How to get the id from datalist ?

Question

0.00/5 (No votes)

See more:

C#

SQL-Server

SQL-Server-2008

, +

I have datalist which has items

and under every item there is a link

VB

<asp:LinkButton runat="server" ID="Add" OnClick="lnkAdd_Click"
                Text="Add to cart" CommandName="Add" />

I make event handler for this link like that

C#

protected void lnkAdd_Click(object sender, EventArgs e)
  {
    //  int ProId =Convert.ToInt32(((Label)ListView_Products.Controls[0].FindControl("IDLabel")).Text);

      int ProductID = int.Parse("ItemID");
      AddToShoppingCart(ProductID);
      Response.Redirect("ShoppingCartaspx.aspx");
  }

my question
how to get productID from datalist ???
it gives me error null reference

thanks in advance .

Posted 28-Apr-12 11:23am

Sarah Mohammed77

Add a Solution

3 solutions

Solution 2

Use This Syntax

C#

DataListItem dl = ((DataListItem)(DataControlFieldCell(((ImageButton)sender).Parent).Parent));

Int32 var = Convert.Toint32(((Label)dl.FindControl("lbl")).ToString());

Posted 28-Apr-12 20:33pm

Chandan Aryan

Updated 29-Apr-12 0:36am

v2

Solution 3

If you have many products and want to make multi-selection enable, then just use below code inside for loop.

C#

Label lblID = (Label)DList1.Items[i].FindControl("IDLabel");
Int32 PID = Convert.ToInt32(lblID.ToString();

Only Difference is that
Reply if some confusion.

John Bhatt,
P.Yar.B Complex

Posted 28-Apr-12 20:39pm

John Bhatt

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sandeep Mewara · Accepted Answer · 2012-04-28T20:05:00

Try:
Following binds the ItemID to the CommandArgument of the LinkButton.

XML

<asp:LinkButton ID="LinkButton1" runat="server" Text="Add to cart"
   OnClick="LinkButton1_Click" CommandArgument='<%# Eval("ItemID") %>' />

You can then retrieve it like this in the code behind:

C#

protected void LinkButton1_Click(object sender, EventArgs e)
{
  LinkButton myButton = sender as LinkButton;
  if (myButton != null)
  {
     int id = Convert.ToInt32(myButton.CommandArgument);
  }
}

The sender holds a reference to the LinkButton that triggered the event handler.
You can cast the object into a LinkButton and then retrieve its CommandArgument and cast that into an int.