.net r SQLite SQL til M$SQL Server sqlstr=replaceCaseSensitive(sqlstr,“]布尔值,“]位”); sqlstr=replaceCaseSensitive(sqlstr,“]BLOB”,“]varbi
r SQLite SQL til M$SQL Server sqlstr=replaceCaseSensitive(sqlstr,“]布尔值,“]位”); sqlstr=replaceCaseSensitive(sqlstr,“]BLOB”,“]varbinary(max)”;//注意,maks 2 GB i varbinary(最大)kolonner sqlstr=replaceCase不敏感(sqlstr,“]VARCHAR”,“]nvarchar”); sqlstr=replaceCasensitive(sqlstr,“]nvarchar,”,“]nvarchar(max),”; sqlstr=replaceCaseSensitive(sqlstr,“]nvarchar\r”,“]nvarchar(max)\r”);//风箱 sqlstr=replaceCaseSensitive(sqlstr,“]nvarchar\n”,“]nvarchar(max)\n”);//Case-linux sqlstr=replaceCaseSensitive(sqlstr,“]INTEGER”,“]int”); sqlstr=replaceCaseSensitive(sqlstr,“]TEXT”,“]nvarchar(max)”; SqlCommand sqlcmd=新的SqlCommand(sqlstr,m_sqlcon); sqlcmd.ExecuteNonQuery(); sqlcmd.Dispose(); List columns=getSQLiteSchema(tablename); //将所有行复制到MS SQL Server 传输(表名、列); } 其他的 Console.WriteLine(“表已存在:“+tablename”); } } } }.net r SQLite SQL til M$SQL Server sqlstr=replaceCaseSensitive(sqlstr,“]布尔值,“]位”); sqlstr=replaceCaseSensitive(sqlstr,“]BLOB”,“]varbi,.net,sql-server,sqlite,.net,Sql Server,Sqlite,r SQLite SQL til M$SQL Server sqlstr=replaceCaseSensitive(sqlstr,“]布尔值,“]位”); sqlstr=replaceCaseSensitive(sqlstr,“]BLOB”,“]varbinary(max)”;//注意,maks 2 GB i varbinary(最大)kolonner sqlstr=replaceCase不敏感(sqlstr,“]VARCHAR”,“]nvarchar”); sqlstr=replaceCase
您可以使用来遍历行。感谢您提供了这段伟大的实用程序代码。我只发现了一个小问题。您使用的replace语句出错,因为我选择进行反向工程和导入的表没有['方括号用于分隔字段名…小改动…但仍然是一段非常有价值的代码。方括号主要用于包含空格的列。我猜SQLite驱动程序的版本可能会在不同的表模式下输出(带括号或不带括号)。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SQLite;
using System.Data.SqlClient;
using System.Data;
namespace SQLite2MSSQL
{
class Program
{
private static SQLiteConnection m_sqlitecon;
private static SqlConnection m_sqlcon;
private static List<KeyValuePair<string, string>> getSQLiteSchema(string tablename)
{
using (var cmd = new SQLiteCommand("PRAGMA table_info(" + tablename + ");", m_sqlitecon))
{
var table = new DataTable();
SQLiteDataAdapter adp = null;
try
{
adp = new SQLiteDataAdapter(cmd);
adp.Fill(table);
List<KeyValuePair<string, string>> res = new List<KeyValuePair<string, string>>();
for (int i = 0; i < table.Rows.Count; i++)
{
string key = table.Rows[i]["name"].ToString();
string value = table.Rows[i]["type"].ToString();
KeyValuePair<string, string> kvp = new KeyValuePair<string, string>(key, value);
res.Add(kvp);
}
return res;
}
catch (Exception ex) { Console.WriteLine(ex.Message); }
}
return null;
}
private static void transfer(string tablename, List<KeyValuePair<string, string>> schema)
{
using (SQLiteCommand cmd = new SQLiteCommand("select * from " + tablename, m_sqlitecon))
{
using (SQLiteDataReader reader = cmd.ExecuteReader())
{
while (reader.Read())
{
StringBuilder sql = new StringBuilder();
sql.Append("insert into " + tablename + " (");
bool first = true;
foreach (KeyValuePair<string, string> column in schema)
{
if (first)
first=false;
else
sql.Append(",");
sql.Append("["+column.Key+"]");
}
sql.Append(") Values(");
first = true;
foreach (KeyValuePair<string, string> column in schema)
{
if (first)
first = false;
else
sql.Append(",");
sql.Append("@");
sql.Append(column.Key);
}
sql.Append(");");
try
{
