C# 使用ADO.NET更新一行中的多个列

我正在做一个项目（不是公开的），我正在尝试使用ADO.NET更新我的数据库代码。我已经为insert、retrieve all、retrieve by ID和retrieve by status编写了工作代码，我似乎无法理解的是更新。我已经做了相当多的搜索，我的代码是我找到的信息的代表，并试图适应我的程序。我只是使用垃圾数据，以便在使用任何有形数据之前尝试查看更新

下面是我在一个专门用于查询的类中的查询代码

public Ticket UpdateTicket(int id, string status, int customerId, int helpDeskStaffId, string problemDesc, string resolution, string followUpRequired, string followUpComplete, DateTime ticketDate, DateTime resolvedDate)
    {
        Ticket ticket = new Ticket(id, status, customerId, helpDeskStaffId, problemDesc, resolution, followUpRequired, followUpComplete, ticketDate, resolvedDate);
        SqlCommand cmdInsert;
        SqlConnection conn = null;
        try
        {
            string connectString = ConfigurationManager.ConnectionStrings[connectionStringName].ConnectionString;
            conn = new SqlConnection(connectString);
            "UPDATE Ticket SET Status = @Status, HelpDeskStaffId = @HelpDeskStaffId, ProblemDesc = @ProblemDesc, Resolution = @Resolution, FollowUpRequired = @FollowUpRequired, FollowUpComplete = @FollowUpComplete, TicketDate = @TicketDate, ResolvedDate = @ResolvedDate, CustomerId = @CustomerId WHERE TicketId=@id";
            conn.Open();
            cmdInsert = new SqlCommand(sql2, conn);
            cmdInsert.Parameters.AddWithValue("@id", id);
            cmdInsert.Parameters.AddWithValue("@Status", status);
            cmdInsert.Parameters.AddWithValue("@HelpDeskStaffId", helpDeskStaffId);
            cmdInsert.Parameters.AddWithValue("@ProblemDesc", problemDesc);
            cmdInsert.Parameters.AddWithValue("@Resolution", resolution);
            cmdInsert.Parameters.AddWithValue("@FollowUpRequired", followUpRequired);
            cmdInsert.Parameters.AddWithValue("@FollowUpComplete", followUpComplete);
            cmdInsert.Parameters.AddWithValue("@TicketDate", ticketDate);
            cmdInsert.Parameters.AddWithValue("@ResolvedDate", resolvedDate);
            cmdInsert.Parameters.AddWithValue("@CustomerId", customerId);

        }
        catch (SqlException ex)
        {
            Console.Error.WriteLine(ex.Message);
        }
        finally
        {
            if (conn != null)
                conn.Close();
        }
        return ticket;
    }

与输入的ID相关的行中没有更新数据

TicketUtil ticketUtil = new TicketUtil();
            Ticket ticket = ticketUtil.UpdateTicket(6, "Open", 1, 3, "Broken Pencils", "Buy New One", "No", "No", DateTime.Today, new DateTime(1753, 1, 1));

---

我的最终目标是能够使用这一行上面的代码硬编码更新，然后将其与一些控制台提示一起使用，以允许更新信息。然而，即使无法硬编码解决方案，我也无法考虑用户输入版本

您的更新声明似乎有误。 请尝试以下方法：

UPDATE Ticket 
SET Status = @Status, 
HelpDeskStaffId = @HelpDeskStaffId, 
ProblemDesc = @ProblemDesc, 
Resolution = @Resolution, 
FollowUpRequired = @FollowUpRequired, 
FollowUpComplete = @FollowUpComplete, 
TicketDate = @TicketDate, 
ResolvedDate = @ResolvedDate, 
CustomerId = @CustomerId 
WHERE TicketId=@id;

更新
正如Alex K.在评论中所写，您没有执行命令

我认为您的代码应该是这样的：

public Ticket UpdateTicket(int id, string status, int customerId, int helpDeskStaffId, string problemDesc, string resolution, string followUpRequired, string followUpComplete, DateTime ticketDate, DateTime resolvedDate)
{
    var ticket = new Ticket(id, status, customerId, helpDeskStaffId, problemDesc, resolution, followUpRequired, followUpComplete, ticketDate, resolvedDate);

    var connectString = ConfigurationManager.ConnectionStrings[connectionStringName].ConnectionString;            
    var sql2 = "UPDATE Ticket SET Status = @Status, HelpDeskStaffId = @HelpDeskStaffId, ProblemDesc = @ProblemDesc, Resolution = @Resolution, FollowUpRequired = @FollowUpRequired, FollowUpComplete = @FollowUpComplete, TicketDate = @TicketDate, ResolvedDate = @ResolvedDate, CustomerId = @CustomerId WHERE TicketId=@id";

