Change panel border color at runtime-CodePudding

My problem is that i am trying to change a panel border color upon the activation of a textbox placed inside, any help will be much appreciated

CodePudding user response：

You can use the event Click of your TextBox (use the Property window from Form designer).

Then add the code:

    private void textbox1_Click(object sender, EventArgs e)
    {
        ControlPaint.DrawBorder(panel1.CreateGraphics(), panel1.ClientRectangle, Color.Red, ButtonBorderStyle.Solid);
    }

Obviously you can change the trigger event and adjust the color on your needs.

CodePudding user response：

I end up using the the enter and leave event of the text box as follow.

In the enter event

this.searchPanel.BorderStyle=BorderStyle.None;
        this.searchPanel.Refresh();
        ControlPaint.DrawBorder(
            graphics: this.searchPanel.CreateGraphics(),
            bounds: this.searchPanel.ClientRectangle,
            color: System.Drawing.Color.FromArgb(0,120,215),
            style: ButtonBorderStyle.Solid);

And in the leave event

this.searchPanel.BorderStyle = BorderStyle.FixedSingle;
this.searchPanel.Refresh();

Before After