SQL SERVER与C#的数据类型对应表

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

  /// <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;
  }