How to convert Linq result to Datatable (using datatable not context)
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How to convert Linq result to Datatable (using datatable not context)
How can i convert linq result to data table?
Dim result = (From e In dsCart.Tables(0).AsEnumerable()
Group e By
DistNum = e("DistNum"),
DistributorName = e("DistributorName"),
SourceID = e("SourceID")
Into Group
Select New With
.DistNum = DistNum,
.DistributorName = DistributorName,
.TotalOrderAmt = Group.Sum(Function(x) x.Field(Of Decimal)("ExtendedAmt")),
.ItemQty = Group.Count(Function(x) x.Field(Of Integer)("ItemQty"))
)
I have come across the following method to convert linq var to data table but i am getting error 'The type arguments for method cannot be inferred from the usage' when calling gv.DataSource = ToDataTable(query)
private Function ToDataTable(Of T)(collection As IEnumerable(Of T)) As DataTable
Dim dt As New DataTable()
Dim _t As Type = GetType(T)
Dim pia As PropertyInfo() = _t.GetProperties()
'Create the columns in the DataTable
For Each pi As PropertyInfo In pia
dt.Columns.Add(pi.Name, If(Nullable.GetUnderlyingType(pi.PropertyType), pi.PropertyType))
Next
'Populate the table
For Each item As T In collection
Dim dr As DataRow = dt.NewRow()
dr.BeginEdit()
For Each pi As PropertyInfo In pia
dr(pi.Name) = pi.GetValue(item, Nothing)
Next
dr.EndEdit()
dt.Rows.Add(dr)
Next
Return dt
End Function
ToDataTable
DataTable
Of course, you could write your own
ToDataTable method and then call that here and in similar situations in the future.– jmcilhinney
8 mins ago
ToDataTable
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There is no
ToDataTablemethod or the like so you do exactly what people have been doing since the beginning of .NET to populate aDataTablewith data from a list of objects.– jmcilhinney
8 mins ago