Questions on UI for ASP.NET AJAX Forum

15 answers

1.7K+ views

Using DynamicObject as a datasource (or ExpandoObject)

Hello,

I did find some information, but that was on other forums.

Now we have DynamicObject (or ExpandoObject, that's an implementation of DynamicObject as I understood) we, of course, want it to bind to a RadGrid. There is no thread or blog I can find on this issue. It's also a bit of a Sunday afternoon thing for now.

I was wondering what Telerik thinks of this usage, what would be your approach..
And also this tread can grow to be of use to others, that's the main gaol..

We have a dynamic class:

Imports System.IO

Imports System.Dynamic

Public Class DynamicDictionary

Inherits DynamicObject

' The inner dictionary.

Dim mdic_PropertyHolder As New Dictionary(Of String, Object)

' This property returns the number of elements in the inner dictionary.

ReadOnly Property Count As Integer

Get

Return mdic_PropertyHolder.Count

End Get

End Property

ReadOnly Property Items As Dictionary(Of String, Object)

Get

Return mdic_PropertyHolder

End Get

End Property

Public Function GetMembers() As String()

Return mdic_PropertyHolder.Keys.ToArray

End Function

Public Property Item(ByVal PropertyName As String) As String

Get

Return mdic_PropertyHolder(PropertyName)

End Get

Set(ByVal value As String)

mdic_PropertyHolder(PropertyName) = value

End Set

End Property

' If you try to get a value of a property that is not defined in the class, this method is called.

Public Overrides Function TryGetMember(ByVal binder As System.Dynamic.GetMemberBinder, ByRef result As Object) As Boolean

' Converting the property name to lowercase

' so that property names become case-insensitive.

Dim name As String = binder.Name.ToLower()

' If the property name is found in a dictionary, set the result parameter to the property value and return true. Otherwise, return false.

Return mdic_PropertyHolder.TryGetValue(name, result)

End Function

Public Overrides Function TrySetMember(ByVal binder As System.Dynamic.SetMemberBinder, ByVal value As Object) As Boolean

' Converting the property name to lowercase so that property names become case-insensitive.

mdic_PropertyHolder(binder.Name.ToLower()) = value

' You can always add a value to a dictionary, so this method always returns true.

Return True

End Function

End Class

In a asp.net page we have:

<telerik:RadGrid ID="RadGrid1" runat="server" AllowPaging="True" GridLines="None" Width="100%" ShowGroupPanel="True" AllowSorting="True" ShowStatusBar="true">

<MasterTableView RetrieveAllDataFields="true" AutoGenerateColumns="false">

<Columns>

<telerik:GridTemplateColumn HeaderText="Hopa" >

<ItemTemplate>

<span style="white-space:nowrap"><%# Container.DataItem.firstname%></span>

</ItemTemplate>

</telerik:GridTemplateColumn>

<telerik:GridBoundColumn HeaderText="FirstName" DataField="FirstName">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="MiddleName" DataField="MiddleName">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="LastName" HeaderText="LastName">

</telerik:GridBoundColumn>

</Columns>

</MasterTableView>

</telerik:RadGrid>

In a asp.net page code we have:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

Dim person As Object

Dim List As New ArrayList

' Adding new dynamic properties.

' The TrySetMember method is called.

person = New DynamicDictionary()

person.FirstName = "Ellen"

person.LastName = "Adams"

List.Add(person)

person = New DynamicDictionary()

person.FirstName = "Piet"

person.LastName = "Pietersen"

List.Add(person)

person = New DynamicDictionary()

person.FirstName = "Erik"

person.MiddleName = "van der"

person.LastName = "Heide"

List.Add(person)

person = New DynamicDictionary()

person.FirstName = "Jan"

person.LastName = "Janssen"

List.Add(person)

RadGrid1.DataSource = List

RadGrid1.DataBind()

End Sub

Private Sub RadGrid1_ItemDataBound(sender As Object, e As Telerik.Web.UI.GridItemEventArgs) Handles RadGrid1.ItemDataBound

If TypeOf e.Item Is GridDataItem Then

Dim dataBoundItem As GridDataItem = e.Item

For Each Member As String In dataBoundItem.DataItem.GetMembers

Try

dataBoundItem(Member).Text = dataBoundItem.DataItem.Item(Member)

Catch ex As Exception

' Oops

End Try

Next

End If

End Sub

This is of course not verry fast, but verry flexible it is. Editing is an issue I think, but displaying is not.

