目前我正在检索文件名取决于文件的创建时间......
我想要的是,我想从2011年10月2日到2011年11月2日(今天的日期)获取所有文件。(30天差异)
(即)我想从(today day - 30 days
)
我希望从(today day -90 days
)
因为我已经这样做了....
private void filteringFiles()
{
string filenamepath = @"C:\defualt\Access\backupdb\";
List<String> listfiles = Directory.GetFiles(@"C:\defualt\Access\backupdb\", "backup-*.zip").ToList();
List<String> files = new List<String>();
List<String> getfiles = new List<String>();
foreach (var allfiles in listfiles)
{
files.Add(Path.GetFileName(allfiles));
//DateTime creationtime = File.GetCreationTime(files);
}
if (cbbackupforms.Text == "Month")
{
getfiles = (from string s in files where (DateTime.Now.Day - Convert.ToInt32(File.GetCreationTime(Path.Combine(filenamepath, s)).AddDays(-30)) < 1) && (DateTime.Now.Year - File.GetCreationTime(Path.Combine(filenamepath, s)).Year == 0) select s).ToList();
}
if (cbbackupforms.Text == "3 Months")
{
getfiles = (from string s in files where (DateTime.Now.Day - Convert.ToInt32(File.GetCreationTime(Path.Combine(filenamepath, s)).AddDays(-90)) < 3) && (DateTime.Now.Year - File.GetCreationTime(Path.Combine(filenamepath, s)).Year == 0) select s).ToList();
}
if (cbbackupforms.Text =="6 Months")
{
getfiles = (from string s in files where (DateTime.Now.Day - Convert.ToInt32(File.GetCreationTime(Path.Combine(filenamepath, s)).AddDays(-180)) < 6) && (DateTime.Now.Year - File.GetCreationTime(Path.Combine(filenamepath, s)).Year == 0) select s).ToList();
}
if (cbbackupforms.Text == "year")
{
getfiles = (from string s in files where ((DateTime.Now.Month - File.GetCreationTime(Path.Combine(filenamepath, s)).Month) < 12) select s).ToList();
}
listbackups.DataSource = getfiles;
}
但是我在这一行得到了错误
(DateTime.Now.Year - File.GetCreationTime(Path.Combine(filenamepath, s)).Year == 0) select s)
像这样......
ERROR:{"Invalid cast from 'DateTime' to 'Int32'."}
任何人都会对此有所帮助...... 非常感谢...
更新:我仍然得到像这样的错误......
ERROR:{"Invalid cast from 'DateTime' to 'Int32'."}
在这一行
getfiles =(来自文件中的字符串s 其中(DateTime.Now.Day - Convert.ToInt32(File.GetCreationTime(Path.Combine(filenamepath,s))。AddDays(-30))&lt; 1) &amp;&amp;((DateTime.Now.Year - (File.GetCreationTime(Path.Combine(filenamepath,s)))。Year)== 0)select s)。ToList();
答案 0 :(得分:1)
将行更改为
((DateTime.Now.Year - (File.GetCreationTime(Path.Combine(filenamepath, s))).Year) == 0) select s)
更新:
getfiles = (from string s in files where (DateTime.Now.Day - Convert.ToInt32(File.GetCreationTime(Path.Combine(filenamepath, s)).AddDays(-30).Day) < 1) && ((DateTime.Now.Year - (File.GetCreationTime(Path.Combine(filenamepath, s))).Year) == 0) select s).ToList();
答案 1 :(得分:0)
示例代码:我在想VB的东西。但是,这应该做你需要的吗?
string filenamepath = @"C:\";
List<String> files = new List<String>();
//change this TimeSpan based on your variable?
var timespan = new TimeSpan(30, 0,0,0,0);
var dir = new DirectoryInfo(filenamepath);
files = dir.GetFiles().Where(f => f.CreationTime.Add(timespan) > DateTime.Now).Select(f => f.Name).ToList();