/// <summary>
/// 将PredefinedExt转换成FileExtFilter
/// </summary>
/// <param name="extType"></param>
/// <returns></returns>
private static FileExtFilter ToFileExtFilter(this PredefinedExt extType)
{
if (!PredefinedExtList.ContainsKey(extType))
{
return(null);
}
return(new FileExtFilter(extType.GetDesc(), PredefinedExtList[extType]));
}
/// <summary>
/// 检查当前标志中是否包含目标标志组
/// </summary>
/// <param name="self"></param>
/// <param name="flags">目标标志组</param>
/// <param name="checkAll">检查全部或任意</param>
/// <returns></returns>
public static bool Contains(this PredefinedExt self, PredefinedExt flags, bool checkAll = true)
{
if (checkAll)
{
return(((uint)self).ContainsAll((uint)flags));
}
else
{
return(((uint)self).ContainsAny((uint)flags));
}
}
/// <summary>
/// 包含时添加
/// </summary>
/// <param name="extFilters"></param>
/// <param name="extType"></param>
/// <param name="toCheckExtType"></param>
private static void CheckAdd(this List <FileExtFilter> extFilters, PredefinedExt extType, PredefinedExt toCheckExtType)
{
if (!extType.Contains(toCheckExtType))
{
return;
}
var extFilter = toCheckExtType.ToFileExtFilter();
if (null == extFilter)
{
return;
}
extFilters.Add(extFilter);
}
/// <summary>
/// 设置文件后缀
/// </summary>
/// <param name="extType">预定义的文件后缀类型</param>
/// <returns></returns>
public static List <FileExtFilter> SetFileExts(PredefinedExt extType)
{
var extFilters = new List <FileExtFilter>();
extFilters.CheckAdd(extType, PredefinedExt.Image);
extFilters.CheckAdd(extType, PredefinedExt.Zip);
extFilters.CheckAdd(extType, PredefinedExt.Rar);
extFilters.CheckAdd(extType, PredefinedExt.Word);
extFilters.CheckAdd(extType, PredefinedExt.Word_2003);
extFilters.CheckAdd(extType, PredefinedExt.Word_2007);
extFilters.CheckAdd(extType, PredefinedExt.Excel);
extFilters.CheckAdd(extType, PredefinedExt.Excel_2003);
extFilters.CheckAdd(extType, PredefinedExt.Excel_2007);
extFilters.CheckAdd(extType, PredefinedExt.PowerPoint);
extFilters.CheckAdd(extType, PredefinedExt.PowerPoint_2003);
extFilters.CheckAdd(extType, PredefinedExt.PowerPoint_2007);
//“全部”放到最后添加
extFilters.CheckAdd(extType, PredefinedExt.All);
return(extFilters);
}
