By default Edit Dialog places the edit fields vertically, one at a line and in the order columns are defined in the grid. Sometimes we may need to change that. The properties that control this behaviour are available for each JQColumn, example:

<trirand:JQGridColumn DataField="CompanyName" Editable="true"
EditDialogColumnPosition="1" EditDialogRowPosition="1"
EditDialogLabel="Enter Company Name:" EditDialogFieldSuffix="(required)"/>


EditDialogColumnPosition - defines the column position of the field edit control
EditDialogRowPosition - defines the row position of the field edit control

Note that you can have several edit controls on the same line, just make sure they have the same EditDialogRowPosition, but different EditDialogColumnPosition.

EditDialogLabel - the label to display for editing. If not set, the column DataField (column name) is used
EditDialogFieldPreffix - what to display before the edit control
EditDialogFieldSuffix - what to display after the edit control
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="default.aspx.cs" Inherits="JQSuiteASPNETExample.examples.editing_data.edit_dialog_custom._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 - edit dialog with custom edit fields layout</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%; }    
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div>
       
       <trirand:JQGrid ID="JQGrid1" runat="server" Width="600px"  OnRowEditing="JQGrid1_RowEditing">         
            <Columns>
                <trirand:JQGridColumn DataField="CustomerID" Editable="false" PrimaryKey="true" />
                <trirand:JQGridColumn DataField="CompanyName" Editable="true"
                                         EditDialogColumnPosition="1" EditDialogRowPosition="1"
                                         EditDialogLabel="Enter Company Name:" EditDialogFieldSuffix="(required)"/>
                <trirand:JQGridColumn DataField="Phone" Editable="true" 
                                        EditDialogColumnPosition="1" EditDialogRowPosition="2"/>
                <trirand:JQGridColumn DataField="PostalCode" Editable="true" 
                                        EditDialogColumnPosition="2" EditDialogRowPosition="1"
                                        EditDialogLabel="Postal Code"  />
                <trirand:JQGridColumn DataField="City" Editable="true" 
                                        EditDialogColumnPosition="2" EditDialogRowPosition="2" />                
            </Columns>
            <ToolBarSettings ShowEditButton="true" />
            <EditDialogSettings CloseAfterEditing="true" Caption="Edit the selected row" Width="600" Height="220" />                        
       </trirand:JQGrid>
       
       <br /><br />
       <trirand:codetabs runat="server" id="DataTableCodeTabs"></trirand:codetabs>           
       
       
    </div>
    </form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;
using Trirand.Web.UI.WebControls;

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

        protected void JQGrid1_RowEditing(object sender, Trirand.Web.UI.WebControls.JQGridRowEditEventArgs e)
        {
            DataTable dt = GetData();
            dt.PrimaryKey = new DataColumn[] { dt.Columns["CustomerID"] };
            DataRow rowEdited = dt.Rows.Find(e.RowKey);

            rowEdited["CompanyName"] = e.RowData["CompanyName"];
            rowEdited["Phone"] = e.RowData["Phone"];
            rowEdited["PostalCode"] = e.RowData["PostalCode"];
            rowEdited["City"] = e.RowData["City"];

            JQGrid1.DataSource = GetData();
            JQGrid1.DataBind();
        }

        protected DataTable GetData()
        {
            if (Session["EditDialogData"] == null)
            {
                // Create a new Sql Connection and set connection string accordingly
                SqlConnection sqlConnection = new SqlConnection();
                sqlConnection.ConnectionString = ConfigurationManager.ConnectionStrings["SQL2008_661086_trirandEntities"].ConnectionString;
                sqlConnection.Open();

                string sqlStatement = "SELECT CustomerID, CompanyName, Phone, PostalCode, City FROM Customers";

                // Create a SqlDataAdapter to get the results as DataTable
                SqlDataAdapter sqlDataAdapter = new SqlDataAdapter(sqlStatement, sqlConnection);

                // Create a new DataTable
                DataTable dtResult = new DataTable();

                // Fill the DataTable with the result of the SQL statement
                sqlDataAdapter.Fill(dtResult);

                Session["EditDialogData"] = dtResult;

                return dtResult;
            }
            else
            {
                return Session["EditDialogData"] as DataTable;
            }
        }  
    }
}
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" />