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What is the right way to show only group by column in datatable


What is the right way to show only group by column in datatable

By : Vicky
Date : November 21 2020, 04:01 AM
wish helps you You need to load another DataTable if you want your query to be returns DataTable
So use below query,
code :
DataTable dtResult = new DataTable();
dtResult.Columns.Add("Empolyee_CRC");

DataTable HasDuplicates = dt.AsEnumerable()
                            .GroupBy(g => g["Empolyee_CRC"])
                            .Where(c => c.Count() > 1)
                            .OrderBy(x => x.Key)
                            .Select(g => dtResult.LoadDataRow(new object[] { g.FirstOrDefault().Field<string>("Empolyee_CRC") }, false))
                            .CopyToDataTable();
DataTable HasDuplicates = dt.AsEnumerable()
                            .GroupBy(g => g["Empolyee_CRC"])
                            .Where(c => c.Count() > 1)
                            .OrderBy(x => x.Key)
                            .Select(g => dtResult.LoadDataRow(new object[] { g.Key }, false))
                            .CopyToDataTable();
if (dt.Rows.Count > 0 && dt.AsEnumerable().Select(x => x["Empolyee_CRC"]).Count() > 0)
{
    var result = dt.AsEnumerable()
                   .GroupBy(g => g["Empolyee_CRC"])
                   .Where(c => c.Count() > 1)
                   .OrderBy(x => x.Key)
                   .Select(g => new { Empolyee_CRC = g.FirstOrDefault().Field<string>("Empolyee_CRC") })
                   .ToList();
}


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Group by a column then Add each group to datatable then into a dataset

Group by a column then Add each group to datatable then into a dataset


By : P K Ghosh
Date : March 29 2020, 07:55 AM
wish of those help 1.how do i group by the Product group column using LINQ
It sounds like what you are asking for isn't technically called a group in LINQ. Grouping in linq implies that you are taking the values from one column and combining them in some way(SUM, Average) and displaying one record per some unique identifier. In your example if you wanted to show the average price per group then that would require a group but from your explanation it looks like you just need 3 different select statements that would look like:
code :
Dim ds As New DataSet
Dim groupIDs = From r in bookedorders Select r.Item("productgroup") Distinct
for each r in groupIDs
    Dim query = From t in bookedorders Where t.Item("productgroup") = r select t.Item("ProductName"), t.Item("ProductPrice")
    If query IsNot Nothing AndAlso query.Any Then
        Dim tempDT as new DataTable
        tempDT.Merge(query.CopyToDataTable)
        tempDt.Name = "ProductID" & r
        ds.Tables.Add(tempDT)
    End IF
Next
Dim query = From t in bookedorders Where t.Item("productgroup") = r select t.Item("ProductName"), t.Item("ProductPrice")
Dim query = From t in bookedorders Where t.Item("productgroup") = r select t
Dim tempDT as new DataTable
tempDT.Merge(query.CopyToDataTable)
tempDT.Columns.Remove("GroupID")
tempDt.Name = "ProductID" & r
ds.Tables.Add(tempDT)
show all data only group by specific rows : Select * from table group by column having column = 'value'

show all data only group by specific rows : Select * from table group by column having column = 'value'


By : Markus Nentwig
Date : March 29 2020, 07:55 AM
this will help I use mysql. My table look like this:
code :
SELECT min(ID) as ID, min(Name), `group`, Category
FROM movie
GROUP BY `group`, Category
ORDER BY ID
Datatable - show/hide column group dynamically based on the selected option

Datatable - show/hide column group dynamically based on the selected option


By : AileenGM
Date : March 29 2020, 07:55 AM
around this issue I am using Jquery datatable in my application. My table contains the below mentioned columns: , Just add
code :
table.columns( [0, 1, 2, 3, 4,5,6,7,8,9,10,11,12,13] ).visible( true);
var selCol = $(this).val();
 table.columns( ).visible( true)
Group DataTable by column and convert to List<DataTable>

Group DataTable by column and convert to List<DataTable>


By : user2516286
Date : March 29 2020, 07:55 AM
this will help I have a DataTable that looks like the below: , You can use Linq to objects (and Linq to Dataset) this way
code :
List<DataTable> tablesByCategory = 
    table.AsEnumerable().
          GroupBy(r => r.Field<double>("Category")).
          Select(g => 
          {
              DataTable dt = table.Clone();

              foreach (DataRow r in g)
              {
                  dt.ImportRow(r);
              }

              return dt;
          }).ToList();
Datatable sum column by row grouping and show sum result at the end of each group

Datatable sum column by row grouping and show sum result at the end of each group


By : user5850540
Date : March 29 2020, 07:55 AM
seems to work fine For the same exemple here : https://datatables.net/examples/advanced_init/row_grouping.html
I have made some changes inside "drawCallback": function ( settings ) {
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