a error when use QueryFirstOrDefault ({"[1544b3e3c8004005] execute sql Error"}) ErrorCode -2147467259 int
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Description
I use .net to code，my code likes this : conn.QueryFirstOrDefault (cmd)
I try to use other function that has First , it can not work .
But the function that has single can work .
I look at your code ,the param first or single is used after query from db, they are only a if condition
I can not find the reason
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Research direction
No source files, tests, SQL statement, or complete exception context are identified. Start by reproducing QueryFirstOrDefault(cmd) and the comparable First and Single calls with a complete command and database setup, then determine whether the failure occurs during SQL execution or result selection; done means the cause is isolated and covered by a reproducible test.
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Assessment
- Tech stack
- csharp, sql
- Domain
- database
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 20/100