EF SqlQuery 参数错误

Question

正在使用

string sql = @"
SELECT TOP 50 *
FROM Log 
ORDER BY Date desc";
return context.Database.SqlQuery<Log>(sql).ToList();

有效，但是当我尝试插入

之类的参数时

string sql = @"
SELECT TOP @top *
FROM Log 
ORDER BY @order";

List<object> parameters = new List<object>();
parameters.Add(new SqlParameter("top", top)); //top is int with value 50
parameters.Add(new SqlParameter("order", order)); //order is string with value Date desc

return context.Database.SqlQuery<Log>(sql, parameters.ToArray()).ToList();

我明白了

"Additional information: Incorrect syntax near '@top'.".

我哪里错了？

Answer 1

重新排列您的查询如下

string sql = @"
SELECT TOP (@top) *
FROM Log 
ORDER BY @order";

编辑

string sql = @"
SELECT TOP @top *
FROM Log 
ORDER BY ";

sql += order;

List<object> parameters = new List<object>();
parameters.Add(new SqlParameter("top", top)); //top is int with value 50

return context.Database.SqlQuery<Log>(sql, parameters.ToArray()).ToList();

EF SqlQuery 参数错误

EF SqlQuery Parameter error

c#

sql

parameters