同時在數據庫中插入多行數據c＃

Question

我試着同時在多線程數據庫上寫數據
但myCommand.Connection.Open（）中發生錯誤;
錯誤：未將對象引用設置爲對象的實例。
我該如何解決這個問題？

這個例子說明問題

private void button1_Click(object sender, EventArgs e) 
    { 
     new Thread(() => 
     { 
      SqlCommand myCommand = new SqlCommand("insert into table(a,b)values(1,'aaa')", Connection); 
      myCommand.Connection.Open(); 
      myCommand.ExecuteNonQuery(); 
      myCommand.Connection.Close(); 
     }).Start(); 
     new Thread(() => 
     { 
      SqlCommand myCommand = new SqlCommand("insert into table(a,b)values(2,'aaa')", Connection); 
      myCommand.Connection.Open(); 
      myCommand.ExecuteNonQuery(); 
      myCommand.Connection.Close(); 
     }).Start(); 
     new Thread(() => 
     { 
      SqlCommand myCommand = new SqlCommand("insert into table(a,b)values(3,'aaa')", Connection); 
      myCommand.Connection.Open(); 
      myCommand.ExecuteNonQuery(); 
      myCommand.Connection.Close(); 
     }).Start(); 
     new Thread(() => 
     { 
      SqlCommand myCommand = new SqlCommand("insert into table(a,b)values(4,'aaa')", Connection); 
      myCommand.Connection.Open(); 
      myCommand.ExecuteNonQuery(); 
      myCommand.Connection.Close(); 
     }).Start(); 
    } 

Answer 1

你需要一個有效的連接：

SqlConnection connection = new SqlConnection(...); 
connection.Open(); 

SqlCommand command = new SqlCommand(...); 
command.Connection = connection; 
command.ExecuteNonQuery(); 

Answer 2

不清楚爲什麼你需要/想這樣做，在SQL2K8你可以簡單地使用表值構造函數單行< 1k行;

insert into table(a,b)values(1,'aaa'),(2,'aaa'),(3,aaa)