To fix the problem you need to delete the CEWP in question.  If you can’t delete it through the web part’s menu because of the error simply navigate to the page’s web part maintenance page by adding ?contents=1 to the page URL.

using (SPWeb web = SPContext.Current.Web) {
  DateTime dtToday = DateTime.Now;
  DateTime regionDate = web.RegionalSettings.TimeZone.UTCToLocalTime(dtToday);
  DateTime completedDate = Convert.ToDateTime(SPUtility.FormatDate(web, regionDate,
    SPDateFormat.ISO8601));
}

During this initial upload I’ll usually turn off all settings which will do this automatic check out, and only turn them on once that process has completed. This is a list of settings that you need to configure for this:

• Select No for the ‘Require documents to be checked out before they can be edited?’ setting in Version Settings
• Make sure all columns that have Yes to ‘Require that this column contains information’ have a default value, else select No for the column in question.

http://blogs.msdn.com/sharepoint/archive/2009/01/29/spdisposecheck-released.aspx

One request I’ve had was the allow a weekly view of project tasks rather than the default daily view.  This can be achieved though writing CSS script such as Path To SharePoint explains, however the users want a button to toggle between a daily view and a weekly view depending on which project they are looking at. This can be achieved by inserting some Javascript into the page.

With the example below I’ve done this by utilising the jQuery javascript library:

<script src=”http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js” type=”text/javascript”></script>
<script>
$(function() {
var bt1=”<input id=’tlv0′ class=’ms-ButtonHeightWidth’ type=’button’ target=’_self’ value=’Toggle Daily/Weekly’ name=’togglelv’ style=’WIDTH: 140px’ />”;
$(“td.ms-toolbar[width='99%']“).append(bt1);
    $(“#tlv0″).toggle(
      function () {
        $(“table[class='ms-ganttInnerTable'] IMG”).css({“width”:”2px”});
        $(“.ms-ganttDetailTimeUnitRow”).css({“display”:”none”});
        $(“.ms-ganttMajorTimeUnitHeaderCell”).css({“writing-mode”:”tb-rl”,”filter”:”flipv fliph”,”border”:”0″});
      },
      function () {
        $(“table[class='ms-ganttInnerTable'] IMG”).css({“width”:”16px”});
        $(“.ms-ganttDetailTimeUnitRow”).css({“display”:”inline”});
        $(“.ms-ganttMajorTimeUnitHeaderCell”).css({“writing-mode”:”lr-tb”,”filter”:”none”,”border”:”0″});
      }
    );
  });
</script>

<UrlAction Url=”javascript:window.location= ‘{SiteUrl}/_layouts/TMGTaskTracker/FastClose.aspx?ItemId={ItemId}&amp;ListId={ListId}&amp;Source=’ + window.location”/>

A more detailed explanation along the same subject lines can be found at Jan Tielens’ blog.

To reference the list URL you need to use the FileDirRef field. Here’s some example code which includes logic that strips out the URL from the string that’s returned as it’s a Lookup field type:

query.ViewFields = @”<FieldRef Name=’FileDirRef’ Nullable=’TRUE’ />”;
urlValue = row["FileDirRef"].ToString().Substring(row["FileDirRef"].ToString().IndexOf(“#”) + 1);

http://www.microsoft.com/technet/security/bulletin/ms07-027.mspx

[assembly: AssemblyVersion("1.0.0.*")]
[assembly: AssemblyFileVersion("1.0.0.*")]

SPFieldDateTime dt = (SPFieldDateTime)list.Fields["Deadline"];

However the SPFieldDateTime field doesn’t have any of these methods. I needed to use the DateTime field type. If you try to change this code above to DateTime instead of SPFieldDateTime you’ll get the following error:

Cannot convert type ‘Microsoft.SharePoint.SPField’ to ‘System.DateTime’

To get around this you can pull the field directly out of the list using as it will be returned as an object and which you can then covert to a DateTime object.

DateTime dt = (DateTime)list["Deadline"];