c# – SQLite / ADO.NET-数据适配器没有向SQLite文件写入正确的行数
作者：互联网
继续我将程序输出从CSV转换为SQLite的传奇,我遇到了另一个问题.我正在获取一个文本文件,按行和逗号分解,并将其结果放入列表中.然后我遵循this教程,了解如何使用ADO.NET DataSet和.NET数据提供程序将数据插入表中,因为我之前的方法没有正确创建表.
文件中的行读取器返回它读取134行,这是文件中正确的行数(顺便说一句,可以找到here …您将从使用它进行测试中受益).此外,为将数据加载到数据适配器而创建的DataTable对象也总共读取134行.但是,当打开文件并查看其中的内容(我一直在使用wxSQLite时)时,行并不是全部.写入的行数有所不同,但不可避免地为134.此外,跨行应用的数据类型不一致.奇数行中的数据字段与我在创建表时输入的模式保持一致,但偶数行会遭受所有整数类型行的转换.我不太确定是什么导致了这一点,并且偏离了教程的代码,但原则应该仍然是相同的.这可能是简单而愚蠢的事情(我很擅长犯这些错误),但是我的博士生导师看不出任何明显错误的实施.
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SQLite;
using System.IO;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
namespace C_Sharp_SQLite_Testbed{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window{
private static string fileName;
private static string dataName;
public static string[] lines;
public MainWindow(){
InitializeComponent();
}
private void btnLoad_Click(object sender, RoutedEventArgs e){
//open input file
string dateTime = DateTime.Today.ToString("dd_mm_yyyy");
Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog();
dlg.FileName = "Document";
dlg.DefaultExt = ".txt";
dlg.Filter = "Text Documents (.txt)|*.txt";
Nullable<bool> result = dlg.ShowDialog();
string inputFilePath = dlg.FileName;
if (result == true){
//check for input in the table name textbox
if(txtTableName.GetLineLength(0) == 0){
string errorBoxText = "Please enter a name for the table.";
string caption = "Error";
MessageBox.Show(errorBoxText, caption, MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
//create save dialog box for .db file
//create output file
Microsoft.Win32.SaveFileDialog sdg = new Microsoft.Win32.SaveFileDialog();
sdg.FileName = "databaseName";
sdg.DefaultExt = ".db";
sdg.Filter = "SQLite3 Database File (.db)|*.db";
Nullable<bool> saveResult = sdg.ShowDialog();
if (saveResult == true){
string saveFileName = sdg.FileName;
string cs = string.Format("URI=file:{0}", saveFileName);
string tableName = txtTableName.Text;
int i = 0;
#region SQLite logic
#region create table
using (SQLiteConnection con = new SQLiteConnection(cs)){
con.Open();
using (SQLiteCommand cmd = new SQLiteCommand(con)){
cmd.CommandText = string.Format(@"CREATE TABLE {0} (Timestamp INTEGER PRIMARY KEY, LeftHipState INTEGER NOT NULL, LeftHipX REAL, LeftHipY REAL, LeftHipZ REAL, LeftKneeState INTEGER NOT NULL, LeftKneeX REAL, LeftKneeY REAL, LeftKneeZ REAL, LeftAnkleState INTEGER NOT NULL, LeftAnkleX REAL, LeftAnkleY REAL, LeftAnkleZ REAL, LeftFootState INTEGER NOT NULL, LeftFootX REAL, LeftFootY REAL, LeftFootZ REAL, RightHipState INTEGER NOT NULL, RightHipX REAL, RightHipY REAL, RightHipZ REAL, RightKneeState INTEGER NOT NULL, RightKneeX REAL, RightKneeY REAL, RightKneeZ REAL, RightAnkleState INTEGER NOT NULL, RightAnkleX REAL, RightAnkleY REAL, RightAnkleZ REAL, RightFootState INTEGER NOT NULL, RightFootX REAL, RightFootY REAL, RightFootZ REAL, LeftKneeFlexion REAL, LeftKneeValgus REAL, RightKneeFlexion REAL, RightKneeValgus REAL)",
txtTableName.Text);
Console.WriteLine(cmd.CommandText);
cmd.ExecuteNonQuery();
}
con.Close();
}
#endregion
using (SQLiteConnection con = new SQLiteConnection(cs)){
DataTable table = new DataTable(tableName);
#region create columns
table.Columns.Add("Timestamp", System.Type.GetType("System.String"));
//------------------------------------------------------------------
