Question

现在，这是我用于进入/离开的程序：

    private void tbFullName_Enter(object sender, EventArgs e)
    {
        if (tbFullName.Text == "Full name")
        {
            tbFullName.Text = "";
            tbFullName.ForeColor = Color.Black;
        }
    }

    private void tbFullName_Leave(object sender, EventArgs e)
    {
        if (tbFullName.Text == "")
        {
            tbFullName.Text = "Full name";
            tbFullName.ForeColor = SystemColors.InactiveCaption;
        }
    }

当我专注于另一个元素时它才会离开。当我点击背景或其他任何地方时，我希望它离开。我怎么能这样做？

Answer 1

不使用TextBox的Enter和Leave事件，而是使用GotFocus和LostFocus事件，其次从文本框中退出使用Form的Click事件来调用LostFocus事件。但在调用它之前禁用文本框并在调用启用文本框后如下面的代码

在表格初始化事件

    public Form()
    {
        InitializeComponent();

        //attach the events here
        tbFullName.GotFocus += TbFullName_GotFocus;
        tbFullName.LostFocus += TbFullName_LostFocus;
    }

TextBox这样的事件

    private void TbFullName_LostFocus(object sender, EventArgs e)
    {
        if (tbFullName.Text == "")
        {
            tbFullName.Text = "Full name";
            tbFullName.ForeColor = SystemColors.InactiveCaption;
        }
    }

    private void TbFullName_GotFocus(object sender, EventArgs e)
    {
        if (tbFullName.Text == "Full name")
        {
            tbFullName.Text = "";
            tbFullName.ForeColor = Color.Black;
        }
    }

最后，将表格的点击事件视为

    private void Form_Click(object sender, EventArgs e)
    {
        tbFullName.Enabled = false;       //disable the textbox
        TbFullName_LostFocus(sender, e);  //call lost focus event
        tbFullName.Enabled = true;        //enable the textbox
    }

此解决方法可能对您有所帮助。

Answer 2

您也可以使用此

private void Form1_Click(object sender, EventArgs e)
    {
        //your code here
    }

如何在其他地方点击时留下文本框？

2 个答案: