(VB.NET) SharePoint -- Update List

See more SharePoint Examples

This example shows how to update a SharePoint (to change the value of a list property, such as Title).

For more information, see https://docs.microsoft.com/en-us/sharepoint/dev/sp-add-ins/working-with-lists-and-list-items-with-rest

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

' This requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim http As New Chilkat.Http

' If SharePoint Windows classic authentication is used, then set the 
' Login, Password, LoginDomain, and NtlmAuth properties.
http.Login = "SHAREPOINT_USERNAME"
http.Password = "SHAREPOINT_PASSWORD"
http.LoginDomain = "SHAREPOINT_NTLM_DOMAIN"
http.NtlmAuth = True

' The more common case is to use SharePoint Online authentication (via the SPOIDCRL cookie).
' If so, do not set Login, Password, LoginDomain, and NtlmAuth, and instead
' establish the cookie as shown at SharePoint Online Authentication



' To create a list, we're going to POST to
' https://SHAREPOINT_HTTPS_DOMAIN/_api/web/lists(guid'{list_guid}')
' with a request body containing the following JSON:
' 
' {
'   "__metadata": {
'     "type": "SP.List"
'   },
'   "Title": "New title"
' }


' In this case, the list_guid is "b0d92cec-4be1-4e52-943d-ebcb432e1c3b"
Dim req As New Chilkat.HttpRequest
req.HttpVerb = "POST"
req.Path = "/_api/web/lists(guid'b0d92cec-4be1-4e52-943d-ebcb432e1c3b')"

' We need to add a form digest value in the X-RequestDigest header field.
' See this example for details on
' how to get (and cache) a form digest value
req.AddHeader("X-RequestDigest","SHAREPOINT_FORM_DIGEST")

' Set the Content-Type, and indicate that a JSON response is desired.
req.ContentType = "application/json;odata=verbose"
req.AddHeader("Accept","application/json;odata=verbose")

' Create and add the JSON body.
' Use this online tool to generate code from sample JSON: 
' Generate Code to Create JSON
Dim json As New Chilkat.JsonObject
json.UpdateString("__metadata.type","SP.List")
json.UpdateString("Title","New title")

' Send the POST using HTTPS (TLS). Port 443 is the default port for https.
Dim bUseTls As Boolean = True
Dim resp As Chilkat.HttpResponse = http.SynchronousRequest("SHAREPOINT_HTTPS_DOMAIN",443,bUseTls,req)
If (http.LastMethodSuccess <> True) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


' The response body contains JSON.
json.Load(resp.BodyStr)
json.EmitCompact = False

' The expected success response code is 201.
' (Let's also check for 200, just in case things change..)
If ((resp.StatusCode <> 200) And (resp.StatusCode <> 201)) Then
    Debug.WriteLine("Response status code = " & resp.StatusCode)
    Debug.WriteLine(json.Emit())
    Debug.WriteLine("Failed")

    Exit Sub
End If




' Show the successful JSON response.
Debug.WriteLine(json.Emit())
Debug.WriteLine("Success.")

' Use this online tool to generate parsing code from sample JSON: 
' Generate Parsing Code from JSON