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What am I doing wrong here????

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Grid

This is a migrated thread and some comments may be shown as answers.

Kim asked on 22 Mar 2012, 04:47 AM

I have a simple grid bound to a List of objects.

I have a command button that calls a javascript function which executes an ajax request. In that request I add a new item to the list and rebind my grid. The new item flashes in the grid for a moment then dissappears, leaving only the original item. I am new to telerik but this seem so basic. I must be missing something or not sure how to do this. See code below.

Default.aspx

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="bug._Default" %>

<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

<!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 id="Head1" runat="server">

<title></title>

<telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">

<script type="text/javascript" id="telerikClientEvents1">

function RadButton1_Clicked(sender, args) {

$find("<%= RadAjaxManager1.ClientID %>").ajaxRequest("Rebind");

}

</script>

</telerik:RadCodeBlock>

</head>

<body>

<form id="form1" runat="server">

<telerik:RadScriptManager ID="RadScriptManager1" runat="server"/>

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" OnAjaxRequest="RadAjaxManager1_AjaxRequest">

<AjaxSettings>

<telerik:AjaxSetting AjaxControlID="RadAjaxManager1">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="grdVoucherTypes" />

</UpdatedControls>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

<table width="600px" style="margin: 0px auto">

<tr><td style="text-align: center">

<telerik:RadButton ID="RadButton1" runat="server" onclientclicked="RadButton1_Clicked" Text="CLick me to add new item" >

</telerik:RadButton>

</td>

</tr>

<tr>

<td>

<telerik:RadGrid ID="grdVoucherTypes" runat="server" AutoGenerateColumns="False" CellSpacing="0" Width="59%" style="margin-top:10px; margin-left: auto; margin-right: auto; margin-bottom: 0px;" AllowPaging="True" AllowSorting="True" GridLines="None" PageSize="20" >

<MasterTableView ClientDataKeyNames="VoucherTypeID">

<Columns>

<telerik:GridBoundColumn HeaderText="ID" DataField="VoucherTypeID" UniqueName="VoucherTypeID" Visible="False" DataType="System.Int32" ReadOnly="True"/>

<telerik:GridBoundColumn HeaderText="Description" DataField="VoucherTypeDesc" UniqueName="VoucherTypeDesc">

<ItemStyle HorizontalAlign="Left"/>

<HeaderStyle Width="200px"></HeaderStyle>

</telerik:GridBoundColumn>

</Columns>

</MasterTableView>

</telerik:RadGrid>

</td>

</tr>

</table>

</form>

</body>

</html>

Default.aspx.vb

Public Class _Default

Inherits System.Web.UI.Page

Public Property MyList() As List(Of VoucherType)

Get

Return Session("MyList")

End Get

Set(value As List(Of VoucherType))

Session("MyList") = value

End Set

End Property

Sub RadAjaxManager1_AjaxRequest(sender As Object, e As Telerik.Web.UI.AjaxRequestEventArgs)

Dim x As New VoucherType

x.VoucherTypeID = 10

MyList.Add(x)

grdVoucherTypes.Rebind()

End Sub

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

Dim x As New List(Of VoucherType)

Dim y = New VoucherType

y.VoucherTypeID = 1

x.Add(y)

MyList = x

'grdVoucherTypes.DataSource = MyList

End Sub

Private Sub grdVoucherTypes_NeedDataSource(sender As Object, e As Telerik.Web.UI.GridNeedDataSourceEventArgs) Handles grdVoucherTypes.NeedDataSource

grdVoucherTypes.DataSource = MyList

End Sub

End Class

Public Class VoucherType

Private m_VoucherTypeID As Long

Private m_VoucherTypeDescription As String

Private m_Value As Long

Public IsNew As Boolean

Public Property Value As Long

Get

Return m_Value

End Get

Set(value As Long)

m_Value = value

End Set

End Property

Public Property VoucherTypeID As Long

Get

Return m_VoucherTypeID

End Get

Set(value As Long)

m_VoucherTypeID = value

End Set

End Property

Public ReadOnly Property Available As Long

Get

Return 0

End Get

End Property

Public ReadOnly Property Active As Long

Get

Return 0

End Get

End Property

Public ReadOnly Property Expired As Long

Get

Return Available - Active

End Get

End Property

Public Property VoucherTypeDescription As String

Get

Return m_VoucherTypeDescription

End Get

Set(value As String)

m_VoucherTypeDescription = value

End Set

End Property

Public ReadOnly Property VoucherTypeDesc As String

Get

Dim str As String

str = Value

Return "Test voucher"

End Get

End Property

End Class

What am I doing wrong here????

2 Answers, 1 is accepted