Regards,

Erik

Grid

answered on 05 Mar 2019

5 answers

773 views

$find return null after PostBack

Hi,

I have a page where I user a RadWindowManager and buttons calling postback functions.
To open my RadWindow, I use this traditional code :

var oWnd = $find("<%= RadWindow.ClientID %>");
oWnd.show();

It work fine until one button is fired and postback is done.
After that postback, $find return null every time.

Does someone have a tips to resolve that issue ?

Thanks,
Corentin

Window

answered on 05 Mar 2019

20 answers

980 views

MultiColumn Headers and export to Excel

I implemented MultiColumn Headers on my radGrid, very cool!

Exporting to Excel however is not doing so great. It only takes the lowest level headers, but with column span of the top level, causing all sorts of wierdness....

Any suggestions on how to export the grid as is, meaning all levels of the headers and data?

Grid

answered on 05 Mar 2019

7 answers

668 views

Remove RadListItem from Code Behind

I have two RadListBoxes I am able to drag and drop items between the two without problems, but I have one specific RadlistItem that when I add it to the other listbox I want to remove the existing list items in the code behind, but so far it keeps giving and error like Outside Index or something similar when I try to remove those list Items. Any help or Ideas would be appreciated.

Thanks,

ListBox

answered on 05 Mar 2019

4 answers

368 views

conditional Alternating Item Style

hi,

just like james in this thread, I need to mark certain rows according to a condition.
every time the user opens and watch an idea, the row of the watched idea should be in lightblue.
that for itself works great.
My problem is, that when I click a row it gets lightblue, but then- when I click another row, the previous row change color to white.
How can I keep the condition working for alternating item style too?

that my code :

<telerik:RadGrid Skin="innovation" EnableEmbeddedSkins="false" ID="RadGrid1"

dir="rtl" HeaderStyle-ForeColor="White" AllowFilteringByColumn="True"

AllowSorting="True" AllowPaging="True" BorderColor="#74ABAE" BackColor="White"

BorderWidth="2px" runat="server" HeaderStyle-Font-Size="Small" ItemStyle-Font-Size="Small"

AlternatingItemStyle-Font-Size="Small" ItemStyle-BackColor="White" ItemStyle-ForeColor="Black"

PageSize="7" AutoGenerateColumns="False" PagerStyle-Font-Size="Small"

AlternatingItemStyle-ForeColor="Black"

Culture="Hebrew" GridLines="Vertical" Width="666px"

style="margin-right: 30px">

<HeaderContextMenu CssClass="GridContextMenu GridContextMenu_Black">

</HeaderContextMenu>

<ItemStyle BackColor="White" Font-Size="Small" ForeColor="Black" />

<PagerStyle mode="NumericPages" ShowPagerText="false"></PagerStyle>

<MasterTableView>

<CommandItemSettings ExportToPdfText="Export to Pdf"></CommandItemSettings>

<Columns>

<telerik:GridBoundColumn CurrentFilterFunction="Contains"

DataField="IDEA_CODE" UniqueName="IDEA_CODE" HeaderText="ideanum"

AutoPostBackOnFilter="true" DataType="System.Int32">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn UniqueName="LINK" DataField="LINK" HeaderText=""

DataType="System.String" Display="false">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="ROWNUM" HeaderText="#" Visible="false"

AutoPostBackOnFilter="true" CurrentFilterFunction="Contains"

DataType="System.Int32">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="SENDER_ID" HeaderText="id"

UniqueName="SENDER_ID" AutoPostBackOnFilter="true" CurrentFilterFunction="Contains"

DataType="System.String">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="FULLNAME" HeaderText="namef"

AutoPostBackOnFilter="true" CurrentFilterFunction="Contains"

DataType="System.String">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="SUBJECT" HeaderText="sub"

