将事件TextChanged分配给Form中的所有文本框 [英] Assigning event TextChanged to all textboxes in Form

问题描述

您好，我想知道如何监视Form中的所有文本框是否更改了它们的值。我看到了一些代码

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
}

写此代码的人说

所以我的问题是，因为我几乎在groubox或panel中都有每个文本框，如何查看是否进行了更改面板或组框中的文本框？

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

您可以使方法递归：

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
}

只需为该方法找到一个更好的名称而不是分配。

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

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