如何通过双击事件修改动态创建的Label控件文本？

步骤1：完善动态Label创建代码 #

原代码缺少将Label添加到窗体控件集合的逻辑，同时需要绑定双击事件，修改后的代码如下：

for (int j = 0; j < Nitelik_Counter; j++)
{
    Label labeltest = new Label();
    labeltest.Text = "N - " + j.ToString();
    labeltest.TextAlign = ContentAlignment.MiddleCenter;
    labeltest.Location = new Point(10 + j * 70, 10);
    labeltest.Size = new Size(60, 20); // 固定大小，保证TextBox匹配
    labeltest.MouseDoubleClick += Label_MouseDoubleClick; // 绑定双击事件
    this.Controls.Add(labeltest); // 将Label添加到窗体
}

步骤2：实现Label双击事件，生成临时重命名输入框 #

双击Label时，创建一个与Label位置、大小完全匹配的TextBox，隐藏原Label并让TextBox获得焦点：

private void Label_MouseDoubleClick(object sender, MouseEventArgs e)
{
    Label targetLabel = sender as Label;
    if (targetLabel == null) return;

    TextBox renameBox = new TextBox();
    renameBox.Location = targetLabel.Location;
    renameBox.Size = targetLabel.Size;
    renameBox.Text = targetLabel.Text;
    renameBox.SelectAll(); // 选中全部文本，方便直接编辑
    renameBox.Tag = targetLabel; // 关联原Label，后续查找更可靠
    renameBox.KeyDown += RenameBox_KeyDown;
    renameBox.LostFocus += RenameBox_LostFocus;

    targetLabel.Visible = false;
    this.Controls.Add(renameBox);
    renameBox.Focus();
}

步骤3：实现重命名完成逻辑 #

通过回车事件或失去焦点事件触发重命名保存，将TextBox的文本同步到Label，并清理临时控件：

private void RenameBox_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Enter)
    {
        CompleteRename(sender as TextBox);
    }
}

private void RenameBox_LostFocus(object sender, EventArgs e)
{
    CompleteRename(sender as TextBox);
}

private void CompleteRename(TextBox renameBox)
{
    if (renameBox == null) return;

    Label targetLabel = renameBox.Tag as Label;
    if (targetLabel != null)
    {
        targetLabel.Text = renameBox.Text;
        targetLabel.Visible = true;
    }

    this.Controls.Remove(renameBox);
    renameBox.Dispose();
}

内容的提问来源于stack exchange，提问作者Sultan Çepni