Doubt regarding fetching the textbox value from grid view

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In my code there is a textbox and another label commission,the commission will be directly bind from the database and the textbox is to assign a new commisiion ,now i have to check that textbox value which has been entered dynamically by the user,if the entered value is greater than the value (i.e in tha label"commission") it should promt an error msg that" please enter the value less than the commission

and I am using javascript also to retrieve the textbox values ..but the textbox value is returning as null

What I have tried:

<asp:GridView ID="gvOprList" runat="server" AutoGenerateColumns="False" CssClass="table table-hover table-bordered" OnRowDataBound="gvOprList_RowDataBound">

protected void gvOprList_RowDataBound(object sender, GridViewRowEventArgs e)
{
foreach (GridViewRow gr in gvOprList.Rows)
{
TextBox txtCommission = gr.FindControl("txtNewCommission") as TextBox;
Label lblCommission = gr.FindControl("lblOprCommission") as Label;
txtCommission.Attributes.Add("onkeyPress", "javascript:Calculation(" + e.Row.RowIndex + ",' " + (txtCommission.ClientID) + " ',' " + (lblCommission.Text) + " ')");
}
}

Posted 20-Sep-16 1:16am

Member 12749751

Updated 20-Sep-16 6:33am

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Karthik_Mahalingam 20-Sep-16 9:47am

use onkeyup event

1 solution

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Vincent Maverick Durano · Accepted Answer · 2016-09-20T06:33:00

I would suggest you to handle it at client-side instead. You could easily do that with jQuery. Here's a quick example:

HTML:

<asp:GridView ID="gv1" runat="server" AutoGenerateColumns="False">
        <Columns>
            <asp:TemplateField>
                <ItemTemplate>
                    <asp:TextBox ID="txtCommission" placeholder="Enter value" runat="server" CssClass="txtField" />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField>
                <ItemTemplate>
                    <asp:Label ID="lblCommission" runat="server" CssClass="lblField" Text='<%# Bind("Commission") %>' />
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>

jQuery Reference:

<script src="https://code.jquery.com/jquery-3.1.0.slim.min.js" integrity="sha256-cRpWjoSOw5KcyIOaZNo4i6fZ9tKPhYYb6i5T9RSVJG8=" crossorigin="anonymous"></script>

JavaScript:

$(function () {
            $(".txtField").keyup(checkValue);

            function checkValue() {
                // loop through the rows
                $(".txtField").each(function () {
                    // get the values from this row:
                    var $val1 = parseInt($(this).val()) || 0;
                    var $val2 = parseInt($(this).parent().parent().find(".lblField").text()) || 0;

                    if ($val1 > $val2) {
                        alert("Please enter a value less than the commission");
                        $(this).focus();
                        return false;
                    }
                    
                });
            }
        });

CODE BEHIND:

using System;
using System.Collections.Generic;

namespace WebFormsDemo
{
    public class Item
    {
        public string Name { get; set; }
        public int Commission { get; set; }
    }
    public partial class JavaScript : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                List<Item> item = new List<Item>();
                item.Add(new Item { Name = "Item1", Commission = 100 });
                item.Add(new Item { Name = "Item2", Commission = 200 });
                item.Add(new Item { Name = "Item3", Commission = 300 });
                item.Add(new Item { Name = "Item4", Commission = 400 });
                item.Add(new Item { Name = "Item5", Commission = 500 });

                gv1.DataSource = item;
                gv1.DataBind();

            }
        }
    }
}

That should work based on your requirements.