问从sqlite检索字符串形式的数字并转换为intEN版权声明：本文内容由互联网用户自发贡献，该文观点仅代表...
};objectobj=SQLite.ExecuteScalar(sql, parameters);inti =Convert.ToInt32(obj);if(i >0) {this.label4.Text ="登录成功!";this.label4.Show(); }else{this.label4.Text ="登录失败!";this.label4.Show(); } } (6)【注册】的逻辑 privatevoidbutton1_Click(objectsender, EventArgs e){;stringna...
//////SQL语句///参数内容,比如一个字段是格式复杂的文章,有特殊符号,可以通过这个方式添加///<returns>影响的记录数</returns>publicstaticintExecuteSql(stringSQLString,stringcontent) {using(SQLiteConnection connection =newSQLiteConnection(connectionString)) { SQLiteCommand cmd=newSQLiteCommand(SQLString, con...
new SQLiteParameter("@companyname",System.Data.DbType.String), new SQLiteParameter("@addtime",System.Data.DbType.DateTime) }; paras[0].Value = TextBox1.Text; paras[1].Value = TextBox2.Text; //返回插入的主键ID //使用select last_insert_rowid()返回自增字段的值 int addid = Convert.ToI...
string timeSpan = Convert.ToInt64(ts.TotalSeconds).ToString(); return timeSpan; } 1. 2. 3. 4. 5. 请注意:这里获取的单位是秒。 2、时间戳转换 从数据库中读取存储的时间戳字符串 long timestamp = long.Parse(reader.GetString(reader.GetOrdinal("timestamp"))); ...
(QString dirPath);//设置数据库存放路径 bool creatDbFile(QString dbName);//生成一个db文件 bool reOpenSql(QString dbName);//打开连接 bool closeSql();//关闭连接 bool queryExec(QString dbName,QString sqlStr);//执行sql语句,不获取结果 bool queryExec(QString dbName,QString sqlStr,QList<Q...
如果使用上面的做法,只需要指定连接字符串ConnectionString即可,一般可以这样指定其数据库连接字符串。 connectionString = string.Format(@"Data Source={0}\OrderWater.db;Version=3;", Application.StartupPath); 如果是使用微软的企业库EnterpriseLibary来进行数据库访问的话,那么需要在配置文件中配置数据库访问,如下...
Dateproperties can be mapped to either the 'TEXT' or to the 'INTEGER' storage class (defaults to 'INTEGER') and their values will be stored as UTC. Using 'INTEGER' converts to Unix-Time, so fractions of seconds are lost. This can be changed by using the field option 'dateInMilliSecond...
try{stringsql ="insert into"+ textBox2.Text +"(name, score) values ('"+ textBox3.Text +"',"+ Convert.ToInt32(textBox4.Text) +")"; SQLiteCommand command=newSQLiteCommand(sql, Conn); command.ExecuteNonQuery(); }catch(Exception ex) ...
1date(timestring, modifier, modifier, ...)以 YYYY-MM-DD 格式返回日期。例如：date('2023-11-22...