intresult = dataContext.ExecuteCommand(strSql); Console.WriteLine(); Console.WriteLine("affect num:{0}", result); returnresult; } 调试过程中,通过IntelliTrace可以很清楚地捕获: “ADO.NET:执行NonQuery…”基本可以断言我们的设想是正确的。 3、防止sql注入 1和2中,执行sql语句的两个方法都有一个params...
//1.创建compiled query NorthwindDataContext db = new NorthwindDataContext(); var fn = CompiledQuery.Compile( (NorthwindDataContext db2, string city) => from c in db2.Customers where c.City == city select c); //2.查询城市为London的消费者,用LonCusts集合表示,这时可以用数据控件绑定 var LonCu...
找到 INCREASE_SALARY_BY_10 和UPDATE_AND_RETURN_SALARY 存储过程。将 INCREASE_SALARY_BY_10 和UPDATE_AND_RETURN_SALARY 的代码复制到 SQL Query Window 中,然后针对每个存储过程单击 Execute Query ()。 8 . 确保新添加的存储过程显示在 HR.ORCL > Procedures 节点下。
Dim londonCustomers = From cust In db.Customers _ where cust.City = "London" ' Execute once using ToList() or ToArray() Dim londonCustList = londonCustomers.ToList() ' Neither of these iterations re-executes the query For Each cust In londonCustList Console.WriteLine(cust.CompanyName) Ne...
Of course, application writers often need to be very explicit about where and when a query is executed. It would be unexpected if an application were to execute a query multiple times simply because it needed to examine the results more than once. For example, you may want to bind the res...
直接在資料庫上執行 SQL 查詢,並傳回物件。 ExecuteQuery(Type, String, Object[]) 直接在資料庫上執行 SQL 查詢。 C# 複製 public System.Collections.IEnumerable ExecuteQuery(Type elementType, string query, params object[] parameters); 參數 elementType Type 要傳回的 IEnumerable<T> 型別。 查詢結果中...
直接在資料庫上執行 SQL 查詢。 ExecuteQuery<TResult>(String, Object[]) 直接在資料庫上執行 SQL 查詢,並傳回物件。 ExecuteQuery(Type, String, Object[]) 直接在資料庫上執行 SQL 查詢。 C# publicSystem.Collections.IEnumerableExecuteQuery(Type elementType,stringquery,paramsobject[] parameters); ...
query String The SQL query to be executed. parameters Object[] The array of parameters to be passed to the command. Note the following behavior: If the number of objects in the array is less than the highest number identified in the command string, an exception is thrown. ...
inqueryMajorCities) { Console.WriteLine(city); }// Output:// City { Name = Tokyo, Population = 37833000 }// City { Name = Delhi, Population = 30290000 }// Method-based syntaxIEnumerable<City> queryMajorCities2 = cities.Where(c => c.Population >30_000_000);// Execute the query to...
// Specify the data source.int[] scores = {97,92,81,60};// Define the query expression.IEnumerable<int> scoreQuery =fromscoreinscoreswherescore >80selectscore;// Execute the query.foreach(intiinscoreQuery) { Console.Write(i +" "); }// Output: 97 92 81 ...