将字段添加到特定位置的内容类型

Question

下面的代码工作得很完美，但是我需要新字段位于第5个位置，而不是在表单末尾。

任何想法如何？

private void UpdateDossierContentType(SPWeb parentWeb) 
{ 
    SPList productList = parentWeb.Site.RootWeb.Lists["Product"]; 
    SPFieldLookup lookup = CreateLookupField("ProductNameLookup", "CustomGroup", 
      false, false, parentWeb.Site.RootWeb, 
      parentWeb.Site.RootWeb.Lists["Product"], 
      productList.Fields["Product Name"].InternalName); 
    LinkFieldToContentType(parentWeb.Site.RootWeb, "Dossier", (SPField)lookup); 

    //SPContentType dossierCT = productList.ContentTypes["Dossier"]; 
    //dossierCT.DeleteFieldRefFromContentType(parentWeb.Fields["Product"]); 
    //dossierCT.Update(); 
} 

public static void LinkFieldToContentType(SPWeb web, string contentType, SPField field) 
{ 
    SPContentType ct = web.ContentTypes[contentType]; 
    ct.FieldLinks.Add(new SPFieldLink(field)); 
    ct.Update(true); 
} 

public static SPFieldLookup CreateLookupField(string fieldName, string group, bool required, bool allowMultipleValues, SPWeb w, SPList lookupList, string lookupField) 
{ 
    w.Fields.AddLookup(fieldName, lookupList.ID, lookupList.ParentWeb.Site.RootWeb.ID, required); 
    SPFieldLookup lookup = (SPFieldLookup)w.Fields[fieldName]; 
    lookup.AllowMultipleValues = allowMultipleValues; 
    lookup.LookupField = lookupField; 
    lookup.Group = group; 
    lookup.Update(true); 
    return lookup; 
} 

Answer 1

使用ct.FieldLinks.Reorder(stringArrayOfInternalFieldNames)看到MSDN SPFieldLinkCollection.Reorder