I am trying to update a list item in sharepoint. I am using the code below it returns Bad Request. any idea Thanks in advance...

Question

string cont = "{ '__metadata': { 'type': 'SP.IssuesListItem' }, 'Status': 'Close'}";
var content = new StringContent(cont, Encoding.UTF8, "application/json");
string url = "https://mywebsite.com/_api/web/lists/GetByTitle('tasks')/items?$filter=ID eq 932"

var credential = new System.Net.NetworkCredential(
                "username",
                "password",
                "domain");

            using (var handler = new HttpClientHandler() { Credentials = credential, UseProxy = false })
            {
                using (var client = new HttpClient(handler))
                {


                    client.DefaultRequestHeaders.Accept.Clear();

                    client.DefaultRequestHeaders.Add("X-HTTP-Method", "MERGE");
                    var mediaType = new MediaTypeWithQualityHeaderValue("application/json");
                    mediaType.Parameters.Add(new NameValueHeaderValue("odata", "nometadata"));
                    client.DefaultRequestHeaders.Accept.Add(mediaType);
                    client.DefaultRequestHeaders.Add("X-RequestDigest", await GetRequestDigest());
                    client.DefaultRequestHeaders.Add("binaryStringRequestBody", "true");
                    client.DefaultRequestHeaders.Add("IF-MATCH", "*");

                    HttpResponseMessage response = await client.PostAsync(url, content);
                    response.EnsureSuccessStatusCode();
                    return true;
                }
            }

Answer 1

Hi,
did you convert your password to SecureString?

 string pwString = "password";
 System.Security.SecureString pwSecure = new System.Security.SecureString();
 foreach (var c in pwString) pwSecure.AppendChar(c);

 var credential = new System.Net.NetworkCredential(
                 "username",
                 pwSecure,
                 "domain");

Answer 2

To simply write to one blank NFC tag, make sure all of these options are unchecked. Finally, select “Write” at the bottom of the screen and tap the back of your phone write my paper help to a blank NFC tag as if you were going to read it. This writes the URL to the tag. Congratulations, you've just encoded your first NFC tag!

Answer 3

you are using the lookup url instead of the update url:

POST https://{site_url}/_api/web/lists(guid'{list_guid}')   
Authorization: "Bearer " + accessToken   
Accept: "application/json;odata=verbose"   
Content-Type: "application/json"   
Content-Length: {length of request body as integer}   
If-Match: "{etag or *}"   
X-HTTP-Method: "MERGE"   
X-RequestDigest: "{form_digest_value}"   
   
{   
  "__metadata": {   
    "type": "SP.List"   
  },   
  "Title": "New title"   
}   

the lookup should give you the guid. also it looks like you are using basic authentication. be sure this is supported. if its onprem or hosted vm you are probably good. but online Sharepoint will not support basic