Issue: Detected use of SPRequest for previously closed SPWeb object

Question

I have a solution to create web site by a custom web template. I used ULS Viewer to monitor the sharepoint error log during the process. I see some unexpected error(Detected use of SPRequest for previously closed SPWeb object.  Please close SPWeb
objects when you are done with all objects obtained from them, but not before.)
I believe that It will bring up a memory leak issue in anytime future. so I spend some time to find the root cause. It has no unexpected issue by creating web site with out of the box template(BLOG,WIKI, etc). I will get only get it with custom
template. Does anyone know the reason and soltuon for this issue? Thanks.

Answer 1

        protected void Button2_Click(object sender, EventArgs e)
            string Client = "Client";
            string creatorId = "UserId";
            string creatorname = "Robin Hung";
            string rreatorEmail = "[email protected]";
            SPSecurity.RunWithElevatedPrivileges(delegate()
using (
SPSite newSite =
new SPSite("http://localhost/sites/" + Client))
SPWebTemplateCollection WTC =
newSite.GetWebTemplates(1033);
SPWebTemplate webTemplate =
newSite.GetWebTemplates(1033)["SubSite"];
newSite.AllowUnsafeUpdates = true;
SPDiagnosticsService.Local.WriteTrace(0,
new SPDiagnosticsCategory
("Log",
TraceSeverity.
Verbose,
EventSeverity.
Verbose),
TraceSeverity.Verbose,
"Test 2", "Called");
using (SPWeb spWeb = newSite.OpenWeb())
SPDiagnosticsService.Local.WriteTrace(0,
new SPDiagnosticsCategory
("Log",
TraceSeverity
.Verbose,
EventSeverity
.Verbose),
TraceSeverity.
Verbose,
"Test 21",
"Called");
spWeb.AllowUnsafeUpdates = true;
spWeb.Webs.Add("Robin4", "Robin2", "test", 1033,
webTemplate, false, false);
SPDiagnosticsService.Local.WriteTrace(0,
new SPDiagnosticsCategory
("Log",
TraceSeverity
.Verbose,
EventSeverity
.Verbose),
TraceSeverity.
Verbose,
"Test 211",
"Called");
spWeb.Webs.Add("Robin5", "Robin2", "test", 1033,
WTC["SubSite"], false, false);
SPDiagnosticsService.Local.WriteTrace(0,
new SPDiagnosticsCategory
("Log",
TraceSeverity
.Verbose,
EventSeverity
.Verbose),
TraceSeverity.
Verbose,
"Test 212",
"Called");
spWeb.Webs.Add("Robin6", "Robin2", "test", 1033,
WTC[30], false, false);
SPDiagnosticsService.Local.WriteTrace(0,
new SPDiagnosticsCategory
("Log",
TraceSeverity
.Verbose,
EventSeverity
.Verbose),
TraceSeverity.
Verbose,
"Test 213",
"Called");
spWeb.AllowUnsafeUpdates = false;
SPDiagnosticsService.Local.WriteTrace(0,
new SPDiagnosticsCategory
("Log",
TraceSeverity
.Verbose,
EventSeverity
.Verbose),
TraceSeverity.
Verbose,
"Test 22",
"Called");
newSite.AllowUnsafeUpdates = false;
//currentSite.AllowUnsafeUpdates = false;
SPDiagnosticsService.Local.WriteTrace(0,
new SPDiagnosticsCategory
("Log",
TraceSeverity.
Verbose,
EventSeverity.
Verbose),
TraceSeverity.Verbose,
"Test 4", "Called");