table.Columns.Add("LeftHipState", System.Type.GetType("System.Int32"));
table.Columns.Add("LeftHipX", System.Type.GetType("System.Double"));
table.Columns.Add("LeftHipY", System.Type.GetType("System.Double"));
table.Columns.Add("LeftHipZ", System.Type.GetType("System.Double"));
table.Columns.Add("LeftKneeState", System.Type.GetType("System.Int32"));
table.Columns.Add("LeftKneeX", System.Type.GetType("System.Double"));
table.Columns.Add("LeftKneeY", System.Type.GetType("System.Double"));
table.Columns.Add("LeftKneeZ", System.Type.GetType("System.Double"));
table.Columns.Add("LeftAnkleState", System.Type.GetType("System.Int32"));
table.Columns.Add("LeftAnkleX", System.Type.GetType("System.Double"));
table.Columns.Add("LeftAnkleY", System.Type.GetType("System.Double"));
table.Columns.Add("LeftAnkleZ", System.Type.GetType("System.Double"));
table.Columns.Add("LeftFootState", System.Type.GetType("System.Int32"));
table.Columns.Add("LeftFootX", System.Type.GetType("System.Double"));
table.Columns.Add("LeftFootY", System.Type.GetType("System.Double"));
table.Columns.Add("LeftFootZ", System.Type.GetType("System.Double"));
//-------------------------------------------------------------------
table.Columns.Add("RightHipState", System.Type.GetType("System.Int32"));
table.Columns.Add("RightHipX", System.Type.GetType("System.Double"));
table.Columns.Add("RightHipY", System.Type.GetType("System.Double"));
table.Columns.Add("RightHipZ", System.Type.GetType("System.Double"));
table.Columns.Add("RightKneeState", System.Type.GetType("System.Int32"));
table.Columns.Add("RightKneeX", System.Type.GetType("System.Double"));
table.Columns.Add("RightKneeY", System.Type.GetType("System.Double"));
table.Columns.Add("RightKneeZ", System.Type.GetType("System.Double"));
table.Columns.Add("RightAnkleState", System.Type.GetType("System.Int32"));
table.Columns.Add("RightAnkleX", System.Type.GetType("System.Double"));
table.Columns.Add("RightAnkleY", System.Type.GetType("System.Double"));
table.Columns.Add("RightAnkleZ", System.Type.GetType("System.Double"));
table.Columns.Add("RightFootState", System.Type.GetType("System.Int32"));
table.Columns.Add("RightFootX", System.Type.GetType("System.Double"));
table.Columns.Add("RightFootY", System.Type.GetType("System.Double"));
table.Columns.Add("RightFootZ", System.Type.GetType("System.Double"));
//-------------------------------------------------------------------
table.Columns.Add("LeftKneeFlexion", System.Type.GetType("System.Double"));
table.Columns.Add("LeftKneeValgus", System.Type.GetType("System.Double"));
table.Columns.Add("RightKneeFlexion", System.Type.GetType("System.Double"));
table.Columns.Add("RightKneeValgus", System.Type.GetType("System.Double"));
#endregion
var output = new List<MyData>();
foreach (var line in File.ReadAllLines(inputFilePath)){
output.Add(new MyData(line.Split(',')));
}
foreach (MyData outputLine in output){
DataRow row = table.NewRow();
row["Timestamp"] = outputLine.Time;
row["LeftHipState"] = outputLine.HlState;
row["LeftHipX"] = outputLine.HLX;
row["LeftHipY"] = outputLine.HLY;
row["LeftHipZ"] = outputLine.HLZ;
row["LeftKneeState"] = outputLine.KlState;
row["LeftKneeX"] = outputLine.KLX;
row["LeftKneeY"] = outputLine.KLY;
row["LeftKneeZ"] = outputLine.KLZ;
row["LeftAnkleState"] = outputLine.AlState;
