CSVファイルフィルタからテーブルSqlite C＃に挿入

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sqliteで2つのテーブルを持つデータベースを作成しました。データベースに挿入する必要のあるかなり特殊なCSVファイルがあります。テーブル 'hyddnev'列 '駅'（駅の番号はファイルから各行の最初の要素です）と 'Dat'に挿入する必要があります（年はファイルからの各行の2番目の要素で、mounthの日は3番目の要素ファイルからの各行の最初の行は1日目、2行目は2日目から31日目です）。数日後、私は1月から12月のmounthsの値を持つ12の列を持っています。そして、私は駅の№をHydnevテーブルに、列Datを同じテーブルに、日付の値を各行の12列に12月に挿入する必要があります。CSVファイルフィルタからテーブルSqlite C＃に挿入

18050,1976,1,0.390,0.660,0.290,0.740,9.160,1.400,0.670,3.120,0.460,0.420,0.360,0.400, 
18050,1976,2,0.390,0.520,0.290,0.740,7.540,1.270,0.670,2.660,0.460,0.420,0.360,0.380, 
18050,1976,3,0.390,0.450,0.240,0.660,5.260,1.270,0.670,2.510,0.460,0.420,0.410,0.400, 
18050,1976,4,0.390,0.450,0.240,0.660,4.400,1.180,0.620,2.360,0.460,0.410,0.400,0.440, 
18050,1976,5,0.390,0.450,0.290,0.660,4.220,1.080,0.620,2.360,0.460,0.410,0.400,4.750, 
18050,1976,6,0.520,0.390,0.240,0.580,4.040,1.270,0.620,4.200,0.460,0.410,0.380,2.810, 
18050,1976,7,0.390,0.390,0.240,0.520,3.680,37.800,0.620,5.870,0.460,0.400,0.360,1.620, 
18050,1976,8,0.390,0.390,0.200,0.580,3.330,22.900,0.580,4.570,0.460,0.380,0.360,0.980, 
18050,1976,9,0.390,0.390,0.200,0.660,2.830,11.200,0.580,4.020,0.460,0.360,0.360,0.740, 
18050,1976,10,0.390,0.340,0.200,1.380,2.650,8.120,0.580,3.660,0.440,0.360,0.360,0.520, 
18050,1976,11,0.340,0.390,0.200,2.260,2.350,5.870,0.580,3.270,0.440,0.360,0.360,0.460, 
18050,1976,12,0.340,0.450,0.200,1.700,2.350,4.750,0.580,4.570,0.440,0.360,0.360,0.460, 
18050,1976,13,0.340,0.390,0.200,1.590,2.350,3.840,0.540,4.020,0.440,0.340,0.360,0.440, 
18050,1976,14,0.340,0.390,0.290,2.120,2.200,3.120,0.540,3.660,0.420,0.340,0.340,0.520, 
18050,1976,15,0.290,0.390,0.290,2.400,2.050,2.970,0.540,3.270,0.420,0.400,0.340,0.520, 
18050,1976,16,0.290,0.390,0.240,1.590,1.770,2.810,0.540,2.970,0.420,0.360,0.340,0.440, 
18050,1976,17,0.290,0.340,0.290,1.170,1.520,2.660,0.540,2.660,0.410,0.360,0.330,0.420, 
18050,1976,18,0.290,0.340,0.290,1.170,1.270,2.360,0.540,2.210,0.410,0.410,0.340,0.420, 
18050,1976,19,0.240,0.340,0.390,1.170,1.080,2.210,0.540,2.060,0.410,0.410,0.400,0.410, 
18050,1976,20,0.290,0.340,0.390,1.010,1.080,2.060,0.520,1.760,0.400,0.400,1.340,0.400, 
18050,1976,21,0.290,0.290,0.390,0.920,1.270,1.760,0.520,1.200,0.740,0.400,2.660,0.400, 
18050,1976,22,0.340,0.290,0.450,0.820,2.860,1.480,0.520,1.080,0.580,0.380,1.760,0.400, 
18050,1976,23,0.340,0.290,0.520,0.740,3.050,1.200,0.520,0.980,0.580,0.380,0.980,0.400, 
18050,1976,24,0.340,0.290,0.520,0.660,4.000,0.980,0.540,0.810,0.540,0.380,0.520,0.380, 
18050,1976,25,0.340,0.290,0.920,0.740,2.680,0.890,2.810,0.670,0.520,0.360,0.460,0.380, 
18050,1976,26,0.390,0.290,1.380,1.380,2.060,0.810,2.510,0.580,0.520,0.360,0.440,0.380, 
18050,1976,27,0.740,0.290,1.490,2.570,1.770,0.810,2.510,0.580,0.490,0.360,0.420,0.380, 
18050,1976,28,1.280,0.290,1.380,2.730,1.770,0.740,4.750,0.520,0.460,0.360,0.410,0.360, 
18050,1976,29,1.010,0.290,1.090,3.610,1.650,0.740,5.480,0.520,0.420,0.360,0.410,0.360, 
18050,1976,30,0.820,,0.820,4.000,1.520,0.670,4.210,0.490,0.420,0.360,0.400,0.360, 
18050,1976,31,0.660,,0.740,,1.520,,3.660,0.460,,0.360,,0.440,

私はいけない..

