IsDocumentWritable

 

Nintex Workflow has a fairly useful function "IsDocumentWritable" that checks if the current item that the workflow is running on is writable.

There is a small problem, it only checks if the file is Checked Out (SPFile.CheckedOutType) and not if the file was locked, say by a Desktop Client Application.

 

Add Nintex Workflow Inline Function

We can add a simple Nintex Workflow inline function to get the behaviour we wanted:

I followed Vadim's excellent blog entry: http://www.vadimtabakman.com/nintex-workflow-developing-a-custom-inline-function.aspx

 

/*
* & 'C:\Program Files\Nintex\Nintex Workflow 2010\NWAdmin.exe' -o AddInlineFunction -functionalias "fn-IsFileLocked" -assembly "MY_DLL, Version=1.0.0.0, Culture=neutral, PublicKeyToken=9f7c41d4a6ea1fb3" -namespace "MYNamespace" -typename "MYInlineFunctions" -method "IsFileLocked" -description "Checks if file is locked." -usage "fn-IsFileLocked(itemPath)"
*/

public static bool IsFileLocked(string itemPath)
{
    bool result = false;
    try
    {
        SPSecurity.RunWithElevatedPrivileges(() =>
        {

            using (SPSite site = new SPSite(itemPath))
            {
                using (SPWeb web = site.OpenWeb())
                {
                    SPFile file = web.GetFile(itemPath);
                    if (!file.Exists)
                    {
                        return;
                    }

                    // true if checked out

                    result = file.LockType != SPFile.SPLockType.None;
                    return;
                }
            }
        });
    }
    catch (Exception ex)
    {
    }
    return result;
}

 

You can call this method from within Nintex Workflow Designer.