Datasheet view is always read-only

I encountered a problem in the project. The list cannot be edited in Datasheet view,

First, if your machine is 64-bit and has 64-bit Office

First, refer to the following

1. Check if you have installed Microsoft Office 2010 on your Windows operating system.
2. Read the use Datasheet view in 64-bit office 2010

Http://office.microsoft.com/en-us/sharepoint-foundation-help/use-datasheet-view-in-64-bit-office-2010-HA101882420.aspx.
3. If your Microsoft Office 2010 is 64-bit,
Download the accessdatabaseengine.exe from http://www.microsoft.com/download/en/confirmation.aspx? The id = 23734.
4. Install the accessdatabaseengine.exe.
5. Refresh your page.
 

However, when you can use Datasheet view, you can find that there is "this view is read-only." "read-only" in the lower-left corner"

Click the following to bring up the CHM File.

And open it as follows:

 

Status Bar displays 'read-only' or 'this view is read-only'

The selected cell, column, row, or the entire view is read-only. You cannot
Edit a cell, column, or row that is marked read-only. If the entire view is
Read-only, you cannot edit any portion of the view.

Portions of a view, or an entire view, might be read-only due to one or more
Of the following reasons:

• Certain columns, suchCreatedAndModified, Are always read-only. values for these columns are
  Entered automatically.
• The changes you made to the selected row or column have been submitted
  The server. If there is no conflict or error, you will be able to edit the row
  Or column after the changes have been saved.
• There is an unresolved conflict or error in the selected row or column.
  Resolve the conflict or error before attempting to edit the selected row or
  Column.
• The list is set up to require content approval, and you are viewing the list
  In the all items view.
  
• In the my submissions view of a list that requires content approval,Approval StatusAndCommentColumn are read-only.
  Only a user with manage lists right can edit these two columns.
• Attachments are read-only in a list that requires content approval. You
  Cannot view or edit attachments in any of the views.
• The document in the current row has been checked out by a user. You cannot
  Edit the columns in the row until the user checks the document in.
• You do not have permission to edit the column or row. Contact the list
  Author for more information.

 

The red content is the solution. Hope can help any body.