Constraint failed 
NOT NULL constraint failed: hyddnev.Dat 

Constraint failed 
NOT NULL constraint failed: hyddnev.Station

CSVファイルには、1976年から2015年までの年が含まれており、各年の31行を持っている：今の私は、駅と日付の№を挿入しようが、私は例外を持っていますテーブルに挿入する方法を知っている、私は選択クエリでグラフィックスを描画するために使用する後に挿入する必要があります。

マイコード：

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.IO; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using System.Windows.Forms; 
using System.Data.SQLite; 

namespace WindowsFormsApp1 
{ 
    public partial class Form1 : Form 
    { 
     private SQLiteConnection Connection; 

     public Form1() 
     { 
      InitializeComponent(); 

      label3.Hide(); 
      label4.Hide(); 

      SQLiteConnection.CreateFile("hydrodb.sqlite"); 
      SQLiteConnection Connection = new SQLiteConnection("Data Source=hydrodb.sqlite;Version=3;"); 
      Connection.Open(); 

      string createTable = ("CREATE TABLE hyddnev (Station UNSIGNED INT(5) NOT NULL, Dat datetime NOT NULL, Stoej int(5) DEFAULT NULL, Vkol UNSIGNED FLOAT(7,3) DEFAULT NULL, PRIMARY KEY (Station, Dat))"); 
      SQLiteCommand createHydDnev = new SQLiteCommand(createTable, Connection); 
      createHydDnev.ExecuteNonQuery(); 

      string createTable2 = ("CREATE TABLE hydmes (Station UNSIGNED INT(5) NOT NULL, Dat datetime NOT NULL, StoejMin smallint(5) DEFAULT NULL, VkolMin UNSIGNED FLOAT(7,3) DEFAULT NULL, StoejSre smallint(5) DEFAULT NULL, VkolSre UNSIGNED FLOAT(7,3) DEFAULT NULL, StoejMax smallint(5) DEFAULT NULL, VkolMax UNSIGNED FLOAT(7,3) DEFAULT NULL, PRIMARY KEY (Station, Dat))"); 
      SQLiteCommand createHydMes = new SQLiteCommand(createTable2, Connection); 
      createHydMes.ExecuteNonQuery(); 

      string deleteTable = ("DELETE FROM hyddnev"); 
      SQLiteCommand deleteHydDnev = new SQLiteCommand(deleteTable, Connection); 
      deleteHydDnev.ExecuteNonQuery(); 

      string deleteTable2 = ("DELETE FROM hydmes"); 
      SQLiteCommand deleteHydMes = new SQLiteCommand(deleteTable2, Connection); 
      deleteHydMes.ExecuteNonQuery(); 

      this.Connection = Connection; 
     } 

     string pathFolder; 
     string pathFolder2; 

     string resultStation; 
     string resultStation2; 

     List<string> resultYears = new List<string>(); 
     List<string> resultYears2 = new List<string>(); 

     private void button1_Click(object sender, EventArgs e) 
     { 
      using (OpenFileDialog dialog = new OpenFileDialog()) 
      { 
       if (dialog.ShowDialog(this) == DialogResult.OK) 
       { 
        string sFileName = dialog.FileName; 
        pathFolder = sFileName; 

        label3.Text = pathFolder; 
        label3.Show();     

        string[] lines = System.IO.File.ReadAllLines(dialog.FileName); 

        int i = 0; 

        foreach (var line in lines) 
        { 

         var splittedValues = line.Split(','); 

         var firstWord = splittedValues[0]; 
         var firstYear = splittedValues[1]; 

         if (!resultYears.Contains(firstYear)) 
         { 
          resultYears.Add(firstYear); 
         } 

         if (i == 0) 
         { 
          resultStation = firstWord; 
         } 
         else 
         { 
          if (resultStation != firstWord) 
          { 
           MessageBox.Show("Файла с дневни данни трябва да съдържа само една станция!"); 
           return; 
          } 
         } 
         i++; 

         string addDat = ("INSERT INTO hyddnev (Dat) values ('" + resultYears + "')"); 
         SQLiteCommand insertDat = new SQLiteCommand(addDat, Connection); 

         try 
         { 
          insertDat.ExecuteNonQuery(); 
         } 
         catch (Exception ex) 
         { 

