Gridview rowcommand not working

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Gridview rowcommand not working after Gridview Bind coding

if i add source using gui rowcommand working but when i bind using code rowcommand give me this error 

Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.


and if i put enableEventValidation="true" in page, rowcommand not working 

how do i make it possible ?

What I have tried:

Gridview

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm13.aspx.cs" Inherits="WebApplication3.WebForm13"  enableEventValidation="false"%>

<!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></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        
    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
        CellPadding="4" ForeColor="#333333" GridLines="None" Width="100%" 
            onrowcommand="GridView1_RowCommand">
        <AlternatingRowStyle BackColor="White" />
        <Columns>
            <asp:TemplateField AccessibleHeaderText="AID" HeaderText="AID">
            <EditItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# Eval("AID") %>'></asp:Label>
            </EditItemTemplate>
            <ItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# Bind("AID") %>'></asp:Label>
            </ItemTemplate>
            
            </asp:TemplateField>
            <asp:BoundField HeaderText="FIRST NAME" DataField= "FirstName" />
            <asp:BoundField HeaderText="LAST NAME"  DataField= "LastName"/>
            <asp:BoundField HeaderText="EMP. CODE" DataField= "EMPID" />
            <asp:BoundField HeaderText="GENDER" DataField= "GENDER" />
            <asp:BoundField HeaderText="EMAIL" DataField= "EMAILID" />
            <asp:TemplateField HeaderText="VIEW">
                <ItemTemplate>
                    <asp:Button ID="Button1" runat="server" Text="VIEW"  CommandArgument="<%#((GridViewRow) Container).RowIndex %>" CommandName="viewuser" CausesValidation="True" Height="24px" Width="20px" Font-Size="11px" BackColor="#6699FF" BorderColor="Black" BorderWidth="0.5px" />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="EDIT">
                <ItemTemplate>
                    <asp:Button ID="Button2" runat="server" Text="EDIT" CommandArgument="<%#((GridViewRow) Container).RowIndex %>" CommandName="viewuser" CausesValidation="True" Height="24px" Width="20px" Font-Size="11px" BackColor="#6699FF" BorderColor="Black" BorderWidth="0.5px" />
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
        <EditRowStyle BackColor="#2461BF" />
        <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
        <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" 
            HorizontalAlign="Left" />
        <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
        <RowStyle BackColor="#EFF3FB" />
        <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
        <SortedAscendingCellStyle BackColor="#F5F7FB" />
        <SortedAscendingHeaderStyle BackColor="#6D95E1" />
        <SortedDescendingCellStyle BackColor="#E9EBEF" />
        <SortedDescendingHeaderStyle BackColor="#4870BE" />
    </asp:GridView>
</div>
</form>





    
</body>
</html>

-------------------------------------------------------------------
Page load

protected void Page_Load(object sender, EventArgs e)
        {
            try
            {
                string cs = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;
                using (SqlConnection con = new SqlConnection(cs))
                {
                    con.Open();
                    SqlCommand cmd = new SqlCommand
                    (@"SELECT [AID],[FirstName], [LastName], [EMPID], [GENDER], [EMAILID] FROM USERSMST", con);
                    cmd.Connection = con;
                    DataTable dt = new DataTable();
                    SqlDataAdapter sda = new SqlDataAdapter(cmd);
                    sda.Fill(dt);
                    GridView1.DataSource = dt;
                    GridView1.DataBind();
                }



            }
            catch (SqlException EX)
            {
                Response.Write(EX.Message);
            }
        }

-----------------------------------------
Rowcommand

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
       if (e.CommandName == "viewuser")
           {
               Response.Redirect("userlist.aspx");
           }

Posted 14-Nov-18 21:07pm

Member 14041670

Updated 15-Nov-18 18:05pm

v6

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Comments

akshay_zz 15-Nov-18 12:01pm

Can you put your GridView1_RowCommand function code. One more thing can you put a debugger in GridView1_RowCommand in the function and can check that the debugger is getting hit or not.

Member 14041670 15-Nov-18 22:56pm

i have updated my question and code.

akshay_zz 15-Nov-18 23:30pm

Can you also show your pageload function.

Member 14041670 15-Nov-18 23:49pm

I have already put page load.
this is my name spaces.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;

namespace WebApplication3
{
public partial class WebForm13 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)

akshay_zz 15-Nov-18 23:52pm

What are you doing buddy. That's only page load definition, show the body part

Member 14041670 16-Nov-18 0:13am

its already updated in question

Vincent Maverick Durano 15-Nov-18 12:05pm

Where did you bind/populate your GridView? Show us your Page Load and RowCommand event code.

Member 14041670 15-Nov-18 22:58pm

i have updated my question.

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Bryian Tan · Accepted Answer · 2018-11-15T18:00:00

Look like the button click is causing a Postback, based on the code, the Page_Load method will get data from the database and rebind the Grid each time a PostBack occur.

On Page_Load method, update the code to wrap the logic inside the !IsPostBack

C#

if (!IsPostBack)
{
   try  {
       ....
   }
}

This thread explained the situation.
GridView Along With Page Index Changing and Button Inside | The ASP.NET Forums[^]

akshay_zz · Accepted Answer · 2018-11-15T18:06:00

I think you are missing ispostback check in pageload. ispostback check whether is page is loading first time or it just a postback from a control.

C#

protected void Page_Load(object sender, EventArgs e)
{
  if(!Page.IsPostBack)
  {
   //Control Initialization
   //Databinding
   bind_grid()
  }
}

private void bind_grid()
{
  // Bind your grid here
}

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
       if (e.CommandName == "viewuser")
           {
               Response.Redirect("userlist.aspx");
           }
}

I think this should work for you. If it helps please mark this as answer.

Gridview rowcommand not working

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