将事件 TextChanged 分配给表单中的所有文本框

Assigning event TextChanged to all textboxes in Form(将事件 TextChanged 分配给表单中的所有文本框)

问题描述

您好，我想知道如何查看 Form 中的所有 textboxes 是否有任何更改值.我看到了一些代码 这里

Hello I was wondering how can I keep an eye on all textboxes in Form whether in any of them was changed value. I saw some code here

private void Form1_Load(object sender, EventArgs e)
{
    foreach (Control ctrl in this.Controls)
    {
        if (ctrl is TextBox)
        {
            TextBox tb = (TextBox)ctrl;
            tb.TextChanged += new EventHandler(tb_TextChanged);
        }
    }
}

void tb_TextChanged(object sender, EventArgs e)
{
    TextBox tb = (TextBox)sender;
    tb.Tag = "CHANGED"; // or whatever
}

编写此代码的人说它不能分配给 Panels 和 Grouboxes 中的文本框".

And a guy who wrote this code says that "it can't be assigned to textboxes in Panels and Grouboxes".

所以我的问题是，因为我在组框或面板中几乎有每个文本框，我如何才能查看是否对面板或组框中的文本框进行了更改?

So my question is as I have almost every textbox in groubox or panel, how can I see whether change was made for textboxes in panels or groupbox?

推荐答案

你可以让你的方法递归:

You can make your method recursive:

private void Form1_Load(object sender, EventArgs e)
{
    Assign(this);
}

void Assign(Control control)
{
    foreach (Control ctrl in control.Controls)
    {
        if (ctrl is TextBox)
        {
            TextBox tb = (TextBox)ctrl;
            tb.TextChanged += new EventHandler(tb_TextChanged);
        }
        else
        {
            Assign(ctrl);
        }
    }
}

void tb_TextChanged(object sender, EventArgs e)
{
    TextBox tb = (TextBox)sender;
    tb.Tag = "CHANGED"; // or whatever
}

只需为方法找到一个更好的名称，而不是 Assign.

Just find a better name for the method instead of Assign.

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