asp.net gridview data insert two times how to avoid repeate

Question

asp.net gridview data insert two times how to avoid repeate

RAVI 1,076

Hello

This is my gridview data on button click i have foreach insert query

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most of them time it insert only one time but sometime it insert like this how to avoid duplicate insert

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Anonymous

2024-11-20T05:37:19.95+00:00

May i know which application you are using and sample code you are using for insert.
SurferOnWww 4,951 Reputation points

2024-11-20T06:53:25.8766667+00:00

In the past threads you did very complicated things such like inserting / updating multiple records at a time using GridView and you questioned without letting us know details. I understand that you are still doing the same. Nobody will be able to answer unless you provide details,

Anonymous

You can check if the record exists in the database or not if not then insert the data:

// Check if the record already exists
SqlCommand checkCmd = new SqlCommand("SELECT COUNT(1) FROM Store WHERE Format = @Format AND Name = @Name AND Qty = @Qty", conn, transaction);
checkCmd.Parameters.AddWithValue("@Format", format);
checkCmd.Parameters.AddWithValue("@Name", name);
checkCmd.Parameters.AddWithValue("@Qty", qty);
int exists = (int)checkCmd.ExecuteScalar();
if (exists == 0) // Insert only if not exists
{
    SqlCommand insertCmd = new SqlCommand("INSERT INTO Store (Format, Name, Qty) VALUES (@Format, @Name, @Qty)", conn, transaction);
    insertCmd.Parameters.AddWithValue("@Format", format);
    insertCmd.Parameters.AddWithValue("@Name", name);
    insertCmd.Parameters.AddWithValue("@Qty", qty);
    insertCmd.ExecuteNonQuery();
}

and disable the button click <asp:Button ID="btnSave" runat="server" Text="Save" OnClick="btnSave_Click" OnClientClick="this.disabled=true; this.value='Processing...';" />

3 answers

Your answer

Anonymous

2024-11-20T05:37:19.95+00:00

May i know which application you are using and sample code you are using for insert.
SurferOnWww 4,951 Reputation points

2024-11-20T06:53:25.8766667+00:00

In the past threads you did very complicated things such like inserting / updating multiple records at a time using GridView and you questioned without letting us know details. I understand that you are still doing the same. Nobody will be able to answer unless you provide details,
Anonymous

2024-11-20T14:17:47.9266667+00:00

You can check if the record exists in the database or not if not then insert the data:

// Check if the record already exists SqlCommand checkCmd = new SqlCommand("SELECT COUNT(1) FROM Store WHERE Format = @Format AND Name = @Name AND Qty = @Qty", conn, transaction); checkCmd.Parameters.AddWithValue("@Format", format); checkCmd.Parameters.AddWithValue("@Name", name); checkCmd.Parameters.AddWithValue("@Qty", qty); int exists = (int)checkCmd.ExecuteScalar(); if (exists == 0) // Insert only if not exists { SqlCommand insertCmd = new SqlCommand("INSERT INTO Store (Format, Name, Qty) VALUES (@Format, @Name, @Qty)", conn, transaction); insertCmd.Parameters.AddWithValue("@Format", format); insertCmd.Parameters.AddWithValue("@Name", name); insertCmd.Parameters.AddWithValue("@Qty", qty); insertCmd.ExecuteNonQuery(); }

and disable the button click <asp:Button ID="btnSave" runat="server" Text="Save" OnClick="btnSave_Click" OnClientClick="this.disabled=true; this.value='Processing...';" />

Answer 1

how to avoid duplicate insert of gridview data using asp.net c# on button click for example

SqlConnection zcon = new SqlConnection(ConfigurationManager.ConnectionStrings["invConnectionString"].ConnectionString);
                zcon.Open();
                foreach (GridViewRow gvr in GridView3.Rows)
                {
                   
                   string data1 = ((Label)gvr.FindControl("L1")).Text;
                   string data2 = ((Label)gvr.FindControl("L2")).Text;
   	           string data3 = ((Label)gvr.FindControl("L3")).Text;

                    SqlCommand ck = new SqlCommand("Insert into Store(Format,Name,Qty)values(@Format,@Name,@Qty)", zcon);

                    ck.Parameters.Add(new SqlParameter("@Format", data1));
                    ck.Parameters.Add(new SqlParameter("@Name", data2));
                    ck.Parameters.Add(new SqlParameter("@Card_Qty", data3));  
                    ck.ExecuteNonQuery();

                }

My gridview has only this data

11111

sometimes it goes two times to sql database table or more how to avoid such duplicates..

RAVI 1,076 Reputation points

2024-11-20T08:15:52.9933333+00:00

My Gridview data look like this for example

On button click some times it saved same as gridview data in database table

sometime it saving two or more times how to avoid such duplication

Answer 2

sometime it saving two or more times how to avoid such duplication You did not explain the source of the double entry or why a duplicate entry is a problem in your unknown design. Could it be the user double click a button? Maybe the submitted submitted fields should be unique?

