[CLOSED] ControlParameter PropertyName for selected value of Combobox

[Manni]

I have two questions on how to use an object data source together with a combo box:

1. I am trying to use the selected value of a combobox as the control parameter for the select method of a object data source. Which property of the EXT combobox do I use? ('SelectedItem' generates the error "Type 'Ext.Net.ListItem' in Assembly 'Ext.Net, Version=2.1.0.21329, Culture=neutral, PublicKeyToken=2e12ce3d0176cd87' is not marked as serializable. " , 'SelectedValue' as with a standard ASP drop down list does not work.

<asp:ObjectDataSource ID="odsStatus" runat="server" SelectMethod="GetStatus" TypeName="Test.Models.Application" >
    <SelectParameters>
        <asp:ControlParameter ControlID="cbApplicationStatus" Name="ParentNode" PropertyName="SelectedValue" Type="Int32" 
DefaultValue="101"/>
    </SelectParameters>
</asp:ObjectDataSource>

2. Do I need to specify DirectEvents to pick up any selection changes and then pass it on to the object data source?

<ext:ComboBox ID="cbApplicationStatus" runat="server" Width="130" Editable="false" 
              DisplayField="Status"  ValueField="Node" 
               StoreID="storeApplicationStatusChildren"  QueryMode="Local">
    <DirectEvents>
        <Change OnEvent="cbApplicationStatus_Change"></Change>
    </DirectEvents>
</ext:ComboBox>

Here is the store:

<ext:Store ID="storeApplicationStatusChildren" runat="server" DataSourceID="odsStatus">
<Model>
    <ext:Model ID="modelApplicationStatusChildren" runat="server" IDProperty="Node">
        <Fields>
            <ext:ModelField Name="Status" Type="String" />
            <ext:ModelField Name="ParentNode" Type="Int" />
        </Fields>
    </ext:Model>
</Model>
</ext:Store>

Any help is greately appricated.
Manni

[Manni]

After some more research and testing I have come to the conclusion that 'SelectedItem' is the correct PropertyName for the SelectParameters of the object data source. However, using the code below, I get the following error message:

Type 'Ext.Net.ListItem' in Assembly 'Ext.Net, Version=2.1.0.21329, Culture=neutral, PublicKeyToken=2e12ce3d0176cd87' is not marked as serializable.

<ext:ComboBox ID="ComboBox1" runat="server" 
    QueryMode="Local" StoreID="store1" Editable="false" 
    DisplayField="Status" ValueField="Node" >
</ext:ComboBox>

<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" 
     SelectMethod="GetTest" TypeName="Test.Models.Application">
    <SelectParameters>
        <asp:ControlParameter ControlID="ComboBox1" DefaultValue="101" Name="ParentNode" 
           PropertyName="SelectedItem" Type="Int32" />
    </SelectParameters>
</asp:ObjectDataSource>


<ext:Store ID="store1" runat="server" DataSourceID="ObjectDataSource1">
    <Model>
        <ext:Model ID="model1" runat="server" IDProperty="Node">
            <Fields>
                <ext:ModelField Name="Status" Type="String" />
                <ext:ModelField Name="ParentNode" Type="Int" />
            </Fields>
        </ext:Model>
    </Model>
</ext:Store>

Can someone from the Dev Team or Support reproduce and confirm this behavior?

If not, where is my mistake?

Thanks!

[Daniil]

Hi @Manni,

Thank you for the question. We will investigate a possibility to get it working.

[Daniil]

For now we can suggest to use the ObjectDataSource Selecting event to manually manage the required parameter.

[Manni]

Thanks, Daniil. I got it to work with the Selecting event.

Will this issue be resolved with the next minor release?

[Daniil]

Will this issue be resolved with the next minor release?

I am not sure yet. We are still investigating.

[Manni]

I am not sure yet. We are still investigating.

Hi Daniil,
any update on this?
Manni

[Daniil]

I had another look at the issue and was unable to reproduce.

Here is my test case.

A SelectedItem property is a ListItem type. I think it is wrong to set up int type for the ControlParameter.

Example Page

<%@ Page Language="C#" %>
 
<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>

<script runat="server">
    protected void Rebind(object sender, DirectEventArgs e)
    {
        this.Store1.DataBind();
    }
</script>

<!DOCTYPE html>

<html>
<head runat="server">
    <title>Ext.NET v2 Example</title>
</head>
<body>
    <form runat="server">
        <ext:ResourceManager runat="server" />

        <ext:ComboBox ID="ComboBox1" runat="server" QueryMode="Local">
            <Items>
                <ext:ListItem Text="Item 1" Value="1" Mode="Raw" />
                <ext:ListItem Text="Item 2" Value="2" Mode="Raw" />
            </Items>
            <SelectedItems>
                <ext:ListItem Text="Item 1" Value="1" Mode="Raw" />
            </SelectedItems>
        </ext:ComboBox>
 
        <asp:ObjectDataSource 
            ID="ObjectDataSource1" 
            runat="server"
            TypeName="Test"
            SelectMethod="GetTest">
            <SelectParameters>
                <asp:ControlParameter 
                    ControlID="ComboBox1" 
                    Name="ParentNode"
                    PropertyName="SelectedItem" />
            </SelectParameters>
        </asp:ObjectDataSource>
 
        
        <ext:Store ID="Store1" runat="server" DataSourceID="ObjectDataSource1">
            <Model>
                <ext:Model runat="server">
                    <Fields>
                        <ext:ModelField Name="Status" Type="String" />
                        <ext:ModelField Name="ParentNode" Type="Int" />
                    </Fields>
                </ext:Model>
            </Model>
            <Listeners>
                <Load Handler="App.Container1.update(records[0].data);" />
            </Listeners>
        </ext:Store>

        <ext:Button runat="server" Text="Re-bind" OnDirectClick="Rebind" />

        <ext:Container ID="Container1" runat="server">
            <Tpl>
                <Html>
                    Status : {Status} <br/>
                    ParentNode : {ParentNode}
                </Html>
            </Tpl>
        </ext:Container>
    </form>
</body>
</html>

Test Class

using Ext.Net;

public class Test
{
    public object[] GetTest(ListItem ParentNode)
    {
        return 
            new object[] 
            { 
                new object[] { ParentNode.Text, int.Parse(ParentNode.Value) }
            };
    }
}

[Manni]

Thanks Daniil. I will have to revisit this issue and will let you know.

[Daniil]

Good. Please feel free to update the thread with any new related info despite it is marked closed.