October 3, 2022

Samir Daoudi's Technical Blog

SharePoint, Office 365, C#, .Net, SQL Server News, Tips, Ebooks, Events, Webinars ….etc

Add List Item in SharePoint Online using ASP.net and C#

In this article, I will describe how you can send data from an ASP.net (web form) application to SharePoint Online custom list.

The scenario of this request, was that a client wanted to have an internet facing (without opening its SharePoint to the public) public form. So I suggested using Windows Azure to deploy a .Net Application (ASP.net and C#) which people can access (anonymously), submit the data, and get the data sent across to a Sharepoint List.

Here are the simple steps to follow:

1- Create you form with ASP.net

I used BootStrap Framework along side to ASP.net, HTML and CSS3.

2- Download ‘SharePoint Online Client Components SDK’

Download Link

3- Include the required references

You need to reference the following:


4- The Magic !!

Assuming that you do you proper data validation and fancy animations 🙂 (Optional), you need to run the following code in you submit event (or button).

#region Connexion to SharePoint
string WebUrl = "https://You.sharepoint.com/sites/ABC/";
string login = "**********";
string password = "**********";
var securePassword = new SecureString();
foreach (char c in password)
var onlineCredentials = new SharePointOnlineCredentials(login, securePassword);

#region Insert the data
using (ClientContext CContext = new ClientContext(WebUrl))
CContext.Credentials = onlineCredentials;
List announcementsList = CContext.Web.Lists.GetByTitle("Supply GateWay");
ListItemCreationInformation itemCreateInfo = new ListItemCreationInformation();
Microsoft.SharePoint.Client.ListItem newItem = announcementsList.AddItem(itemCreateInfo);
newItem["Title"] = C_Name.Value;
newItem["Address"] = C_Address.Value;

Leave a comment

You may have missed

Show Buttons
Hide Buttons

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

%d bloggers like this: