JavaScript文件返回undefined求助：SharePoint列表字段未正常显示

Hey there, let's break down why your txtfurtherinfo field is showing up as undefined while all other fields work perfectly—this is a super common SharePoint JS issue, and we can fix it step by step:

1. Double-Check the SharePoint Field's Internal Name #

This is the #1 culprit more often than not! SharePoint uses case-sensitive internal names (not the friendly display names you see in the list) when accessing fields via JavaScript.

• To find the internal name: Go to your SharePoint list settings → Click the "Further Info" field name → Look at the URL bar—you'll see the internal name in the query string (it might look like Field=FurtherInfo_x0020_Details if your display name has spaces).
• Make sure your code uses this exact internal name when pulling the value. For example:

  // Wrong (uses display name)
  txtfurtherinfo = listItem.get_item("Further Info");
  // Correct (uses internal name)
  txtfurtherinfo = listItem.get_item("FurtherInfo_x0020_Details");
  

2. Ensure the Field is Included in Your Query #

SharePoint doesn't return all list fields by default—you have to explicitly request the ones you need when fetching items.

• If you're using SP.ClientContext or CAML queries, verify you've added the field to your load call:

  var listItems = list.getItems(camlQuery);
  // Add your field to the Include() list
  context.load(listItems, 'Include(Title, Name, FurtherInfo_x0020_Details)');
  

3. Confirm the List Item Has a Value #

It sounds obvious, but sometimes the specific item you're fetching has an empty "Further Info" field!

• Open the SharePoint list item directly and check if there's actual content in the field. If it's empty, SharePoint might return null or undefined—add a fallback to keep your variable from breaking:

  txtfurtherinfo = listItem.get_item("YourInternalFieldName") || "";
  

4. Verify Variable Scope & Assignment #

You said you initialized var txtfurtherinfo = ""; at the start, but make sure you're actually assigning a value to it later in getDeviceDetails().

• Check for typos in the variable name, and ensure you're not skipping the assignment inside a conditional block that never runs. For example:

  function getDeviceDetails() {
    var txtTitle = "";
    var txtName = "";
    var txtfurtherinfo = ""; // Confirm this is declared in the right scope
    // ... rest of your code
    // Make sure this assignment line exists and uses the correct field name
    txtfurtherinfo = listItem.get_item("CorrectInternalName");
    // ...
  }
  

5. Debug with Console Logs #

Add quick logs to pinpoint exactly where the issue occurs:

// After fetching your list item
console.log("Raw list item data:", listItem);
console.log("Further Info field value:", listItem.get_item("YourInternalFieldName"));
console.log("txtfurtherinfo variable value:", txtfurtherinfo);

Open your browser's dev tools (F12) → Console tab, and check what these outputs show. If the list item doesn't have the field at all, that confirms it's either missing from your query or you're using the wrong internal name.

内容的提问来源于stack exchange，提问作者Dazza