如何扩展JS代码以显示SharePoint列表的多行文本字段？

Hey there! Let's get this sorted out. Since you already have a working setup for the "Known Issues" field, extending it to include the "Further Details" multi-line field is straightforward once we cover a few key points.

Step 1: Confirm the Internal Name of Your New Field #

First off, SharePoint relies on internal field names (not display names) for API calls. To get the internal name of your "Further Details" field:

• Go to your SharePoint list settings
• Click on the "Further Details" field
• Look at the browser URL—you’ll see a segment like Field=Further_x0020_Details (the part after Field= is the internal name). Jot that down; we’ll need it later.

Step 2: Add a Container for Further Details in Your Page #

You already have the knowntitle div for the known issue. Add a new div to hold the further details (style it later as needed):

<div id="knowntitle"></div>
<!-- New container for Further Details -->
<div id="furtherdetails" style="margin-top: 1rem; padding: 0.5rem; border-top: 1px solid #eee;"></div>

Step 3: Update Your JavaScript to Fetch and Display the New Field #

Let’s cover the two most common SharePoint JS approaches: REST API and JSOM.

If You’re Using the SharePoint REST API (Most Common) #

Here’s how to modify your existing REST call to include the new field:

Example Original Code

Your existing code might look like this:

function loadKnownIssues() {
    var siteUrl = _spPageContextInfo.webAbsoluteUrl;
    var listName = "YourListName"; // Replace with your actual list name

    $.ajax({
        url: siteUrl + "/_api/web/lists/getbytitle('" + listName + "')/items?$select=KnownIssues",
        type: "GET",
        headers: { "Accept": "application/json;odata=verbose" },
        success: function(data) {
            if (data.d.results.length > 0) {
                document.getElementById("knowntitle").textContent = data.d.results[0].KnownIssues;
            }
        },
        error: function(error) {
            console.log("Error loading known issues: ", error);
        }
    });
}

Modified Code with Further Details

Update the $select parameter to include your new field, then render it in the new div:

function loadKnownIssues() {
    var siteUrl = _spPageContextInfo.webAbsoluteUrl;
    var listName = "YourListName";
    var furtherDetailsInternalName = "Further_x0020_Details"; // Replace with your actual internal name

    $.ajax({
        // Add the Further Details field to the $select list
        url: siteUrl + "/_api/web/lists/getbytitle('" + listName + "')/items?$select=KnownIssues," + furtherDetailsInternalName,
        type: "GET",
        headers: { "Accept": "application/json;odata=verbose" },
        success: function(data) {
            if (data.d.results.length > 0) {
                var item = data.d.results[0];
                
                // Existing code to display Known Issues
                document.getElementById("knowntitle").textContent = item.KnownIssues;
                
                // Display Further Details
                var furtherDetailsDiv = document.getElementById("furtherdetails");
                
                if (item[furtherDetailsInternalName]) {
                    // Use innerHTML if your field uses Enhanced Rich Text (preserves formatting)
                    furtherDetailsDiv.innerHTML = item[furtherDetailsInternalName];
                    
                    // Uncomment below for Plain Text (converts newlines to line breaks)
                    // furtherDetailsDiv.innerHTML = item[furtherDetailsInternalName].replace(/\n/g, "<br>");
                } else {
                    furtherDetailsDiv.textContent = "No further details available.";
                }
            }
        },
        error: function(error) {
            console.log("Error loading data: ", error);
        }
    });
}

If You’re Using JSOM (JavaScript Object Model) #

Adjust your JSOM code to load and render the new field:

function loadKnownIssues() {
    var clientContext = new SP.ClientContext.get_current();
    var list = clientContext.get_web().get_lists().getByTitle("YourListName");
    var camlQuery = new SP.CamlQuery();
    camlQuery.set_viewXml("<View><RowLimit>1</RowLimit></View>"); // Fetch first list item
    var listItems = list.getItems(camlQuery);
    
    // Load both fields by their internal names
    clientContext.load(listItems, 'Include(KnownIssues, Further_x0020_Details)');

    clientContext.executeQueryAsync(function() {
        var listItemEnumerator = listItems.getEnumerator();
        if (listItemEnumerator.moveNext()) {
            var item = listItemEnumerator.get_current();
            
            // Display Known Issues
            document.getElementById("knowntitle").textContent = item.get_item("KnownIssues");
            
            // Display Further Details
            var furtherDetails = item.get_item("Further_x0020_Details");
            var furtherDetailsDiv = document.getElementById("furtherdetails");
            
            if (furtherDetails) {
                // Handle Enhanced Rich Text
                if (furtherDetails.get_richText()) {
                    furtherDetailsDiv.innerHTML = furtherDetails.get_html();
                } else {
                    // Handle Plain Text
                    furtherDetailsDiv.textContent = furtherDetails.get_value();
                }
            } else {
                furtherDetailsDiv.textContent = "No further details available.";
            }
        }
    }, function(sender, args) {
        console.log("Error: " + args.get_message());
    });
}

Key Tips to Avoid Headaches #

• Double-Check Internal Names: This is the #1 cause of failed API calls—make sure you’re using the exact internal name from the list settings URL.
• Rich Text vs Plain Text: Match your rendering method to the field’s settings in SharePoint to preserve formatting correctly.
• Debug with Console: Keep the error logging in place to spot issues quickly (check your browser’s developer console for messages).

If you have specific code you tried that’s not working, share it and I’ll help tweak it further!

内容的提问来源于stack exchange，提问作者Dazza