Question

我想在textBox中显示当前表单Title 但是下面的代码不会这样做，它只有在我将它设置在Button1_click上时才有效。单击按钮后，它将更改为表单标题但我需要它在加载

时立即在文本框中设置表单标题

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Diagnostics;

namespace ShowTitle
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();

    }

    private void Form1_Load(object sender, EventArgs e)
    {
        Process currentp = Process.GetCurrentProcess();
        textBox1.Text = currentp.MainWindowTitle;


    }

    private void button1_Click(object sender, EventArgs e)
    {

    }
}
}

Answer 1

这个简单的代码演示了当调用Form.Load事件的事件处理程序时，没有从currentp读取的MainWindowTitle，而如果你在Form.Shown事件处理程序中执行相同的代码，则有一个Currentp变量中的MainWindowTitle

Form f;
TextBox t;
void Main()
{
    f = new Form();
    f.Text = "This is a test";
    t = new TextBox();
    f.Controls.Add(t);
    f.Load += onLoad;
    f.Shown += onShow;
    f.Show();
}
void onLoad(object sender, EventArgs e)
{
    Process currentp = Process.GetCurrentProcess();
    if(!string.IsNullOrWhiteSpace(currentp.MainWindowTitle))
        t.Text = currentp.MainWindowTitle;
    else
        t.Text = "NO TITLE";
}

void onShow(object sender, EventArgs e)
{
    // Uncomment these line to see the differences
    // if(!string.IsNullOrWhiteSpace(currentp.MainWindowTitle))
    //     t.Text = currentp.MainWindowTitle;
    // else
    //     t.Text = "NO TITLE";
}

加载时加载textBox表单标题

1 个答案: