Question

我试图从我的数据库中打印一个表，但我想用这个块代码过滤它，我想要做的是在两个小时之间打印数据但我不知道输入小时的格式是正确的，所以这里的代码是：

    string horaI=null;
    string horaF=null;
    string[] hr1 = null;
    string[] hr2 = null;

    on load....
    dateTimePicker1.CustomFormat = "HH:mm tt"; // Only use hours and minutes
    horaI = dateTimePicker1.Value.ToString("HH:mm tt");
    hr1 = horaI.Split();

    string connectionstring = null;
    string sql = null;
    string data = null;

    connectionstring = "server=127.0.0.1; database=gimnasio5; uid=root; pwd=0000000000;";

        sql = "SELECT IdMembresia, Nombre, Apellido, Tipo, Fecha_Inicio,
   Fecha_Vencimiento, Inscripcion, Total,Impreso_Corte FROM membresia where
   Impreso_Corte='No impreso' or (Fecha_Membresia between @d1 and @d2 and
   Hora_Membresia between @d3 and @d4) order by gimnasio5.membresia.IdMembresia;";

        var dtable = new DataTable("membresia");
        var conn = new MySql.Data.MySqlClient.MySqlConnection(connectionstring);
        var cmd = new MySql.Data.MySqlClient.MySqlCommand(sql, conn);
        var dscmd = new MySql.Data.MySqlClient.MySqlDataAdapter(cmd);

        using (conn)
        {

            var param = new MySql.Data.MySqlClient.MySqlParameter("@d1", MySql.Data.MySqlClient.MySqlDbType.Date);
            param.Direction = ParameterDirection.Input;
            param.Value = DateTime.Today;
            cmd.Parameters.Add(param);
            param = new MySql.Data.MySqlClient.MySqlParameter("@d2", MySql.Data.MySqlClient.MySqlDbType.Date);
            param.Direction = ParameterDirection.Input;
            param.Value = DateTime.Today;
            cmd.Parameters.Add(param);

 //The error can be here because when I use it with dates only it works fine
 //but when I add this part of code, fails. 

            param = new MySql.Data.MySqlClient.MySqlParameter("@d3", MySql.Data.MySqlClient.MySqlDbType.Time);
            param.Direction = ParameterDirection.Input;
            param.Value = hr1[0];  //Convert.ToDateTime(hr1[0]).ToString("HH:mm");
            cmd.Parameters.Add(param);
            param = new MySql.Data.MySqlClient.MySqlParameter("@d4", MySql.Data.MySqlClient.MySqlDbType.Time);
            param.Direction = ParameterDirection.Input;
            param.Value = hr2[0];  //Convert.ToDateTime(hr2[0]).ToString("HH:mm");
            cmd.Parameters.Add(param);

            conn.Open();
            dscmd.Fill(dtable);
        }

但是我正在犯错误：类型＆＃39; MySql.Data.MySqlClient.MySqlException＆＃39;发生在MySql.Data.dll中但未在用户代码中处理

其他信息：命令执行期间遇到致命错误。

当我尝试填充MySqlAdapter对象时出现错误：

dscmd.Fill（dtable）;

我认为这是我输入时间的格式，但正如您在代码中看到的那样，我用它来形成它，但两者都不起作用，并返回相同的错误代码。我在MySQL数据库中的列设置为保存时间类型，因此问题不在表中。

数据库中的小时是这样保存的，列是时间类型：

12时03分00秒

21时34分00秒

先谢谢。

表格结构

   CREATE TABLE `membresia` (
   `IdMembresia` int(11) NOT NULL AUTO_INCREMENT,
   `Nombre` varchar(100) NOT NULL,
   `Apellido` varchar(100) NOT NULL,
   `Tipo` varchar(100) NOT NULL,
   `Fecha_Inicio` date NOT NULL,
   `Fecha_Vencimiento` date NOT NULL,
   `Inscripcion` varchar(20) DEFAULT NULL,
   `Estado_membresia` varchar(15) NOT NULL,
   `Fecha_modificacion` date NOT NULL,
   `Total` decimal(10,2) NOT NULL,
   `Nota` varchar(200) DEFAULT NULL,
   `Fecha_Membresia` date NOT NULL,
   `Impreso_Corte` varchar(20) NOT NULL,
   `IdSocio` int(11) DEFAULT NULL,
   `Hora_Membresia` time NOT NULL,
   PRIMARY KEY (`IdMembresia`),
   KEY `L_Id2` (`IdSocio`),
   KEY `F_Nombre` (`Nombre`),
   KEY `F_Apelli` (`Apellido`),
   CONSTRAINT `F_Apelli` FOREIGN KEY (`Apellido`) REFERENCES `socios` (`Apellido`) ON DELETE CASCADE ON UPDATE CASCADE,
   CONSTRAINT `F_Nombre` FOREIGN KEY (`Nombre`) REFERENCES `socios` (`Nombre`) ON DELETE CASCADE ON UPDATE CASCADE,
    CONSTRAINT `L_Id2` FOREIGN KEY (`IdSocio`) REFERENCES `socios` (`IdSocio`) ON DELETE CASCADE ON UPDATE CASCADE)
   ENGINE=InnoDB DEFAULT CHARSET=utf8;

Answer 1

这样的代码：

        SqlConnection conn = new SqlConnection("server=127.0.0.1; database=gimnasio5; uid=root; pwd=0000000000;");

        conn.Open();

        string query = string.Format(@"SELECT IdMembresia, Nombre, Apellido, Tipo, Fecha_Inicio,
                       Fecha_Vencimiento, Inscripcion, Total, Impreso_Corte FROM membresia where
                       Impreso_Corte = 'No impreso' or(Fecha_Membresia between '{0}' and '{1}' and
                       Hora_Membresia between '{2}' and '{3}') order by gimnasio5.membresia.IdMembresia", dateTimePicker1.Value.ToShortDateString(), dateTimePicker2.Value.ToShortDateString(), dateTimePicker3.Value.ToString("hh:mm:ss"), dateTimePicker4.Value.ToString("hh:mm:ss"));

        SqlCommand cmd = new SqlCommand(query, conn);

        DataTable dt = new DataTable();
        dt.Load(cmd.ExecuteReader());
        conn.Close();
        return dt;

C＃从MySQL表

1 个答案: