在设计时计算并设置标签位置

Question

On a form I got a TabControl, and above this a Label. I always want the label to appear centered above the TabControl. The width of the TabControl changes (with anchors) if the width of the form is changed. Now I want the position (location) of the label to be adjusted accordingly.

At runtime this is easy:

//Position headline label
lblHeadline.Left = tabControl1.Left + (tabControl1.Width / 2) - (lblHeadline.Width / 2);

But how do I get Visual Studio to do this at design time, so if the width of the form is changed from the properties window, the label's position is automatically recalculated?

Answer 1

Winforms aren't that dynamic at design time, like @o_O alreday mentioned in his comment.

But in your case there's no need to center the Label programmically.
Like following, the label-Text will also be centered at design time:

• Set the AutoSize -Property of the Label to False

• Adjust the width of the Label to the same width as the TabControl

• Set the Anchor -Property of the Label to Top, Left, Right

• Set the TextAlign -Property of the Label to TopCenter