Is insertitem() method in observable collection is duplicate allowed or not..if try to add it will Argument out of range exception..

Question

1.00/5 (1 vote)

See more:

Insertitem() method in observable collection is duplicate allowed or not.
--- i have create tabsplitter control in wpf. The panel is collapse means it will collapse.
---i have added only bottom page.
---when panel is expand it will throw Exception in Argument outof range Exception.
i have use in below code
----------------------------------

C#

 protected override void InsertItem(int index, SplitterPage item)
        {
            base.InsertItem(index, item);//index 0 added item,index 1 add same item in it will throw Argument out of range Exception
            item.PageStorage = this;
            SelectedIndex = index;
        }
-----------------------------------
  internal void ExpandPanel(TabSplitterItem item, SplitterPagesCollection topItems, SplitterPagesCollection bottomItems)
        {
            SplitterPagesCollection bottomPages = item.BottomPages;

            if (bottomPages != null)
            {
                while (bottomPages.Count != 0)
                {
                    SplitterPage bottomPage = bottomPages[0];
                    bottomPage.ClearValue(SplitterPage.TabStripPlacementPropertyKey);

                    bottomPages.Remove(bottomPage);
                    topItems.Remove(bottomPage);

                    if (bottomPage.IsSelected || bottomPage.IsSelectedPage)
                    {
                        topItems.Remove(bottomPage);
                        var topPage = topItems[0];
                        topItems.Remove(topPage);
                        SplitterPage.SetTabStripPlacement(bottomPage,Dock.Bottom);
                        SplitterPage.SetTabStripPlacement(topPage, Dock.Top);
                        UpdateSkinToContent(topPage);
                        UpdateSkinToContent(bottomPage);
                        bottomItems.Add(topPage);
                        topItems.Add(bottomPage);
                    }
                    else
                    {
                        UpdateSkinToContent(bottomPage);
                        bottomItems.Add(bottomPage);
                    }
                }
            }
        }

Posted 3-Sep-15 1:52am

Member 11823120

Updated 3-Sep-15 2:03am

CHill60

v2

Add a Solution

Comments

CHill60 3-Sep-15 8:07am

I doubt that this has any thing to do with duplicates. Try debugging and checking the value of variables ... particularly bottomPage when you try to add it.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sinisa Hajnal · Accepted Answer · 2015-09-03T20:12:00

I think you misunderstand indexes in this case. You add one page (bottom or top, not relevant). That is your index 0. When you do this:

C#

topItems.Remove(bottomPage);

You're removing the element from topItems...if that was the only element, your next reference

C#

var topPage = topItems[0];

will be out of range.

Put a breakpoint into the method and go step by step.