How to update sharepoint list item using HttpSend with POST in visual studio workflow

Question

Hi

I was trying to update list item in workflow using HttpSend activity , it is giving bad request error always
Can any provide steps to do in proper way like how to pass RequestContent, RequestHeader, ResponseContent and ResponseHeader ?

I mentioned attachment below

Regards
Srinivas Are

Answer 1

Hi @Aare Srinivas Patel ,

Is there any update ? If the answer resolved the question, please remember to accept as answer so that it could also help others in the forum who have the similiar question.

Thanks
Best Regards

Answer 2

Hi @Aare Srinivas Patel ,

Please refer the sample update item Post Request:

function UpdateListItemUsingItemId(Id) {  
       $.ajax   
        ({  
              // _spPageContextInfo.webAbsoluteUrl - will give absolute URL of the site where you are running the code.  
        // You can replace this with other site URL where you want to apply the function  
        url: _spPageContextInfo.webAbsoluteUrl + "/_api/web/lists/getByTitle('list name')/items(" + Id +")",  
        type: "POST",          
        headers:   
        {   
            // Accept header: Specifies the format for response data from the server.  
            "Accept": "application/json;odata=verbose",  
            //Content-Type header: Specifies the format of the data that the client is sending to the server  
            "Content-Type": "application/json;odata=verbose",  
            // IF-MATCH header: Provides a way to verify that the object being changed has not been changed since it was last retrieved.  
            // "IF-MATCH":"*", will overwrite any modification in the object, since it was last retrieved.  
             "IF-MATCH": "*",  
            //X-HTTP-Method:  The MERGE method updates only the properties of the entity , while the PUT method replaces the existing entity with a new one that you supply in the body of the POST  
            "X-HTTP-Method": "MERGE",  
            // X-RequestDigest header: When you send a POST request, it must include the form digest value in X-RequestDigest header  
            "X-RequestDigest": $("#__REQUESTDIGEST").val()  
        },  
         data: JSON.stringify({  
         __metadata:  
            {  
              // Format of the "type" is: SP.Data.<<ListName>>ListItem. First character of the <<ListName>> should be in Capital  
              type: "SP.Data.List_x0020_NameListItem"  
            },  
            description: "Updated Description"  
        }),  
        success: function(data, status, xhr)   
        {   
            console.log("Success");       
        },   
        error: function(xhr, status, error)   
        {   
            console.log("Failed");  
        }   
    });  
}  

And in the Visual Studio custom workflow activity, the request body may need to prepend the parameter keyword, you can refer the following demo (create site with a Post Request) which should be similiar with update list item:

Custom Workflow Activity for Creating a SharePoint Site

Another important point, the __metadata type should be updated with this format:

type: "SP.Data.<ListName>ListItem"

Thanks
Best Regards

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Answer 3

check this article: Call web services from SharePoint workflows. It contains example of calling web service from workflow using HttpSend activity - pretty similar to what you are looking for.