在SharePoint中创建自定义EditorPart

Question

在ApplyChanges之前调用CreateChildControls方法。我将编辑后的属性值设置为我的Web部件，但它们总是以其默认值结束。

public Guid SelectedUId 
    { 
     get 
     { 
      if (_ddlList == null) 
      { 
       return Guid.Empty; 
      } 

      return new Guid(_ddlList.SelectedValue); 
     } 
    } 

    internal EditableLookupTableMatcher(string id) 
    { 
     this.Title = "Lookup Table Matcher"; 
     this.ID = string.Concat("LookupTableMatcher", "_", id); 
    } 

    protected override void CreateChildControls() 
    { 
     Controls.Clear(); 

     _ddlList = new DropDownList(); 
     _ddlList.ID = "ddlLts"; 

     _ddlList.DataTextField = "Value"; 
     _ddlList.DataValueField = "Key"; 

     Controls.Add(_ddlList); 
    } 

    protected override void OnPreRender(System.EventArgs e) 
    { 
     base.OnPreRender(e); 

     _ddlList.DataSource = DataSource; 
     _ddlList.DataBind(); 
    } 

    protected override void RenderContents(System.Web.UI.HtmlTextWriter writer) 
    { 
     writer.Write(LookupTableName); 
     writer.WriteBreak(); 

     _ddlList.RenderControl(writer); 
     writer.WriteBreak(); 
    } 

    public override bool ApplyChanges() 
    { 
     EnsureChildControls(); 
     var editedWebPart = WebPartToEdit as IReportFilterLookupMatches; 

     if (editedWebPart == null) 
     { 
      return false; 
     } 

     SetValue(editedWebPart, LookupTableName, SelectedUId.ToString()); 

     return true; 
    } 

    public override void SyncChanges() 
    { 
     EnsureChildControls(); 

     var editedWebPart = WebPartToEdit as IReportFilterLookupMatches; 

     if (editedWebPart == null) 
     { 
      return; 
     } 

     var UId = GetValue(editedWebPart, LookupTableName); 
     for (var i=0; i < _ddlList.Items.Count; i++) 
     { 
      if (_ddlList.Items[i].Value == UId) 
      { 
       _ddlList.Items[i].Selected = true; 

       break; 
      } 
     } 
    } 

    /// <summary> 
    /// Gets the value of one property of an instance of type <see cref="IReportFilterLookupMatches"/> the editor is configured for. 
    /// </summary> 
    public static string GetValue(IReportFilterLookupMatches lookupMatches, string propertyName) 
    { 
     Guard.AgainstNull(lookupMatches, "lookupMatches"); 
     Guard.AgainstNullOrEmpty(propertyName, "propertyName"); 

     switch (propertyName) 
     { 
      case ReportFilterConstants.BUSINESS_HIERARCHY: 
       return lookupMatches.BusinessHierarchyUId; 

      case ReportFilterConstants.OPORTUNITY_STATUS: 
       return lookupMatches.OpportunityStatusesUId; 

      case ReportFilterConstants.REGION: 
       return lookupMatches.RegionUId; 

      case ReportFilterConstants.SPENDING: 
       return lookupMatches.SpendTypeUId; 

      case ReportFilterConstants.OPERATING_UNIT: 
       return lookupMatches.OperatingUnitUId; 
     } 

     throw new InvalidOperationException(string.Format("The <{0}> property name is not configured in the LookupMatchesPropertyAdapter.")); 
    } 

    /// <summary> 
    /// Sets the value of one property of an instance of type <see cref="IReportFilterLookupMatches"/> rhe editor is configured for. 
    /// </summary> 
    private IReportFilterLookupMatches SetValue(IReportFilterLookupMatches lookupMatches, string propertyName, string value) 
    { 
     Guard.AgainstNull(lookupMatches, "lookupMatches"); 
     Guard.AgainstNullOrEmpty(propertyName, "propertyName"); 

     switch (propertyName) 
     { 
      case ReportFilterConstants.BUSINESS_HIERARCHY: 
       lookupMatches.BusinessHierarchyUId = value; 
       break; 

      case ReportFilterConstants.OPORTUNITY_STATUS: 
       lookupMatches.OpportunityStatusesUId = value; 
       break; 

      case ReportFilterConstants.REGION: 
       lookupMatches.RegionUId = value; 
       break; 

      case ReportFilterConstants.SPENDING: 
       lookupMatches.SpendTypeUId = value; 
       break; 

      case ReportFilterConstants.OPERATING_UNIT: 
       lookupMatches.OperatingUnitUId = value; 
       break; 
     } 

     return lookupMatches; 
    } 

我知道这应该是简单而直接的，但是这一直暗指着我现在的路。

Answer 1

你的功能

SetValue(editedWebPart, LookupTableName, SelectedUId.ToString()); 

修改editedWebPart的实例，你应该把它作为像这样

SetValue(ref editedWebPart, LookupTableName, SelectedUId.ToString()); 

参考