C# equivalent SQL Server data types
Use the correct data type in C# that corresponds to the data stored in the SQL Server database Very important. The following table provides various SQL Server data types and their corresponding C# Equivalents:
Exact number
SQL Server 数据类型 | C# 数据类型(SQL Server) | C# 数据类型(.NET Framework) |
---|---|---|
bigint | SqlInt64 | Int64 |
numeric | SqlDecimal | Decimal |
bit | SqlBoolean | Boolean |
smallint | SqlInt16 | Int16 |
decimal | SqlDecimal | Decimal |
smallmoney | SqlMoney | Decimal |
int | SqlInt32 | Int32 |
tinyint | SqlByte | Byte |
money | SqlMoney | Decimal |
Approximate number
SQL Server 数据类型 | C# 数据类型(SQL Server) | C# 数据类型(.NET Framework) |
---|---|---|
float | SqlDouble | Double |
real | SqlSingle | Single |
Date and Time
SQL Server 数据类型 | C# 数据类型(SQL Server) | C# 数据类型(.NET Framework) |
---|---|---|
date | N/A | N/A |
datetimeoffset | N/A | N/A |
datetime2 | N/A | N/A |
smalldatetime | SqlDateTime | DateTime |
datetime | SqlDateTime | DateTime |
time | N/A | N/A |
Character String
SQL Server 数据类型 | C# 数据类型(SQL Server) | C# 数据类型(.NET Framework) |
---|---|---|
char | N/A | N/A |
varchar | N/A | N/A |
text | N/A | N/A |
Unicode String
SQL Server 数据类型 | C# 数据类型(SQL Server) | C# 数据类型(.NET Framework) |
---|---|---|
nchar | N/A | N/A |
nvarchar | N/A | N/A |
ntext | N/A | N/A |
Binary string
SQL Server 数据类型 | C# 数据类型(SQL Server) | C# 数据类型(.NET Framework) |
---|---|---|
binary | SqlBinary | Byte[] |
varbinary | SqlBinary | Byte[] |
image | N/A | N/A |
Other data types
SQL Server 数据类型 | C# 数据类型(SQL Server) | C# 数据类型(.NET Framework) |
---|---|---|
cursor | N/A | N/A |
timestamp | N/A | N/A |
hierarchyid | N/A | N/A |
uniqueidentifier | SqlGuid | Guid |
sql_variant | N/A | Object |
xml | SqlXml | N/A |
table | N/A | N/A |
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