row["LeftAnkleX"] = outputLine.ALX;
row["LeftAnkleY"] = outputLine.ALY;
row["LeftAnkleZ"] = outputLine.ALZ;
row["LeftFootState"] = outputLine.FlState;
row["LeftFootX"] = outputLine.FLX;
row["LeftFootY"] = outputLine.FLY;
row["LeftFootZ"] = outputLine.FLZ;
row["RightHipState"] = outputLine.HrState;
row["RightHipX"] = outputLine.HRX;
row["RightHipY"] = outputLine.HRY;
row["RightHipZ"] = outputLine.HRZ;
row["RightKneeState"] = outputLine.KrState;
row["RightKneeX"] = outputLine.KRX;
row["RightKneeY"] = outputLine.KRY;
row["RightKneeZ"] = outputLine.KRZ;
row["RightAnkleState"] = outputLine.ArState;
row["RightAnkleX"] = outputLine.ARX;
row["RightAnkleY"] = outputLine.ARY;
row["RightAnkleZ"] = outputLine.ARZ;
row["RightFootState"] = outputLine.FrState;
row["RightFootX"] = outputLine.FRX;
row["RightFootY"] = outputLine.FRY;
row["RightFootZ"] = outputLine.FRZ;
row["LeftKneeFlexion"] = outputLine.LKFX;
row["LeftKneeValgus"] = outputLine.LKVG;
row["RightKneeFlexion"] = outputLine.RKFX;
row["RightKneeValgus"] = outputLine.RKVG;
table.Rows.Add(row);
i++;
Console.WriteLine("{0}| {1} {2:N4} {3:N4} {4:N4}| {5} {6:N4} {7:N4} {8:N4}| {9} {10:N4} {11:N4} {12:N4}| {13} {14:N4} {15:N4} {16:N4}| {17} {18:N4} {19:N4} {20:N4}| {21} {22:N4} {23:N4} {24:N4}| {25} {26:N4} {27:N4} {28:N4}| {29} {30:N4} {31:N4} {32:N4}| {33:N2} {34:N2} {35:N2} {36:N2}\n",
outputLine.Time, outputLine.HlState, outputLine.HLX, outputLine.HLY, outputLine.HLZ, outputLine.KlState, outputLine.KLX, outputLine.KLY, outputLine.KLZ, outputLine.AlState, outputLine.ALX, outputLine.ALY, outputLine.ALZ, outputLine.FlState, outputLine.FLX, outputLine.FLY, outputLine.FLZ, outputLine.HrState, outputLine.HRX, outputLine.HRY, outputLine.HRZ, outputLine.KrState, outputLine.KRX, outputLine.KRY, outputLine.KRZ, outputLine.ArState, outputLine.ARX, outputLine.ARY, outputLine.ARZ, outputLine.FrState, outputLine.FRX, outputLine.FRY, outputLine.FRZ, outputLine.LKFX, outputLine.LKVG, outputLine.RKFX, outputLine.RKVG);
}
Console.WriteLine("{0}, {1}", i, table.Rows.Count);
string sql = string.Format("SELECT * FROM {0}", tableName);
using (SQLiteDataAdapter da = new SQLiteDataAdapter(sql, con)){
using (new SQLiteCommandBuilder(da)){
da.Update(table);
}
}
con.Close();
#endregion
}
}
#region
//for input file
//fileName = dlg.FileName;
//OutputConsole.Text = " ";
//OutputConsole.Text = fileName;
//for output file
//dataName = sdg.FileName;
#endregion
}
}
private void btnExit_Click(object sender, RoutedEventArgs e){
Environment.Exit(0);
}
private void btnInfo_Click(object sender, RoutedEventArgs e){
Environment.CurrentDirectory = Environment.GetEnvironmentVariable("windir");
DirectoryInfo info = new DirectoryInfo(".");
lock (info){
OutputConsole.Text = String.Format("Directory info: " + info.FullName);
}
}
}
public class MyData{
public MyData(string[] values){
Time = int.Parse(values[0]);
HlState = int.Parse(values[1]);
HLX = double.Parse(values[2]);
HLY = double.Parse(values[3]);
HLZ = double.Parse(values[4]);
KlState = int.Parse(values[5]);
KLX = double.Parse(values[6]);
KLY = double.Parse(values[7]);
KLZ = double.Parse(values[8]);
AlState = int.Parse(values[9]);
ALX = double.Parse(values[10]);
ALY = double.Parse(values[11]);
ALZ = double.Parse(values[12]);
FlState = int.Parse(values[13]);
FLX = double.Parse(values[14]);
