🚀 EF Core Just Changed the Way We Update Data — Here’s Why It Matters

🚀 EF Core Just Changed the Way We Update Data — Here’s Why It Matters

For years, updating records in Entity Framework followed a familiar pattern:

1. Fetch data from the database
2. Modify it in memory
3. Call SaveChanges()

It worked—but it wasn’t efficient.

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🧠 The Problem with the Old Approach

var data = await _context.FtpRequestDetails
    .Where(x => x.FtpRequestId == ftpRequestId)
    .ToListAsync();

foreach (var item in data)
{
    item.FtpStatusId = 3;
}

await _context.SaveChangesAsync();

❌ Issues:

• Loads data into memory unnecessarily
• Slower for large datasets
• Requires change tracking
• More boilerplate code

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⚡ The Game-Changer: ExecuteUpdateAsync() (EF Core 7+)

EF Core introduced a set-based update approach that directly executes SQL without loading entities.

await _context.FtpRequestDetails
    .Where(x => x.FtpRequestId == ftpRequestId)
    .ExecuteUpdateAsync(setters => setters
        .SetProperty(x => x.FtpStatusId, 3)
        .SetProperty(x => x.ThreadLocked, (bool?)null)
        .SetProperty(x => x.ThreadUnlockedTime, DateTime.Now)
        .SetProperty(x => x.Comments, "Rejected Details")
    );

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🔍 What’s Happening Behind the Scenes?

This LINQ query is translated into a single SQL statement:

UPDATE FtpRequestDetails
SET 
    FtpStatusId = 3,
    ThreadLocked = NULL,
    ThreadUnlockedTime = GETDATE(),
    Comments = 'Rejected Details'
WHERE FtpRequestId = @ftpRequestId

👉 No entity loading
👉 No loops
👉 Just pure SQL execution

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💡 Why This Matters

🚀 Performance Boost

• Eliminates unnecessary data fetching
• Executes directly in the database
• Ideal for bulk operations

🧹 Cleaner Code

• No loops
• No manual tracking
• Minimal code, maximum impact

⚙️ Better Scalability

• Handles large datasets efficiently
• Perfect for background jobs & batch updates

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⚠️ Things to Keep in Mind

❌ No Change Tracking

EF Core won’t track these changes.

❌ No SaveChanges()

This executes immediately—no unit of work involved.

❌ No Entity Events

Hooks, validations, or domain events won’t run.

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🧭 When Should You Use It?

✔ Bulk updates
✔ Background processing
✔ Performance-critical operations
✔ Updating multiple records at once

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🚫 When NOT to Use It

❌ If you rely on:

• Business logic per entity
• Validation rules
• Domain events or auditing

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🆚 Old vs New

Feature	Old Approach	New Approach
Performance	❌ Slower	✅ Faster
Memory Usage	❌ High	✅ Low
Change Tracking	✅ Yes	❌ No
Code Complexity	❌ More	✅ Less

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🏁 Final Thoughts

EF Core’s ExecuteUpdateAsync() is a major shift toward modern, high-performance data handling.

It brings the power of SQL directly into LINQ—without sacrificing readability.

👉 If you're still using the old pattern for bulk updates, it's time to upgrade.

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💬 Have you started using ExecuteUpdateAsync() yet?
Would love to hear your experience!

DotNet #EFCore #CleanCode #Performance #SoftwareEngineering #CSharp #Developers