Windows 应用程序 (C#.Net)- 保留文本框值 [英] Windows Application (C#.Net)- Retain TextBox Values

问题描述

这是我的场景:(Windows 应用程序/C#.Net)

Here is my Scenario: (Windows Application/C#.Net)

我有一个 Form1，它正在使用选择为 Case 1 和 On Button Click it 的选项进行一些计算，将所有文本框值推送到 Form2.这工作正常.

I have a Form1 in that is doing some calculations with the option selected as Case 1 and On Button Click it Pushes all the textbox values to Form2. This is working fine.

现在，如果我再次进入 Form 1 并将选项更改为 case 2 并计算并按下 Button 它会删除之前添加的值.

Now if I come to Form 1 again and change the option to case 2 and calculate and press Button it erases the values that were added earlier.

我想保留这些值并将这些值添加到 Form2 中的另一组文本框.

I want to retain those values and add this values to another set of textboxes that are in Form2.

代码:在点击添加按钮后的表格 1 中:

Code: In Form 1 After Clicking ADD button:

private void button1_Click(object sender, EventArgs e)
    {
        Form2 eigthForm = new Form2();
        if(comboBox1.Text == "Case 1")
        {
            eigthForm.text2.Text = textBox1.Text;
            eigthForm.text3.Text = textBox8.Text;
        }   
        if (comboBox1.Text == "Case 2")
        {
            eigthForm.text4.Text = textBox1.Text;
            eigthForm.text5.Text = textBox8.Text;
        }

推荐答案

好的，我明白你现在在问什么.您可以使用单例模式作为一种方式如下

Ok I understand what you are asking now. You can use the Singleton pattern as one way as follows

Form1 按钮

private void button1_Click(object sender, EventArgs e)
{
    Form2.Instance.AddText1and2("Hello", "World");
}

private void button2_Click(object sender, EventArgs e)
{
    Form2.Instance.AddText3("Foo");
}

Form2 我们将改为单例模式

Form2 we will change to Singleton pattern

   private static volatile Form2 instance = null;
    private static object lockThis = new object();

    private Form2()
    {
        InitializeComponent();
    }

    public static Form2 Instance
    {
        get
        {
            if (instance == null)
            {
                lock(lockThis)
                {
                    if (instance == null)
                    {
                        instance = new Form2();
                    }
                }
            }
            return instance;
        }
    }

现在我们将文本放置在正确位置的方法

Now our methods to place text in the correct places

public void AddText1and2(string txt1, string txt2)
    {
        textBox1.Text = txt1;
        textBox2.Text = txt2;
        this.Show();
    }

    public void AddText3(string txt3)
    {
        textBox3.Text = txt3;
        this.Show();
    }

如果您希望能够关闭窗口并重新打开它以保存值，您需要使用表单关闭事件

If you want to be able to close the window and reopen it saving values you need to use the form closing event

private void Form2_FormClosing(object sender, FormClosingEventArgs e)
    {
        this.Hide();
        e.Cancel = true;
    }

您必须阻止实际关闭.这将处置该对象，而我们不希望那样.

You have to prevent the actual close. This will dispose the object and we don't want that.

这会将您的所有设置保留在表格 2 中.

This will keep all your settings in form 2.

如果你不想做上面的事情，你可以在你的项目中添加一个新类，做这样的事情

if you don't want to do the above you can add a new class to your project doing something like this

class Global
{
    public static string Value1 { get; set; }
    public static string Value2 { get; set; }
}

在 Form1 中

if(comboBox1.Text == "Case 1")
{
        Global.Value1 = textBox1.Text;
        Global.Value2 = textBox8.Text;
}   

在 Form2 加载事件中

in Form2 load event

text2.Text = Global.Value1;
text3.Text = Global.Value2;

<小时>

你还应该修改你的 if 逻辑如果它是案例 1"，则组合框永远不会 ==案例 2"，但您还在运行下一个if语句

---

You should also revise your if logic The combobox will never == "Case 2" if it's "Case 1" but you Are still running the next if statement

你应该使用这样的东西

if(comboBox1.Text.Equals("Case 1"))
{
}
else if (comboBox1.Text.Equals("Case 2"))
{
}

或

switch (comboBox1.Text)
{
    case "Case 1":
        //do stuff
    break;
    case "Case 2":
        //do stuff
    break;
}

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