循环中的C＃SQL参数错误

Question

请帮我解决这个问题。我有这个小的应用程序来加载txt文件到一个sql数据库，它与sqlite工作正常。当我移植到SQL时，我开始获取'参数已经声明'的错误。如果任何人都可以帮助我重新组织这段代码，那就太棒了！我需要获得环之类的东西之外的参数定义..

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 JohnDeereCMMDataParser 
{ 
    internal class Program 
    { 


     public static List<string> GetImportedFileList() 
     { 
      List<string> ImportedFiles = new List<string>(); 
      using (SqlConnection connect = new SqlConnection(@"Server=FRXSQLDEV;Database=RX_CMMData;Integrated Security=YES")) 
      { 
       connect.Open(); 
       using (SqlCommand fmd = connect.CreateCommand()) 
       { 

        fmd.CommandText = @"SELECT FileName FROM Import;"; 
        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) 
     { 




      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\", "R.txt*", SearchOption.AllDirectories); 

        insertCommand.Parameters.Add(new SqlParameter("@FeatType", DbType.String)); 
        insertCommand.Parameters.Add(new SqlParameter("@FeatName", DbType.String)); 
        insertCommand.Parameters.Add(new SqlParameter("@Value", 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)); 


         List<string> ImportedFiles = GetImportedFileList(); 

         foreach (string file in files.Except(ImportedFiles)) 


         { 

          var FileNameExt1 = Path.GetFileName(file); 

          cmdd.Parameters.Add(new SqlParameter("@FileExt", FileNameExt1)); 
          cmdd.CommandText = 
           @" 
        IF (EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'RX_CMMData' AND TABLE_NAME = 'Import')) BEGIN SELECT COUNT(*) FROM Import WHERE FileName = @FileExt; END"; 



          int count = Convert.ToInt32(cmdd.ExecuteScalar()); 
          con.Close(); 
          con.Open(); 

          if (count == 0) 
          { 
           Console.WriteLine("Parsing CMM data for SQL database... Please wait."); 


           insertCommand.CommandText = 
            @" 
        INSERT INTO Import (FeatType, FeatName, Value, Actual, Nominal, Dev, TolMin, TolPlus, OutOfTol, PartNumber, CMMNumber, Date, FileName) 
        VALUES  (@FeatType, @FeatName, @Value, @Actual, @Nominal, @Dev, @TolMin, @TolPlus, @OutOfTol, @PartNumber, @CMMNumber, @Date, @FileName);"; 






           string FileNameExt = Path.GetFullPath(file); 
           string RNumber = Path.GetFileNameWithoutExtension(file); 

           string RNumberE = RNumber.Split('_')[0]; 

           string RNumberD = RNumber.Split('_')[1]; 
           string RNumberDate = RNumber.Split('_')[2]; 

           DateTime dateTime = DateTime.ParseExact(RNumberDate, "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(); 

          } 

         } 
         Console.WriteLine("CMM data successfully imported to SQL database..."); 

        } 
        con.Close(); 

      } 
     } 
    } 
} 

仅供参考 - 的部分号码，CMMNumber，日期等从底部的文件名被拉到，我需要在它旁边的桌子各自的记录。

Answer 1

为了您的命令对象，你需要做一个

insertCommand.Parameters.Clear(); 

你做任何

insertCommand.Parameters.Add(); 

调用之前。当您将这些参数添加到集合中时，这些参数会被键入，因此，当您重复使用相同的命令对象并添加一组新参数时，这些键会发生碰撞。或者您可以为每个呼叫创建一个新的Command对象，无论哪个都适合您。