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ravigosai

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LINQ - Groupby datatable & sum C#

Hello all,

I have following values in datatable.

uid1 varchar(100),
          TotalVisitors INT,
          TotalOrders INT,
          TotalRevenue decimal(18,2),
          ProductRevenue decimal(18,2),
          ShippingCost decimal(18,2),
          AvgOrderValue decimal(18,2),
          UIDDesc varchar(100),
          TotalItems INT

and I want to group the data table by UIDDesc. and I want to sum up all the columns except uid1.

I have used following Linq query because I found out that we can not use groupby directly on datatable.

I have 2 issue one my application is on framework 2.0 so I cant use Linq. can you please tell me what can I do to solve this problem without using linq.

and also I tried using linq and I have added the code below please let me know whats wrong with the code its not working.
var query = from rawdata in dt.AsEnumerable() 
                    group rawdata by rawdata.Field<string>("UIDDesc") into grp
                    orderby grp.Key
                    select new
                    {
                        UIDDesc = grp.Key,
                        TotalOrders = grp.Sum(r => r.Field<decimal>("TotalOrders")),
                        TotalRevenue = grp.Sum(r => r.Field<decimal>("TotalRevenue")),
                        TotalVisitors = grp.Sum(r => r.Field<decimal>("TotalVisitors")),
                        ProductRevenue = grp.Sum(r => r.Field<decimal>("ProductRevenue")),
                        ShippingCost = grp.Sum(r => r.Field<decimal>("ShippingCost")),
                        AvgOrderValue = grp.Sum(r => r.Field<decimal>("AvgOrdervalue")),
                        TotalItems = grp.Sum(r => r.Field<decimal>("TotalItems")),
                    };
                foreach (var grp in query)
                {
                    StringBuilder table = new StringBuilder();
                    table.Append(tablerow);
                    table.Replace("@uid@", grp.UIDDesc.ToString());
                    table.Replace("@orders@", grp.TotalOrders.ToString());
                    table.Replace("@visitors@", grp.TotalVisitors.ToString());
                    table.Replace("@itemcount@", grp.TotalItems.ToString());
                    table.Replace("@productrevenue@", grp.ProductRevenue.ToString());
                    table.Replace("@shippingrevenue@", grp.ShippingCost.ToString());
                    
                    TotalOrders += Convert.ToDecimal(grp.TotalOrders.ToString());
                    TotalRevenue += Convert.ToDecimal(grp.TotalRevenue.ToString());
                    ProductRevenue += Convert.ToDecimal(grp.ProductRevenue.ToString());
                    ShippingRevenue += Convert.ToDecimal(grp.ShippingCost.ToString());
                    TotalVisits += Convert.ToDecimal(grp.TotalVisitors.ToString());
                    TotalItems += Convert.ToDecimal(grp.TotalItems.ToString());
                    sb.Append(table.ToString());
                }

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Avatar of Jesse Houwing
Jesse Houwing
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Avatar of ravigosai
ravigosai

ASKER

Can you please explain me how this will be helpful in my case. and Can you help me building similar kind of code for my datatable.
by the given query I am getting the results I want now when I am trying to return this values using table.replace I am getting error message. Please help me out if I am doing something wrong.

What is the error message your're getting? Without some information on what you're doing exactly, I can't really help you.
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I didnt get help on time so I was trying to sove the issue on my own. and I was able to find the soultion. so because of that reason I am choosing my comment as an answer. Please let me know if I am required to choose some other comment also and I will do that.

The link was not helpful in this context but still as expert tried to help so I am giving him partial credit.