存储过程中的SQL Server和使用存储过程

Question

试图创建一个asp.net c＃表格用于学习目的在家里，我绝对努力连接到我的storedprocedure。

我肯定是在正确的数据库中，因为当我通过cmdprompt启动数据库并通过数据源连接到它时，它在视觉设计中连接并查找存储过程。所以一定有我做错的事情？我一直在Google上搜索大约30-40分钟，我尝试过的所有内容都没有解决我的问题。有什么建议吗？

const string constring = @"Data Source=(localdb)\ProjectsV12;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=False"; 

    public static int InsertEnquiry(string Name, string Subject, string Email, string Message, string Phone) { 

     //default ticketid of 0 which will be changed to -1 if an error or greater than 0 if successful 
     int TicketID = 0; 

     if (String.IsNullOrEmpty(Phone)) Phone = "0"; 

     using (var conn = new SqlConnection(constring)) { 
      //create command 
      SqlCommand command = new SqlCommand(); 

      //tell the command which connection its using 
      command.Connection = conn; 

      //inform command that it is a stored procedure and the name of stored procedure 
      command.CommandText = "InsertEnquiry"; 
      command.CommandType = CommandType.StoredProcedure; 

      //add the parameters to the sqlcommand 
      command.Parameters.Add(new SqlParameter("@Name", SqlDbType.NVarChar)).Value = Name; 
      command.Parameters.Add(new SqlParameter("@Subject", SqlDbType.NVarChar)).Value = Subject; 
      command.Parameters.Add(new SqlParameter("@Phone", SqlDbType.NVarChar)).Value = Phone; 
      command.Parameters.Add(new SqlParameter("@Email", SqlDbType.NVarChar)).Value = Email; 
      command.Parameters.Add(new SqlParameter("@Message", SqlDbType.NVarChar)).Value = Message; 

      // try run command and set TicketID to the row inserted into the table. 
      try { 
       conn.Open(); 
       //run command 
       command.ExecuteNonQuery(); 

       //return scope identity of row. 
       TicketID = (int)command.Parameters["@TicketID"].Value; 
      } 
      catch (Exception e) { 
       //show -1 to state there is an error 
       TicketID = -1; 
      } 
     } 

     return TicketID; 
    } 
} 

Answer 1

1st 我认为你连接到错误的分贝，可能你是在主人。 运行这段代码并检查数据库的名称，看看它是否是你想要的。

public static string checkDB() 
{ 
    string dbName = ""; 
    using (var conn = new SqlConnection(constring)) 
    { 
     //create command 
     SqlCommand command = new SqlCommand(); 

     //tell the command which connection its using 
     command.Connection = conn; 

     //inform command that it is a stored procedure and the name of stored procedure 
     command.CommandText = "select DB_NAME()"; 
     command.CommandType = CommandType.Text; 

     // try run command and set TicketID to the row inserted into the table. 
     try 
     { 
      conn.Open(); 
      //run command 
      SqlDataReader reader = command.ExecuteReader(); 
      reader.Read(); 
      dbName = reader[0].ToString(); 
     } 
     catch (Exception e) 
     { 
     } 
    } 

    return dbName; 
} 

第二 您正在试图从参数@TicketID价值，但你没有指定这个参数作为输出参数。

command.Parameters.Add("@TicketID", SqlDbType.Int).Direction = ParameterDirection.Output; 

EDIT1： 这是你如何在连接字符串中把数据库名：

const string constring = @"Data Source=(localdb)\ProjectsV12;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=False;Initial Catalog=MY_DB_NAME";