How do you programmatically update a date field?

Question

I try to set field in template of type "Date" programmatically,

string postedValue = GetValue(formSubmitContext.Fields.FirstOrDefault(f => f.Name.Equals(fieldName)));
DateField dateField = newItem.Fields[fieldName];
var ss  = Sitecore.DateUtil.ToIsoDate(DateTime.Parse(postedValue));
dateField.Value = ss; 

When I debug the field is set with ISO value but in Sitecore the field is empty. any idea ??

Answer 1

You don't set the field value, you set the field.

newItem.Editing.BeginEdit();

string postedValue = GetValue(formSubmitContext.Fields.FirstOrDefault(f => f.Name.Equals(fieldName)));
var ss  = Sitecore.DateUtil.ToIsoDate(DateTime.Parse(postedValue));
newItem[fieldName] = ss; 

newItem.Editing.EndEdit();

Answer 2

you should use this construct:

item.Editing.BeginEdit();
make your changes
item.Editing.EndEdit();

or use the Editingcontext

using(new EditContext(item))
{
    item["FieldName"] = "A new value";
}

keep in mind there is also BulkEdititngContext(if you dont want to exp editor to reload)

Answer 3

You can update field as per sample code here we are using Editing class.

Note: Don't use EditContext if you have multiple operations and anyone failed then also it partially save data.Where Editing class will work just like a transaction, so if any operation will fail it'll rollback all operations.

Item item;
item.Editing.BeginEdit();
{
    //update field value ex- date value
    item["FieldA"] = "";    
}
item.Editing.EndEdit();