private void button4_Click(object sender, System.EventArgs e)
{
string sql = "select * from DoorControl";
System.Data.SqlClient.SqlCommand sqlcommand = new System.Data.SqlClient.SqlCommand(sql, DBTools.conn);
System.Data.SqlClient.SqlDataReader sr = sqlcommand.ExecuteReader();
} private void button5_Click(object sender, System.EventArgs e)
{
string sql = "select * from DoorControl";
System.Data.SqlClient.SqlCommand sqlcommand = new System.Data.SqlClient.SqlCommand(sql, DBTools.conn);
System.Data.SqlClient.SqlDataReader sr = sqlcommand.ExecuteReader();
}
这样也不行
是不是一个连接只能有一个SqlDataReader??????????
{
string sql = "select * from DoorControl";
System.Data.SqlClient.SqlCommand sqlcommand = new System.Data.SqlClient.SqlCommand(sql, DBTools.conn);
System.Data.SqlClient.SqlDataReader sr = sqlcommand.ExecuteReader();
} private void button5_Click(object sender, System.EventArgs e)
{
string sql = "select * from DoorControl";
System.Data.SqlClient.SqlCommand sqlcommand = new System.Data.SqlClient.SqlCommand(sql, DBTools.conn);
System.Data.SqlClient.SqlDataReader sr = sqlcommand.ExecuteReader();
}
这样也不行
是不是一个连接只能有一个SqlDataReader??????????
{
string sql = "select * from DoorControl";
System.Data.SqlClient.SqlCommand sqlcommand = new System.Data.SqlClient.SqlCommand(sql, DBTools.conn);
System.Data.SqlClient.SqlDataReader sr = sqlcommand.ExecuteReader();
sr.close()
} private void button5_Click(object sender, System.EventArgs e)
{
string sql = "select * from DoorControl";
System.Data.SqlClient.SqlCommand sqlcommand = new System.Data.SqlClient.SqlCommand(sql, DBTools.conn);
System.Data.SqlClient.SqlDataReader sr = sqlcommand.ExecuteReader();
sr.close()
}