Adding an item to a List when clicking a WebPart Properties 'OK' button

Question

Hi all,
I wonder if someone can help me. Im new to SharePoint Programming but learning slowly. 
I have a superb Web Part downloaded from Codeplex which essentially is a Countdown Timer in jQuery. (spCountdown) The code itself works perfectly however I want to tweak it, in what I thought would be a relatively easy thing to do.
In the Web Part properties of the solution, there is a textbox where you enter the Date/Time which you wish to set the countdown timer. When I click 'OK' to submit the WebPart, I would like the date value in the textbox to be added to a List as a new List
item. I've got the code to add the List item (or what im think is the correct code) but what I cant do is get the function to execute when the WebPart 'OK' button is clicked. 
Now, I have downloaded the source code which is available but I cant fathom how to hook the 'Update List Item' code onto the onclick event of the button (as I cant find an onclick event!). Any help to advise me what to do would be appreciated.
My code to add the date to the new List:
// create item in Deadline Configuration List
using (SPSite oSiteCollection = new SPSite(SPContext.Current.Site.Url))
using (SPWeb oWeb = oSiteCollection.OpenWeb())
SPList oList = oWeb.Lists["DLConfig"];
SPListItem oListItem = oList.Items.Add();
oListItem["Title"] = "Deadline Date";
oListItem["TaskDueDate"] = new DateTime(WebPart.TargetDate.Year, WebPart.TargetDate.Month, WebPart.TargetDate.Day);
oWeb.AllowUnsafeUpdates = true;
oListItem.Update();
Original WebPart Code:
SPCountdownWebpart.cs
using System;
using System.ComponentModel;
using System.Web.UI.WebControls.WebParts;
namespace SPCountdown.SPCountdownWebPart
[ToolboxItemAttribute(false)]
public class SPCountdownWebPart : WebPart
// Visual Studio might automatically update this path when you change the Visual Web Part project item.
private const string _ascxPath = @"~/_CONTROLTEMPLATES/SPCountdown/SPCountdownWebPart/SPCountdownWebPartUserControl.ascx";
protected override void CreateChildControls()
var control = Page.LoadControl(_ascxPath);
if (control != null)
((SPCountdownWebPartUserControl)control).WebPart = this;
Controls.Add(control);
[Category("Countdown Settings"),
Personalizable(PersonalizationScope.Shared),
WebBrowsable(true),
WebDisplayName("Target Date/Time"),
WebDescription("Please enter the target date/time for countdown.")]
public DateTime TargetDate { get; set; }
SPCountdownWebpartUserControl.cs
using System;
using System.Web.UI;
using Microsoft.SharePoint;
namespace SPCountdown.SPCountdownWebPart
public partial class SPCountdownWebPartUserControl : UserControl
public SPCountdownWebPart WebPart { get; set; }
public SPCountdownWebPartUserControl()
PreRender += SPCountdownWebPartUserControl_PreRender;
void SPCountdownWebPartUserControl_PreRender(object sender, EventArgs e)
// parse date from properties
var targetDateString = string.Format("{0},{1},{2},{3},{4},{5}",
WebPart.TargetDate.Year,
WebPart.TargetDate.Month - 1, //uses 0-based index
WebPart.TargetDate.Day,
WebPart.TargetDate.Hour,
WebPart.TargetDate.Minute,
WebPart.TargetDate.Second);
// js sources
const string jqueryScript = "<script type='text/javascript' src='/_layouts/SPCountdown/js/jquery-1.10.2.min.js'></script>";
const string countdownScript = "<script type='text/javascript' src='/_layouts/SPCountdown/js/jquery.countdown.min.js'></script>";
// create javascript implementing countdown
const string jsCountdownFormat = "<script type='text/javascript'>$(function () {{var targetDate = new Date({0});$('#defaultCountdown').countdown({{until: targetDate}});}});</script>";
var jsCountdown = string.Format(jsCountdownFormat, targetDateString);
// register client scripts
var cs = Page.ClientScript;
if (!cs.IsClientScriptBlockRegistered("jQuery"))
cs.RegisterClientScriptBlock(
GetType(),
"jQuery",
jqueryScript);
if (!cs.IsClientScriptBlockRegistered("jsCountdownScript"))
cs.RegisterClientScriptBlock(
GetType(),
"jsCountdownScript",
countdownScript);
if (!cs.IsClientScriptBlockRegistered("jsCountdown"))
cs.RegisterClientScriptBlock(
GetType(),
"jsCountdown",
jsCountdown);
protected void Page_Load(object sender, EventArgs e)
Can anyone help me with where I need to implement my code to get the List Item to be created when the Web Part properties are set?
Thanks in advance.
Rick Lister
-=Stylus=-

Answer 1

Hi,
Please refer below link regarding web part custom properties,
I think you need to write code under ApplyChanges() Method.I am not sure. Just try it once.
http://sharepointkitchen.blogspot.in/2014/10/custom-web-part-properties-approach-2.html
Don't forget to mark it as an Answer if it resolves your problem or Vote Me if it useful.
Mahesh