.NET Graph SDK 更新 Sharepoint Online 列表项值

.NET Graph SDK Updating Sharepoint Online List Item Values

我试图在将列表项上传到列表后向列表项的自定义列添加值。我可以将项目放入列表中,我可以查询列表并取回项目的数据,但是当我尝试为额外字段添加数据时,出现以下 Microsoft.SharePoint.Client.InvalidClientQueryException 错误:

A value without a type name was found and no expected type is available. When the model is specified, each value in the payload must have a type which can be either specified in the payload, explicitly by the caller or implicitly inferred from the parent value.

我不确定错误消息指的是什么值或模型。这是我的代码:

var item = await graphClient
    .Drives[driveId]
    .Root.ItemWithPath(fileName)
    .ListItem.Request()
    .Select("WebURL,Fields,SharepointIds")
    .Expand("Fields")
    .GetAsync();

var fieldVals = await graphClient
    .Sites[SPUrl + ":"]
    .Sites[SpPath + ":"]
    .Lists[libId]
    .Items[item.SharepointIds.ListItemId]
    .Fields
    .Request()
    .GetAsync();

fieldVals.AdditionalData.Add("Phase",
    JsonConvert.SerializeObject(tags));

await graphClient
    .Drives[driveId]
    .Root
    .ItemWithPath(fileName)
    .ListItem
    .Fields
    .Request()
    .UpdateAsync(fieldVals);

最初,当我在做 fieldVals.AdditionalData.Add() 时,我有 "Phase" 和一个 List(string),这导致了关于未设置 OData 字段类型的错误,但我没有在说明预期 OData 字段值是什么的文档。我尝试将其设置为 microsoft.graph.fieldValueSet,但没有用。

我正在尝试更新允许多个选项作为复选框的选择列。

对于多选字段类型,确实,odata.type注释的存在在请求负载中是强制,这里是如何指定它的示例:

PATCH https://graph.microsoft.com/v1.0/sites/{site-id}/lists/{list-id}/items/{item-id}/


{
  "fields": {
    "<ChoiceFieldName>@odata.type": "Collection(Edm.String)",
    "<ChoiceFieldName>":["<val1>","<val2>"]
  }
}

哪里

  • ChoiceFieldName - 选择字段名称
  • val1val2 - 字段值

例子

假设一个列表包含一个名为Categories的选择字段,那么下面的例子演示了如何通过msgraph-sdk-dotnet更新列表项:

var choiceVals = new []{ "Cat1", "Cat2"};

await graphClient.Sites[siteId].Lists[listId].Items[itemId].Request().UpdateAsync(new ListItem()
{
      Fields = new FieldValueSet
      {
            AdditionalData = new Dictionary<string, object>
            {
                { "Categories@odata.type", "Collection(Edm.String)" },
                { "Categories", choiceVals }
            }
      }
 }); 

参考资料