how to write linq query of the below sql query

var _TestRetensionList = _dbContext.MstStorage
    .Where(k => k.IsActive == ApplicationData.IsActive)
    .GroupJoin(
        _dbContext.TblStorageBatch,
        mstStorage => mstStorage.Id,
        tblStorageBatch => tblStorageBatch.StorageId,
        (mstStorage, tblStorageBatch) => new { MstStorage = mstStorage, TblStorageBatch = tblStorageBatch }
    )
    .SelectMany(
        x => x.TblStorageBatch.DefaultIfEmpty(),
        (x, m1) => new
        {
            Id = x.MstStorage.Id,
            Row = x.MstStorage.Row,
            Shelf = x.MstStorage.Shelf,
            Tray = x.MstStorage.Tray,
            Capacity = x.MstStorage.Capacity,
            LabId = x.MstStorage.LabId,
            BatchId = m1?.BatchId,
            SampleQty = m1?.SampleQty,
            Rack = x.MstStorage.Rack
        }
    )
    .OrderBy(k => k.Id)
    .Select((k, index) => new TestRetensionList()
    {
        Id = k.Id,
        Row = k.Row,
        Shelf = k.Shelf,
        Tray = k.Tray,
        Capacity = k.Capacity,
        LabId = k.LabId,
        BatchId = k.BatchId,
        SampleQty = k.SampleQty,
        Rack = k.Rack,
        LeftQty = (k.Capacity - k.SampleQty),
        Rank = index + 1, // Assign the rank using the index + 1
        Statuscolor = Statuscolor((int)(k.Capacity - k.SampleQty), k.SampleQty).Result,
        btnvisible = BtnVisibility((int)(k.Capacity - k.SampleQty), k.SampleQty).Result,
    })
    .ToList();

I have provided the updated query

var query = (from m in dbContext.MstStorage
             join s in dbContext.tblStorageBatch on m.Id equals s.StorageId into storageBatches
             from sb in storageBatches.DefaultIfEmpty()
             orderby m.Id
             select new
             {
                 m.Id,
                 m.Rack,
                 m.Capacity,
                 BatchId = sb == null ? null : (int?)sb.BatchId,
                 SampleQty = sb == null ? null : (int?)sb.SampleQty
             })
            .AsEnumerable() // Switch to LINQ to Objects for row numbering
            .Select((x, index) => new
            {
                RowNumber = index + 1,
                RankVendor = x.Rack != null ? (index + 1) : 0, // Reset RankVendor for each new Rack value
                x.Id,
                x.Rack,
                x.Capacity,
                x.BatchId,
                x.SampleQty
            });

In this corrected query:

1. We first perform the join and ordering as before.

2. We use .AsEnumerable() to switch to LINQ to Objects, allowing us to use the Enumerable.Select method for generating RowNumber and RankVendor.

3. In the final Select method, we use the index parameter to calculate RowNumber. We also compute RankVendor by resetting it to 0 whenever a new Rack value is encountered.

This should correctly calculate the RowNumber based on m.Id and RankVendor based on m.Rack.

var query = (from m in dbContext.MstStorage
             join s in dbContext.tblStorageBatch on m.Id equals s.StorageId into storageBatches
             from sb in storageBatches.DefaultIfEmpty()
             orderby m.Id
             select new
             {
                 m.Id,
                 m.Rack,
                 m.Capacity,
                 BatchId = sb == null ? null : (int?)sb.BatchId,
                 SampleQty = sb == null ? null : (int?)sb.SampleQty
             })
            .AsEnumerable() // Switch to LINQ to Objects for row numbering
            .Select((x, index) => new
            {
                RowNumber = index + 1,
                RankVendor = x.Rack != null ? x.Rack + "-" + (index + 1) : (index + 1).ToString(),
                x.Id,
                x.Rack,
                x.Capacity,
                x.BatchId,
                x.SampleQty
            });

1. We first perform the join and ordering as before.

2. We use .AsEnumerable() to switch to LINQ to Objects, allowing us to use the Enumerable.Select method for generating RowNumber and RankVendor.

3. In the final Select method, we use the index parameter to calculate RowNumber. We also compute RankVendor based on the Rack column, appending the row number if Rack is not null, or just using the row number itself if Rack is null.

This may help you

Take a look at this LINQ Code:

//LINQ query
var query = from m in MstStorage
            join s in tblStorageBatch on m.Id equals s.StorageId into m_s
            from s in m_s.DefaultIfEmpty()
            orderby m.Id
            select new
            {
                RowNumber = m.Id,
                Rankvendor = m.Rack,
                m.Id,
                m.Rack,
                m.Capacity,
                s.BatchId,
                s.SampleQty
            };

//Executing the LINQ query
var result = query.ToList();

PS: I generated this with my (sideproject gone product) linqmeup.com

using (var context = new YourDbContext()) { var query = from m in context.MstStorage join s in context.tblStorageBatch on m.Id equals s.StorageId into storageBatchJoin from s in storageBatchJoin.DefaultIfEmpty() select new { RowNumber = (from m2 in context.MstStorage where m2.Id <= m.Id select m2).Count(), Rankvendor = (from m2 in context.MstStorage where m2.Rack == m.Rack && m2.Id <= m.Id select m2).Count(), m.Id, m.Rack, m.Capacity, s.BatchId, s.SampleQty }; // Execute the query var result = query.ToList(); }

Your Query Result not matched against my sql query,

pls look into it

var query = (from m in _dbContext.MstStorage.Where(k => k.IsActive == ApplicationData.IsActive)
             join s in _dbContext.TblStorageBatch on m.Id equals s.StorageId into storageBatches
             from sb in storageBatches.DefaultIfEmpty()
             orderby m.Id
             select new
             {
                 RowNumber = 0, // Will be set later
                 Rankvendor = 0, // Will be set later
                 m.Id,
                 m.Rack,
                 m.Capacity,
                 BatchId = sb.BatchId,
                 SampleQty = sb.SampleQty
             }).ToList();

var result = query.Select((m, index) => new TestRetensionList
{
    Id = m.Id,
    Rack = m.Rack,
    Capacity = m.Capacity,
    BatchId = m.BatchId,
    SampleQty = m.SampleQty,
    RowNumber = index + 1,
    Rankvendor = query.Where(x => x.Rack == m.Rack && x.Id <= m.Id).Count(),
    // Other properties
}).ToList();