
imageInfo.isSave = false;
return(imageInfo);
}
}
public static SaveImageInfo CreateNewImage(HttpPostedFile file, ImageInfo imageInfo)
{
SaveImageInfo saveImageInfo = new SaveImageInfo();
if (IsImageType(file))
{
string extName = Path.GetExtension(file.FileName);
string fileName = imageInfo.fileName == null?Guid.NewGuid().ToString() : imageInfo.fileName;
string folderPath = imageInfo.folderPath == null ? "" : imageInfo.folderPath + "/";
using (System.Drawing.Image img = System.Drawing.Image.FromStream(file.InputStream))
{
int oldWidth = img.Width;
int oldHeight = img.Height;
int imgWidth = imageInfo.imgWidth == null ? oldWidth : Convert.ToInt16(imageInfo.imgWidth);
int imgHeight = imageInfo.imgHeight == null ? oldHeight : Convert.ToInt16(imageInfo.imgHeight);
using (Bitmap bmp = new Bitmap(imgWidth, imgHeight))
{
using (Graphics g = Graphics.FromImage(bmp))
{
g.Clear(Color.Transparent);
g.InterpolationMode = InterpolationMode.High;
g.CompositingQuality = CompositingQuality.HighQuality;
g.SmoothingMode = SmoothingMode.HighQuality;
g.DrawImage(img, new Rectangle(0, 0, imgWidth, imgHeight), new Rectangle(0, 0, oldWidth, oldHeight), GraphicsUnit.Pixel);
//添加文字模块----------------------------
if (imageInfo.text != null)
{
Font font = new Font(imageInfo.fontFamily, imageInfo.fontSize);
SolidBrush sbrush = new SolidBrush(Color.FromArgb(imageInfo.opacity, 255, 255, 255)); //Color.White
g.DrawString(imageInfo.text, font, sbrush, imageInfo.textX, imageInfo.textY);
}
//添加文字模块----------------------------
//添加水印--------------------------------
if (imageInfo.waterFilePath != null)
{
System.Drawing.Image water = System.Drawing.Image.FromFile(HttpContext.Current.Server.MapPath("~/" + imageInfo.waterFilePath));
g.DrawImage(water, new Rectangle(0, 0, water.Width, water.Height), 0, 0, water.Width, water.Height, GraphicsUnit.Pixel);
water.Dispose();
}
//添加水印---------------------------------
string newFileName = Path.GetFileNameWithoutExtension(fileName) + extName;
saveImageInfo.fileName = newFileName;
saveImageInfo.fullPath = imageInfo.path == null?HttpContext.Current.Server.MapPath("~/" + folderPath) + newFileName : imageInfo.path;
bmp.Save(saveImageInfo.fullPath, ImageFormat.Jpeg);
saveImageInfo.isSave = true;
return(saveImageInfo);
}
}
}
}
else
{
saveImageInfo.isSave = false;
return(saveImageInfo);
}
}