problem:always inserting data when i refresh browser in asp.net(C#)

Question

1.00/5 (2 votes)

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----here's my code from aspx file----

XML

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="default.aspx.cs" Inherits="Inventory._default" %>

<!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:FormView ID="FormView1" runat="server" DataKeyNames="ProductID"
            DataSourceID="dsProducts" DefaultMode="Insert"
            oniteminserted="FormView1_ItemInserted">
            <EditItemTemplate>
                ProductID:
                <asp:Label ID="ProductIDLabel1" runat="server"
                    Text='<%# Eval("ProductID") %>' />
                <br />
                ProductName:
                <asp:TextBox ID="ProductNameTextBox" runat="server"
                    Text='<%# Bind("ProductName") %>' />
                <br />
                Price:
                <asp:TextBox ID="PriceTextBox" runat="server" Text='<%# Bind("Price") %>' />
                <br />
                CategoryID:
                <asp:TextBox ID="CategoryIDTextBox" runat="server"
                    Text='<%# Bind("CategoryID") %>' />
                <br />
                Category:
                <asp:TextBox ID="CategoryTextBox" runat="server"
                    Text='<%# Bind("Category") %>' />
                <br />
                <asp:LinkButton ID="UpdateButton" runat="server" CausesValidation="True"
                    CommandName="Update" Text="Update" />
                &nbsp;<asp:LinkButton ID="UpdateCancelButton" runat="server"
                    CausesValidation="False" CommandName="Cancel" Text="Cancel" />
            </EditItemTemplate>
            <InsertItemTemplate>
                ProductName:
                <asp:TextBox ID="ProductNameTextBox" runat="server"
                    Text='<%# Bind("ProductName") %>' />
                <br />
                Price:
                <asp:TextBox ID="PriceTextBox" runat="server" Text='<%# Bind("Price") %>' />
                <br />
                Category:
                <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
                    DataSourceID="dsCategories" DataTextField="CategoryName"
                    DataValueField="CategoryID">
                </asp:DropDownList>
                <asp:EntityDataSource ID="dsCategories" runat="server"
                    ConnectionString="name=InventoryEntities"
                    DefaultContainerName="InventoryEntities" EnableFlattening="False"
                    EntitySetName="Categories" Select="it.[CategoryID], it.[CategoryName]">
                </asp:EntityDataSource>
                <br />
                <asp:LinkButton ID="InsertButton" runat="server" CausesValidation="True"
                    CommandName="Insert" Text="Insert" />
&nbsp;<asp:LinkButton ID="InsertCancelButton" runat="server" CausesValidation="False"
                    CommandName="Cancel" Text="Cancel" />
            </InsertItemTemplate>
            <ItemTemplate>
                ProductID:
                <asp:Label ID="ProductIDLabel" runat="server" Text='<%# Eval("ProductID") %>' />
                <br />
                ProductName:
                <asp:Label ID="ProductNameLabel" runat="server"
                    Text='<%# Bind("ProductName") %>' />
                <br />
                Price:
                <asp:Label ID="PriceLabel" runat="server" Text='<%# Bind("Price") %>' />
                <br />
                CategoryID:
                <asp:Label ID="CategoryIDLabel" runat="server"
                    Text='<%# Bind("CategoryID") %>' />
                <br />
                Category:
                <asp:Label ID="CategoryLabel" runat="server" Text='<%# Bind("Category") %>' />
                <br />
                <asp:LinkButton ID="EditButton" runat="server" CausesValidation="False"
                    CommandName="Edit" Text="Edit" />
                &nbsp;<asp:LinkButton ID="DeleteButton" runat="server" CausesValidation="False"
                    CommandName="Delete" Text="Delete" />
                &nbsp;<asp:LinkButton ID="NewButton" runat="server" CausesValidation="False"
                    CommandName="New" Text="New" />
            </ItemTemplate>
        </asp:FormView>
        <asp:EntityDataSource ID="dsProducts" runat="server"
            ConnectionString="name=InventoryEntities"
            DefaultContainerName="InventoryEntities" EnableDelete="True"
            EnableFlattening="False" EnableInsert="True" EnableUpdate="True"
            EntitySetName="Products">
        </asp:EntityDataSource>
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
            DataKeyNames="ProductID" DataSourceID="dsProducts">
            <Columns>
                <asp:BoundField DataField="ProductID" HeaderText="ProductID" ReadOnly="True"
                    SortExpression="ProductID" />
                <asp:BoundField DataField="ProductName" HeaderText="ProductName"
                    SortExpression="ProductName" />
                <asp:BoundField DataField="Price" HeaderText="Price" SortExpression="Price" />
                <asp:BoundField DataField="CategoryID" HeaderText="CategoryID"
                    SortExpression="CategoryID" />
            </Columns>
        </asp:GridView>

    </div>
    </form>
</body>
</html>

-------------------------------------

----here's my code for my aspx.cs file----

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

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

        }

        protected void FormView1_ItemInserted(object sender, FormViewInsertedEventArgs e)
        {
            GridView1.DataBind();
        }
    }
}

-------------------------------------

how solve this master need help. thanks in advance..

Posted 24-Jun-12 14:24pm

newbie011292

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Comments

Sergey Alexandrovich Kryukov 24-Jun-12 21:30pm

Not a question. What's the problem?
--SA

4 solutions

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**AmitGajjar** · Answer 1 · 2012-06-24T18:54:00

Solution 4

Hi,

Here is the similar discussion on your problem,

StackOverflow discussion[^]

PCReview discussion[^]

hope one of the solution from above discussion will work for you

thanks
-amit.

Posted 24-Jun-12 18:54pm

AmitGajjar

Aniruddh Bhatt · Answer 2 · 2012-06-24T16:38:00

Solution 1

write your code on auto postback event.

Posted 24-Jun-12 16:38pm

Aniruddh Bhatt

AshishChaudha · Answer 3 · 2012-06-24T18:16:00

Solution 2

Please follow the code..

C#

if(!ispostback)
{
  GridView1.DataBind();
}

Thanks
Ashish

Posted 24-Jun-12 18:16pm

AshishChaudha

AmitKumar89 · Answer 4 · 2012-06-24T18:25:00

Hi,
It is the property of asp.net that stores the controls value in viewstate. After inserting the data in database if you are clearing the controls data then also for some time the data will be there in viewstate. Only one solution of this problem is to remove viewstate after inserting the data. If you are able to clear viewstate then only you'll be able to solve this problem.

All the best.
--AK