Winforms C#.Add() 到 sql 数据库非常慢

Question

I have a Windows Forms Application written in C#. One form is a data entry form, with a save button.

Upon Clicking the Save Button, the code first converts all textboxes to Caps. Then it declares all the variables for the SQL table fields - to the identifying text boxes

ex (there are several of these types of binds)

var vlast = textBox_V_lname.Text;

All of this works super fast, as expected (I have used break points to find the hold up). And here, everything hangs. It hangs for about 30 seconds (that's a long long time, when you only have 900 records in the table).

var badger_History = new Badger_History() { v_noaccess_flag = myacess, v_lastname = vlast, v_firstname = vfirst, v_child = vchild, v_company = vcompany, v_issue_date = vdate, v_location = mylocation, comments = mycomments, h_lastname = hlast, h_firstname = hfirst, h_middle_init = hmiddle, h_title = htitle, h_phone = hphone, h_org = horg, h_work_location = hlocation, pass_type = type, pending_flag = pending };
            oBadger_History.Add(badger_History);

It hangs right here: oBadger_History.Add(badger_History);

badger_History being the model for the table insert. I can post the model itself, but that looks pretty normal.

I have certainly tried manually adding a record with SQL Manager, and that worked instantly, as expected.

I can't figure out what is causing the hang. When I hover over the 'oBadger_History.Add' and go to Definition, all I see is this line

public virtual void Add(EntityType entity);

Note: this is an application another staff member developed and has since retired. I usually don't work with Winforms applications and so - I am in over my head here.

Any insight or nudge in the right direction is appreciated.

I can add as much more code as needed - just wasn't sure if it was necessary to post more

Answer 1

Many thanks to all those who responded. It did give me some insight on what to look harder at.

Also - my apologies for taking so long to follow up. I am being handed failing apps left and right, to fix. And a different one had a high priority, but I finally got back to this one.

After looking at the responses and using that information to start looking at samples of other works online. . This is what actually ended up working for me:

public partial class frmBadgeCreate : daBaseForm
{

    private boBadger_History oBadger_History;
  public frmBadgeCreate()
    {
        if (daAppDesktop.IsRunning)
        {
            oBadger_History = new boBadger_History();
            oBadger_History.AutoGenerateContextIndex = true;
            oBadger_History.ReleaseContextonClose = true;
          
            oBadger_History.GetAll();

         }
            InitializeComponent();
         }

And then, the save (below) works perfect (about 2 seconds tops).

 var badger_History = new Badger_History() { v_noaccess_flag = myacess, v_lastname = vlast, v_firstname = vfirst, v_child = vchild, v_company = vcompany, v_issue_date = vdate, v_location = mylocation, comments = mycomments, h_lastname = hlast, h_firstname = hfirst, h_middle_init = hmiddle, h_title = htitle, h_phone = hphone, h_org = horg, h_work_location = hlocation, pass_type = type, pending_flag = pending, child_out_flag = childOutflag };
           
            oBadger_History.Add(badger_History);
  
            oBadger_History.Save();

Thank you to all those who offered some advice and assistance. It really did help me find my way here. I am not a winforms developer and totally out of my lane here - so thank you all so much!

Happy New Year Stackoverflow !

Answer 2

Instead of using the Add method, use the AddRange method. The latter is internally calculated based on dichotomy, and its performance is n * log (n), which is better than the former n * n.