FLY = double.Parse(values[15]);
FLZ = double.Parse(values[16]);
HrState = int.Parse(values[17]);
HRX = double.Parse(values[18]);
HRY = double.Parse(values[19]);
HRZ = double.Parse(values[20]);
KrState = int.Parse(values[21]);
KRX = double.Parse(values[22]);
KRY = double.Parse(values[23]);
KRZ = double.Parse(values[24]);
ArState = int.Parse(values[25]);
ARX = double.Parse(values[26]);
ARY = double.Parse(values[27]);
ARZ = double.Parse(values[28]);
FrState = int.Parse(values[29]);
FRX = double.Parse(values[30]);
FRY = double.Parse(values[31]);
FRZ = double.Parse(values[32]);
LKFX = double.Parse(values[33]);
LKVG = double.Parse(values[34]);
RKFX = double.Parse(values[35]);
RKVG = double.Parse(values[36]);
}
public int Time { get; set; }
public int HlState { get; set; }
public double HLX { get; set; }
public double HLY { get; set; }
public double HLZ { get; set; }
public int KlState { get; set; }
public double KLX { get; set; }
public double KLY { get; set; }
public double KLZ { get; set; }
public int AlState { get; set; }
public double ALX { get; set; }
public double ALY { get; set; }
public double ALZ { get; set; }
public int FlState { get; set; }
public double FLX { get; set; }
public double FLY { get; set; }
public double FLZ { get; set; }
public int HrState { get; set; }
public double HRX { get; set; }
public double HRY { get; set; }
public double HRZ { get; set; }
public int KrState { get; set; }
public double KRX { get; set; }
public double KRY { get; set; }
public double KRZ { get; set; }
public int ArState { get; set; }
public double ARX { get; set; }
public double ARY { get; set; }
public double ARZ { get; set; }
public int FrState { get; set; }
public double FRX { get; set; }
public double FRY { get; set; }
public double FRZ { get; set; }
public double LKFX { get; set; }
public double LKVG { get; set; }
public double RKFX { get; set; }
public double RKVG { get; set; }
}
}
这是微妙的,还是实际上是错的？我需要修复行计数问题和移位数据类型.
这是MainWindow的XAML代码,因此您不必重现它：
<Window x:Class="C_Sharp_SQLite_Testbed.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid Background="LightGray">
<Button x:Name="btnLoad" Content="Load CSV File to Database" HorizontalAlignment="Left" Margin="10,258,0,0" VerticalAlignment="Top" Width="153" Click="btnLoad_Click"/>
<Button x:Name="btnExit" Content="Exit" HorizontalAlignment="Left" Margin="312,258,0,0" VerticalAlignment="Top" Width="75" Click="btnExit_Click"/>
<TextBlock x:Name="OutputConsole" HorizontalAlignment="Left" Margin="10,10,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Height="243" Width="497" Background="Black" Foreground="#FF00E800" FontFamily="Lucida Console"/>
<Button x:Name="btnInfo" Content="Directory Information" HorizontalAlignment="Left" Margin="168,258,0,0" VerticalAlignment="Top" Width="139" Click="btnInfo_Click"/>
<TextBox x:Name="txtTableName" HorizontalAlignment="Left" Height="23" Margin="200,285,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="120"/>
<Label Content="Enter name for table in database:" HorizontalAlignment="Left" Margin="10,282,0,0" VerticalAlignment="Top"/>
</Grid>
</Window>
项目类型是一个控制台项目,因此您需要在打开一个新的WPF项目后进行设置.
或许这是一个愚蠢的问题：在写完这些文件之后我等待打开其中一个文件的时间是多少？
解决方法:
因为这里发布的代码是正确的,所以行数较少的问题是在插入完成之前退出应用程序.
整数显示为小数的问题是由于该工具用于查看SQLite文件,而不是实际的数据库本身.
标签：c,sqlite,ado-net,dataadapter 来源： https://codeday.me/bug/20190709/1409595.html