关于.net：C＃等效的SQL Server数据类型

C# Equivalent of SQL Server DataTypes

for the following SQL Server数据类型的数据类型的对应，是会在C #茶好吗？P＞＜／

精确数值解P＞＜／

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bigint
numeric
bit
smallint
decimal
smallmoney
int
tinyint
money

数值近似P＞＜／

1 2	float real

日期和时间P＞＜／

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date
datetimeoffset
datetime2
smalldatetime
datetime
time

character stringsP＞＜／

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char
varchar
text

Unicode character stringsP＞＜／

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nchar
nvarchar
ntext

二进制字符串P＞＜／

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binary
varbinary
image

其他数据类型P＞＜／

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cursor
timestamp
hierarchyid
uniqueidentifier
sql_variant
xml
table

(来源：的MSDN)P＞＜／

相关讨论

这是针对SQL Server 2005的。表的更新版本包括SQL Server 2008、SQL Server 2008 R2、SQL Server 2012和SQL Server 2014。

SQL Server数据类型及其.NET框架等效项

下表列出了Microsoft SQL Server数据类型、System.Data.SqlTypes命名空间中SQL Server的公共语言运行时(CLR)中的等效数据类型以及Microsoft.NET框架中的本机CLR等效数据类型。

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SQL Server data type CLR data type (SQL Server) CLR data type (.NET Framework)
varbinary SqlBytes, SqlBinary Byte[]
binary SqlBytes, SqlBinary Byte[]
varbinary(1), binary(1) SqlBytes, SqlBinary byte, Byte[]
image None None

varchar None None
char None None
nvarchar(1), nchar(1) SqlChars, SqlString Char, String, Char[]
nvarchar SqlChars, SqlString String, Char[]
nchar SqlChars, SqlString String, Char[]
text None None
ntext None None

uniqueidentifier SqlGuid Guid
rowversion None Byte[]
bit SqlBoolean Boolean
tinyint SqlByte Byte
smallint SqlInt16 Int16
int SqlInt32 Int32
bigint SqlInt64 Int64

smallmoney SqlMoney Decimal
money SqlMoney Decimal
numeric SqlDecimal Decimal
decimal SqlDecimal Decimal
real SqlSingle Single
float SqlDouble Double

smalldatetime SqlDateTime DateTime
datetime SqlDateTime DateTime

sql_variant None Object
User-defined type(UDT) None user-defined type
table None None
cursor None None
timestamp None None
xml SqlXml None

相关讨论

SQL Server和.NET数据类型映射

SQL Server and .Net Data Type mapping

如果有人在寻找从/到C和SQL Server格式的转换方法，下面是一个简单的实现：

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private readonly string[] SqlServerTypes = {"bigint","binary","bit", "char","date", "datetime","datetime2","datetimeoffset","decimal","filestream","float", "geography", "geometry", "hierarchyid", "image", "int","money", "nchar", "ntext", "numeric","nvarchar","real", "rowversion","smalldatetime","smallint","smallmoney","sql_variant","text", "time", "timestamp","tinyint","uniqueidentifier","varbinary","varchar","xml" };
private readonly string[] CSharpTypes = {"long", "byte[]","bool","char","DateTime","DateTime","DateTime", "DateTimeOffset","decimal","byte[]", "double","Microsoft.SqlServer.Types.SqlGeography","Microsoft.SqlServer.Types.SqlGeometry","Microsoft.SqlServer.Types.SqlHierarchyId","byte[]","int","decimal","string","string","decimal","string", "Single","byte[]", "DateTime", "short", "decimal", "object", "string","TimeSpan","byte[]", "byte", "Guid", "bite[]", "string", "string" };

public string ConvertSqlServerFormatToCSharp(string typeName)
{
var index = Array.IndexOf(SqlServerTypes, typeName);

return index > -1
? CSharpTypes[index]
:"object";
}

public string ConvertCSharpFormatToSqlServer(string typeName)
{
var index = Array.IndexOf(CSharpTypes, typeName);

return index > -1
? SqlServerTypes[index]
: null;
}