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unable to get new values from rad grid on update

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Grid

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

Mubasshar asked on 04 Jul 2011, 02:16 PM

Dear Team

i tried almost all the ways which i could find on internet but still unable to get the updated values from bound grid column.

plz check out my code lines.

aspx coding

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="frmViewUnitMaster.aspx.vb" Inherits="iTourism.WebForm1" %>

<%@ 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 runat="server">

<title></title>

</head>

<body>

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

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

</telerik:RadScriptManager>

<div>

<table style="width:100%;">

<tr>

<td>

</td>

<td>

<asp:Button ID="btnAdd" runat="server" Text="Add" Width="69px" />

<asp:Label ID="lblMessage" runat="server" Text="Label"></asp:Label>

</td>

<td>

</td>

</tr>

<tr>

<td>

</td>

<td>

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

<AjaxSettings>

<telerik:AjaxSetting AjaxControlID="UMGrid">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="UMGrid" />

</UpdatedControls>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

<telerik:RadGrid ID="UMGrid" runat="server" AutoGenerateColumns="False" GridLines="None"

AllowFilteringByColumn="True" AllowSorting="True" AutoGenerateEditColumn="True"

AllowPaging="True" Width="60%" ViewStateMode="Enabled" CellPadding="10"

CellSpacing="10" onupdatecommand="UMGrid_UpdateCommand" >

<ClientSettings>

<Selecting AllowRowSelect="True" />

<Scrolling AllowScroll="True" />

<Selecting AllowRowSelect="True"></Selecting>

</ClientSettings>

<MasterTableView EditMode="EditForms" DataKeyNames="UnitCode">

<Columns>

<telerik:GridBoundColumn DefaultInsertValue="" UniqueName="UnitCode"

HeaderText="UnitCode" DataField="UnitCode" ReadOnly="True">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DefaultInsertValue="" UniqueName="UnitDesc"

HeaderText ="Unit Description" DataField="Description" >

</telerik:GridBoundColumn>

</Columns>

<EditFormSettings EditFormType="AutoGenerated" >

</EditFormSettings>

</MasterTableView>

</telerik:RadGrid>

</td>

<td>

</td>

</tr>

</table>

</div>

</form>

</body>

</html>

Vb Code

Imports System

Imports System.Data

Imports Telerik.Web.UI

Imports System.Data.SqlClient

Public Class WebForm1

Inherits System.Web.UI.Page

Dim objclsUnitMaster As New clsUnitMaster

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

UMGrid.AutoGenerateDeleteColumn = True

UMGrid.AutoGenerateEditColumn = True

UMGrid.DataSource = (objclsUnitMaster.GetUnitCodeList).Tables("UnitMaster")

UMGrid.DataBind()

End Sub

Protected Sub btnAdd_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnAdd.Click

Response.Redirect("frmUnitMaster.aspx")

End Sub

Private Sub UMGrid_ItemCommand(ByVal source As Object, ByVal e As Telerik.Web.UI.GridCommandEventArgs) Handles UMGrid.ItemCommand

If (e.CommandName = RadGrid.UpdateCommandName) Then

Dim editedItem As GridEditableItem = CType(e.Item, GridEditableItem)

Dim newValues As New Hashtable

e.Item.OwnerTableView.ExtractValuesFromItem(newValues, editedItem)

'not getting the updated value

lblMessage.Text = newValues("Description").ToString

End If

End Sub

Private Sub UMGrid_NeedDataSource(ByVal source As Object, ByVal e As Telerik.Web.UI.GridNeedDataSourceEventArgs) Handles UMGrid.NeedDataSource

UMGrid.DataSource = (objclsUnitMaster.GetUnitCodeList).Tables("UnitMaster")

UMGrid.DataBind()

End Sub

Public Sub UMGrid_UpdateCommand(ByVal source As Object, ByVal e As Telerik.Web.UI.GridCommandEventArgs) Handles UMGrid.UpdateCommand

' Dim editedItem As GridEditableItem = CType(e.Item, GridEditableItem)

'Dim MyUserControl As UserControl = CType(e.Item.FindControl(GridEditFormItem.EditFormUserControlID), UserControl)

Dim _UnitCode As Integer = 0

Dim _Description As String = ""

Dim _Result As Long = 0

Dim _item As GridEditableItem

_item = e.Item

Try

_UnitCode = Convert.ToInt32(DirectCast(_item("UnitCode").Controls(0), TextBox).Text)

'Unable to Get Updated Value using this also

_Description = DirectCast(_item("Description").Controls(0), TextBox).Text

_Result = objclsUnitMaster.UpdateUnitByCode(_UnitCode, _Description)

If _Result = 0 Then

lblMessage.Text = "Record Saved Successfully"

Else

lblMessage.Text = "Error While Saving Record" & " - " & _Result

End If

'UMGrid.Rebind()

Catch ex As Exception

lblMessage.Text = ex.Message

End Try

End Sub

End Class

3 Answers, 1 is accepted

answered on 04 Jul 2011, 03:13 PM

Hello Mubasshar,

The issue is cause you are binding the RadGrid in the pageLoad with out checking for the !Page.IsPostBack. So the it always returns the old values. The correct approach when using simple data-binding is to call the DataBind() method on the first page load when !Page.IsPostBack and after handling some event (sort event for exampleSimple data-binding through the DataBind() method can be used in simple scenarios which does not require complex operations like insert/delete/update, grouping, hierarchy relations, etc.

And also no need to use simple dataBinding and NeedData source together. You can find more on this from the following documentation.
Grid / Simple Data Binding.
Grid / Advanced Data Binding.

Thanks,
Princy.

answered on 05 Jul 2011, 03:00 PM

thanks dear its working now.
the other issue is that i am using the form template for updating the record. i am using asp buttons. update button is working in fire fox but not working in Internet Explorer. is something i have to change for Internet Explorer.

<FormTemplate>

<table>

<tr>

<td>Description</td>

<td><asp:TextBox ID="txtDescription" MaxLength="50" runat="server" text='<%# Bind ("Description") %>' ToolTip="Enter Description" ></asp:TextBox>

<asp:RequiredFieldValidator ID="RequiredFieldValidatorDesc" runat="server" ControlToValidate="txtDescription" ErrorMessage="Description Is Required" ForeColor="Red" ></asp:RequiredFieldValidator></td>

</tr>

<tr

>

'These buttons are not working for Internet Explorer

<td> <asp:Button ID="btnUpdate" CommandName="Update" Text="Update" runat="server" /> </td>

<td> <asp:Button ID="btnCancel" CommandName="Cancel" Text="Cancel" runat="server" /> </td>

</tr>

</table>

</FormTemplate>