After adding a column into the collection editor using ADD button of collection editor , but if user clicks on cancel buttonbefore it is saved,still column exists in collection editor. how to resolve?
Expected result was column should not be there.
ColumnCollectionEdiotro.cs

public

class ColumnCollectionEditor : CollectionEditor
{

}

--------------------------------

ColumnCollection.cs

public

class ColumnCollection : Collection<T>
{
// Inside this i have overrided the following methods

protected override void InsertItem(int index, T item)

{

base.InsertItem(index, item);

item.Grid =

this.Grid;

OnItemAdded(

new ColumnsEventArgs(item)); ;

}

protected override void RemoveItem(int index)

{

ColumnBase col = this[index];

base.RemoveItem(index);

OnItemsRemoved(

new ColumnsEventArgs(col));

}

protected override void ClearItems()

{

base.ClearItems();

OnItemsCleared(

new ColumnsEventArgs(null));

}

}

Hi,

 

Sorry. I am not able to reproduce this issue base on your code. I add an item and cancel, then open the edit form, the item doesn’t show. The following is my test.

    public partial class UserControl1 : UserControl

    {

        public UserControl1()

        {

            InitializeComponent();

            base.BorderStyle = BorderStyle.FixedSingle;

        }

 

        private ColumnCollection _TestSimpleItems = new ColumnCollection();

        [Category("Collections")]

 

        public ColumnCollection TestSimpleItems

        {

            get { return _TestSimpleItems; }

        }

    }

/////////////////////////

    public class TestGrid

    {

        public DataGridView Grid = new DataGridView();

    }

 

    public class ColumnCollection : Collection<TestGrid>

    {

        // Inside this i have overrided  the following methods

        public DataGridView Grid = new DataGridView();

        protected override void InsertItem(int index, TestGrid item)

        {           

            base.InsertItem(index, item);

            item.Grid = this.Grid;

            //OnItemAdded(new ColumnsEventArgs(item));

        }

 

        protected override void RemoveItem(int index)

        {

            //ColumnBase col = this[index];

            base.RemoveItem(index);

           //OnItemsRemoved(new ColumnsEventArgs(col));

        }

 

        protected override void ClearItems()

        {

            base.ClearItems();

            //OnItemsCleared(new ColumnsEventArgs(null));

        }

    }

 

Besides, it seems you have created a new CollectionEditor. I am not very sure if there are something causing this issue.

The following is an example about working with CollectionEditor. Hope this helps.

How to Edit and Persist Collections with CollectionEditor

http://www.codeproject.com/KB/cs/dzcollectioneditor.aspx

 

Best regards,

Ling Wang

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