[CLOSED] Multicombo Items

[FAS]

Hi.

I have a multicombo populated with at least 5 items.
I select many of them and need to iterate server side throught all items and check for selection so to persist a many to many collection.

For each Item in Combo check if it is selected. If so, check if it is added to the Entity, if not, Add.
If it is not selected, check if it is in entity. If so, remove.

The problem is that I am getting no Items in Combo.Items, but I am getting all Combo.SelectedItems.

Control in aspx

<ext:MultiCombo ID="mcmbCategories" runat="server" SelectionMode="All" Width="300" FieldLabel="Categories"
                DisplayField="Category_Name"
                                     ValueField="Category _Id"
                                       EmptyText="Select one or many"
                                          Editable="false"
                                           TypeAhead="false">
                    <Store>
                        <ext:Store ID="CategoryStore" runat="server" DataSourceID="CategoryList" OnRefreshData="CategoryRefresh">
                            <Reader>
                                <ext:JsonReader IDProperty="Category _Id">
                                    <Fields>
                                        <ext:RecordField Name="Category _Name" />
                                        <ext:RecordField Name="Category _Id" />
                                    </Fields>
                                </ext:JsonReader>
                            </Reader>
                           
                        </ext:Store>
                    </Store>
                </ext:MultiCombo>

Code behind

Refreshing method:

Public Sub CategoryRefresh(ByVal sender As Object, ByVal e As StoreRefreshDataEventArgs)


        mcmbCategories.DataBind()


    End Sub

Items iteration

           '"pPhone" is arriving by parameter as an instance of Phone entity.

          For Each mItem As ListItem In mcmbCategories.Items     '<--- HERE, NO ITEMS RETURNED. "FOR" BYPASSED


            Dim mVal As String = mItem.Value
            Dim mSelected As Boolean = False

            'DEBUGGING I CHECK THAT SelectedItems DOES RETURN ALL SELECTED ITEMS
            If (From mSel As SelectedListItem In mcmbCategories.SelectedItems Select mSel Where mSel.Value = mVal).Count > 0 Then
                'Its selected
                mSelected = True
            End If


            Dim mCat As Category = (From cc As Category In pPhone.Categories Select cc Where cc.Id = mVal).FirstOrDefault
            
            If Not IsNothing(mCat) Then
                'Category already in phone


                If Not mSelected Then
                    pPhone.Categories.Delete(mCat)
                End If
            Else
                'Not in phone yet


                If mSelected Then
                    pPhone.Categories.Add(New Category (mItem.Value))
                End If
            End If


        Next

Also I am checking regular Items against SelectedItems using Linq because I couldn't find a way to check if the Item is selected or not (something like mItem.IsSelected)

Thanks
Regadrs
Fernando

[Daniil]

Hi,

The problem is that I am getting no Items in Combo.Items

Yes, because you populate the MultiCombo via Store. An Items collection is not populated automatically.

You should get these Items from the CategoryList DataSource.

[FAS]

Thanks.

Any helpful code?

You mean this?

For Each mItem as ListItem in CategoryList.Store(0).WhatAttribute???

       mItem.ValueOrWhatField???   (then I need the value for each listed item (selected or not)

I guess ListItem shouldn't be the listed type.

Will the store get refreshed for this iteration?

I would like to iterate throught items just as they are in client at the submit moment.

Thanks
Regrds
Fernando

[Daniil]

I meant iterating the DataSource object.

I would like to iterate throught items just as they are in client at the submit moment.

I can suggest this way to get all Items values.

Example

<%@ Page Language="C#" %>

<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>

<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!X.IsAjaxRequest)
        {
            Store store = this.MultiCombo1.GetStore();
            store.DataSource = new object[] 
            { 
                new object[] { "1", "item1" },
                new object[] { "2", "item2" },
                new object[] { "3", "item3" }
            };
            store.DataBind();
        }
    }

    protected void Submit(object sender, DirectEventArgs e)
    {
        string itemsJson = e.ExtraParams["items"];
        Dictionary<string, string>[] dictItems = JSON.Deserialize<Dictionary<string, string>[]>(itemsJson);
        SelectedListItemCollection items = JSON.Deserialize<SelectedListItemCollection>(itemsJson);

        string result = "";

        foreach (Ext.Net.SelectedListItem item in items) 
        {
            result += string.Format("Value: {0}<br/>", item.Value);
        }

        X.Msg.Alert("Submit", result).Show();
    }
</script>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Ext.NET Example</title>
</head>
<body>
    <form runat="server">
        <ext:ResourceManager runat="server" />
        <ext:MultiCombo ID="MultiCombo1" runat="server">
            <Store>
                <ext:Store runat="server">
                    <Reader>
                        <ext:ArrayReader>
                            <Fields>
                                <ext:RecordField Name="value" />
                                <ext:RecordField Name="text" />
                            </Fields>
                        </ext:ArrayReader>
                    </Reader>
                </ext:Store>
            </Store>
        </ext:MultiCombo>
        <ext:Button runat="server" Text="Submit">
            <DirectEvents>
                <Click OnEvent="Submit">
                    <ExtraParams>
                        <ext:Parameter 
                            Name="items" 
                            Value="MultiCombo1.getStore().getRecordsValues({ excludeId : true })" 
                            Mode="Raw" 
                            Encode="true" />
                    </ExtraParams>
                </Click>
            </DirectEvents>
        </ext:Button>
    </form>
</body>
</html>

[FAS]

Thanks

That works, anyway I thought it could be more straightforward.

In this particular case I decided to just get all data again to iterate all categories (as Categories are a few, they are cached in dataCache)

Anyway, for more heavy queries I'll think better to implement this solution.

Thanks
Regards
Fernando