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PageIndexChanged and PageSizeChanged fire twice

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Grid

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

jolynice asked on 02 Jan 2011, 03:45 AM

Hi everyone and happy new year to all coders.

My problem is , I have a radgrid with custom paging, (based on Grid/Pager Template) i put a linkbutton and a textbox filter to load with data the radgrid
When a write something to find in the textbox filter the radgrid it´s loaded correctly, the linkbutton it´s call one time.
When a click in the button (first, prev, next, last ) work ok to, but when I change the page size in the radcombox the RadGrid1_PageSizeChanged is called twice and if a write the number of the page in the RadNumericTextBox, the RadGrid1_PageIndexChanged it´s called one and then the LinkButton1_Click also.
Anyone can say what i am missing here?

I put here all the code.
Thank in advance.

Jolynice

ASPX

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="example.aspx.cs" Inherits="OralOffice_Pacientes_example" %>

<!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>

<telerik:RadScriptBlock ID="RadScriptBlock1" runat="server">

<script type="text/javascript">

var tableView = null;

function pageLoad(sender, args) {

tableView = $find("<%= RadGrid1.ClientID %>").get_masterTableView();

}

function RadComboBox1_SelectedIndexChanged(sender, args) {

tableView.set_pageSize(sender.get_value());

}

function changePage(argument) {

tableView.page(argument);

}

function RadNumericTextBox1_ValueChanged(sender, args) {

tableView.page(sender.get_value());

}

</script>

</telerik:RadScriptBlock>

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

<AjaxSettings>

<telerik:AjaxSetting AjaxControlID="RadGrid1">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="RadGrid1" />

</UpdatedControls>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

<div>

<asp:Button ID="LinkButton1" runat="server" Text="Find CompanyName" onclick="LinkButton1_Click">

</asp:Button>

<input type="text" runat="server" name="fname" id="Text1" style="width:370px;"/>

</div>

<telerik:RadGrid ID="RadGrid1" AllowPaging="true"

DataSourceID="SqlDataSource1" runat="server" Skin="Vista"

OnPageIndexChanged="RadGrid1_PageIndexChanged" onPagesizechanged="RadGrid1_PageSizeChanged">

<MasterTableView>

<PagerTemplate>

<asp:Panel ID="PagerPanel" Style="padding: 6px; line-height: 24px" runat="server">

<div style="float: left">

<span style="margin-right: 3px;">Page size:</span>

<telerik:RadComboBox ID="RadComboBox1" DataSource="<%# new object[]{10, 20, 30, 40, 50} %>"

Style="margin-right: 20px;" Width="40px" SelectedValue='<%# DataBinder.Eval(Container, "Paging.PageSize") %>'

runat="server" OnClientSelectedIndexChanged="RadComboBox1_SelectedIndexChanged">

</telerik:RadComboBox>

</div>

<div style="margin: 0px; float: right;">

Displaying page

<%# (int)DataBinder.Eval(Container, "Paging.CurrentPageIndex") + 1 %>

of

<%# DataBinder.Eval(Container, "Paging.PageCount")%>

, items

<%# (int)DataBinder.Eval(Container, "Paging.FirstIndexInPage") + 1 %>

to

<%# (int)DataBinder.Eval(Container, "Paging.LastIndexInPage") + 1 %>

of

<%# DataBinder.Eval(Container, "Paging.DataSourceCount")%>

</div>

<div style="width: 400px; margin: 0px; padding: 0px; float: left; margin-right: 10px;

white-space: nowrap;">

<asp:Button ID="Button1" runat="server" OnClientClick="changePage('first'); return false;"

CommandName="Page" CommandArgument="First" Text="|<" CssClass="PagerButton FirstPage" />

<asp:Button ID="Button2" runat="server" OnClientClick="changePage('prev'); return false;"

CommandName="Page" CommandArgument="Prev" Text=" <" CssClass="PagerButton PrevPage" />

<span style="vertical-align: middle;">Page:</span>

<telerik:RadNumericTextBox ID="RadNumericTextBox1" Width="25px" Value='<%# (int)DataBinder.Eval(Container, "Paging.CurrentPageIndex") + 1 %>'

runat="server">

<ClientEvents OnValueChanged="RadNumericTextBox1_ValueChanged" />

<NumberFormat DecimalDigits="0" />

</telerik:RadNumericTextBox>

<span style="vertical-align: middle;">of

<%# DataBinder.Eval(Container, "Paging.PageCount")%>

</span>

<asp:Button ID="Button3" runat="server" OnClientClick="changePage('next'); return false;"

CommandName="Page" CommandArgument="Next" Text=" >" CssClass="PagerButton NextPage" />

<asp:Button ID="Button4" runat="server" OnClientClick="changePage('last'); return false;"

CommandName="Page" CommandArgument="Last" Text=" >|" CssClass="PagerButton LastPage" />

</div>

<asp:Panel runat="server" ID="NumericPagerPlaceHolder" />

</asp:Panel>

</PagerTemplate>

<PagerStyle Mode="NumericPages" PageButtonCount="10" />

</MasterTableView>

</telerik:RadGrid>

<br />

<asp:SqlDataSource ID="SqlDataSource1" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"

ProviderName="System.Data.SqlClient"

SelectCommand="SELECT CustomerID, CompanyName, ContactName, ContactTitle, Address, City FROM Customers"

runat="server"></asp:SqlDataSource>

</div>

</form>

</body>

</html>

using System;

using System.Collections.Generic;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

public partial class OralOffice_Pacientes_example : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

setdatasourceGrid();

RadGrid1.DataBind();

}

protected void LinkButton1_Click(object sender, EventArgs e)

{

setdatasourceGrid();

RadGrid1.DataBind();

}

internal void setdatasourceGrid()

{

//To see the headers only

if (String.IsNullOrEmpty(Text1.Value))

SqlDataSource1.SelectCommand = "SELECT top 0 CustomerID, CompanyName, ContactName, ContactTitle FROM Customers ";

//To see all records

else if (Text1.Value.Equals("*"))

SqlDataSource1.SelectCommand = "SELECT CustomerID, CompanyName, ContactName, ContactTitle FROM Customers ";

//filter

else

SqlDataSource1.SelectCommand = "SELECT CustomerID, CompanyName, ContactName, ContactTitle  FROM  Customers  WHERE  (CompanyName like  '%" + Text1.Value + "%')";

}

protected void RadGrid1_PageIndexChanged(object source, Telerik.Web.UI.GridPageChangedEventArgs e)

{

RadGrid1.CurrentPageIndex = e.NewPageIndex;

setdatasourceGrid();

RadGrid1.DataBind();

}

protected void RadGrid1_PageSizeChanged(object source, Telerik.Web.UI.GridPageSizeChangedEventArgs e)

{

setdatasourceGrid();

RadGrid1.DataBind();

}

2 Answers, 1 is accepted

Accepted

answered on 07 Jan 2011, 08:27 AM

Hello jolynice,

The button by default is interpreted as a submit button for the page and that is why its click event fires when you press enter. To solve this problem set UseSubmitBehavior="false" property for the button.
Additionally the PageSizeChanged event is fired twice because the first time its raised from the MasterTableView for the grid (when setting it client side) and it bubbles up and the second time it is raised from the grid itself.

Best wishes,
Marin
the Telerik team

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