有没有办法消除散布式登录表单和主表单之间的延迟? [英] Is There a Way to Remove the Delay between an Interspersed Login form and the Main form?

问题描述

遵循建议此处在项目的Main方法中创建我的登录表单，如下所示:

Following the suggestion here to create my login form in the project's Main method like so:

[MTAThread]
static void Main()
{
    AppDomain.CurrentDomain.UnhandledException += Unhandled;

    frmLogin loginForm = new frmLogin();
    if (loginForm.ShowDialog() != DialogResult.OK)
    {
        // If they hit "Close" just use the default values for now (for testing)
        HHSConsts.userName = "duckbilled";
        HHSConsts.pwd = "platypus";
        HHSConsts.currentSiteNum = "Packers20Seahawks19";
    }
    else
    {
        HHSConsts.userName = loginForm.UserName;
        HHSConsts.pwd = loginForm.Password;
        HHSConsts.currentSiteNum = loginForm.SiteNumber;
    }
    loginForm.Dispose();

    Application.Run(new frmMain());
}

登录表单具有两个按钮，确定"和关闭":

The login form has two buttons, "OK" and "Close":

private void buttonOK_Click(object sender, EventArgs e)
{
    HHSConsts.userName = textBoxUsername.Text.Trim();
    HHSConsts.pwd = textBoxPwd.Text.Trim();
    HHSConsts.currentSiteNum = listBoxSitesWithFetchedData.SelectedItem.ToString();
    // TODO: Prevent shutdown if "OK" is selected and there are any missing or bogus values?
    this.Close();
}

private void buttonClose_Click(object sender, EventArgs e)
{
    this.Close();
}

这很正常，但是在关闭登录表单和显示主表单之间存在一定的延迟.有没有办法缩小这个差距，以使间隔不太明显?

This works pretty fair, but there is a definite delay between the login form closing and the main form displaying. Is there a way to close this gap so that the interval is not so noticeable?

替换此:

Application.Run(new frmMain());

...与此:

Application.Run(new Form());

Program.cs中的

...结果如下:

...in Program.cs results in the following:

单击登录表单上的确定"按钮:应用程序关闭(主表单从不显示)

Clicking the OK button on the login form: app closes (main form never displays)

单击登录表单上的关闭"按钮:登录表单上的所有控件都消失了，但表单仍然存在...?！?

Clicking the Close button on the login form: all the controls on the login form disappear, but the form stays up...?!?

推荐答案

尝试尽可能多地预加载主表单:

Try pre-loading the main form with as much as you can:

[MTAThread]
static void Main()
{
  var mainForm = new frmMain();

  using(loginForm = new frmLogin())
  {
    if (loginForm.ShowDialog() != DialogResult.OK)
    {
      // If they hit "Close" just use the default values for now (for testing)
      HHSConsts.userName = "duckbilled";
      HHSConsts.pwd = "platypus";
      HHSConsts.currentSiteNum = "Packers20Seahawks19";
    }
    else
    {
      HHSConsts.userName = loginForm.UserName;
      HHSConsts.pwd = loginForm.Password;
      HHSConsts.currentSiteNum = loginForm.SiteNumber;
    }
  }

  mainForm.NotifyTheFormInstanceTheCredentialsHaveChangedIfItIsNotEventDrivenAlready();

  Application.Run(mainForm);
}

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