Updating a List Item programmatically

Introduction:

In this article I am going to explain you how to update list item programmatically .
Also I will explain you that How to “update content type of list item programmatically” which is little tricky.

The Code:

Update List Item metadata:-

Get the SPListeItem object and update metdata. At lst never forget to use “SPListItem.update()”.
See sample code below:-

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using(SPSite oSite = new SPSite("site url"))
{
	using(SPWeb oWebsite = oSite.OpenWeb())
	{
		SPList oList = oWebsite.Lists["Tasks"];
		SPListItem oListItem = oList.Items[5];
		oListItem["Title"] = "Some Title";
		oListItem.Update();// without this line item will not update
	}
}


Update List Item content type:-

Trick:- To update content type of list item, we need to assign content type id rather than content type name.

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using(SPSite oSite = new SPSite("site url"))
{
	using(SPWeb oWebsite = oSite.OpenWeb())
	{
		string cTypeName = "NewContentType";
		SPList oList = oWebsite.Lists["Tasks"];
		// get content type id
		SPContentType spCType = oList.ContentTypes[cTypeName];
		SPListItem oListItem = oList.Items[5];
 
		// below line will not update content type
		// oListItem["ContentType"] = “NewContentType”;
 
		// Correct implementation to apply new content type
		oListItem["ContentTypeId"] = spCType.Id.ToString();
		oListItem.Update();
	}
}

You may also like below article:-

how to delete items from sharepoint list programmatically
how to add items from sharepoint list programmatically
Get sharepoint list item programmatically

Thanks!
Avinash

calendarMarch 27, 2012 В· cardInfoyen В· comments2 Comments
tagTags: , , ,  В· Posted in: List, MOSS, SharePoint

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