使用Rest API调用更新SharePoint列表项的C#代码

using System;
using System.Net;
using System.IO;

string siteUrl = "https://your-sharepoint-site-url";
string listName = "your-list-name";
int itemId = 1; // 要更新的列表项ID
string apiUrl = $"{siteUrl}/_api/web/lists/getbytitle('{listName}')/items({itemId})";

string requestBody = @"{
    '__metadata': { 'type': 'SP.Data.YourListNameListItem' },
    'Title': 'New Title',
    'Description': 'New Description'
}";

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(apiUrl);
request.Method = "POST";
request.Accept = "application/json;odata=verbose";
request.ContentType = "application/json;odata=verbose";
request.Headers["X-HTTP-Method"] = "MERGE";
request.Headers["IF-MATCH"] = "*";
request.Headers["X-RequestDigest"] = GetRequestDigest(siteUrl);

using (StreamWriter writer = new StreamWriter(request.GetRequestStream()))
{
    writer.Write(requestBody);
    writer.Flush();
}

HttpWebResponse response = (HttpWebResponse)request.GetResponse();

if (response.StatusCode == HttpStatusCode.NoContent)
{
    Console.WriteLine("列表项更新成功！");
}
else
{
    Console.WriteLine("列表项更新失败！");
}