ExecutenonQuery无效

我存储过程如下：

ALTER PROC pr_Update_Users_Nomination ( @UserID AS VARCHAR(100), @Nominated AS BIT ) AS UPDATE User SET isNominated = @Nominated WHERE EMPID = @UserID; 

我想从c＃代码调用这个过程：下面是我正在尝试的代码：

 void OpenConnection() { string Nominated = "False"; //Connection String string sConnString = System.Configuration.ConfigurationManager.ConnectionStrings["ConString1"].ConnectionString; SqlConnection mySqlCon = new SqlConnection(sConnString); SqlCommand mySqlCom = mySqlCon.CreateCommand(); //Call the stored proc and provide in parameters mySqlCom.CommandText = "EXECUTE pr_Update @UserID @Nominated"; mySqlCom.Parameters.Add("@UserID", SqlDbType.VarChar, 20).Value = UserID; mySqlCom.Parameters.Add("@Nominated", SqlDbType.Bit).Value = Nominated; mySqlCon.Open(); mySqlCom.ExecuteNonQuery(); mySqlCon.Close(); } 

我说错了

 Incorrect Syntax near @Nominated 

Answer 1

首先，当使用参数执行过程时，用逗号分隔参数

 EXECUTE pr_Update @UserID, @Nominated 

第二，修改你的代码，

  string sConnString = System.Configuration.ConfigurationManager.ConnectionStrings["ConString1"].ConnectionString; using(SqlConnection mySqlCon = new SqlConnection(sConnString)) { using(SqlCommand mySqlCom = new SqlCommand()) { mySqlCom.Connection = mySqlCon; mySqlCom.CommandText = "pr_Update"; mySqlCom.CommandType = CommandType.StoredProcedure; mySqlCom.Parameters.Add("@UserID", SqlDbType.VarChar, 20).Value = UserID; mySqlCom.Parameters.Add("@Nominated", SqlDbType.Bit).Value = Nominated; try { mySqlCon.Open(); mySqlCom.ExecuteNonQuery(); } catch(SqlException ex) { // do something with the exception // don't hide it } } } 

Answer 2

您缺少参数之间的逗号（，）。

它应该是

 mySqlCom.CommandText = "EXECUTE pr_Update @UserID, @Nominated"; mySqlCom.Parameters.Add("@UserID", SqlDbType.VarChar, 20).Value = UserID; mySqlCom.Parameters.Add("@Nominated", SqlDbType.Bit).Value = Nominated; 

或者，因为你所做的只是调用存储过程，你可以这样做：

 mySqlCom.CommandType = CommandType.StoredProcedure ; mySqlCom.CommandText = "pr_Update"; //no need to specify parameter names mySqlCom.Parameters.Add("@UserID", SqlDbType.VarChar, 20).Value = UserID; mySqlCom.Parameters.Add("@Nominated", SqlDbType.Bit).Value = Nominated; 

Answer 3

仅提供存储过程的名称，因为您在此后的语句中添加参数。 还设置CommandType。

  mySqlCom.CommandText = "pr_Update"; mySqlCom.CommandType = CommandType.StoredProcedure; 

Answer 4

你正在调用错误的SQL。 您应该将命令的命令文本设置为仅pr_Update ：

 mySqlCom.CommandText = "pr_Update"; 

并将类型命令类型设置为存储过程：

 mySqlCom.CommandType = CommandType.StoredProcedure; 

有关更多信息，请参阅MSDN页面