如何将Droplink链接到Sitecore中的树列表 [英] How to link a droplink to a Treelist in Sitecore

问题描述

我试图弄清楚如何将 Droplink 链接到树列表中的选定项目。
我有一个字段主题，它是 Treelist ，一个字段 MasterTheme ，即 Droplink 。

I'm trying to figure out how I can link a Droplink to the selected items in a Treelist. I have a field Theme, which is the Treelist, and a field MasterTheme, which is the Droplink.

我应该能够在 Droplink 中选择一个主主题，其中填充了从中选择的数据树列表。

I should be able to select a master-theme in the Droplink, which is filled with the selected data from the Treelist.

我对Sitecore来说还很陌生，而且我对自定义类也不熟悉。

I'm pretty new to Sitecore, and I'm not familiar with Custom classes.

推荐答案

为此，您可以使用 getLookupSourceItems 管道。使用 Droplink ，您可以将Sitecore查询指定为源。使用 getLookupSourceItems ，您可以在运行时更改源。以下处理器检查树列表中选择的项目，并创建一个Sitecore查询，其中包括树列表中选择的所有项目。

You can use the getLookupSourceItems-pipeline for this. With a Droplink you can specify a Sitecore query as source. And with the getLookupSourceItems you can change the source at runtime. The following processor checks the items selected in the Treelist and create a Sitecore query which includes all the items selected in the Treelist.

public class LookupItemsFromField
{
    private const string FromFieldParam = "fromfield";

    public void Process(GetLookupSourceItemsArgs args)
    {
        // check if "fromfield" is available in the source
        if (!args.Source.Contains(FromFieldParam))
        {
            return;
        }

        // get the field
        var parameters = Sitecore.Web.WebUtil.ParseUrlParameters(args.Source);
        var fieldName = parameters[FromFieldParam];

        // set the source to a query with all items from the other field included
        var items = args.Item[fieldName].Split('|');
        args.Source = this.GetDataSource(items);
    }

    private string GetDataSource(IList<string> items)
    {
        if (!items.Any()) return string.Empty;

        var query = items.Aggregate(string.Empty, (current, itemId) => current + string.Format(" or @@id='{0}'", itemId));
        return string.Format("query://*[{0}]", query.Substring(" or ".Length));
    }
}

您必须指定哪个字段是源 Droplink 源中的字段与 fromfield =< SourceField> ：

You have to specify which field is your "Source" field within the Droplink source with fromfield=<SourceField>:

在最后，您需要配置此管道处理器：

At the end you need to configure this pipeline processor:

<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
  <sitecore>
    <pipelines>
      <getLookupSourceItems>
        <processor  patch:before="processor[1]"
                    type="Website.LookupItemsFromField, Website" />
      </getLookupSourceItems>
    </pipelines>
  </sitecore>
</configuration>

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