MySql 参数赋值bug (MySql.Data, Version=6.9.6.0 沙雕玩意)

直接将参数赋值为常量0则参数值为null，出现异常：MySql.Data.MySqlClient.MySqlException (0x80004005): Column ‘PayType‘ cannot be null

public static long CreateIntegralPay(long memId, decimal payAmount, decimal buyIntegral)
{
    var id = BitConverter.ToInt64(Guid.NewGuid().ToByteArray(), 0);
    var sqlBuffer = new StringBuilder();
    sqlBuffer.AppendLine("insert into `memberintegralrecordpay` (`Id`,`MemberId`,`PayType`,`PayAmount`,`BuyIntegral`,`PayStatus`,`RecordTime`,`Remark`)");
    sqlBuffer.AppendLine("values(@Id, @MemberId, @PayType, @PayAmount, @BuyIntegral, @PayStatus, @RecordTime, @Remark);");
    //sqlBuffer.AppendLine("select @@identity; ");
    const int val= 0;
    var sqlParameters = new MySql.Data.MySqlClient.MySqlParameter[]
    {
            new MySql.Data.MySqlClient.MySqlParameter("@Id",id),
            new MySql.Data.MySqlClient.MySqlParameter("@MemberId",memId),
            new MySql.Data.MySqlClient.MySqlParameter("@PayType", 0),
            new MySql.Data.MySqlClient.MySqlParameter("@PayAmount", payAmount),
            new MySql.Data.MySqlClient.MySqlParameter("@BuyIntegral",buyIntegral),
            new MySql.Data.MySqlClient.MySqlParameter("@PayStatus",val),
            new MySql.Data.MySqlClient.MySqlParameter("@RecordTime",DateTime.Now),
            new MySql.Data.MySqlClient.MySqlParameter("@Remark",string.Empty)
    };
    if (DbHelper.ExecuteSql(sqlBuffer.ToString(), sqlParameters) > 0)
    {
        return id;
    }
    return 0;
}

将0用变量代替后没有问题

public static long CreateIntegralPay(long memId, decimal payAmount, decimal buyIntegral)
{
    var id = BitConverter.ToInt64(Guid.NewGuid().ToByteArray(), 0);
    var sqlBuffer = new StringBuilder();
    sqlBuffer.AppendLine("insert into `memberintegralrecordpay` (`Id`,`MemberId`,`PayType`,`PayAmount`,`BuyIntegral`,`PayStatus`,`RecordTime`,`Remark`)");
    sqlBuffer.AppendLine("values(@Id, @MemberId, @PayType, @PayAmount, @BuyIntegral, @PayStatus, @RecordTime, @Remark);");
    //sqlBuffer.AppendLine("select @@identity; ");
    int val = 0;
    var sqlParameters = new MySql.Data.MySqlClient.MySqlParameter[]
    {
            new MySql.Data.MySqlClient.MySqlParameter("@Id",id),
            new MySql.Data.MySqlClient.MySqlParameter("@MemberId",memId),
            new MySql.Data.MySqlClient.MySqlParameter("@PayType", val),
            new MySql.Data.MySqlClient.MySqlParameter("@PayAmount", payAmount),
            new MySql.Data.MySqlClient.MySqlParameter("@BuyIntegral",buyIntegral),
            new MySql.Data.MySqlClient.MySqlParameter("@PayStatus",val),
            new MySql.Data.MySqlClient.MySqlParameter("@RecordTime",DateTime.Now),
            new MySql.Data.MySqlClient.MySqlParameter("@Remark",string.Empty)
    };
    if (DbHelper.ExecuteSql(sqlBuffer.ToString(), sqlParameters) > 0)
    {
        return id;
    }
    return 0;
}

原文地址：https://www.cnblogs.com/dreamman/p/11367970.html