如何关闭当前表单并显示另一个表单？ [英] How to close current form and show another one?

问题描述

我创建了一个C＃windows应用程序。

我想在第一个表单的加载事件中显示第二个表单，并在表单第二个表单打开后隐藏第一个表单。



我的尝试：

I had created a C# windows application.
I want to show second form at the load event of first form and hide that first form after form second is open.

What I have tried:

login l = new login();

using (SqlConnection cn = new SqlConnection(conn))
{
    int remains = getdifff();
    cn.Open();
    SqlCommand cmd = new SqlCommand("select ipaddress from KeyDetails where ipaddress='" + label1.Text + "' ", cn);
    SqlDataReader dr = cmd.ExecuteReader();
    if (dr.HasRows)
    {
        if (remains <= 365 && remains >= 1)
        {
            l.Show();
            this.Hide();
        }
        else
        {
            label4.Show();
        }
    }
    else
    {
        this.Show();
    }
    this.Hide();
}

推荐答案

可能是你在主表单加载它时试图显示启动画面数据。

看看这些：

简单易用的C＃SplashScreen，编码最少 [ ^ ]

[ ^ ]

Probably, you're trying to display a splash screen while your main form loads it's data.
Have a look at these:
Simple Easy C# SplashScreen with Minimal Coding[^]
Yet Another Splash Screen in C#[^]

如果login是第二种形式，则只需执行以下操作：

If "login" is the second form, you need only to do:

this.Hide();
login l = new login();
l.Show();

您可以在按钮单击事件上绑定此代码段以进行测试。

You can bind this snippet of code on a button-click event to test it.

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