/// <summary>
/// 获取缩略图
/// </summary>
/// <param name="path">目标文件的存放路径</param>
/// <param name="condtion"></param>
/// <returns></returns>
public static string GetImgFileThumbnailPath(string path, GetImgFileThumbnailRequest condtion)
{
ValiDatas.valiData(condtion);
int width = condtion.Width;
int height = condtion.Height;
string imgUrl = path;
string fileName = HttpContext.Current.Server.MapPath(imgUrl);
if (!File.Exists(fileName))
{
throw new DataNotFundException("指定的文件不存在");
}
string fileExt = System.IO.Path.GetExtension(fileName).ToLower();
string[] imgTypes = { ".gif", ".jpg", ".jpeg", ".png", ".bmp" };
if (!imgTypes.Contains(fileExt))
{
throw new ValiDataException("只有图片文件才能生成缩略图");
}
if (imgUrl.IndexOf("thumbnail", StringComparison.OrdinalIgnoreCase) != -1)
{
throw new ValiDataException("传入的文件已经是缩略图地址了，不能再生成缩略图");
}
string imgDir = string.Format("{0}/thumbnail/{1}_{2}", imgUrl.Substring(0, imgUrl.LastIndexOf('.')), width, height);
string imgFile = string.Format("{0}/{1}", imgDir, imgUrl.Substring(imgUrl.LastIndexOf("/", StringComparison.OrdinalIgnoreCase)));
//判断目录是否存在
if (!Directory.Exists(HttpContext.Current.Server.MapPath(imgDir)))
{
Directory.CreateDirectory(HttpContext.Current.Server.MapPath(imgDir));
}
//创建缩略图
if (!File.Exists(HttpContext.Current.Server.MapPath(imgFile)))
{
MakeThumbnail(fileName, HttpContext.Current.Server.MapPath(imgFile), width, height);
}
return(imgFile);
}
/// <summary>
/// 获取缩略图
/// </summary>
/// <param name="condtion"></param>
/// <returns></returns>
public string GetImgFileThumbnailPath(GetImgFileThumbnailRequest condtion)
{
return(GetImgFileThumbnailPath(this.Path, condtion));
}
