Question

我有一个方法

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我将此参数ID传递给另一个类

中的另一个函数

getlisting(string url,int ID)

我将此传递给更新功能，并希望将默认值0分配给ID，将1分配给状态，然后将其返回并在数据库中进行更改，

 Controller __cc = new Controller();
                int Status = 1;
                __cc.UpdatePaging(ID, Status);

但我不能这样做。我的代码有问题吗？或告诉我如何为int分配0值并在数据库中更新它，每当我从public void UpdatePaging(int ID,int Status) { if (ID != null) { ID = 0; } else { ID = 0; } SqlCommand cmd = new SqlCommand("UPDATE Paging SET Status='1' WHERE ID = @ID", obj.openConnection()); cmd.CommandType = System.Data.CommandType.Text; cmd.Parameters.AddWithValue("@Status", SqlDbType.Int).Value = 1; cmd.Parameters.AddWithValue("@ID", SqlDbType.Int).Value = ID; cmd.ExecuteNonQuery(); }方法获得任何值时，它应该被指定为零并在DB中更新。

Answer 1

基于聊天你想要这个：

public void UpdatePaging(int ID,int Status)
    {

        SqlCommand cmd = new SqlCommand("UPDATE Paging SET Status='1' WHERE ID = @ID", obj.openConnection());
        cmd.CommandType = System.Data.CommandType.Text;
        cmd.Parameters.AddWithValue("@ID", SqlDbType.Int).Value = ID;
        cmd.ExecuteNonQuery();

    }

这将根据发送到函数的id

将状态设置为1

请注意，您的代码SET Status='1'代表SET Status=1

您还可以使您的代码更加通用：

public void UpdatePaging(int ID,int Status=1)
{
  SqlCommand cmd = new SqlCommand("UPDATE Paging SET Status=@Status WHERE ID = @ID", obj.openConnection());
  cmd.CommandType = System.Data.CommandType.Text;
  cmd.Parameters.AddWithValue("@ID", SqlDbType.Int).Value = ID;
  cmd.Parameters.AddWithValue("@Status", SqlDbType.Int).Value = Status;
  cmd.ExecuteNonQuery();
}

为变量分配默认值并更改为数据库

1 个答案: