Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
825 views
in Technique[技术] by (71.8m points)

sql server - How can you convert "tinyint" of t-sql to integer in c#?

I have a tinyint column in the database and I wish to convert it to Int32 for an SqlDataReader.

How do i go about it?

Edit #1

I recently had to do this.

int a = dataReader.GetByte(dr.GetOrdinal("ColumnName"));

#In Addition to Answer

SQL Server Data Type Mappings

bigint           - GetInt64  
binary           - GetBytes  
int              - GetInt32  
money            - GetDecimal  
rowversion       - GetBytes  
smallint         - GetInt16  
tinyint          - GetByte  
uniqueidentifier - GetGuid   
...

For more info visit - SQL Server Data Type Mappings

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

What does it normally come back as - byte? If so, just do an unbox and then a convert:

(int)(byte) reader["column"];

or just let the conversion happen naturally:

int x = (byte) reader["column"];

or do the same with the strongly typed methods:

int x = reader.GetByte(column);

Adjust this to sbyte or short or whatever if I'm wrong about it mapping to byte. You could do the conversion at the SQL Server side, but I'd personally do it at the client side instead, and keep the SQL simpler.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...