get id of items that i click on button in a datalist with itemtemplate

Question

hi friends

i have a datalist on my page and design it on template

i have some button and image and hyperlink to it;
now i wand when i clicked a button of one item's , i can get id of that item

how can i do that?

my code is here but with some error

protected void Button1_Click(object sender, EventArgs e)
    {
        Label1.Text = ProdID.ToString();
       // ShoppungCart.GetShoppingCart().AddItem(ProdID);
       // Response.Redirect("ViewCart.aspx");
    }
    protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
    {
        int ProdID = Convert.ToInt32(DataList1.DataKeys[e.Item.ItemIndex]);
    }

but label1 is null and maybe ProdID is null;
why?

Rujuta · Answer

When you add a imagebutton to the itemtemplate go to its properties and change the CommandName property to your desired name here lets say we call it Add to Cart. Also the label for the id field will have the id=IdLabel Now in the coding protected void DataList1_ItemCommand(object source DataListCommandEventArgs e) { int i; if (e.CommandName == Add to Cart) { i = e.Item.ItemIndex; Label l = (Label)DataList1.Items[i].FindControl(IdLabel); Response.Write(l.Text); //here add the logical implementation of adding item to cart now that you have got hold of your id } }

Bahar Jalali · Answer

no i have a DATALIST no gridview and my datalist is in a page that users can see it and i don't want have any checkbox on it really i want have an image button that work like select in a datalist it's means when users click on imagebutton  that product added to the shopping cart

Rujuta · Answer

When you add a imagebutton to the itemtemplate go to its properties and change the CommandName property to your desired name here lets say we call it Add to Cart. Also the label for the id field will have the id=IdLabel Now in the coding protected void DataList1_ItemCommand(object source DataListCommandEventArgs e) { int i; if (e.CommandName == Add to Cart) { i = e.Item.ItemIndex; Label l = (Label)DataList1.Items[i].FindControl(IdLabel); Response.Write(l.Text); //here add the logical implementation of adding item to cart now that you have got hold of your id } }

Rujuta · Answer

There's another simpler way too... Enable selecting in your gridview and then in code behind use the following code protected void GridView1_SelectedIndexChanged( object sender EventArgs e) { int i = GridView1.SelectedIndex; Response.Write(GridView1.Rows[i].Cells[1].Text); Response.Write(GridView1.Rows[i].Cells[2].Text); //Response.Write(i); } Hope this helps too....

Rujuta · Answer

Instead of using a button it's a lot more convinient to use a checkbox so that it can be easily mapped. All you've got to do is in the template field add a checkbox with id=cbx. Now keep a button outside of the gridview on the page. Use the following code to get the id of items selected through checkbox. for ( int i = 0; i { GridViewRow row = GridView1.Rows[i]; bool isChecked = (( CheckBox )row.FindControl( cbxSelect )).Checked; if (isChecked) { str.Append(GridView1.Rows[i].Cells[0].Text); } } Label1.Text = str.ToString(); Hope this helps Happy Coding....