C# 数据类型映射 (SQLite,MySQL,MSSQL,Oracle)_.NET_编程开发_程序员俱乐部

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C# 数据类型映射 (SQLite,MySQL,MSSQL,Oracle)

 2013/12/6 23:26:14  Ivan.Lee  博客园  我要评论(0)
  • 摘要:一、C#vsSQLite:C#SQLite字段名类型库类型GetFieldType(#)转换备注F_BOOLboolBITNOTNULLBooleanF_BOOL_NULLbool?BITBooleanF_SBYTEsbyteINT8NOTNULLSBytesbyte_F_SBYTE_NULLsbyte?INT8SBytesbyte_F_BYTEbyteUINT8NOTNULLByteF_BYTE_NULLbyte
  • 标签:C# 数据类型 ORA 数据 SQL MySQL Oracle

一、C# vs SQLite:

C# SQLite 字段名 类型 库类型 GetFieldType(#) 转换 备注 F_BOOL bool BIT NOT NULL Boolean     F_BOOL_NULL bool? BIT Boolean     F_SBYTE sbyte INT8 NOT NULL SByte sbyte_   F_SBYTE_NULL sbyte? INT8 SByte sbyte_   F_BYTE byte UINT8 NOT NULL Byte     F_BYTE_NULL byte? UINT8 Byte     F_SHORT short INT16 NOT NULL Int16     F_SHORT_NULL short? INT16 Int16     F_USHORT ushort UINT16 NOT NULL UInt16 ushort_   F_USHORT_NULL ushort? UINT16 UInt16 ushort_   F_INT int INT32 NOT NULL Int32     F_INT_NULL int? INT32 Int32     F_UINT uint UINT32 NOT NULL UInt32 uint_   F_UINT_NULL uint? UINT32 UInt32 uint_   F_LONG long INT64 NOT NULL Int64     F_LONG_NULL long? INT64 Int64     F_ULONG ulong UINT64 NOT NULL UInt64 ulong_   F_ULONG_NULL ulong? UINT64 UInt64 ulong_   F_FLOAT float FLOAT NOT NULL Double   不转兼容 F_FLOAT_NULL float? FLOAT Double   不转兼容 F_DOUBLE double DOUBLE NOT NULL Double     F_DOUBLE_NULL double? DOUBLE Double     F_DECIMAL decimal DECIMAL NOT NULL Decimal   存取不一:<F_DECIMAL>: [-79228162514264300000000000000] != [-79228162514264337593543950335] F_DECIMAL_NULL decimal? DECIMAL Decimal   存取不一:<F_DECIMAL>: [-79228162514264300000000000000] != [-79228162514264337593543950335] F_CHAR char TEXT NOT NULL String     F_CHAR_NULL char? TEXT String     F_STRING string TEXT NOT NULL String     F_STRING_NULL string TEXT String     F_DATETIME DateTime TEXT NOT NULL String     F_DATETIME_NULL DateTime? TEXT String                

二、 C# vs MySQL:

C# MySQL 字段名 类型 库类型 GetFieldType(#) 转换 备注 F_BOOL bool BOOL NOT NULL Boolean     F_BOOL_NULL bool? BOOL NULL Boolean     F_SBYTE sbyte TINYINT NOT NULL SByte sbyte_   F_SBYTE_NULL sbyte? TINYINT NULL SByte sbyte_   F_BYTE byte TINYINT UNSIGNED NOT NULL Byte     F_BYTE_NULL byte? TINYINT UNSIGNED NULL Byte     F_SHORT short SMALLINT NOT NULL Int16     F_SHORT_NULL short? SMALLINT NULL Int16     F_USHORT ushort SMALLINT UNSIGNED NOT NULL UInt16 ushort_   F_USHORT_NULL ushort? SMALLINT UNSIGNED NULL UInt16 ushort_   F_INT int INT NOT NULL Int32     F_INT_NULL int? INT NULL Int32     F_UINT uint INT UNSIGNED NOT NULL UInt32 uint_   F_UINT_NULL uint? INT UNSIGNED NULL UInt32 uint_   F_LONG long BIGINT NOT NULL Int64     F_LONG_NULL long? BIGINT NULL Int64     F_ULONG ulong BIGINT UNSIGNED NOT NULL UInt64 ulong_   F_ULONG_NULL ulong? BIGINT UNSIGNED NULL UInt64 ulong_   F_FLOAT float FLOAT NOT NULL Single   极值溢出 F_FLOAT_NULL float? FLOAT NULL Single   极值溢出 F_DOUBLE double DOUBLE NOT NULL Double     F_DOUBLE_NULL double? DOUBLE NULL Double     F_DECIMAL decimal DECIMAL NOT NULL Decimal   极值溢出 F_DECIMAL_NULL decimal? DECIMAL NULL Decimal   极值溢出 F_CHAR char CHARACTER NOT NULL String   中文报错 F_CHAR_NULL char? CHARACTER NULL String   中文报错 F_STRING string VARCHAR(50) NOT NULL String     F_STRING_NULL string VARCHAR(50) NULL String     F_DATETIME DateTime DATETIME NOT NULL DateTime     F_DATETIME_NULL DateTime? DATETIME NULL DateTime                

