// 创建一个 SQLiteConnection 对象
using (var connection = new SQLiteConnection("Data Source=mydatabase.sqlite"))
{// 打开数据库连接connection.Open();// 查询所有表名var tableNames = new List<string>();var tablesCommand = new SQLiteCommand("SELECT name FROM sqlite_master WHERE type='table'", connection);using (var tablesReader = tablesCommand.ExecuteReader()){while (tablesReader.Read()){tableNames.Add(tablesReader.GetString(0));}}// 遍历所有表，生成导出 SQLvar exportSql = new StringWriter();foreach (var tableName in tableNames){// 查询表结构var schemaCommand = new SQLiteCommand($"PRAGMA table_info({tableName})", connection);var schemaReader = schemaCommand.ExecuteReader();// 生成 CREATE TABLE 语句exportSql.WriteLine($"-- Table: {tableName}");exportSql.Write("CREATE TABLE ");exportSql.Write(tableName);exportSql.Write(" (");bool firstColumn = true;while (schemaReader.Read()){string columnName = schemaReader.GetString(1);string columnType = schemaReader.GetString(2);bool notNull = !schemaReader.IsDBNull(3) && schemaReader.GetInt32(3) != 0;bool primaryKey = !schemaReader.IsDBNull(5) && schemaReader.GetInt32(5) != 0;if (!firstColumn){exportSql.Write(",");}exportSql.Write(columnName);exportSql.Write(" ");exportSql.Write(columnType);if (notNull){exportSql.Write(" NOT NULL");}if (primaryKey){exportSql.Write(" PRIMARY KEY");}firstColumn = false;}exportSql.Write(");");exportSql.WriteLine();// 查询表数据var dataCommand = new SQLiteCommand($"SELECT * FROM {tableName}", connection);using (var dataReader = dataCommand.ExecuteReader()){// 生成 INSERT 语句while (dataReader.Read()){exportSql.Write($"INSERT INTO {tableName} VALUES (");bool firstValue = true;for (int i = 0; i < dataReader.FieldCount; i++){if (!firstValue){exportSql.Write(",");}object value = dataReader.GetValue(i);if (value == null){exportSql.Write("NULL");}else if (value is string){exportSql.Write($"'{value.ToString().Replace("'", "''")}'");}else if (value is DateTime){exportSql.Write($"'{((DateTime)value).ToString("yyyy-MM-dd HH:mm:ss.fff")}'");}else{exportSql.Write(value.ToString());}firstValue = false;}exportSql.Write(");");exportSql.WriteLine();}}exportSql.WriteLine();}// 将导出 SQL 写入到文件File.WriteAllText("export.sql", exportSql.ToString());
}

public void ImportSqlFile(string sqlFilePath, string databaseFilePath)
{// 读取 SQL 文件内容string sql = File.ReadAllText(sqlFilePath);// 创建一个新的 SQLiteConnection 对象using (var connection = new SQLiteConnection($"Data Source={databaseFilePath}")){// 打开数据库连接connection.Open();// 创建一个 SQLiteCommand 对象，并执行 SQL 文件中的 SQL 语句using (var command = new SQLiteCommand(sql, connection)){command.ExecuteNonQuery();}}Console.WriteLine("SQL 文件导入成功！");
}