SQL SERVER与C#的数据类型对应表

Posted 2022-04-02 alex80

序号	类别	SQLServer	C Sharp	备注
1	整数	bit	Boolean	True转换为1False转换为0
2		tinyint	Byte	C Sharp 数据类型都位于System命名空间
3		smallint	Int16
4		int	Int32
5		bigint	Int64
6		smallmoney	Decimal
7		money	Decimal
8		numeric	Decimal
9		decimal	Decimal
10	浮点数	float	Double
11		real	Single
12	日期和时间	smalldatetime	DateTime
13		datetime	DateTime
14		timestamp	DateTime
15	字符串	char	String
16		text	String
17		varchar	String
18		nchar	String
19		ntext	String
20		nvarchar	String
21	二进制数据	binary	Byte[]
22		varbinary	Byte[]
23		image	Byte[]
24	其他	uniqueidentifier	Guid
25		Variant	Object

 

 

SqlDbType => DbType

SqlDbType.BigInt				DbType.Int64
SqlDbType.Binary				DbType.Binary
SqlDbType.Bit					DbType.Boolean
SqlDbType.Char					DbType.AnsiStringFixedLength
SqlDbType.DateTime				DbType.DateTime
SqlDbType.Decimal				DbType.Decimal
SqlDbType.Float					DbType.Double
SqlDbType.Image					DbType.Binary
SqlDbType.Int					DbType.Int32
SqlDbType.Money					DbType.Currency
SqlDbType.NChar					DbType.StringFixedLength
SqlDbType.NText					DbType.String
SqlDbType.NVarChar				DbType.String
SqlDbType.Real					DbType.Single
SqlDbType.UniqueIdentifier		        DbType.Guid
SqlDbType.SmallDateTime			        DbType.DateTime
SqlDbType.SmallInt				DbType.Int16
SqlDbType.SmallMoney			        DbType.Currency
SqlDbType.Text					DbType.AnsiString
SqlDbType.Timestamp				DbType.Binary
SqlDbType.TinyInt				DbType.Byte
SqlDbType.VarBinary				DbType.Binary
SqlDbType.VarChar				DbType.AnsiString
SqlDbType.Variant				DbType.Object
SqlDbType.Xml					DbType.Xml
SqlDbType.Udt					DbType.Object
SqlDbType.Structured			        DbType.Object
SqlDbType.Date					DbType.Date
SqlDbType.Time					DbType.Time
SqlDbType.DateTime2				DbType.DateTime2
SqlDbType.DateTimeOffset		        DbType.DateTimeOffset

 

  /// <summary>
  /// 数据库中与c#中的数据类型对照
  /// </summary>
  /// <param name="type"></param>
  /// <returns></returns>
  private string changetocsharptype(string type)
  
   string reval=string.empty;
   switch(type.tolower())
   
    case "int":
     reval= "int32";
     break;
    case "text":
     reval= "string";
     break;
    case "bigint":
     reval= "int64";
     break;
    case "binary":
     reval= "system.byte[]";
     break;
    case "bit":
     reval= "boolean";
     break;
    case "char":
     reval= "string";
     break;
    case "datetime":
     reval= "system.datetime";
     break;
    case "decimal":
     reval= "system.decimal";
     break;
    case "float":
     reval= "system.double";
     break;
    case "image":
     reval= "system.byte[]";
     break;
    case "money":
     reval= "system.decimal";
     break;
    case "nchar":
     reval= "string";
     break;
    case "ntext":
     reval= "string";
     break;
    case "numeric":
     reval= "system.decimal";
     break;
    case "nvarchar":
     reval= "string";
     break;
    case "real":
     reval= "system.single";
     break;
    case "smalldatetime":
     reval= "system.datetime";
     break;
    case "smallint":
     reval= "int16";
     break;
    case "smallmoney":
     reval= "system.decimal";
     break;
    case "timestamp":
     reval= "system.datetime";
     break;
    case "tinyint":
     reval= "system.byte";
     break;
    case "uniqueidentifier":
     reval= "system.guid";
     break;
    case "varbinary":
     reval= "system.byte[]";
     break;
    case "varchar":
     reval= "string";
     break;
    case "variant":
     reval="object";
     break;
    default:
     reval= "string";
     break;
   
   return reval;