如果 DbParameter.DbType 是 Binary，那么 DbParameter.Size 的值是多少？

Question

I am working with Visual Studio 2010, .Net Framework 4 and SQL Server 2008 R2.

I have a table and one of its column's data type is timestamp . I am trying to setup a DbParameter for this column. Looking at https://docs.microsoft.com/en-us/dotnet/framework/data/adonet/sql-server-data-type-mappings I can see that the DbParameter.DbType for this column should be Binary . But what should be the value of DbParameter.Size for this column?

Thanks

Answer 1

Sorry to read you got stuck in the past. I'll send Doc Brown to get you back to 2019. I mean, seriously, Don't you think it's high time to upgrade your VS and SQL Server?

To answer your question, In SQL Server, Timestamp is a synonym to RowVersion .
From documentation:

[rowversion] Is a data type that exposes automatically generated, unique binary numbers within a database. rowversion is generally used as a mechanism for version-stamping table rows. The storage size is 8 bytes. The rowversion data type is just an incrementing number and does not preserve a date or a time.

(emphasis mine)

Also, from the same documentation page:

Note

The timestamp syntax is deprecated. This feature is in maintenance mode and may be removed in a future version of Microsoft SQL Server. Avoid using this feature in new development work, and plan to modify applications that currently use this feature.

BTW, RowVersion is automatically generated - so unless your parameter is an out parameter, I see no reason to use it in a parameter.