If we assume your design requires uniqueness, simply check if the record exists before adding the record. If there is a unique combination of fields in your design then add a unique constraint to the table.

IF NOT EXISTS(SELECT (1) FROM Store WHERE Format = @Format AND Name = @Name AND Qty = @Qty)
    Insert into Store(Format,Name,Qty) values(@Format,@Name,@Qty)

If you are trying to stop a user from double clicking the submit button then write a JavaScript click handler to and disable the button. We cannot see your markup so at this point it is not clear how to approach the JavaScript application. There are many online examples of disabling a button, just do a Google search.

https://www.google.com/search?q=JAvaScript+stop+submit+button+double+click+in+web+forms

Answer 3

Hi @RAVI,

You could try this code below code this will help you insert the data in the database and on duplicate insert it will show the log in the console.

WebForm1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>GridView Example</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:GridView ID="GridView3" runat="server" AutoGenerateColumns="False" GridLines="Both">
                <Columns>
                    <asp:TemplateField HeaderText="Format">
                        <ItemTemplate>
                            <asp:Label ID="L1" runat="server" Text='<%# Eval("Format") %>'></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Name">
                        <ItemTemplate>
                            <asp:Label ID="L2" runat="server" Text='<%# Eval("Name") %>'></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Qty">
                        <ItemTemplate>
                            <asp:Label ID="L3" runat="server" Text='<%# Eval("Qty") %>'></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>
                </Columns>
            </asp:GridView>
            <br />
<asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" />
        </div>
    </form>
</body>
</html>

WebForm1.aspx.cs:

using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Configuration;
namespace WebApplication1
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        string connectionString = "Data Source=.;Initial Catalog=GridViewDB;Integrated Security=True";
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                LoadGridView();
            }
        }
        private void LoadGridView()
        {
            // Simulate sample data
            DataTable dt = new DataTable();
            dt.Columns.Add("Format");
            dt.Columns.Add("Name");
            dt.Columns.Add("Qty");
            dt.Rows.Add("F1", "A1", 10);
            dt.Rows.Add("F1", "B4", 20);
            dt.Rows.Add("F1", "D3", 30);
            dt.Rows.Add("F1", "KL", 40);
            GridView3.DataSource = dt;
            GridView3.DataBind();
        }
        protected void btnSubmit_Click(object sender, EventArgs e)
        {
            using (SqlConnection zcon = new SqlConnection(ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString))
            {
                try
                {
                    zcon.Open();
                    foreach (GridViewRow gvr in GridView3.Rows)
                    {
                        string data1 = ((Label)gvr.FindControl("L1"))?.Text;
                        string data2 = ((Label)gvr.FindControl("L2"))?.Text;
                        string data3 = ((Label)gvr.FindControl("L3"))?.Text;
                        // Debug: Log each row data to ensure it's accessible
                        System.Diagnostics.Debug.WriteLine($"Processing Row: Format={data1}, Name={data2}, Qty={data3}");
                        SqlCommand checkCmd = new SqlCommand("SELECT COUNT(*) FROM Store WHERE Format = @Format AND Name = @Name AND Qty = @Qty", zcon);
                        checkCmd.Parameters.AddWithValue("@Format", data1);
                        checkCmd.Parameters.AddWithValue("@Name", data2);
                        checkCmd.Parameters.AddWithValue("@Qty", data3);
                        int count = (int)checkCmd.ExecuteScalar();
                        if (count == 0) // Insert only if the record doesn't exist
                        {
                            SqlCommand insertCmd = new SqlCommand("INSERT INTO Store (Format, Name, Qty) VALUES (@Format, @Name, @Qty)", zcon);
                            insertCmd.Parameters.AddWithValue("@Format", data1);
                            insertCmd.Parameters.AddWithValue("@Name", data2);
                            insertCmd.Parameters.AddWithValue("@Qty", data3);
                            insertCmd.ExecuteNonQuery();
                            // Debug: Log successful insertion
                            System.Diagnostics.Debug.WriteLine($"Inserted: Format={data1}, Name={data2}, Qty={data3}");
                        }
                        else
                        {
                            // Debug: Log duplicate row
                            System.Diagnostics.Debug.WriteLine($"Duplicate Skipped: Format={data1}, Name={data2}, Qty={data3}");
                        }
                    }
                    Response.Write("Data submitted successfully!");
                }
                catch (Exception ex)
                {
                    Response.Write("Error: " + ex.Message);
                }
            }
        }
    }
}

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Best Regards,

Jalpa

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asp.net gridview data insert two times how to avoid repeate

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