    using(var conn = new SqlConnection(connectString))
    {
        using(var cmd = new SqlCommand(sql2, conn))
        {
        cmd.Parameters.AddWithValue("@id", id);
        cmd.Parameters.AddWithValue("@Status", status);
        cmd.Parameters.AddWithValue("@HelpDeskStaffId", helpDeskStaffId);
        cmd.Parameters.AddWithValue("@ProblemDesc", problemDesc);
        cmd.Parameters.AddWithValue("@Resolution", resolution);
        cmd.Parameters.AddWithValue("@FollowUpRequired", followUpRequired);
        cmd.Parameters.AddWithValue("@FollowUpComplete", followUpComplete);
        cmd.Parameters.AddWithValue("@TicketDate", ticketDate);
        cmd.Parameters.AddWithValue("@ResolvedDate", resolvedDate);
        cmd.Parameters.AddWithValue("@CustomerId", customerId);
        try
        {
            conn.Open();
            cmd.ExecuteNonQuery();
        }
        catch (SqlException ex)
        {
            Console.Error.WriteLine(ex.Message);
        }
        }
    }
    return ticket;
}

---

你的更新声明似乎是错误的。 请尝试以下方法：

UPDATE Ticket 
SET Status = @Status, 
HelpDeskStaffId = @HelpDeskStaffId, 
ProblemDesc = @ProblemDesc, 
Resolution = @Resolution, 
FollowUpRequired = @FollowUpRequired, 
FollowUpComplete = @FollowUpComplete, 
TicketDate = @TicketDate, 
ResolvedDate = @ResolvedDate, 
CustomerId = @CustomerId 
WHERE TicketId=@id;

更新
正如Alex K.在评论中所写，您没有执行命令

我认为您的代码应该是这样的：

public Ticket UpdateTicket(int id, string status, int customerId, int helpDeskStaffId, string problemDesc, string resolution, string followUpRequired, string followUpComplete, DateTime ticketDate, DateTime resolvedDate)
{
    var ticket = new Ticket(id, status, customerId, helpDeskStaffId, problemDesc, resolution, followUpRequired, followUpComplete, ticketDate, resolvedDate);

    var connectString = ConfigurationManager.ConnectionStrings[connectionStringName].ConnectionString;            
    var sql2 = "UPDATE Ticket SET Status = @Status, HelpDeskStaffId = @HelpDeskStaffId, ProblemDesc = @ProblemDesc, Resolution = @Resolution, FollowUpRequired = @FollowUpRequired, FollowUpComplete = @FollowUpComplete, TicketDate = @TicketDate, ResolvedDate = @ResolvedDate, CustomerId = @CustomerId WHERE TicketId=@id";

    using(var conn = new SqlConnection(connectString))
    {
        using(var cmd = new SqlCommand(sql2, conn))
        {
        cmd.Parameters.AddWithValue("@id", id);
        cmd.Parameters.AddWithValue("@Status", status);
        cmd.Parameters.AddWithValue("@HelpDeskStaffId", helpDeskStaffId);
        cmd.Parameters.AddWithValue("@ProblemDesc", problemDesc);
        cmd.Parameters.AddWithValue("@Resolution", resolution);
        cmd.Parameters.AddWithValue("@FollowUpRequired", followUpRequired);
        cmd.Parameters.AddWithValue("@FollowUpComplete", followUpComplete);
        cmd.Parameters.AddWithValue("@TicketDate", ticketDate);
        cmd.Parameters.AddWithValue("@ResolvedDate", resolvedDate);
        cmd.Parameters.AddWithValue("@CustomerId", customerId);
        try
        {
            conn.Open();
            cmd.ExecuteNonQuery();
        }
        catch (SqlException ex)
        {
            Console.Error.WriteLine(ex.Message);
        }
        }
    }
    return ticket;
}

---

你在哪里执行命令？您似乎也在使用现有值+新值进行更新？这真的是你想做的吗？@alexK。很抱歉，忘了提到执行发生在Program（driver/Main）类中。现在我看到收集了两次值，我正在尝试输入其他ADO.NET线程中使用的方法。我的意思是

cmdInsert.ExecuteNonQuery（）

？如果你不执行，那么预期的行为就是不执行。@AlexK。仍在学习中，这行代码+Zohar Peled建议的更改解决了问题。您在哪里执行该命令？您似乎也在使用现有值+新值进行更新？这真的是你想做的吗？@alexK。很抱歉，忘了提到执行发生在Program（driver/Main）类中。现在我看到收集了两次值，我正在尝试输入其他ADO.NET线程中使用的方法。我的意思是

cmdInsert.ExecuteNonQuery（）

？如果你不执行，那么预期的行为就是不执行。@AlexK。仍然在学习，这句话+Zohar Peled建议的改变解决了这个问题。尝试这个，没有运气。没有收到任何错误。谢谢你和AlexK。感谢你花时间回应。非常感谢。很高兴能帮助：-）尝试这个，运气不好。没有收到任何错误。谢谢你和AlexK。感谢你花时间回应。非常感谢。很高兴帮助：-）