看到这篇文章 moss文档浏览次数统计 ，忍不住想到了这篇文章： WSS列表访问统计的实现 －－编写一个custom field,在render的时候读取字段值并判断加1写回，当然如果需要你也可以做成针对每个用户的统计以及防刷新等。
但里面的代码有bug－－权限提升有问题，对ListItem没修改权限的用户访问会出错。
修改后的完整代码如下：
ItemViewCounterField.cs：
public class ItemViewCounterField : SPField
{
public ItemViewCounterField(SPFieldCollection fields, string fieldName) : base( fields , fieldName )
{
Init();
} public ItemViewCounterField(SPFieldCollection fields, string typeName, string displayName) : base(fields, typeName, displayName) { Init(); } void Init() { //this.ReadOnlyField this.ShowInDisplayForm = true; this.ShowInEditForm = false; this.ShowInNewForm = false; } public override BaseFieldControl FieldRenderingControl { get { BaseFieldControl ctl = new ItemViewCounterFieldControl(); ctl.FieldName = this.InternalName; return ctl ; } }
}ItemViewCounterFieldControl.cs：
class ItemViewCounterFieldControl : BaseFieldControl { /// <summary> /// 更新字段 /// </summary> void UpdateWithElevatedPrivileges() { SPSecurity.RunWithElevatedPrivileges(delegate() { using (SPSite site = new SPSite(SPContext.Current.Site.ID)) { using (SPWeb web = site.OpenWeb(SPContext.Current.Web.ID)) { web.AllowUnsafeUpdates = true; SPList list = web.Lists[ this.ListId ]; SPListItem item = list.GetItemById(this.ItemId); if (item == null) return; item[this.FieldName] = this.ItemFieldValue; item.SystemUpdate(); } } } ); } protected override void Render(HtmlTextWriter output) { int cCounter; if (this.ItemFieldValue == null) { cCounter = 1; } else { cCounter = Convert.ToInt32(this.ItemFieldValue); cCounter++; } this.ItemFieldValue = cCounter.ToString(); this.UpdateWithElevatedPrivileges(); if (this.ItemFieldValue == null) output.Write("0"); else output.Write(this.ItemFieldValue.ToString()); } }
fldtypes_itemViewCounter.xml