using (SqlCommand sqlcmd = new SqlCommand(sql.ToString(), m_sqlcon))
{
foreach (KeyValuePair<string, string> column in schema)
{
sqlcmd.Parameters.AddWithValue("@" + column.Key, reader[column.Key]);
}
int count = sqlcmd.ExecuteNonQuery();
if (count == 0)
throw new Exception("Unable to insert row!");
}
}
catch (Exception Exception) {
string message = Exception.Message;
int idx = message.IndexOf("Violation of PRIMARY KEY");
if (idx < 0)
throw;
}
}
}
}
}
private static bool SQLTableExists(string tablename)
{
using (SqlCommand cmd = new SqlCommand("SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = '" + tablename + "'", m_sqlcon))
{
using (SqlDataReader reader = cmd.ExecuteReader())
{
if (reader.HasRows)
return true;
}
}
return false;
}
private static string ReplaceCaseInsensitive(string str, string oldValue, string newValue)
{
int prevPos = 0;
string retval = str;
// find the first occurence of oldValue
int pos = retval.IndexOf(oldValue, StringComparison.InvariantCultureIgnoreCase);
while (pos > -1)
{
// remove oldValue from the string
retval = retval.Remove(pos, oldValue.Length);
// insert newValue in its place
retval = retval.Insert(pos, newValue);
// check if oldValue is found further down
prevPos = pos + newValue.Length;
pos = retval.IndexOf(oldValue, prevPos, StringComparison.InvariantCultureIgnoreCase);
}
return retval;
}
static void Main(string[] args)
{
// Connect to SQLite and SQL Server database
m_sqlitecon = new SQLiteConnection("Data Source=C:\\sqlitedatabases\\mydb.sqlite;Version=3;");
m_sqlitecon.Open();
m_sqlcon = new SqlConnection("Data Source=localhost;Initial Catalog=mydb;User Id="+userid+";password="+password+";MultipleActiveResultSets=True");
m_sqlcon.Open();
string sql = "SELECT * FROM sqlite_master WHERE type='table'";
SQLiteCommand command = new SQLiteCommand(sql, m_sqlitecon);
SQLiteDataReader reader = command.ExecuteReader();
List<string> tables = new List<string>();
// Loop through all tables
while (reader.Read())
{
string tablename = reader["name"].ToString();
string sqlstr = reader["sql"].ToString();
// Only create and import table if it does not exist
if (!SQLTableExists(tablename))
{
Console.WriteLine("Creating table: " + tablename);
// Vi retter SQLite SQL til M$ SQL Server
sqlstr = ReplaceCaseInsensitive(sqlstr,"] BOOLEAN", "] bit");
sqlstr = ReplaceCaseInsensitive(sqlstr,"] BLOB", "] varbinary(max)"); // Note, maks 2 GB i varbinary(max) kolonner
sqlstr = ReplaceCaseInsensitive(sqlstr,"] VARCHAR", "] nvarchar");
sqlstr = ReplaceCaseInsensitive(sqlstr, "] nvarchar,", "] nvarchar(max),");
sqlstr = ReplaceCaseInsensitive(sqlstr, "] nvarchar\r", "] nvarchar(max)\r"); // Case windiows
sqlstr = ReplaceCaseInsensitive(sqlstr, "] nvarchar\n", "] nvarchar(max)\n"); // Case linux
sqlstr = ReplaceCaseInsensitive(sqlstr, "] INTEGER", "] int");
sqlstr = ReplaceCaseInsensitive(sqlstr, "] TEXT", "] nvarchar(max)");
SqlCommand sqlcmd = new SqlCommand(sqlstr, m_sqlcon);
sqlcmd.ExecuteNonQuery();
sqlcmd.Dispose();
List<KeyValuePair<string, string>> columns = getSQLiteSchema(tablename);
// Copy all rows to MS SQL Server
transfer(tablename, columns);
}
else
Console.WriteLine("Table already exists: " + tablename);
}
}
}
}