?
Solved

Passing parameter to code behind

Posted on 2016-09-22
17
Medium Priority
?
56 Views
Last Modified: 2016-09-22
Hi,

in the front end, I have the code like this
<asp:Button id="MoveAllbtn" onclick="MoveAllbtn_Click" CustomParameter="listBox1" runat="server" text=">>" />      

Since I want to use the same function, I want to pass the same of the listBox to the function.

In the code behind, I have the code
    protected void MoveAllbtn_Click(object sender, EventArgs e)
    {
       

        foreach (var item in listBox1.Items.Cast<ListItem>().Reverse())
        {
              //some codes
        }
        
        string ID=e.CommandArgument.ToString();
	testBox.Text = ID;
        
    }

Open in new window


I am getting error

CS1061: 'System.EventArgs' does not contain a definition for 'CommandArgument' and no extension method 'CommandArgument' accepting a first argument of type 'System.EventArgs' could be found (are you missing a using directive or an assembly reference?)


any ideas?  thanks
0
Comment
Question by:mcrmg
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 7
  • 6
  • 4
17 Comments
 
LVL 12

Expert Comment

by:Ramkisan Jagtap
ID: 41810792
Convert object sender to button and then get its id

protected void MoveAllbtn_Click(object sender, EventArgs e)
    {
       

        foreach (var item in listBox1.Items.Cast<ListItem>().Reverse())
        {
              //some codes
        }
        
       Button moveAllbtn=(Button)sender;
	testBox.Text = moveAllbtn.ID;
        
    }

Open in new window

0
 

Author Comment

by:mcrmg
ID: 41810798
Thanks for the quick reply. I am geting this error:

 CS0104: 'Button' is an ambiguous reference between 'System.Web.UI.WebControls.Button' and 'System.Windows.Forms.Button'
0
 
LVL 20

Expert Comment

by:Daniel Van Der Werken
ID: 41810825
This is how you fix that. However, I don't think this code is going to function the way you want.

 
   protected void MoveAllbtn_Click(object sender, EventArgs e)
    {

        foreach (var item in listBox1.Items.Cast<ListItem>().Reverse())
        {
            //string iText = item.Text;
        }

        System.Web.UI.WebControls.Button moveAllBtn = (System.Web.UI.WebControls.Button)sender;

        string ID = moveAllBtn.CommandArgument.ToString();
        testBox.Text = ID;
    }

Open in new window


Can you explain more on what you're trying to do?
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 12

Expert Comment

by:Ramkisan Jagtap
ID: 41810843
Yes, as Daniel said use System.Web.UI.WebControls.Button
0
 
LVL 20

Expert Comment

by:Daniel Van Der Werken
ID: 41810852
This will get the custom value you passed:

    protected void MoveAllbtn_Click(object sender, EventArgs e)
    {

        foreach (var item in listBox1.Items.Cast<ListItem>().Reverse())
        {
            string iText = item.Text;
        }

        System.Web.UI.WebControls.Button moveAllBtn = (System.Web.UI.WebControls.Button)sender;

        AttributeCollection attributColl = moveAllBtn.Attributes;
        if (attributColl != null && attributColl.Count > 0 && attributColl["CustomParameter"] != null)
        {
            string myCustomParameterValue = attributColl["CustomParameter"];
        }

        string ID = moveAllBtn.CommandArgument.ToString();
        testBox.Text = ID;
    }

Open in new window

0
 

Author Comment

by:mcrmg
ID: 41810873
I am getting this error  (sorry)

CS0104: 'AttributeCollection' is an ambiguous reference between 'System.Web.UI.AttributeCollection' and 'System.ComponentModel.AttributeCollection'
0
 
LVL 12

Expert Comment

by:Ramkisan Jagtap
ID: 41810876
Use System.Web.UI.AttributeCollection there
0
 
LVL 20

Expert Comment

by:Daniel Van Der Werken
ID: 41810881
You'd have to cast. Seems strange. You're adding too many using statements.

