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Unknown server tag means that when parsing the site page the tag wpns0:TestVisualWebPartACE So via SharePoint designer Check the top of your site page that its register tag and make sure that the tag prefix is the same that used in your visual web part. For examble : <%@ Register Tagprefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages" ...


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Try to add WebDisplayName("your field name") and make sure that the final code look like this [WebBrowsable(true), WebDisplayName("Project ID"), WebDescription("Enter Project Number"), Personalizable(PersonalizationScope.Shared), Category("Project Settings")] public string ProjectID { get; set; } also, you can check the detail steps in this article ...


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You can use SharePoint modal popup dialog: Create one page in the pages library >> add your custom contact us web part on that page >> (from the page on which you want to open the popup) on button click event open this page in popup. Here are some references which will help to develop this popup: Open a page in a SharePoint modal window http://www....


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Turns out that web application has a setting that can be controlled through Powershell $web = Get-SPWebApplication "http://mywebapp..." $web.FormDigestSettings.TimeOut This is by default 30 minutes and SharePoint Viewstate cache is cleared after FormDigestSettings.TimeOut +1 (i.e. 31 minutes) $web.FormDigestSettings.TimeOut = New-TimeSpan -Hours 1 -...



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