三、 C# vs MSSQL:

C# MSSQL 字段名 类型 库类型 GetFieldType(#) 转换 备注 F_BOOL bool bit NOT NULL Boolean     F_BOOL_NULL bool? bit NULL Boolean     F_SBYTE sbyte smallint NOT NULL Int16 sbyte_short   F_SBYTE_NULL sbyte? smallint NULL Int16 sbyte_short   F_BYTE byte tinyint NOT NUL; Byte     F_BYTE_NULL byte? tinyint NULL Byte     F_SHORT short smallint NOT NULL Int16     F_SHORT_NULL short? smallint NULL Int16     F_USHORT ushort int NOT NULL Int32 ushort_int   F_USHORT_NULL ushort? int NULL Int32 ushort_int   F_INT int int NOT NULL Int32     F_INT_NULL int? int NULL Int32     F_UINT uint bigint NOT NULL Int64 uint_long   F_UINT_NULL uint? bigint NULL Int64 uint_long   F_LONG long bigint NOT NULL Int64     F_LONG_NULL long? bigint NULL Int64     F_ULONG ulong real NOT NULL Single ulong_float   F_ULONG_NULL ulong? real NULL Single ulong_float   F_FLOAT float real NOT NULL Single     F_FLOAT_NULL float? real NULL Single     F_DOUBLE double float NOT NULL Double     F_DOUBLE_NULL double? float NULL Double     F_DECIMAL decimal decimal NOT NULL Decimal   极值溢出 F_DECIMAL_NULL decimal? decimal NULL Decimal   极值溢出 F_CHAR char char(1) NOT NULL String     F_CHAR_NULL char? char(1) NULL String     F_STRING string varchar(50) NOT NULL F_STRING:     F_STRING_NULL string varchar(50) NULL String     F_DATETIME DateTime datetime NOT NULL DateTime   class="font7">必须介于 1/1/1753 12:00:00 AM 12/31/9999 11:59:59 PM 之间。 F_DATETIME_NULL DateTime? datetime NULL DateTime                

四、C# vs Oracle:

C# Oracle 字段名 类型 库类型 GetFieldType(#) 转换 备注 F_BOOL bool CHAR(1) NOT NULL String bool_string   F_BOOL_NULL bool? CHAR(1) String bool_string   F_SBYTE sbyte NUMBER(3) NOT NULL Int16 sbyte_short   F_SBYTE_NULL sbyte? NUMBER(3) Int16 sbyte_short   F_BYTE byte NUMBER(3) NOT NULL Int16 byte_short   F_BYTE_NULL byte? NUMBER(3) Int16 byte_short   F_SHORT short NUMBER(5) NOT NULL Int32 short_int   F_SHORT_NULL short? NUMBER(5) Int32 short_int   F_USHORT ushort NUMBER(5) NOT NULL Int32 ushort_int   F_USHORT_NULL ushort? NUMBER(5) Int32 ushort_int   F_INT int NUMBER(10) NOT NULL Int64 int_long   F_INT_NULL int? NUMBER(10) Int64 int_long   F_UINT uint NUMBER(10) NOT NULL Int64 uint_long   F_UINT_NULL uint? NUMBER(10) Int64 uint_long   F_LONG long NUMBER(19) NOT NULL Decimal long_decimal   F_LONG_NULL long? NUMBER(19) Decimal long_decimal   F_ULONG ulong NUMBER(19) NOT NULL Decimal ulong_decimal   F_ULONG_NULL ulong? NUMBER(19) Decimal ulong_decimal   F_FLOAT float BINARY_FLOAT NOT NULL Single     F_FLOAT_NULL float? BINARY_FLOAT Single     F_DOUBLE double BINARY_DOUBLE NOT NULL Double   极值溢出 F_DOUBLE_NULL double? BINARY_DOUBLE Double   极值溢出 F_DECIMAL decimal DECIMAL(33,3) NOT NULL Decimal     F_DECIMAL_NULL decimal? DECIMAL(33,3) Decimal     F_CHAR char CHAR(1) NOT NULL String     F_CHAR_NULL char? CHAR(1) String     F_STRING string VARCHAR(50) NOT NULL String   不允许空字符 F_STRING_NULL string VARCHAR(50) String   不允许空字符 F_DATETIME DateTime TIMESTAMP NOT NULL DateTime   大值读取报错 F_DATETIME_NULL DateTime? TIMESTAMP DateTime   大值读取报错            

