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07.02.2008 at 04:45PM PDT, ID: 23535493
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7.7

LINQ to dataset

Asked by isischen in Language Integrated Query - LINQ, Microsoft Visual Basic.Net, Microsoft Visual Studio Express

Tags: , ,

---Dim query = _
    From order In orders.AsEnumerable() _
    Where order.Field(Of DateTime)("OrderDate") > New DateTime(2001, 8, 1) _
    Select order
    ' Create a table from the query.
    Dim boundTable As DataTable = query.CopyToDataTable()
I found the above code from MSDN. I wonder why I can't see CopyToDataTable method available from my copy of vb.net 2008 express version's intellisense. Did I miss on something? I have add referece to and imports system.data.linq and system.data.dlinq!!!
Also, I tried coding as the follow:

Dim fgrid As DataTable = ds.Tables("toy")
        Dim l As Object
        For i = 0 To strcval.Length - 1
            Dim j As Integer = i
            Dim query = From order In fgrid.AsEnumerable() Where Select New With {.s = order("subHead"), .g = order("gpt")}
            For Each l In query
                Console.WriteLine("{0}", l.g.ToString)               <----error falls on this line
            Next
        Next
I am guessing that my code in the WHERE clause---fgrid("vocab").Item("vocab").ToString =              strcval (j).ToString is causing the error...Do you know how to place a string array item or a string variable as the filter value to equals to column content of source datatable?Start Free Trial
[+][-]07.02.2008 at 07:12PM PDT, ID: 21922231

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[+][-]07.02.2008 at 07:16PM PDT, ID: 21922238

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About this solution

Zones: Language Integrated Query - LINQ, Microsoft Visual Basic.Net, Microsoft Visual Studio Express
Tags: LINQ, Microsoft vb.net 2008 express, Invalidcastexception: conversion from string "vocab" to type 'integer' in not valid
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Solution Provided By: naspinski
Participating Experts: 1
Solution Grade: B
 
 
 
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