Sharepoint Development

Question

hello i have a list in my sharepoint and i would like to extend it with a new field how do i create a new Field Type

Roei Bar · Answer

in order to get an additional field you need to edit the C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\TEMPLATE\XML\FLDTYPES.XML the file lookes like this Related Categories Field Note Related Categories Field My Description TRUE TRUE TRUE TRUE TRUE blabla.SharePoint.CustomFields.RelatedCategoriesField RealCommerce.SharePoint.CustomFields Version=1.0.0.0 Culture=neutral PublicKeyToken=109625d57bdfbe68 this section : blabla.SharePoint.CustomFields.RelatedCategoriesField RealCommerce.SharePoint.CustomFields Version=1.0.0.0 Culture=neutral PublicKeyToken=109625d57bdfbe68 refers to the FieldClass that you need to build in this manner: namespace Blabla.SharePoint.CustomFields { /// /// public class RelatedCategoriesField : SPFieldMultiLineText { public RelatedCategoriesField(SPFieldCollection fields string fieldName) : base(fields fieldName) { } public RelatedCategoriesField(SPFieldCollection fields string typeName string displayName) : base(fields typeName displayName) { } public override BaseFieldControl FieldRenderingControl { get { BaseFieldControl fldControl = new RelatedCategoriesFieldControl(); fldControl.FieldName = InternalName; return fldControl; } } } } and the FieldControl: namespace BlaBla.SharePoint.CustomFields { public class RelatedCategoriesFieldControl : AjaxBaseFieldControl { #region Members protected RelatedCategoriesUC m_RelatedCategoriesUC; protected ResourceMgr m_Resource; #endregion #region Properties public ResourceMgr oResource { get { if (m_Resource == null) { m_Resource = new ResourceMgr(ResourceMgr.ResourceFiles.CmsResources); } return m_Resource; } } public override object Value { get { return m_RelatedCategoriesUC.Value; } set { m_RelatedCategoriesUC.Value = value; } } #endregion #region Events protected override void OnInit(EventArgs e) { base.OnInit(e); // In This Case we load a UserControl m_RelatedCategoriesUC = Page.LoadControl(~/_CONTROLTEMPLATES/CustomField/RelatedCategoriesUC.ascx) as RelatedCategoriesUC; m_RelatedCategoriesUC.IsRequired = this.Field.Required; } protected override void CreateChildControls() { base.CreateChildControls(); //load the usercontrol this.Controls.Add(m_RelatedCategoriesUC); } /// /// if the field is required /// Make sure that at least one site was choosen /// by calling function Validate in the UserControl /// public override void Validate() { bool bIsValid = this.IsValid; if (this.ControlMode == SPControlMode.Display) { return; } base.Validate(); if (this.IsValid && this.Field != null && this.Field.Required) { //if the field is required call function Validate in the usercontrol //to make sure that the field is filled bIsValid = this.m_RelatedCategoriesUC.Validate(); } if (bIsValid == false) { //field is not valid this.IsValid = false; //Init ErrorMessage from Rescource this.ErrorMessage = oResource.GetValue(RequiredField_ChooseSite); } else { // The field is not empty or not required. // The data is valid. } } /// /// special care for display mode /// show urls and sequences if exisiting /// (the field is not required so there can be no selections) /// /// protected override void RenderFieldForDisplay(System.Web.UI.HtmlTextWriter output) { RelatedCategoriesFieldValue oRelatedCategoriesFieldValue; string sHtml; if (this.ItemFieldValue != null) { //there is a selection- render it by calling function RenderFieldForDisplay of RelatedCategoriesUC sHtml = m_RelatedCategoriesUC.RenderFieldForDisplay(this.ItemFieldValue.ToString()); output.Write(sHtml); } else { //no selection output.Write(none); } } #endregion } } Hope This Helps

Ahmad Tibi · Answer

WOW.... thats what i call a post :-)