how do iam getting an error in page is postback

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hi iam getting an errors in sample project

C#

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

namespace pageispostback12
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (page.ispostback==false)
            {
                arraylist al = new arraylist();
                al.add("mpc");
                al.add("bipc");
                al.add("cec");
                al.add("hec");
                al.trimtosize();
                al.sort();
                RadioButtonList1.DataSource=al;
                RadioButtonList1.DataBind();
            }
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            Label1.Text="Name:"+TextBox1.Text+"<br/>group:"+RadioButtonList1.SelectedItem.ToString();
        }
        }

        }

Posted 28-Jan-14 22:49pm

harshavardhan12345678

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Karthik_Mahalingam · Accepted Answer · 2014-01-28T22:52:00

Solution 1

Syntax_error[^]
try this

C#

protected void Page_Load(object sender, EventArgs e)
       {
           if (Page.IsPostBack == false)
           {
               ArrayList al = new ArrayList();
               al.Add("mpc");
               al.Add("bipc");
               al.Add("cec");
               al.Add("hec");
               al.TrimToSize();
               al.Sort();
               RadioButtonList1.DataSource = al;
               RadioButtonList1.DataBind();
           }
       }

Posted 28-Jan-14 22:52pm

Karthik_Mahalingam

Comments

harshavardhan12345678 29-Jan-14 4:55am

Error 1 The type or namespace name 'Arraylist' could not be found (are you missing a using directive or an assembly reference?) c:\visual studio 2010\Projects\pageispostback12\pageispostback12\Default.aspx.cs pageispostback12

Karthik_Mahalingam 29-Jan-14 4:55am

check my solution..

harshavardhan12345678 29-Jan-14 4:58am

3 errors in arraylist line

harshavardhan12345678 29-Jan-14 5:00am

Error 1 The type or namespace name 'Arraylist' could not be found (are you missing a using directive or an assembly reference?) c:visual studio 2010\Projects\pageispostback12\pageispostback12\Default.aspx.cs 16 17 pageispostback12

Karthik_Mahalingam 29-Jan-14 5:03am

its not Arraylist .......its ArrayList

Karthik_Mahalingam 29-Jan-14 5:04am

Please see carefully...

harshavardhan12345678 29-Jan-14 5:05am

same problem repeated
Error 1 The type or namespace name 'ArrayList' could not be found (are you missing a using directive or an assembly reference?) c:\visual studio 2010\Projects\pageispostback12\pageispostback12\Default.aspx.cs 16 17 pageispostback12

harshavardhan12345678 29-Jan-14 5:11am

Error 1 The type or namespace name 'ArrayList' could not be found (are you missing a using directive or an assembly reference?) c:\visual studio 2010\Projects\pageispostback12\pageispostback12\Default.aspx.cs 16 17 pageispostback12

harshavardhan12345678 29-Jan-14 5:07am

ok

Karthik_Mahalingam 29-Jan-14 5:11am

issue resolved ??

Karthik_Mahalingam 29-Jan-14 5:13am

add this in your first line : ( top of the cs file)

using System.Collections;

harshavardhan12345678 29-Jan-14 5:18am

Error 1 'System.Collections.ArrayList' does not contain a definition for 'TrimTosize' and no extension method 'TrimTosize' accepting a first argument of type 'System.Collections.ArrayList' could be found (are you missing a using directive or an assembly reference?) c:
visual studio 2010\Projects\pageispostback12\pageispostback12\Default.aspx.cs 22 20 pageispostback12

Karthik_Mahalingam 29-Jan-14 5:21am

TrimToSize

harshavardhan12345678 29-Jan-14 5:21am

success

harshavardhan12345678 29-Jan-14 5:19am

thanks karthik

Karthik_Mahalingam 29-Jan-14 5:22am

Welcome harshavardhan :)

harshavardhan12345678 29-Jan-14 5:19am

issue solved.....

Karthik_Mahalingam 29-Jan-14 5:22am

good

harshavardhan12345678 29-Jan-14 5:48am

another problem in hashtable project
Error 2 ; expected c:visual studio 2010\Projects\hashtable\hashtable\Default.aspx.cs 16 32 hashtable

Karthik_Mahalingam 29-Jan-14 6:41am

put a colen (;)at the end.

Joezer BH 29-Jan-14 11:44am

5ed!