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SPSite.OpenWeb Method (String)

SharePoint 2010

Returns the Web site that is located at the specified server-relative or site-relative URL.

Namespace: Microsoft.SharePoint
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Available in Sandboxed Solutions: Yes
Available in SharePoint Online

Syntax

[ClientCallableExceptionConstraintAttribute(FixedId = "System.ArgumentException$0", ErrorType = typeof(ArgumentException), 
	ErrorCode = , Condition = "The specified Url MUST be a valid web url.")]
[ClientCallableMethodAttribute(ReturnObjectIdentity = true, CacheReturnValue = true, 
	CaseInsensitiveCache = true)]
public SPWeb OpenWeb(
	string strUrl
)

Parameters

strUrl: Type: System.String
A string that contains either the server-relative or site-relative URL of the Web site or of an object within the Web site. A server-relative URL begins with a forward slash ("/"), while a site-relative URL does not begin with a forward slash.

Return Value

Type: Microsoft.SharePoint.SPWeb
An SPWeb object that represents the Web site.

Remarks

If a site-relative URL is passed to the OpenWeb method, the URL is relative to the highest-level Web site that is represented in the URL that is passed to an SPSite constructor. For example, assume that the following sites exist in the SharePoint Foundation deployment:

http://Server/Subsite1/Subsite2
http://Server/sites/SiteCollection/Subsite3

The following table shows the results of passing various URLs to an SPSite constructor and the OpenWeb method.

SPSite Constructor	OpenWeb Method	Site Returned
http://Server/Folder/File	There is no parameter (OpenWeb method overload)	http://Server
http://Server/Subsite1/Subsite2/Folder/File	There is no parameter (OpenWeb method overload)	http://Server/Subsite1/Subsite2
http://Server/Subsite1/Subsite2/Folder/File	/	http://Server
http://Server/Subsite1/Subsite2/Folder/File	/Subsite1	http://Server/Subsite1
http://Server/Folder/File	Subsite1/Subsite2	http://Server/Subsite1/Subsite2
http://Server/Folder/File	/SiteCollection/Subsite3	Error: There is no site named /SiteCollection/Subsite3
http://Server/Folder/File	/Subsite4	Error: There is no site named /Subsite4
http://Server/sites/SiteCollection/Subsite3/Folder/File	No parameter (OpenWeb method overload)	http://Server/sites/SiteCollection/Subsite3
http://Server/sites/SiteCollection/Folder/File	/sites/SiteCollection/Subsite3	http://Server/sites/SiteCollection/Subsite3
http://Server/sites/SiteCollection/Folder/File	Subsite3	http://Server/sites/SiteCollection/Subsite3
http://Server/sites/SiteCollection/Folder/File	/	Error: Invalid URL
http://Server/sites/SiteCollection/Subsite3/Folder/File	/sites/SiteCollection	http://Server/sites/SiteCollection

For information about the forms of URLs that are used in SharePoint Foundation, see Describing Forms of URL Strings.

Examples

The following code example displays the URL for a specified Web site in a console application using a site-relative URL for the OpenWeb method. The example assumes the existence of a Web site located at http://MyServer/MyWebSite/MySubSite.

string strUrl = "http://MyServer/MyWebSite/Lists/Announcements/AllItems.aspx";

using (SPSite oSiteCollection = new SPSite(strUrl))
{
    using(SPWeb oWebsite = oSiteCollection.OpenWeb("MyWebSite/MySubSite"))
    {
        Console.WriteLine("Website: " + oWebsite.Url);
    }
}

Note
Certain objects implement the IDisposable interface, and you must avoid retaining these objects in memory after they are no longer needed. For information about good coding practices, see Disposing Objects.

Reference

SPSite Class

SPSite Members

OpenWeb Overload

Microsoft.SharePoint Namespace

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