          MessageBox.Show(ex.Message); 
         } 

         string addStation = ("INSERT INTO hyddnev (Station) values(" + firstWord + ")"); 
         SQLiteCommand insertStation = new SQLiteCommand(addStation, Connection); 

         try 
         { 
          insertStation.ExecuteNonQuery(); 
         } 
         catch (Exception ex) 
         { 

          MessageBox.Show(ex.Message); 
         } 

        } 
        resultYears.Sort(); 
       } 
      } 
     } 

     private void button2_Click(object sender, EventArgs e) 
     { 
      using (OpenFileDialog dialog = new OpenFileDialog()) 
      { 
       if (dialog.ShowDialog(this) == DialogResult.OK) 
       { 
        string sFileName = dialog.FileName; 
        pathFolder2 = sFileName; 

        label4.Text = pathFolder2; 
        label4.Show(); 

        string[] lines = System.IO.File.ReadAllLines(dialog.FileName); 

        int i = 0; 

        foreach (var line in lines) 
        { 
         var splittedValues = line.Split(','); 

         var firstWord = splittedValues[0]; 
         var firstYear2 = splittedValues[1]; 

         if (!resultYears2.Contains(firstYear2)) 
         { 
          resultYears2.Add(firstYear2); 
         } 

         if (i == 0) 
         { 
          resultStation2 = firstWord; 
         } 
         else 
         { 
          if (resultStation2 != firstWord) 
          { 
           MessageBox.Show("Файла с месечни данни трябва съдържа само една станция!"); 
           return; 
          } 
         } 

         i++; 
        } 

        resultYears2.Sort(); 
       } 
      } 
     } 

     public void label3_Click(object sender, EventArgs e) 
     { 

     } 

     public void label4_Click(object sender, EventArgs e) 
     { 

     } 

     private void button3_Click(object sender, EventArgs e) 
     { 
      if (resultStation != resultStation2) 
      { 
       MessageBox.Show("Номера на станцията в единия файл не отговаря на номера на станцията в другият файл!" + Environment.NewLine + Environment.NewLine + 
        "ЗАБЕЛЕЖКА!" + Environment.NewLine + Environment.NewLine + "В двата файла, номера на станцията трябва да бъде един и същ!"); 
      } 

      comboBox1.Items.Add(resultStation); 

      if (string.Join(", ", resultYears) == string.Join(", ", resultYears2)) 
      //if (resultYears.Equals(resultYears2)) 
      { 
       for (int i = 0; i < this.resultYears.Count; i++) 
       { 
        comboBox2.Items.Add(resultYears[i]); 
       } 
      } 
      else 
      { 
       MessageBox.Show("Годините от двата файла не съвпадат."); 
      } 

     } 
    } 
}

出典

2017-04-13 Валерия Благовест

は、CSVファイルのヘッダーた行をしていますか？

あなたのCSVファイルの列は何ですか？

CSVファイルにカラムヘッダーがある場合は、CSVファイルを直接データテーブルにロードし、そのテーブルを単純に照会できます。 See this: Loading CSV file in data table (then query/apply filters on data table to extract required data)

注：「HDR = Yes/No」と「Data Source = CSVファイルへのパス」に注意してください。

出典

2017-04-13 08:15:20 Ketan

// using System.Data; // using System.Data.OleDb; // using System.Globalization; // using System.IO; static DataTable GetDataTableFromCsv(string path, bool isFirstRowHeader) { string header = isFirstRowHeader ? "Yes" : "No"; string pathOnly = Path.GetDirectoryName(path); string fileName = Path.GetFileName(path); string sql = @"SELECT * FROM [" + fileName + "]"; using(OleDbConnection connection = new OleDbConnection( @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathOnly + ";Extended Properties=\"Text;HDR=" + header + "\"")) using(OleDbCommand command = new OleDbCommand(sql, connection)) using(OleDbDataAdapter adapter = new OleDbDataAdapter(command)) { DataTable dataTable = new DataTable(); dataTable.Locale = CultureInfo.CurrentCulture; adapter.Fill(dataTable); return dataTable; } }

ファイルヘッダ行を有し、列は –

さて、と分離されている、しかし、あなたは「」で分離されたデータの固定列と配列データを仮定されなければなりません。 HDR = NOを選択する必要があります（列ヘッダーとして最初の行がないため）。また、CSVをデータテーブルに取り込みながら列に名前を割り当てることもできます。それ以上の説明が必要な場合は教えてください – Ketan

CSVファイルフィルタからテーブルSqlite C＃に挿入

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