Add Control Value before another Control value in C#

Question

I have a "FlowLayoutPanel" and want to add series of "UserControl" to it:

mainPanel.Controls.Add(fx);

Every new usercontrol added after old one, I want to add new usercontrol before the previous usercontrol that was added how could I do this? I didn't find any functionality like mainPanel.Controls.AddAt(...) or mainPanel.Controls.Add(index i, Control c) or mainPanel.Controls.sort(...) or ... .

score 29 · Accepted Answer · answered May 09 '12 at 13:27

29

You can use the SetChildIndex method. Something like (maybe you need to fiddle with the indecies):

var prevIndex = mainPanel.Controls.IndexOf(previouslyAdded)
mainPanel.Controls.Add(fx);
mainPanel.Controls.SetChildIndex(fx, prevIndex);

answered May 09 '12 at 13:27

nemesv

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General Grey · Answer 2 · 2012-05-09T13:31:14.330

4

by the sounds of it you want to change the flowdirection attribute so that newest controls added are added to the top

flowLayoutPanel1.FlowDirection = FlowDirection.BottomUp;

or you could

 Label label1 = new Label();
 flowLayoutPanel1.Controls.Add(label1);
 label1.BringToFront();

edited May 09 '12 at 13:31

answered May 09 '12 at 13:23

General Grey

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If I change flow direction my problem don't solve, it just add from right to left instead of left to right, but still add after old userControl – Am1rr3zA May 09 '12 at 13:26
But if it is adding from left to right does it not layout like oldest control to far right newest control to far left? – General Grey May 09 '12 at 13:27
Sorry I had my second option backwards... I had SendToBack should have been BringToFront – General Grey May 09 '12 at 13:31

score 0 · Answer 3 · answered May 09 '12 at 13:23

0

Correcting myself: myPanel.Controls.AddAt(index, myControl)

answered May 09 '12 at 13:23

Anderson Pimentel

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No, there is not such method, we just have Add(). – Am1rr3zA May 09 '12 at 13:25
Nevermind, I was thinking about ASP.NET WebForms. I think you're dealing with WPF, right? If so, please retag. – Anderson Pimentel May 09 '12 at 13:27

score 0 · Answer 4 · answered Oct 11 '13 at 00:28

Something like this will add a control in alphabetical order.

                    FlowLayoutPanel flowLayoutPanel = ...; // this is the flow panel
                    Control control = ...; // this is the control you want to add in alpha order.

                    flowLayoutPanel.SuspendLayout();
                    flowLayoutPanel.Controls.Add(control);

                    // sort it alphabetically
                    for (int i = 0; i < flowLayoutPanel.Controls.Count; i++)
                    {
                        var otherControl = flowLayoutPanel.Controls[i];
                        if (otherControl != null && string.Compare(otherControl.Name, control.Name) > 0)
                        {
                            flowLayoutPanel.Controls.SetChildIndex(control, i);
                            break;
                        }
                    }

                    flowLayoutPanel.ResumeLayout();

Add Control Value before another Control value in C#

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