附、类型转换

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using System;
using System.Collections.Generic;
using System.Text;

namespace vJine.Core.ORM {
    public class TypeConverter {

        public class sbyte_ /*: IConverter<sbyte>*/ {
            public static sbyte CONV_Q(object V) {
                return (sbyte)V;
            }
        }

        public class ushort_ /*: IConverter<ushort>*/ {
            public static ushort CONV_Q(object V) {
                return (ushort)V;
            }
        }

        public class uint_ /*: IConverter<uint>*/ {
            public static uint CONV_Q(object V) {
                return (uint)V;
            }
        }

        public class ulong_ /*: IConverter<ulong>*/ {
            public static ulong CONV_Q(object V) {
                return (ulong)V;
            }
        }

        public class bool_string /*: IConverter<bool>*/ {
            public static object CONV_I(object V) {
                if ((bool)V == true) {
                    return "1";
                } else {
                    return "0";
                }
            }

            public static bool CONV_Q(object V) {
                if ((string)V == "1") {
                    return true;
                } else {
                    return false;
                }
            }
        }

        public class sbyte_short /*: IConverter<sbyte>*/ {

            public static object CONV_I(object V) {
                return Convert.ToInt16(V);
            }

            public static sbyte CONV_Q(object V) {
                return Convert.ToSByte(V);
            }
        }

        public class byte_short /*: IConverter<byte>*/ {
            public static object CONV_I(object V) {
                return Convert.ToInt16(V);
            }

            public static byte CONV_Q(object V) {
                return Convert.ToByte(V);
            }
        }

        public class short_int /*: IConverter<short>*/ {
            public static object CONV_I(object V) {
                return Convert.ToInt32(V);
            }

            public static short CONV_Q(object V) {
                return Convert.ToInt16(V);
            }
        }

        public class ushort_int /*: IConverter<ushort>*/ {
            public static object CONV_I(object V, string Name) {
                return Convert.ToInt32(V);
            }

            public static ushort CONV_Q(object V, string Name) {
                return Convert.ToUInt16(V);
            }
        }

        public class int_long /*: IConverter<int>*/ {
            public static object CONV_I(object V) {
                return Convert.ToInt64(V);
            }

            public static int CONV_Q(object V) {
                return Convert.ToInt32(V);
            }
        }

        public class uint_long /*: IConverter<uint>*/ {
            public static object CONV_I(object V) {
                return Convert.ToInt64(V);
            }

            public static uint CONV_Q(object V) {
                return Convert.ToUInt32(V);
            }
        }

        public class long_decimal /*: IConverter<long>*/ {
            public static object CONV_I(object V) {
                return decimal.Parse(V.ToString());
            }

            public static long CONV_Q(object V) {
                return long.Parse(V.ToString());
            }
        }

        public class ulong_float /*: IConverter<ulong>*/ {
            public static object CONV_I(object V) {
                return Convert.ToSingle(V);
            }

            public static ulong CONV_Q(object V) {
                return Convert.ToUInt64(V);
            }
        }

        public class ulong_decimal /*: IConverter<ulong>*/ {
            public static object CONV_I(object V) {
                return decimal.Parse(V.ToString());
            }

            public static ulong CONV_Q(object V) {
                return ulong.Parse(V.ToString());
            }
        }

        public class float_double /*: IConverter<float>*/ {
            public static object CONV_I(object V) {
                return Convert.ToDouble(V);
            }

            public static float CONV_Q(object V) {
                return Convert.ToSingle(V);
            }
        }

        public class char_string /*: IConverter<char>*/ {
            public static object CONV_I(object V) {
                if (V is Char) {
                    return V;
                } else if (V is string) {
                    string chars = (string)V;
                    if (chars == "") {
                        return '\0';
                    } else {
                        return chars[0];
                    }
                } else {
                    throw new OrmException("Fail To Convert String[{0}] To Char", V);
                }
            }

            public static char CONV_Q(object V) {
                return ((string)V)[0];
            }
        }

        public class DateTime_ /*: IConverter<DateTime>*/ {
            public static object CONV_I(object V) {
                return V;
            }

            public static DateTime CONV_Q(object V) {
                return (DateTime)V;
            }
        }
    }
}
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