SQL SERVER與C#的數據類型對應表

 

序號	類別	SQLServer	C Sharp	備注
1	整數	bit	Boolean	True轉換為1False轉換為0
2		tinyint	Byte	C Sharp 數據類型都位於System命名空間
3		smallint	Int16
4		int	Int32
5		bigint	Int64
6		smallmoney	Decimal
7		money	Decimal
8		numeric	Decimal
9		decimal	Decimal
10	浮點數	float	Double
11		real	Single
12	日期和時間	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	二進制數據	binary	Byte[]
22		varbinary	Byte[]
23		image	Byte[]
24	其他	uniqueidentifier	Guid
25		Variant	Object

 

 

  /// <summary>
  /// 數據庫中與c#中的數據類型對照
  /// </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;
  }