Question

代码如下：

using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Writing_Data_To_SQL_Database_From_V_S
{
    class Program
    {
        static void Main(string[] args)
        {

            //1). Declare connection string

            string connectionString = "Data Source = LAPTOP - C5FEB2D0\\SQLEXPRESS;Initial Catalog = Upskilling;Integrated Security = True;MultipleActiveResultsSets = True;";

            //2). Write to Student table

            // Make use of the PopulateStudentTable method declared in Line 29 & "connectionString" as the argument

            PopulateStudentTable(connectionString); 

        }

        //3). This is outside the main method. 
        //    Declare specific method and argument to be used in populating said table (Student table)
        static void PopulateStudentTable(string connectionString)
        {
            //3a). Insert 1 record into the Student table
            string query = @"Insert Into [dbo].[Student](FirstName, LastName, City)
            Values('Dan, 'Smith', 'London')";

            //3b). Now, Connect to the SQL Server database 
            //3c). Use the Dependency - "Using System.Data.SqlClient;"
            using (SqlConnection connection = new SqlConnection(connectionString))
            {

            //3d). Reference the "connection" decalred in Line 34 - for it to open the database.
            //     Use the Open()

                connection.Open();

           //3e). Execute the command using a method that takes 2 parameters - "query" and "connection string"
           //     "query" & "connection" string were declared in Line 29 & 34 respectively.

                using(SqlCommand command = new SqlCommand(query, connection))
                {

           //3f). Use the command - "command" & the method - "ExecuteNonQuery()"

                    command.ExecuteNonQuery();

                }

            }

        }


    }
}

我收到的错误消息是：

未处理的异常：System.ArgumentException：不支持关键字：   “ multipleactiveresultssets”。在   System.Data.Common.DbConnectionOptions.ParseInternal（哈希表   可解析的，字符串连接字符串，布尔值buildChain，哈希表   同义词，布尔值firstKey）在   System.Data.Common.DbConnectionOptions..ctor（字符串connectionString，   哈希表同义词，布尔值useOdbcRules）位于   System.Data.SqlClient.SqlConnectionString..ctor（字符串   connectionString）在   System.Data.SqlClient.SqlConnectionFactory.CreateConnectionOptions（字符串   connectionString，DbConnectionOptions先前）在   System.Data.ProviderBase.DbConnectionFactory.GetConnectionPoolGroup（DbConnectionPoolKey   键，DbConnectionPoolGroupOptions poolOptions，DbConnectionOptions＆   userConnectionOptions）   System.Data.SqlClient.SqlConnection.ConnectionString_Set（DbConnectionPoolKey   键）   System.Data.SqlClient.SqlConnection.set_ConnectionString（字符串值）   在System.Data.SqlClient.SqlConnection..ctor（String connectionString，   SqlCredential凭据）位于   System.Data.SqlClient.SqlConnection..ctor（String connectionString）
  在   Writing_Data_To_SQL_Database_From_V_S.Program.PopulateStudentTable（String   connectionString）在   C：\ Users \ opeye \ Documents \ TESTING \ UPSKILLING \ UPSKILLING   PROJECTS \ Writing_Data_To_SQL_Database_From_V_S \ Writing_Data_To_SQL_Database_From_V_S \ Program.cs：line   37在Writing_Data_To_SQL_Database_From_V_S.Program.Main（String []   args）在C：\ Users \ opeye \ Documents \ TESTING \ UPSKILLING \ UPSKILLING   PROJECTS \ Writing_Data_To_SQL_Database_From_V_S \ Writing_Data_To_SQL_Database_From_V_S \ Program.cs：line   23按任意键继续。。

到目前为止，我还没有找到解决方案。

感谢您的帮助。

Answer 1

您输错了“ MultipleActiveResultsSets”。其中的“结果”不是复数。

正确的方法：“ MultipleActiveResultSets”。

尝试将记录插入数据库中的错误消息

1 个答案: