Exception while creating the sub web

Hello All,

I was facing an issue while creating the sub web under my current web, I was getting a security validation exception. So I am discussing here the problem and solution

Problem :

I was creating a sub web under my one of the web using following code and was redirecting to new web

//Reference to current web
SPWeb spWeb = SPContext.Current.Web;
//Getting all sub web collections
SPWebCollection spSubWebCollections = spWeb.Webs;
//current template
string currentTemplate = spWeb.WebTemplate;

string siteUrl = txtSiteURL.Text;
string siteTitle = txtSiteTitle.Text;
string siteDescreption = txtSiteDescreption.Text;

//creating sub web
SPWeb oNewWeb = spSubWebCollections.Add(siteUrl, siteTitle, siteDescreption, 1033, currentTemplate, false, false);

Response.Redirect(oNewWeb.Url);

But I couldnt create new sub web, because I was getting the following error



Which is :

"The security validation for this page is invalid. Click Back in your Web browser, refresh the page, and try your operation again. at Microsoft.SharePoint.Library.SPRequestInternalClass.CreateWeb(String bstrUrl, String bstrTitle, String bstrDescription, UInt32 nLCID, String bstrWebTemplate, Boolean bCreateUniqueWeb, Boolean bConvertIfThere, Guid& pgWebId, Guid& pgRootFolderId, Boolean bCreateSystemCatalogs) at Microsoft.SharePoint.Library.SPRequest.CreateWeb(String bstrUrl, String bstrTitle, String bstrDescription, UInt32 nLCID, String bstrWebTemplate, Boolean bCreateUniqueWeb, Boolean bConvertIfThere, Guid& pgWebId, Guid& pgRootFolderId, Boolean bCreateSystemCatalogs)"

Solution :

This error is because FormDiagest web control is missing on my page. So I have added the FormDigest web control on my page and it worked.

<SharePoint:FormDigest runat="server" />

FormDigest control inserts the security validation on the page.

Following is the referral link for the FormDigest control

http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.webcontrols.formdigest.aspx