<?xml version="1.0" encoding="utf-8" ?> <FieldTypes> <FieldType> <Field Name="TypeName">VisitorRecord</Field> <Field Name="ParentType">Text</Field> <Field Name="TypeDisplayName">浏览次数</Field> <Field Name="TypeShortDescription">每点击一次DispForm页,浏览次数+1</Field> <Field Name="UserCreatable">TRUE</Field> <Field Name="Sortable">TRUE</Field> <Field Name="AllowBaseTypeRendering">TRUE</Field> <Field Name="Filterable">TRUE</Field> <Field Name="FieldTypeClass">VisitorRecord.VisitorRecord,VisitorRecord, Version=1.0.0.0, Culture=neutral, PublicKeyToken=a3d395e8da16bea6</Field> <RenderPattern Name="DisplayPattern"> <Column/> </RenderPattern> </FieldType> </FieldTypes> |
class VisitorRecord : SPField { public VisitorRecord(SPFieldCollection fields, string fieldName) : base(fields, fieldName) { Init(); } public VisitorRecord(SPFieldCollection fields, string typeName, string displayName) : base(fields, typeName, displayName) { Init(); } void Init() { //设置在DisplayForm页显示 this.ShowInDisplayForm = true; //设置在EditFrom页不显示 this.ShowInEditForm = false; //在NewForm页不显示 this.ShowInNewForm = false; } public override BaseFieldControl FieldRenderingControl { get { BaseFieldControl vr1 = new VisitorRecordControl(); vr1.FieldName = this.InternalName; return vr1; } } } |
class VisitorRecordControl : BaseFieldControl { public void UpdateItemFieldValue() { try { 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; if (ItemFieldValue != null) item[this.FieldName] = (Convert.ToInt32(this.ItemFieldValue.ToString()) + 1).ToString(); else item[this.FieldName] = "1"; item.SystemUpdate(); web.AllowUnsafeUpdates = false; } } }); }catch{} } protected override void Render(System.Web.UI.HtmlTextWriter output) { if (this.ControlMode == SPControlMode.Display) { this.UpdateItemFieldValue(); if (this.ItemFieldValue != null) { output.Write(this.ItemFieldValue.ToString()); } else { output.Write("0"); } } } } |
单行文本 – SPFieldText 多行文本 – SPFieldMultiLineText 数字 – SPFieldNumber 货币 – SPFieldCurrency 是/否 – SPFieldBoolean 日期 - SPFieldDateTime 选项(单选) - SPFieldChoice |
//判断输入值的有效性 public override string GetValidatedString(object value) //重写字段默认值 public override string DefaultValue //该字段是否允许被爬网 public override bool NoCrawl //字段删除时执行的事件 public override void OnDeleting() //字段添加后执行的事件 public override void OnAdded() //字段更新后执行的事件 public override void OnUpdated() |
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