Question

I’m using visual studio 2010 to code my web part.

I have a CheckBoxList which retrieve content from my SharePoint.

SPWeb objCurrentWeb;
SPList objStaffList;
objCurrentWeb = SPContext.Current.Web;

//Using SharePoint object model to retrieve both lists
objStaffList = objCurrentWeb.Lists["Staff List"];

foreach (SPListItem objStaffListItem in objStaffList.Items)
{
    staffList.Items.Add(Convert.ToString(objStaffListItem["Name"]));
    break;
}

I have another Button on this webpart to retrieve the DateTimeControl. When ever I press the Button, the above list will add duplicate items in my CheckBoxList.

How do I make it such a way that it will not add items into staffList?

Answer 1

In the protected void Page_Load(object sender, EventArgs e) method use if (!IsPostBack){}
and write your check box list populating code inside the brackets.