No overload for 'InsertButton_Click' matches delegate 'System.EventHandler' [error]

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How come my event handling is not working? I'm getting this error. I'm running VS 2008 / .NET 3.5 SP1 / Win XP, and, just in case the source code is available here.

Error 1 No overload for 'InsertButton_Click' matches delegate 'System.EventHandler' c:\inetpub\wwwroot\Jon's Couch\Articles.aspx.cs 21 31 http://localhost/Jon's Couch/

Articles.aspx

XML

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Articles.aspx.cs" Inherits="Articles" %>
<!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 id="Head1" runat="server">
    <link href="StyleSheet.css" rel="stylesheet" type="text/css" />
    <title>@Jon's</title>
</head>
<body>
    <form id="form1" runat="server">
    <h1>@Jon's <img src="images/sofa.jpg" alt="logo"/> </h1 >
    <div style="float:left;width:122px">
        <p style="width: 122px; height: 663px; margin-top: 0px; margin-right: 0px;">
        <a href="About.aspx">About me</a> <br />
        <a href="Diary.aspx">My diary</a> <br />
        <a href="Articles.aspx">Articles</a> <br />
        <a href="Bookmarks.aspx">My bookmarks</a> <br />
        <a href="Promotions.aspx">Promotions</a> <br />
        <a href="Resume.aspx">My resume</a> <br />
        <a href="Warez.aspx">Filesharing</a> <br />
        </p>
      </div>
   <div>
   <asp:FormView ID="Envelope" runat="server" DataSourceID="SqlDataSource1"
            AllowPaging="True">
        <HeaderTemplate>
        </HeaderTemplate>
        <EditItemTemplate>
            Timestamp:
            <asp:TextBox ID="TimestampTextBox" runat="server"
                Text='<%# Bind("Timestamp") %>' />
            <br />
            Subject:
            <asp:TextBox ID="SubjectTextBox" runat="server" Text='<%# Bind("Subject") %>' />
            <br />
            EntryText:
            <asp:TextBox ID="EntryTextTextBox" runat="server"
                Text='<%# Bind("EntryText") %>' />
            <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" />
            <asp:Button ID="Edit" runat="server" Text="Edit" CommandName="edit" /> <br />
            <asp:Button ID="New" runat="server" Text="New" CommandName="new" /> <br />
        </EditItemTemplate>
         <InsertItemTemplate>
             Timestamp:
             <asp:TextBox ID="TimestampTextBox" runat="server"
                 Text='<%# Bind("Timestamp") %>' />
             <br />
             Subject:
             <asp:TextBox ID="SubjectTextBox" runat="server" Text='<%# Bind("Subject") %>' />
             <br />
             EntryText:
             <asp:TextBox ID="EntryTextTextBox" runat="server"
                 Text='<%# Bind("EntryText") %>' />
             <br />
             <asp:LinkButton ID="InsertButton" runat="server" CausesValidation="True"
                 CommandName="Insert" Text="Insert" OnClick="InsertButton_Click" />
             &nbsp;<asp:LinkButton ID="InsertCancelButton" runat="server"
                 CausesValidation="False" CommandName="Cancel" Text="Cancel" />
        </InsertItemTemplate>
        <ItemTemplate>
            Timestamp:
            <asp:Label ID="TimestampLabel" runat="server" Text='<%# Bind("Timestamp") %>' />
            <br />
            Subject:
            <asp:Label ID="SubjectLabel" runat="server" Text='<%# Bind("Subject") %>' />
            <br />
            EntryText:
            <asp:Label ID="EntryTextLabel" runat="server" Text='<%# Bind("EntryText") %>' />
            <br />
        </ItemTemplate>
 </asp:FormView>
     <asp:SqlDataSource ID="SqlDataSource1" runat="server"
                ConnectionString="<%$ ConnectionStrings:couch_dbConnectionString %>"
                SelectCommand="SELECT [Timestamp], [Subject], [EntryText] FROM [Article]"
                UpdateCommand="UPDATE [Article] SET [Timestamp] = @Timestamp, [Subject] = @Subject, [EntryText] = @EntryText"
                InsertCommand="INSERT INTO [Article] ([EntryID], [Timestamp], [Subject], [EntryText]) VALUES @EntryID, @Timestamp, @Subject, [EntryText]">
           </asp:SqlDataSource>
   </div>
</form>
</body>
</html>

Articles.aspx.cs

C#

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Web.Configuration;
public partial class Articles : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        this.Title = "Jon's Couch";
    }
    protected delegate EventHandler InsertButton_Click (object sender, FormViewCommandEventArgs e);
    InsertButton_Click += new System.EventHandler(this.InsertButton_Click);
    protected void InsertButton_Click(object sender, FormViewCommandEventArgs e)
    {
        if (e.CommandName == "new")
        {
            Envelope.DefaultMode = FormViewMode.Insert;
        }
    }
}

:confused:

Posted 4-Sep-10 0:09am

jon-80

Updated 27-Jun-16 23:51pm

v2

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Comments

koool.kabeer 4-Sep-10 6:31am

i think you are trying something new....

jon-80 4-Sep-10 6:40am

What's the correct way?

koool.kabeer 4-Sep-10 6:48am

what is your actual requirement?

Member 13928033 3-Oct-18 5:18am

didnt work

2 solutions

Solution 1

Is it a typo? Shouldn't this line

InsertButton_Click += new System.EventHandler(this.InsertButton_Click);

be moved to the possibly the Page_Load event or even the Pre_Init?

Posted 4-Sep-10 3:30am

Not Active

Comments

Abhishek Sur 4-Sep-10 12:33pm

I think ASP.NET can easily do this without even specifying this event handler. Just specifying the EventHandler in ASPX page will be a better approach.
But this should definitely be within Page_Load. One cannot run expression outside any method.

Got my 5 Mark.

jon-80 4-Sep-10 12:47pm

Would you please add a code snippet or a link to a related article as an example?

jon-80 4-Sep-10 12:49pm

My actual requirement is to have a <formview> that somehow binds to a datasource (SQL Server 2005), and, allows the user to read, edit, insert, update and delete from the form. If a form is not available, some kind of <textbox> or interface is good enough. This is really basic, I just can't figure out how to do it in ASP.NET.

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sumitha.v.r · Accepted Answer · 2012-02-23T21:21:00

Solution 2

use System.Eventargs e. It will solve your problem.... Like...

private void button1_Click(object sender, System.EventArgs e)
{

}

Posted 23-Feb-12 21:21pm

sumitha.v.r

Comments

Member 10044316 19-Oct-14 18:40pm

thanks