SQL server type corresponds to C # type [go]

Source: Internet
Author: User

SQL type

C # types
Bit bool
tinyint Byte
smallint Short
Int Int
bigint Long
Real Float
Float Double
Money Decimal
Datetime Datetime
Char String
varchar String
NChar String
nvarchar String
Text String
ntext String
Image Byte[]
Binary Byte[]
uniqueidentifier

Guid

//sqldbtype conversion to C # data type
public static Type Sqltype2csharptype (SqlDbType sqltype)
{
Switch (sqltype)
{
Case Sqldbtype.bigint:
Return typeof (Int64);
Case Sqldbtype.binary:
Return typeof (Object);
Case Sqldbtype.bit:
Return typeof (Boolean);
Case SqlDbType.Char:
Return typeof (String);
Case Sqldbtype.datetime:
Return typeof (DateTime);
Case Sqldbtype.decimal:
Return typeof (Decimal);
Case Sqldbtype.float:
Return typeof (Double);
Case Sqldbtype.image:
Return typeof (Object);
Case SqlDbType.Int:
Return typeof (Int32);
Case Sqldbtype.money:
Return typeof (Decimal);
Case SqlDbType.NChar:
Return typeof (String);
Case Sqldbtype.ntext:
Return typeof (String);
Case SqlDbType.NVarChar:
Return typeof (String);
Case Sqldbtype.real:
Return typeof (Single);
Case Sqldbtype.smalldatetime:
Return typeof (DateTime);
Case Sqldbtype.smallint:
Return typeof (Int16);
Case Sqldbtype.smallmoney:
Return typeof (Decimal);
Case Sqldbtype.text:
Return typeof (String);
Case Sqldbtype.timestamp:
Return typeof (Object);
Case Sqldbtype.tinyint:
Return typeof (Byte);
Case sqldbtype.udt://a custom data type
Return typeof (Object);
Case Sqldbtype.uniqueidentifier:
Return typeof (Object);
Case SqlDbType.VarBinary:
Return typeof (Object);
Case SqlDbType.VarChar:
Return typeof (String);
Case Sqldbtype.variant:
Return typeof (Object);
Case Sqldbtype.xml:
Return typeof (Object);
Default
return null;
}
}

Code: SQL Server data type (for example: varchar)
Convert to SqlDbType type
public static SqlDbType Sqltypestring2sqltype (String sqltypestring)
{
SqlDbType DbType = sqldbtype.variant;//Default to Object

Switch (sqltypestring)
{
Case "int":
DbType = SqlDbType.Int;
Break
Case "varchar":
DbType = SqlDbType.VarChar;
Break
Case "bit":
DbType = Sqldbtype.bit;
Break
Case "datetime":
DbType = Sqldbtype.datetime;
Break
Case "decimal":
DbType = Sqldbtype.decimal;
Break
Case "float":
DbType = sqldbtype.float;
Break
Case "image":
DbType = Sqldbtype.image;
Break
Case ' money ':
DbType = Sqldbtype.money;
Break
Case "ntext":
DbType = Sqldbtype.ntext;
Break
case "nvarchar":
DbType = SqlDbType.NVarChar;
Break
Case "smalldatetime":
DbType = Sqldbtype.smalldatetime;
Break
Case "smallint":
DbType = Sqldbtype.smallint;
Break
Case "Text":
DbType = Sqldbtype.text;
Break
Case "bigint":
DbType = Sqldbtype.bigint;
Break
Case "binary":
DbType = sqldbtype.binary;
Break
Case "char":
DbType = SqlDbType.Char;
Break
Case "NCHAR":
DbType = SqlDbType.NChar;
Break
Case "Numeric":
DbType = Sqldbtype.decimal;
Break
Case "real":
DbType = Sqldbtype.real;
Break
Case "SmallMoney":
DbType = Sqldbtype.smallmoney;
Break
Case "sql_variant":
DbType = sqldbtype.variant;
Break
Case "Timestamp":
DbType = Sqldbtype.timestamp;
Break
Case "tinyint":
DbType = Sqldbtype.tinyint;
Break
Case "uniqueidentifier":
DbType = Sqldbtype.uniqueidentifier;
Break
Case "varbinary":
DbType = SqlDbType.VarBinary;
Break
Case "XML":
DbType = Sqldbtype.xml;
Break
}
return dbType;
}
Code:

// sql server中的数据类型,转换为C#中的类型类型
public static Type SqlTypeString2CsharpType(string sqlTypeString)
{
SqlDbType dbTpe = SqlTypeString2SqlType(sqlTypeString);

return SqlType2CsharpType(dbTpe);
}

// 将sql server中的数据类型,转化为C#中的类型的字符串
public static string SqlTypeString2CsharpTypeString(string sqlTypeString)
{
Type type = SqlTypeString2CsharpType(sqlTypeString);

return type.Name;
}

SQL server type corresponds to C # type [go]

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