Question

i have a list collection like below :

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

namespace FileExplorer.Classes
  {
    public class NewAddedFiles
    {
        public string FileName { get; set; }
        public string FilePath { get; set; }
        public DateTime FileCreationDate { get; set; }
    }
}

---

    private void GetFilesFromDirectory(string PhysicalPath)
    {
        DirectoryInfo Dir = new DirectoryInfo(PhysicalPath);
        FileInfo[] FileList = Dir.GetFiles("*.*", SearchOption.AllDirectories);
        List<NewAddedFiles> list = new List<NewAddedFiles>();
        foreach (FileInfo FI in FileList)
        {
            NewAddedFiles NewAddedFile = new NewAddedFiles();
            string AbsoluteFilePath = FI.FullName;
            string RelativeFilePath =  string RelativeFilePath = "~/" + (AbsoluteFilePath.Replace(Request.ServerVariables["APPL_PHYSICAL_PATH"], String.Empty)).Replace("\\", "/");
            NewAddedFile.FileName = FI.Name;
            NewAddedFile.FilePath = RelativeFilePath;
            NewAddedFile.FileCreationDate = FI.CreationTime;
            list.Add(NewAddedFile);
        }
        Repeater1.DataSource = list;
        Repeater1.DataBind();
    }

my repeater in aspx is like below :

              <asp:Repeater ID="Repeater1" runat="server" 
                    onitemcommand="Repeater1_ItemCommand">
                    <ItemTemplate>
                        <asp:Image ID="imgArrowIconInsideRepeater" runat="server" ImageUrl="~/Images/Login/ArrowIcon.png" />
                        <asp:LinkButton ID="lbFile" runat="server" CommandName="lbFile_Click" CssClass="lbFileInRepeater"><%# Eval("FileName")%></asp:LinkButton>
                        <br />
                        <asp:Label ID="lblFileCreationDate" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "FileCreationDate", "{0:yyyy/MM/dd - tt h:m:s}") %>'
                            CssClass="lblFileCreationDateInRepeater"></asp:Label>
                        <div class="EmptyDiv">
                        </div>
                    </ItemTemplate>
                </asp:Repeater>

and Item_Command Of repeater in code behind :

protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e)
{

    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
        NewAddedFiles currentItem = (NewAddedFiles)e.Item.DataItem;

        switch (e.CommandName)
        {
            case "lbFile_Click":
                {
                    if (HttpContext.Current.Session["User_ID"] != null)
                    {
                        Response.Redirect("~/HandlerForRepeater.ashx?path=" + currentItem.FilePath);
                    }
                    else
                    {
                        ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", "alert('a');", true);
                    }
                    break;
                }

            default:
                {
                    break;
                }
        }
    }

}

my problem is currentItem is always null , when i click on every link button inside repeater!
i want to get FilePath of every link button inside repeater!
how can i do that ?

thanks in advance

Answer 1

From memory (and reinforced from Google searches), ItemCommand is one of the events that loads data from the ViewState. Once this happens, your original DataItem references do not exist anymore.

If you want to retrieve values from that item, as clunky as it sounds, you’ll need to add a HiddenField to your Repeater ItemTemplate, like so:

<asp:HiddenField ID="filePath" runat="server" Value='<%# DataBinder.Eval(Container.DataItem, "FilePath")' />

and then replace this line:

Response.Redirect("~/HandlerForRepeater.ashx?path=" + currentItem.FilePath);

with these two lines:

HiddenField filePath = (HiddenField) e.Item.FindControl("filePath");
Response.Redirect("~/HandlerForRepeater.ashx?path=" + filePath.Value);