The security validation for this page is
invalid. Click Back in your Web browser, refresh the page, and try your
operation again.
The above error will be thrown at the time of updating Library or Lists items due to authentication problem, or We didn’t have the rights to update the items.
By using the follwoing code, We can overcome this issue,
Web.AllowUnsafeUpdates = true;
item["Title"]=”Sample”;
item.Update();
or we can also use the follwoing code to overcome the above error, this will affect the WebApplication. This will change the Security settings of a Web Application to allow the anonymous user to update item.
web.Site.WebApplication.FormDigestSettings.Enabled = false;
item["Title"]=”Sample”;
item.Update();
web.Site.WebApplication.FormDigestSettings.Enabled = true;
or we can change the settings in Central Administration to anonymously update the items. But this method will be dangerous.
The above error will be thrown at the time of updating Library or Lists items due to authentication problem, or We didn’t have the rights to update the items.
By using the follwoing code, We can overcome this issue,
Web.AllowUnsafeUpdates = true;
item["Title"]=”Sample”;
item.Update();
or we can also use the follwoing code to overcome the above error, this will affect the WebApplication. This will change the Security settings of a Web Application to allow the anonymous user to update item.
web.Site.WebApplication.FormDigestSettings.Enabled = false;
item["Title"]=”Sample”;
item.Update();
web.Site.WebApplication.FormDigestSettings.Enabled = true;
or we can change the settings in Central Administration to anonymously update the items. But this method will be dangerous.
- Central Administration > Application Management > Web Application General Settings
- Choose the WebApplication to overwrite the settings
- Select the option Off in Web Page Security Validation as follows,
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