AutoPostBackOnFilter="true" CurrentFilterFunction="Contains"

DataType="System.String">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="DESCRIPTION" HeaderText="status"

AutoPostBackOnFilter="true" CurrentFilterFunction="Contains"

DataType="System.String">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="SEND_DATE" HeaderText="sdate"

AutoPostBackOnFilter="true" CurrentFilterFunction="Contains"

DataType="System.DateTime" DataFormatString="{0:dd/MM/yy}">

</telerik:GridBoundColumn>

<telerik:GridImageColumn HeaderText="comments" UniqueName="FBIMG">

</telerik:GridImageColumn>

</Columns>

<RowIndicatorColumn FilterControlAltText="Filter RowIndicator column">

<HeaderStyle Width="20px">

</HeaderStyle>

</RowIndicatorColumn>

<ExpandCollapseColumn FilterControlAltText="Filter ExpandColumn column">

<HeaderStyle Width="20px"></HeaderStyle>

</ExpandCollapseColumn>

<EditFormSettings>

<EditColumn FilterControlAltText="Filter EditCommandColumn column"></EditColumn>

</EditFormSettings>

</MasterTableView>

<SelectedItemStyle BackColor="LightBlue" />

<HeaderStyle ForeColor="White"></HeaderStyle>

<ClientSettings>

<Selecting AllowRowSelect="true" />

<ClientEvents OnRowSelected="OpenIdea" />

</ClientSettings>

<FilterMenu EnableImageSprites="False"></FilterMenu>

</telerik:RadGrid>

Protected Sub RadGrid1_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Handles RadGrid1.ItemDataBound

Try

If TypeOf e.Item Is GridDataItem Then

Dim item As GridDataItem = CType(e.Item, GridDataItem)

Dim idea_code As Integer = CInt(item("IDEA_CODE").Text)

If (StoredProcedures.Is_Watched_Idea(idea_code, userID) = True) Then 'if the ideas was watched then

item.BackColor = Drawing.Color.LightBlue 'color the row

End If

….

End sub

by the way- I tried disable alternating row in client settings but all I got is a transparent back color for the alternative rows.

can anyone help with that?
kind regards, Dana

Grid

answered on 05 Mar 2019

3 answers

326 views

Hide/disable node

How can I disable RadDropDownTree node based on nodeid?

I want to disable the first and second node in the tree based on the database nodeid 1 and 2

DropDownTree

answered on 04 Mar 2019

4 answers

592 views

RadGrid / GridTableView ItemCommand not firing

I have a RadGrid that contains a GridTableView in the DetailTables, as such:

<telerik:RadGrid ID="RelatedProductsGrid" runat="server" Width="95%" ShowStatusBar="true"

AutoGenerateColumns="False" PageSize="20" AllowSorting="False" AllowMultiRowSelection="False"

AllowPaging="True">

<pagerstyle mode="NextPrevAndNumeric"></pagerstyle>

<mastertableview width="100%" datakeynames="PartId" allowmulticolumnsorting="False">

<DetailTables>

<telerik:GridTableView DataKeyNames="PartId" Name="RelatedProducts" Width="100%">

<Columns>

...

<telerik:GridTemplateColumn HeaderStyle-HorizontalAlign="Right" ItemStyle-HorizontalAlign="Right">

<ItemTemplate>

<telerik:RadButton ID="RemoveRelatedProductButton" runat="server" CommandName="Delete">

</telerik:RadButton>

</ItemTemplate>

</telerik:GridTemplateColumn>

</Columns>

</telerik:GridTableView>

</DetailTables>

So, the above button, "RemoveRelatedProductButton" shows up allright, but whenever I press it - nothing happens.

I have this in the code behind:

_relatedProductsGrid = FindControl("RelatedProductsGrid") as RadGrid;
_relatedProductsGrid.ItemCommand += RelatedProductsGrid_ItemCommand;

And finally:

protected void RelatedProductsGrid_ItemCommand(object source, Telerik.Web.UI.GridCommandEventArgs e)
{
if (e.CommandName == "Delete")

etc.

However, this method never fires. What do I need to do?

Grid