        System.Web.UI.AttributeCollection attributColl = (System.Web.UI.AttributeCollection)moveAllBtn.Attributes;
        if (attributColl != null && attributColl.Count > 0 && attributColl["CustomParameter"] != null)
        {
            string myCustomParameterValue = attributColl["CustomParameter"];
        }

Open in new window


Get rid of your Windows using if you can.
1
 

Author Comment

by:mcrmg
ID: 41810894
This is what I have
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Data;
//using System.Windows.Forms;
using System.Text;
using System.ComponentModel;
using System.Drawing;
using System.Web.UI.AttributeCollection;

public partial class _test2 : System.Web.UI.Page

{
    protected void Page_Load(object sender, EventArgs e)
    {


    }

    protected void MoveAllbtn_Click(object sender, EventArgs e)
    {



        foreach (var item in listBox1.Items.Cast<ListItem>().Reverse())
        {
            //something
        }

        System.Web.UI.WebControls.Button moveAllBtn = (System.Web.UI.WebControls.Button)sender;

        AttributeCollection attributColl = moveAllBtn.Attributes;
        if (attributColl != null && attributColl.Count > 0 && attributColl["CustomParameter"] != null)
        {
            string myCustomParameterValue = attributColl["CustomParameter"];
        }

        string ID = moveAllBtn.CommandArgument.ToString();
        testBox.Text = ID;
        
    }

Open in new window

0
 
LVL 12

Expert Comment

by:Ramkisan Jagtap
ID: 41810928
Does it work now?
0
 

Author Comment

by:mcrmg
ID: 41810932
this is the error I am getting

CS0138: A using namespace directive can only be applied to namespaces; 'System.Web.UI.AttributeCollection' is a type not a namespace
0
 
LVL 12

Expert Comment

by:Ramkisan Jagtap
ID: 41810935
Remove following line:
using System.Web.UI.AttributeCollection;
0
 

Author Comment

by:mcrmg
ID: 41810942
After removing,

CS0104: 'AttributeCollection' is an ambiguous reference between 'System.Web.UI.AttributeCollection' and 'System.ComponentModel.AttributeCollection'

thanks
0
 
LVL 20

Accepted Solution

by:
Daniel Van Der Werken earned 1000 total points
ID: 41810965
Did you use my suggested code?

        System.Web.UI.AttributeCollection attributColl = (System.Web.UI.AttributeCollection)moveAllBtn.Attributes;
        if (attributColl != null && attributColl.Count > 0 && attributColl["CustomParameter"] != null)
        {
            string myCustomParameterValue = attributColl["CustomParameter"];
        }

Open in new window


It does not look like you are.
1
 

Author Comment

by:mcrmg
ID: 41810992
I am sorry if I confused everyone....this is the latest code I use, and it looks like it is moving..thanks

The error I am getting is
CS0103: The name 'myCustomParameterValue' does not exist in the current context

        foreach (var item in listBox1.Items.Cast<ListItem>().Reverse())
        {
            string iText = item.Text;
        }

        System.Web.UI.AttributeCollection attributColl = (System.Web.UI.AttributeCollection)MoveAllbtn.Attributes;
        if (attributColl != null && attributColl.Count > 0 && attributColl["CustomParameter"] != null)
        {
            string myCustomParameterValue = attributColl["CustomParameter"];
        }

        testBox.Text = myCustomParameterValue;

Open in new window

0
 
LVL 12

Assisted Solution

by:Ramkisan Jagtap
Ramkisan Jagtap earned 1000 total points
ID: 41811020
System.Web.UI.AttributeCollection attributColl = (System.Web.UI.AttributeCollection)MoveAllbtn.Attributes;
        if (attributColl != null && attributColl.Count > 0 && attributColl["CustomParameter"] != null)
        {
            string myCustomParameterValue = attributColl["CustomParameter"];
  testBox.Text = myCustomParameterValue;
}

Open in new window

0
 

Author Closing Comment

by:mcrmg
ID: 41811032
Thank you very much.
0

Featured Post

New benefit for Premium Members - Upgrade now!

Ready to get started with anonymous questions today? It's easy! Learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Today is the age of broadband.  More and more people are going this route determined to experience the web and it’s multitude of services as quickly and painlessly as possible. Coupled with the move to broadband, people are experiencing the web via …
Introduction This article shows how to use the open source plupload control to upload multiple images. The images are resized on the client side before uploading and the upload is done in chunks. Background I had to provide a way for user…
Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB. To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…
Suggested Courses

801 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question