jqGrid supports various rules for client-side validation. They are available through the EditClientSideValidators collection for each column. Since this is a collection, you can stack several validation rules at once - they will all apply to the edit field.

For details, please take a look at the ASPX tab.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="default.aspx.cs" Inherits="JQSuiteASPNETExample.examples.editing_data.clientside_validation._default" %>
<%@ Register Assembly="Trirand.Web" TagPrefix="trirand" Namespace="Trirand.Web.UI.WebControls" %>

<!DOCTYPE html>
<html lang="en-us">
<head id="Head1" runat="server">
    <meta charset="utf-8">
    <title>jqGrid for ASP.NET WebForms - client-side validation</title>
    <!-- The jQuery UI theme that will be used by the grid -->
    <link rel="stylesheet" type="text/css" media="screen" href="http://code.jquery.com/ui/1.12.1/themes/redmond/jquery-ui.css" />
    <!-- The jQuery UI theme extension jqGrid needs -->
    <link rel="stylesheet" type="text/css" media="screen" href="/themes/ui.jqgrid.css" />
    <!-- jQuery runtime minified -->
    <script src="/js/jquery-3.2.1.min.js" type="text/javascript"></script>
    <!-- The localization file we need, English in this case -->
    <script src="/js/trirand/i18n/grid.locale-en.js" type="text/javascript"></script>
    <!-- The jqGrid client-side javascript -->
    <script src="/js/trirand/jquery.jqGrid.min.js" type="text/javascript"></script>    
    <style type="text/css">
        body, html { font-size: 80%; }    
    <form id="form1" runat="server">
        <script type="text/javascript">

            function validatePositive(value, column) {
                if (value < 0 )
                    return [false, "Please enter a positive value"];
                    return [true, ""];
       <trirand:JQGrid ID="JQGrid1" runat="server" Width="600px">         
                <trirand:JQGridColumn DataField="Integer" Editable="true">
                        <trirand:RequiredValidator />                        
                        <trirand:CustomValidator ValidationFunction="validatePositive" />
                <trirand:JQGridColumn DataField="Number" Editable="true">
                        <trirand:RequiredValidator />               
                        <trirand:MinValueValidator MinValue="1000" />
                        <trirand:MaxValueValidator MaxValue="10000" />   
                        <trirand:CustomValidator ValidationFunction="validatePositive" />
                <trirand:JQGridColumn DataField="Email" Editable="true">
                        <trirand:RequiredValidator />           
                        <trirand:EmailValidator />
                <trirand:JQGridColumn DataField="Url" Editable="true">
                        <trirand:RequiredValidator />                       
                        <trirand:UrlValidator />
            <ToolBarSettings ShowEditButton="true" />
            <EditDialogSettings CloseAfterEditing="true" Caption="Edit the selected row" />                        
       <br /><br />
       <trirand:codetabs runat="server" id="DataTableCodeTabs"></trirand:codetabs>       
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using Trirand.Web.UI.WebControls;

namespace JQSuiteASPNETExample.examples.editing_data.clientside_validation
    public partial class _default : System.Web.UI.Page
        protected void Page_Load(object sender, EventArgs e)
            if (JQGrid1.AjaxCallBackMode == AjaxCallBackMode.RequestData)
                JQGrid1.DataSource = GetData();

        private DataTable GetData()
            DataTable dt = new DataTable();
            dt.Columns.Add(new DataColumn("Integer", typeof(int)));
            dt.Columns.Add(new DataColumn("Number", typeof(decimal)));
            dt.Columns.Add(new DataColumn("Email", typeof(string)));
            dt.Columns.Add(new DataColumn("Url", typeof(string)));            

            dt.Rows.Add(new object[] { "200000", "600000.34", "john.smith@yahoo.com", "http://www.yahoo.com" });
            dt.Rows.Add(new object[] { "1600000", "7522100.21", "joe.woe@google.com", "http://www.google.com" });
            dt.Rows.Add(new object[] { "430150", "6644060", "julia.bergman@bing.com", "http://www.bing.com" });
            dt.Rows.Add(new object[] { "125330", "20040.99", "roy.corner@msn.com", "http://www.msn.com" });

            return dt;
Switch theme:

Theming is based on the very popular jQuery ThemeRoller standard. This is the same theming mechanism used by jQuery UI and is now a de-facto standard for jQuery based components. The benefits of using ThemeRoller are huge. We can offer a big set of ready to use themes created by professional designers, including Windows-like themes (Redmond), Apple-like theme (Cupertino), etc. In addition to that any jQuery UI controls on the same page will pick the same theme.

Last, but not least, you can always roll your own ThemeRoller theme, using the superb Theme Editor

To use a theme, simply reference 2 Css files in your Html <head> section - the ThemeRoller theme you wish to use, and the jqGrid own ThemeRoller Css file. For example (Redmond theme):

<link rel="stylesheet" type="text/css" media="screen" href="/themes/redmond/jquery-ui-1.8.2.custom.css" />
<link rel="stylesheet" type="text/css" media="screen" href="/themes/ui.jqgrid.css" />