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Tuesday, 30 December 2014

Bind and Validate GridView TextBox Value by RequiredFieldValidator In Asp.Net Using C#

12/30/2014 - By Pranav Singh 0



This article will show you how you can validate gridview textbox value by requiredfieldvalidator in asp.net using c#.net.


 So for this article first we will create a new asp.net application and add the gridview. After adding all the controls your .aspx page will look as shown below.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %>

<!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>Bind and Validate GridView TextBox Value by RequiredFieldValidator In Asp.Net Using C#
    </title>
</head>
<body>
    <form id="form1" runat="server">
    <table width="100%" cellpadding="4" cellspacing="4">
        <tr>
            <td align="center">
                <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Save" Width="89px" />
            </td>
        </tr>
        <tr>
            <td align="center">
                <asp:Label ID="lblmessage" runat="server"></asp:Label>
            </td>
        </tr>
        <tr>
            <td align="left">
                <asp:GridView ID="GridView1" runat="server" Width="100%" AutoGenerateColumns="False">
                    <Columns>
                        <asp:BoundField DataField="Name" HeaderText="Name" />
                        <asp:BoundField DataField="Address" HeaderText="Address" />
                        <asp:BoundField DataField="UserType" HeaderText="UserType" />
                        <asp:TemplateField>
                            <HeaderTemplate>
                                Percentage
                            </HeaderTemplate>
                            <ItemTemplate>
                                <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                                <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="TextBox1"
                                    ErrorMessage="*" ForeColor="Red"></asp:RequiredFieldValidator>
                            </ItemTemplate>
                        </asp:TemplateField>
                    </Columns>
                </asp:GridView>
            </td>
        </tr>
    </table>
    </form>
</body>
</html>

In above code please check the item template. In this I have added RequiredFieldValidator and textbox. Now when you click on button you will get the error message as astirc.

Now add the below code into the into your .cs page to bind the gridview with sql server database table.

using System;
using System.Data.SqlClient;
using System.Data;
namespace WebApplication1
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                BindGridView();
            }
        }
        private void BindGridView()
        {
            SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.
ConnectionStrings["con"].ToString());
            try
            {
                DataTable objdt = new DataTable();
                string query = "select * from UserDetail;";
                SqlDataAdapter da = new SqlDataAdapter(query, con);
                con.Open();
                da.Fill(objdt);
                con.Close();
                if (objdt.Rows.Count > 0)
                {
                    GridView1.DataSource = objdt;
                    GridView1.DataBind();
                }
            }
            catch
            {
                con.Close();
            }
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            lblmessage.Text = "Thanks for providing values.";
        }    
    }
}

Now we have done run the application and check the output.



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