我已经四处寻找，似乎唯一可以解决的问题就是使用LINQ，而我在2005年的视觉效果上并没有这样做。
我正在构建一个程序来读取文件并将它们导入到数据库中，就像它目前设置的那样，它会读取它找到的最新日期。
我想先阅读最早的文件。
有什么方法吗？
这是我的代码
private string mDirectory; // this will hold the directory path you are working on
private string[] mFiles; // this will hold all files in the selected directory
private void ReadData()
{
this.toolStripStatusLabel1.Text = "Preparing To Read Data";
this.Refresh();
string connectionString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};;persist security info=false;Extended Properties=dBase IV", mDirectory);
this.richTextBox1.Text = connectionString;
try
{
foreach (string file in mFiles)
{
mDirectory = @"C:\USERS\DESKTOP\Test Pressure\";
mFiles = System.IO.Directory.GetFiles(mDirectory, "*(WIDE).DBF");
DateTime dt = File.GetLastWriteTime(file);
string newdate = dt.ToString("yyyy-MM-dd HH:mm:ss");
DateTime DBTIME = new DateTime(2014, 01, 01, 00, 00, 00);
string date = String.Format("{0:yyyy-MM-dd HH:mm:ss}", DBTIME);
//this.richTextBox1.Text = date;
if (dt > DBTIME)
{
StringBuilder sb = new StringBuilder(300);
int n = GetShortPathName(file, sb, 300);
if (n == 0) // check for errors
MessageBox.Show(Marshal.GetLastWin32Error().ToString());
else
{ }
string filenameWithoutPath1 = System.IO.Path.GetFileName(sb.ToString());
string queryString = string.Format("SELECT * FROM [" + "{0}]", filenameWithoutPath1);
this.richTextBox1.Text = queryString;
string where = " WHERE BAR > 20.0";
string myquery = queryString + where;
// this.richTextBox1.Text = myquery;
using (OleDbConnection connection = new OleDbConnection(connectionString))
{
OleDbCommand command = new OleDbCommand(myquery, connection);
connection.Open();
OleDbDataReader reader = command.ExecuteReader();
while (reader.Read())
{
if (reader.IsDBNull(1))
{
this.richTextBox1.Text = "Null";
}
else
{
string Query = "REPLACE INTO hp42mis.hydrodata (FILEMOD, DOEYMD,TIMEHMS,DATETIMEM,MARKER,CONTRACT_CODE,STS_00" +
",PIPE,PIPE_NO,STS_01,MAX_PRESB,STS_02,MIN_PRESSB,STS_03,TESTP_BAR,STS_04,five,STS_05,six,STS_06,seven,STS_07," +
"eight,STS_08,nine,STS_09) values ('" + newdate.ToString() + "',";
Query += "'" + Convert.ToDateTime(reader["Date"]).ToString("yyyy-MM-dd") + "'";
Query += ",'" + reader.GetValue(1).ToString() + "'";
Query += ",'" + Convert.ToDateTime(reader["Date"]).ToString("yyyy-MM-dd") + " " + reader.GetValue(1).ToString() + "'";
Query += ",'" + reader.GetValue(2).ToString() + "'";
Query += ",'" + reader.GetValue(3).ToString() + "'";
Query += ",'" + reader.GetValue(4).ToString() + "'";
Query += ",'" + reader.GetValue(5).ToString() + "'";
Query += ",'" + reader.GetValue(3).ToString() + "" + reader.GetValue(5).ToString() + "'";
Query += ",'" + reader.GetValue(6).ToString() + "'";
Query += ",'" + reader.GetValue(7).ToString() + "'";
Query += ",'" + reader.GetValue(8).ToString() + "'";
Query += ",'" + reader.GetValue(9).ToString() + "'";
Query += ",'" + reader.GetValue(10).ToString() + "'";
Query += ",'" + reader.GetValue(11).ToString() + "'";
Query += ",'" + reader.GetValue(12).ToString() + "'";
Query += ",'" + reader.GetValue(13).ToString() + "'";
Query += ",'" + reader.GetValue(14).ToString() + "'";
Query += ",'" + reader.GetValue(15).ToString() + "'";
Query += ",'" + reader.GetValue(16).ToString() + "'";
Query += ",'" + reader.GetValue(17).ToString() + "'";
Query += ",'" + reader.GetValue(18).ToString() + "'";
Query += ",'" + reader.GetValue(19).ToString() + "'";
Query += ",'" + reader.GetValue(20).ToString() + "'";
Query += ",'" + reader.GetValue(21).ToString() + "'";
Query += ",'" + reader.GetValue(22).ToString() + "'";
Query += ")";
MySqlCommand cmd = new MySqlCommand(Query, conne);
this.richTextBox1.Text = Query;
this.Refresh();
int res = 0;
try
{
res = cmd.ExecuteNonQuery();
}
catch (MySqlException Myex)
{
MessageBox.Show(Myex.Message);
}
rowcounter++;
this.rowcount.Text = rowcounter.ToString();
this.Refresh();
conne.Dispose();
conne.Close();
}
}
reader.Close();
connection.Close();
}
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
答案 0 :(得分：2)
我找到了一种更简单的方法来排序文件数组...
mFiles = System.IO.Directory.GetFiles(mDirectory, "*(WIDE).DBF");
Array.Sort(mFiles);
答案 1 :(得分：0)
如果您想根据每个文件的上次写入时间遍历mFiles数组，请参阅Sort List using string without Linq：
private IList<string> GetOrderedFiles(string[] files)
{
var fileList = new List<string>(files);
Comparison<string> compare = delegate(string file1, string file2)
{
DateTime file1Time = File.GetLastWriteTime(file1);
DateTime file2Time = File.GetLastWriteTime(file2);
return file1Time.CompareTo(file2Time);
};
fileList.Sort(compare);
return fileList;
}
用法：
var sortedFiles = GetOrderedFiles(mFiles);
foreach (string file in sortedFiles)
{
}
答案 2 :(得分：0)
正如其他人所说的那样，该代码需要重新格式化，甚至可能不正确（例如，您在循环中设置mFiles迭代mFiles）。
但是，这可能会有所帮助吗？
关键是使用FileInfo项而不仅仅是GetFiles（）。
答案 3 :(得分：0)
你可以这样做：
public class ReverseComparer : IComparer<FileSystemInfo>
{
public int Compare(FileSystemInfo x, FileSystemInfo y)
{
return x.CreationTime.CompareTo(y);
}
}
DirectoryInfo di = new DirectoryInfo("C:\\...");
FileSystemInfo[] files = di.GetFileSystemInfos();
Array.Sort(files, new ReverseComparer());