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RadGrid Custom Filter OnTextChanged event got triggered twice

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Grid

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

Don asked on 28 Aug 2015, 06:40 PM

Hi There,

I am using a custom filter in my RadGrid, but when debugging I noticed that the OnTextChanged event got triggered twice. However, if I remove the AjaxSetting section, everything works fine. But I do need to config ajax settings in my application. Is there anyone to explain why this is happening? The following is the demo code. Thanks a lot.

TestCustomFilter.aspx

<%@ Page Language="C#" AutoEventWireup="true" EnableViewStateMac="false" ViewStateEncryptionMode="Never" CodeFile="TestCustomFilter.aspx.cs" Inherits="TestCustomFilter" %>

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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<html xmlns='http://www.w3.org/1999/xhtml'>

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

<title>Telerik ASP.NET Example</title>

<link rel="Stylesheet" href="../Styles/styles.css" />

</head>

<body>

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

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

<telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />

<div class="demo-container size-medium">

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

<AjaxSettings>

<telerik:AjaxSetting AjaxControlID="RadGrid1">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="RadAjaxLoadingPanel1"></telerik:AjaxUpdatedControl>

</UpdatedControls>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">

</telerik:RadAjaxLoadingPanel>

<telerik:RadGrid ID="RadGrid1" runat="server" OnNeedDataSource="RadGrid1_NeedDataSource"

GridLines="None" AllowPaging="true"

AllowSorting="true" PageSize="10" AllowFilteringByColumn="true">

<MasterTableView AutoGenerateColumns="False" CommandItemDisplay="None" CurrentResetPageIndexAction="SetPageIndexToFirst"

DataKeyNames="OrderID" Dir="LTR" Frame="Border"

TableLayout="Auto">

<Columns>

<telerik:GridBoundColumn CurrentFilterFunction="NoFilter" DataField="OrderID" Display="false"

DataType="System.Int32" FilterListOptions="VaryByDataType" ForceExtractValue="None"

HeaderText="OrderID" ReadOnly="True" SortExpression="OrderID" UniqueName="OrderID">

</telerik:GridBoundColumn>

<telerik:GridTemplateColumn UniqueName="ShipName" HeaderText="Ship Name" SortExpression="ShipName">

<FilterTemplate>

<asp:TextBox ID="TextBox1" runat="server" AutoPostBack="True" OnTextChanged="TextBox1_TextChanged"></asp:TextBox>

</FilterTemplate>

<ItemTemplate>

<asp:HyperLink ID="targetControl" runat="server" NavigateUrl="#" Text='<%# Eval("ShipName") %>'></asp:HyperLink>

</ItemTemplate>

</telerik:GridTemplateColumn>

<telerik:GridBoundColumn AllowSorting="true" DataField="ShipCountry" HeaderText="Ship Country"

SortExpression="ShipCountry" UniqueName="ShipCountry">

</telerik:GridBoundColumn>

</Columns>

<PagerStyle PageSizeControlType="RadDropDownList" ShowPagerText="false" />

</MasterTableView>

</telerik:RadGrid>

</div>

</form>

</body>

</html>

TestCustomFilter.aspx.cs

using System;

using System.Collections;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Web;

using System.Web.SessionState;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;

using System.Collections.Generic;

using Telerik.Web.UI;

using System.IO;

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

{

public class MyOrder

{

public int OrderID { get; set; }

public DateTime OrderDate { get; set; }

public double Freight { get; set; }

public string ShipName { get; set; }

public string ShipCountry { get; set; }

}

protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)

{

LoadData();

}

protected void RadGrid1_PreRender(object sender, EventArgs e)

{

LoadData();

}

private void LoadData()

{

MyOrder _order1 = new MyOrder();

_order1.OrderID = 1;

_order1.OrderDate = new DateTime(2014, 1, 18);

_order1.Freight = 15.61;

_order1.ShipCountry = "Canada";

_order1.ShipName = "David";

MyOrder _order2 = new MyOrder();

_order2.OrderID = 2;

_order2.OrderDate = new DateTime(2015, 9, 12);

_order2.Freight = 12.39;

_order2.ShipCountry = "US";

_order2.ShipName = "Jack";

MyOrder _order3 = new MyOrder();

_order3.OrderID = 3;

_order3.OrderDate = new DateTime(2015, 6, 2);

_order3.Freight = 6.81;

_order3.ShipCountry = "Mexico";

_order3.ShipName = "Howard";

MyOrder _order4 = new MyOrder();

_order4.OrderID = 4;

_order4.OrderDate = new DateTime(2014, 3, 26);

_order4.Freight = 19.92;

_order4.ShipCountry = "Canada";

_order4.ShipName = "William";

MyOrder _order5 = new MyOrder();

_order5.OrderID = 5;

_order5.OrderDate = new DateTime(2015, 5, 15);

_order5.Freight = 9.96;

_order5.ShipCountry = "US";

_order5.ShipName = "Don";

List<MyOrder> _myList = new List<MyOrder>();

_myList.Add(_order1);

_myList.Add(_order2);

_myList.Add(_order3);

_myList.Add(_order4);

_myList.Add(_order5);

RadGrid1.DataSource = _myList;

}

protected void TextBox1_TextChanged(object sender, EventArgs e)

{

TextBox TextBox1 = sender as TextBox;

GridColumn column = RadGrid1.MasterTableView.GetColumnSafe("ShipName");

column.CurrentFilterFunction = GridKnownFunction.Contains;

column.CurrentFilterValue = TextBox1.Text.Trim();

RadGrid1.Rebind();

}

4 Answers, 1 is accepted

answered on 02 Sep 2015, 01:22 PM

RadGridFilterTextBoxDon.zip

Hi Don,

I've created a sample RadGrid web site using the provided code snippets. Please run the attached application and let me know about the result.

Regards,
Eyup
Telerik

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RadGrid Custom Filter OnTextChanged event got triggered twice

4 Answers, 1 is accepted