这两天为了一个问题折腾了好久,记载一下。
sqlite语句一定要严格按例子来写,例如:
"CREATE TABLE PunchData (Id Text primary key,Height Float,Angle Float,Radius Float,Strength Float)";
"INSERT INTO PunchData(Id,Height,Angle,Radius,Strength) VALUES('{0}',{1},{2},{3},{4})";
创建的时候Id是Text类型,插入的时候,{0}要加单引号。。 否则,Id为0123是,通过数据库操作 读取出来后变为123了。
最下面是执行sqlite语句的时候,若出错,出错对应的ErrorCode和Message。
try
{
using (DbCommand cmd = cnn.CreateCommand())
{
cmd.CommandText = string.Format(punchInsertStr,punchData.id,punchData.height.ToString(),
punchData.angle.ToString(),punchData.radius.ToString(),
punchData.strength.ToString());
count = cmd.ExecuteNonQuery();
}
}
catch (sqliteException ex)
{
int errorCode = (int)ex.ErrorCode;
}
public readonly Dictionary<int,string> errorMessage = new Dictionary<int,string> {
{ 1,"sql错误或丢失数据库" },{ 2,"sqlite 内部逻辑错误" },{ 3,"拒绝访问" },
{ 4,"回调函数请求取消操作" },{ 5,"数据库文件被锁定" },{ 19,"由于约束违例,例如编号唯一" }
};
string ErrorMassage = errorMessage[errorCode]
附:
#define sqlITE_OK 0 /* 成功 | Successful result *//* 错误码开始 */
#define sqlITE_ERROR 1 /* sql错误 或 丢失数据库 | sql error or missing database */
#define sqlITE_INTERNAL 2 /* sqlite 内部逻辑错误 | Internal logic error in sqlite */
#define sqlITE_PERM 3 /* 拒绝访问 | Access permission denied */
#define sqlITE_ABORT 4 /* 回调函数请求取消操作 | Callback routine requested an abort */
#define sqlITE_BUSY 5 /* 数据库文件被锁定 | The database file is locked */
#define sqlITE_LOCKED 6 /* 数据库中的一个表被锁定 | A table in the database is locked */
#define sqlITE_NOMEM 7 /* 某次 malloc() 函数调用失败 | A malloc() Failed */
#define sqlITE_READONLY 8 /* 尝试写入一个只读数据库 | Attempt to write a readonly database */
#define sqlITE_INTERRUPT 9 /* 操作被 sqlite3_interupt() 函数中断 | Operation terminated by sqlite3_interrupt() */
#define sqlITE_IOERR 10 /* 发生某些磁盘 I/O 错误 | Some kind of disk I/O error occurred */
#define sqlITE_CORRUPT 11 /* 数据库磁盘映像不正确 | The database disk image is malformed */
#define sqlITE_NOTFOUND 12 /* sqlite3_file_control() 中出现未知操作数 | Unknown opcode in sqlite3_file_control() */
#define sqlITE_FULL 13 /* 因为数据库满导致插入失败 | Insertion Failed because database is full */
#define sqlITE_CANTOPEN 14 /* 无法打开数据库文件 | Unable to open the database file */
#define sqlITE_PROTOCOL 15 /* 数据库锁定协议错误 | Database lock protocol error */
#define sqlITE_EMPTY 16 /* 数据库为空 | Database is empty */
#define sqlITE_SCHEMA 17 /* 数据结构发生改变 | The database schema changed */
#define sqlITE_TOOBIG 18 /* 字符串或二进制数据超过大小限制 | String or BLOB exceeds size limit */
#define sqlITE_CONSTRAINT 19 /* 由于约束违例而取消 | Abort due to constraint violation */ (例如:主键约束) #define sqlITE_MISMATCH 20 /* 数据类型不匹配 | Data type mismatch */ #define sqlITE_MISUSE 21 /* 不正确的库使用 | Library used incorrectly */ #define sqlITE_NOLFS 22 /* 使用了操作系统不支持的功能 | Uses OS features not supported on host */ #define sqlITE_AUTH 23 /* 授权失败 | Authorization denied */ #define sqlITE_FORMAT 24 /* 附加数据库格式错误 | Auxiliary database format error */ #define sqlITE_RANGE 25 /* 传递给sqlite3_bind()的第二个参数超出范围 | 2nd parameter to sqlite3_bind out of range */ #define sqlITE_NOTADB 26 /* 被打开的文件不是一个数据库文件 | File opened that is not a database file */ #define sqlITE_ROW 100 /* sqlite3_step() 已经产生一个行结果 | sqlite3_step() has another row ready */ #define sqlITE_DONE 101 /* sqlite3_step() 完成执行操作 | sqlite3_step() has finished executing */ /* 错误码结束 */