Agregar etiqueta con cuadro de texto en tiempo de diseño

I am creating a project using VS.NET (C#) with many forms that contain textboxes and associated labels. I have created the association through an exposed property I created for the textbox which contains the label name. The problem is that each time I add a textbox at design-time I have to add a label and then enter the label name into the property of the textbox. I would much rather do this dynamically at design-time when I create the textbox, much like the old VB textbox add. I have been scouring the net for a way to dynamically add a label whenever I add a textbox at design-time without finding any acceptable solutions. I found an answer on this site that suggested adding a user control containing a textbox and label, and though it is probably the best solution I have found, I think it restricts me more than I would like. Do I have to go through some full-blown custom designer to do this hopefully simple task?

TIA

preguntado el 28 de mayo de 14 a las 14:05

Ver Agregar etiqueta dentro del control de cuadro de texto -

Sounds like a job for a macro but as I have never used them in VS, it may well be beyond their possiblities.. -

I like the solution at stackoverflow.com/a/23891744/719186 that LarsTech referred to and many may believe it is a better solution since it works and is probably easier to work with for the question I asked, but for my purposes, the answer that Arie gave works best for me. Thank you all as always for quick replies. -

2 Respuestas

Although I like the solution that uses UserControl better (simpler and easier to handle), but there may be some cases where not creating one more thing that will eat the resources is preferable (for example if you need a lot of such label-textbox pairs on one form).

The simplest solution I came up with is as follows (the label shows in the designer after you build the project):

public class CustomTextBox : TextBox
    {
        public Label AssociatedLabel { get; set; }

        public CustomTextBox():base()
        {
            this.ParentChanged += new EventHandler(CustomTextBox_ParentChanged);
        }

        void CustomTextBox_ParentChanged(object sender, EventArgs e)
        {
            this.AutoAddAssociatedLabel();
        }

        private void AutoAddAssociatedLabel()
        {
            if (this.Parent == null) return;

            AssociatedLabel = new Label();
            AssociatedLabel.Text = "Associated Label";
            AssociatedLabel.Padding = new System.Windows.Forms.Padding(3);

            Size s = TextRenderer.MeasureText(AssociatedLabel.Text, AssociatedLabel.Font);
            AssociatedLabel.Location = new Point(this.Location.X - s.Width - AssociatedLabel.Padding.Right, this.Location.Y);

            this.Parent.Controls.Add(AssociatedLabel);
        }
    }

Although it isn't a complete solution, you need to code the additional behaviour such as moving the label with the textbox, changing the location of the label when its text changes, removing the label when the textbox is removed, and so on.

Another solution would be to not use the label at all, and just draw the text beside the textbox manually.

contestado el 28 de mayo de 14 a las 15:05

Another solution would be to not use the label at all, and just draw the text beside the textbox manually. I like that! - Taw

As you say, it takes a little more coding to be complete, but thus far this does just what I was looking for. Thanks! - Perro viejo

I'm afraid not, you would have to use either UserControl or CustomControl as there is no way to add a TextBox Y asociados Label al mismo tiempo

contestado el 28 de mayo de 14 a las 14:05

No es la respuesta que estás buscando? Examinar otras preguntas etiquetadas or haz tu propia pregunta.