SPContext.Current
// root site – eg. Web App url
string rootSiteCollectionURL = SPContext.Current.Web.Site.WebApplication.Sites[0].Url;
// site collection url
string SiteCollectionURL = SPContext.Current.Web.Site.Url;How to Create an Auto-Incrementing Number Field in a SharePoint List
Auto-numbering is a common requirement when working with SharePoint lists. You may want an auto-incrementing number on Issues list items such as “ISS-001” and so on. If you try using calculated column with ID field and entered a formula such as = (“ISS-00” & [ID]), this won’t work for new items! The reason being ID field is filled ONLY after the item is created. Here are the steps to create an auto-incrementing number field in a SharePoint list designer workflow: Create a new column, such as : Increment Number in issue list with Number type. Make this column hidden in a view. Create another column, such as : Issue No. in issue list with Formula type and add the following formula = “ISS-00” & [ Increment Number ]. This Column will show the increment items’ numbers in the list. Open SharePoint designer, create new list workflow (for issues list). Add a workflow action: “Update list Item” >> Current Item >> Add >> Set thi...
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