这是我的简单解析应用程序的代码。我收到一条错误，指出“从System.Text.RegularExpressions.Match类型到已知的托管提供程序本机类型不存在映射”。当我从使用Split（'_'）切换到RegEx.Match以定义RNumberE，RNumberD等时，这种情况就开始发生了。感谢任何指导。
using System;
using System.Data;
using System.Data.SQLite;
using System.IO;
using System.Text.RegularExpressions;
using System.Threading;
using System.Collections.Generic;
using System.Linq;
using System.Data.SqlClient;
namespace CMMDataParser
{
internal class Program
{
public static List<string> GetImportedFileList()
{
List<string> ImportedFiles = new List<string>();
using (SqlConnection connect = new SqlConnection(@"Server=SERVER;Database=RX_CMMData;Integrated Security=YES"))
{
connect.Open();
using (SqlCommand fmd = connect.CreateCommand())
{
fmd.CommandText = @"SELECT FileName FROM CMMData;";
fmd.CommandType = CommandType.Text;
SqlDataReader r = fmd.ExecuteReader();
while (r.Read())
{
ImportedFiles.Add(Convert.ToString(r["FileName"]));
}
}
}
return ImportedFiles;
}
private static void Main(string[] args)
{
Console.Title = "John Deere CMM Data Parser";
Console.WriteLine("Preparing CMM Data Parser... done");
Console.WriteLine("Scanning for new CMM data...");
Console.ForegroundColor = ConsoleColor.Gray;
using (SqlConnection con = new SqlConnection(@"Server=FRXSQLDEV;Database=RX_CMMData;Integrated Security=YES"))
{
con.Open();
using (SqlCommand insertCommand = con.CreateCommand())
{
Console.WriteLine("Connecting to SQL server...");
SqlCommand cmdd = con.CreateCommand();
string[] files = Directory.GetFiles(@"C:\Documents and Settings\js91162\Desktop\CMM WENZEL\", "*_*_*.txt", SearchOption.AllDirectories);
List<string> ImportedFiles = GetImportedFileList();
insertCommand.Parameters.Add(new SqlParameter("@FeatType", DbType.String));
insertCommand.Parameters.Add(new SqlParameter("@FeatName", DbType.String));
insertCommand.Parameters.Add(new SqlParameter("@Axis", DbType.String));
insertCommand.Parameters.Add(new SqlParameter("@Actual", DbType.Decimal));
insertCommand.Parameters.Add(new SqlParameter("@Nominal", DbType.Decimal));
insertCommand.Parameters.Add(new SqlParameter("@Dev", DbType.Decimal));
insertCommand.Parameters.Add(new SqlParameter("@TolMin", DbType.Decimal));
insertCommand.Parameters.Add(new SqlParameter("@TolPlus", DbType.Decimal));
insertCommand.Parameters.Add(new SqlParameter("@OutOfTol", DbType.Decimal));
foreach (string file in files.Except(ImportedFiles))
{
var FileNameExt1 = Path.GetFileName(file);
cmdd.Parameters.Clear();
cmdd.Parameters.Add(new SqlParameter("@FileExt", FileNameExt1));
cmdd.CommandText =
@"
IF (EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'RX_CMMData' AND TABLE_NAME = 'CMMData')) BEGIN SELECT COUNT(*) FROM CMMData WHERE FileName = @FileExt; END";
int count = Convert.ToInt32(cmdd.ExecuteScalar());
con.Close();
con.Open();
if (count == 0)
{
Console.WriteLine("Preparing to parse CMM data for SQL import...");
if (file.Count(c => c == '_') > 5) continue;
insertCommand.CommandText =
@"
INSERT INTO CMMData (FeatType, FeatName, Axis, Actual, Nominal, Dev, TolMin, TolPlus, OutOfTol, PartNumber, CMMNumber, Date, FileName)
VALUES (@FeatType, @FeatName, @Axis, @Actual, @Nominal, @Dev, @TolMin, @TolPlus, @OutOfTol, @PartNumber, @CMMNumber, @Date, @FileName);";
string FileNameExt = Path.GetFullPath(file);
string RNumber = Path.GetFileNameWithoutExtension(file);
int index2 = RNumber.IndexOf("~");
Match RNumberE = Regex.Match(RNumber, @"^(R|L)\d{6}(COMP|CRIT|TEST|SU[1-9])(?=_)", RegexOptions.IgnoreCase);
Match RNumberD = Regex.Match(RNumber, @"(?<=_)\d{3}[A-Z]\d{4}|\d{3}[A-Z]\d\w\w\d(?=_)", RegexOptions.IgnoreCase);
Match RNumberDate = Regex.Match(RNumber, @"(?<=_)\d{8}(?=_)", RegexOptions.IgnoreCase);
if (RNumberD.Value == @"") continue;
if (RNumberE.Value == @"") continue;
if (RNumberDate.Value == @"") continue;
if (index2 != -1) continue;
/* string RNumberE = RNumber.Split('_')[0];
string RNumberD = RNumber.Split('_')[1];
string RNumberDate = RNumber.Split('_')[2]; */
DateTime dateTime = DateTime.ParseExact(RNumberDate.Value, "yyyyMMdd", Thread.CurrentThread.CurrentCulture);
string cmmDate = dateTime.ToString("dd-MMM-yyyy");
string[] lines = File.ReadAllLines(file);
bool parse = false;
foreach (string tmpLine in lines)
{
string line = tmpLine.Trim();
if (!parse && line.StartsWith("Feat. Type,"))
{
parse = true;
continue;
}
if (!parse || string.IsNullOrEmpty(line))
{
continue;
}
Console.WriteLine(tmpLine);
foreach (SqlParameter parameter in insertCommand.Parameters)
{
parameter.Value = null;
}
string[] values = line.Split(new[] { ',' });
for (int i = 0; i < values.Length - 1; i++)
{
SqlParameter param = insertCommand.Parameters[i];
if (param.DbType == DbType.Decimal)
{
decimal value;
param.Value = decimal.TryParse(values[i], out value) ? value : 0;
}
else
{
param.Value = values[i];
}
}
insertCommand.Parameters.Add(new SqlParameter("@PartNumber", RNumberE));
insertCommand.Parameters.Add(new SqlParameter("@CMMNumber", RNumberD));
insertCommand.Parameters.Add(new SqlParameter("@Date", cmmDate));
insertCommand.Parameters.Add(new SqlParameter("@FileName", FileNameExt));
insertCommand.ExecuteNonQuery();
insertCommand.Parameters.RemoveAt("@PartNumber");
insertCommand.Parameters.RemoveAt("@CMMNumber");
insertCommand.Parameters.RemoveAt("@Date");
insertCommand.Parameters.RemoveAt("@FileName");
}
}
}
Console.WriteLine("CMM data successfully imported to SQL database...");
}
con.Close();
}
}
}
}
答案 0 :(得分：11)
在原始代码中，RNumberD等是string - 大多数代码（SqlParameter最有可能）可以处理此问题。在修订后的代码中，它是一个正则表达式Match，它是一个复杂的对象，表示匹配的完整状态，不是只是匹配的字符串。我希望您在将其添加为（sql）参数时，只需使用RNumberD.Value（匹配文本的string代替RNumberD：
insertCommand.Parameters.Add(new SqlParameter("@CMMNumber", RNumberD.Value));
（等）