.NET Graph SDK 更新 Sharepoint 在线列表项值

I'm trying to add values to a custom column on a list item after uploading the list item to the list. I can get the item into the list, and I can query the list and get back the item's data, but when I try to add the data for the extra field I get the following Microsoft.SharePoint.Client.InvalidClientQueryException error:

找到了没有类型名称的值，并且没有可用的预期类型.指定模型时，有效负载中的每个值都必须具有一个类型，该类型可以是在有效负载中指定，由调用者显式指定或从父值隐式推断.

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.

我不确定错误消息所指的值或模型.这是我的代码:

I'm not sure what value or model the error message is referring to. This is my code:

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t 在说明预期 OData 字段值的文档中的任何地方都可以找到.我尝试将其设置为 microsoft.graph.fieldValueSet 但这不起作用.

Originally when I was doing fieldVals.AdditionalData.Add() I had "Phase" and a List(string) and that caused an error about the OData field type not being set but I haven't found anywhere in the documentation that says what expected OData field values are. I tried setting it to microsoft.graph.fieldValueSet but that didn't work.

我正在尝试更新允许多个选项作为复选框的选择列.

I'm trying to update a Choice column that allows multiple choices as checkboxes.

推荐答案

对于多选字段类型，确实，odata.type注解的存在就是mandatory 在请求负载中，这里是一个如何指定它的示例:

For multi-choice field type, indeed, the presence of odata.type annotation is mandatory in request payload, here is an example how to specify it:

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>"]
  }
}

在哪里

• ChoiceFieldName - 选择字段名称
• val1, val2 - 字段值

• ChoiceFieldName - choice field name
• val1, val2 - field values

示例

假设一个 List 包含一个名为 Categories 的选择字段，那么下面的示例演示如何通过 msgraph-sdk-dotnet:

Assuming a List contains a choice field named Categories, then the following example demonstrates how to update list item via msgraph-sdk-dotnet:

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 }
            }
      }
 }); 

参考文献

• 更新列表中的项目
• 实体数据模型:原始数据类型

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