Question

PROBLEM:

How can I get the certain autonumber id?

ID  DESCRIPTION CLASS 
 1  test1         a 
 2  test2         b
 3  test3         a
 4  test4         a 
 5  test5         b 

id (auto-increment in SQL Server)

Here is the scenario:

I have here 3 columns something like this.

My class is declared using this to get the value of a certain class.

string strclass = string.empty;
strclass = request.querystring["Class"];

How can I get the id of test2?

I would like to use this select statement wherein I will just use the variable.

For example:

string sqltest = "select description from items where class = '" + strID + "' and class = '" strclass "'";

I just really don’t know, how will I get the class id.

Answer 1

Your question really is very confusing. You want the id but your SQL returns the description. Surely your SQL should just be:

string sqltest = "select id from items where description = @description and class = @class";

Do not use string concatenation to generate SQL strings as that opens you up to SQL injection attacks.