Have you ever tried to remove a property from a SPWeb object and after applying the update, when you next check for the property it is still there?<\/p>\n
Logically, you’d think the following code would do this for you:<\/p>\n
\r\nwebObject.Properties.Remove(\"yourkey\");\r\nwebObject.Properties.Update();\r\n<\/pre>\nBut, I’ve found, if you reload the SPWeb object and check for the key, it still exists, even though it had been previously removed. To successfully remove a property from the web’s property bag, try setting the property to null, as shown below.<\/p>\n
\r\nwebObject.Properties[\"yourkey\"] = null;\r\nwebObject.Properties.Update();\r\n<\/pre>\nNow when you reload the SPWeb object and check for the property, it won’t exist. It seems that the Remove<\/em> method is either flaky, or the change is not being persisted after applying the update on the Properties<\/em> property.<\/p>\nOf course, you really should be using the new AllProperties<\/em> property instead, where this issue is not present. This property was added to 2010 and uses a HashTable instead of the SPPropertyBag. Items added to AllProperties<\/em> will filter down to Properties<\/em> but not the reverse. Most (if not all) of the internal properties use the old Properties<\/em> property, so there are still certain cases where you’d want to manipulate them. How you work with them is slightly different, for example:<\/p>\n\r\n\/\/ Remove from old style Properties\r\nwebObject.Properties[\"yourkey\"] = null;\r\nwebObject.Properties.Update();\r\n\r\n\/\/ Remove from new AllProperties\r\nwebObject.AllProperties.Remove(\"yourkey\");\r\nwebObject.Update();\r\n<\/pre>\nNothing too different, instead of updating the property collection directly you you just update the parent web or site object.<\/p>\n","protected":false},"excerpt":{"rendered":"
Have you ever tried to remove a property from a SPWeb object and after applying the update, when you next check for the property it is still there? Logically, you’d think the following code would do this for you: webObject.Properties.Remove(“yourkey”); … Continue reading