数据库

SQL SERVER与C#的数据类型对应表

云博小周宇3 Mins Read
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;
  }