ASP.NET ListView single click edit

you can do a bulk edit:
http://www.codeproject.com/KB/webforms/BulkEditGridView.aspx

Which should answer the first part of your question regarding a single click.  If you want a view mode/edit mode then you can make the cells onclick event call the edit command.

Thanks for such a quick response...

the example you've shown is for a gridview, will that matter, or are there enough similarities?

http://weblogs.asp.net/anasghanem/archive/2008/09/06/comparing-listview-with-gridview-datalist-and-repeater.aspx

Listview can do all.

I found pretty much exactly what I was looking for here:

http://mattberseth.com/blog/2008/05/bulk_inserting_data_with_the_l.html

though I can't seem to get it to work with a datasourceobject targeting a tableadapter from the dataset xsd I'm using.  He implements a class for his own data access layer, but I can't seem to make much sense of why I keep getting the following exception:

System.NullReferenceException was unhandled by user code
  Message="Object reference not set to an instance of an object."
  Source="WebApplication3"
  StackTrace:
       at WebApplication3._Default.UpdateListViewItem(Object sender, EventArgs e) in C:\Documents and Settings\Loren Kimble\My Documents\Visual Studio 2008\Projects\WebApplication3\WebApplication3\Default.aspx.cs:line 53
       at System.Web.UI.WebControls.Button.OnClick(EventArgs e)
       at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)
       at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
       at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
       at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
       at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
  InnerException:

can you post your code and highlite the line that triggers the error?

ged325,
Thanks for the reply, I've tried several techniques for the update (as seen in code below), but the error consistently occurs during the traversal of listview elements such as:

foreach (ListViewDataItem di in this.Items)
   this.UpdateItem(di.DataItemIndex, false);

...
<script>
        //*****FIRST UPDATING TECHNIQUIE I TRIED***method for updating the data after the update button click
        protected void Updatevw(object sender, EventArgs e)
        {
            foreach (ListViewDataItem i in this.lv.Items)
            {
                ListViewItem item = lv.Items[i.DataItemIndex];
                int bpforecastid = new int();
                int bpforecastid = int.Parse(lv.DataKeys[i.DataItemIndex].Value.ToString());
 
                TextBox tForecast = (TextBox)item.FindControl("FORECASTLabel");
                TextBox tActual = (TextBox)item.FindControl("ACTUALLabel");
 
                // insert records into database
                using (SqlConnection conn = new SqlConnection(_connStr))
                {
                    string Sql = "update BP_FORECAST set forecast = @forecast, actual = @actual where BPFORECASTID = @bpforecastid";
                    conn.Open();
                    using (SqlCommand dCmd = new SqlCommand(Sql, conn))
                    {
                        dCmd.Parameters.AddWithValue("@bpforecastid", bpforecastid);
                        dCmd.Parameters.AddWithValue("@forecast", tForecast.Text.Trim());
                        dCmd.Parameters.AddWithValue("@Actual", tActual.Text.Trim());
                        dCmd.ExecuteNonQuery();
                    }
                    conn.Close();
                }
            }
                lv.EditIndex = -1;
                // Rebind the details
                BindPersonDetails();
        }
...        //****SECOND TECHNIQUE FOR UPDATING DATA*** this time actually wiring up 
           // the objectdatasource to the ListView by datasourceid...still blows up at the 
           //   "this.UpdateItem(di.DataItemIndex, false);"
        protected override void OnItemCommand(ListViewCommandEventArgs e)
        {            
            base.OnItemCommand(e);
            SaveItems();
        }
 
        /// <summary>
        /// Save ListView Items.
        /// </summary>
        public void SaveItems()
        {
            // Update all items on Command (InsertItem is not included in Items collection)
            foreach (ListViewDataItem di in this.Items)
                this.UpdateItem(di.DataItemIndex, false);
        }...
</script>
...
<%--Listview without an edititemtempate or datasource--%>
        <asp:ListView ID="lv" runat="server">
            <ItemTemplate>
                <td runat="server" style="background-color: #E0FFFF;color: #333333;">
                    <asp:Label ID="BPFORECASTIDLabel" runat="server" Text='<%# Eval("BPFORECASTID") %>' /><br />
                    <asp:Label ID="BPIDLabel" runat="server" Text='<%# Eval("BPID") %>' /><br />
                    <asp:Label ID="PAGELabel" runat="server" Text='<%# Eval("PAGE") %>' /><br />
                    <asp:Label ID="MONTHIDLabel" runat="server" Text='<%# Eval("MONTHID") %>' /><br />
                    <asp:TextBox ID="FORECASTLabel" runat="server" Text='<%# Bind("FORECAST") %>' /><br />
                    <asp:TextBox ID="ACTUALLabel" runat="server" Text='<%# Bind("ACTUAL") %>' /><br />
                </td>
            </ItemTemplate>        
            <LayoutTemplate>
                <table runat="server" border="1" 
                    style="background-color: #FFFFFF;border-collapse: collapse;border-color: #999999;border-style:none;border-width:1px;font-family: Verdana, Arial, Helvetica, sans-serif;">
                    <tr ID="itemPlaceholderContainer" runat="server">
                        <td ID="itemPlaceholder" runat="server">
                        </td>
                    </tr>
                </table>
                <div style="text-align: center;background-color: #5D7B9D;font-family: Verdana, Arial, Helvetica, sans-serif;color: #FFFFFF">
                </div>
            </LayoutTemplate>
        </asp:ListView>
...

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Are you using a dataset to do this?  Would be a lot easier for the dataset to do the update then 1 record at a time.  (Dataset would do dirty rows only).

see this:
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.listview.updateitem.aspx
did you specify an update command?

also it looks like they are using item.DisplayIndex . . . you may be running out of bounds.