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Hi everyone!
I am trying to retrieve a list of columns in a particular table in the database. Here is what I have so far:
var dtCols = conn.GetSchema("Columns", new[] { "waveform_db", null, "Electrical" });
Is this a proper way? If so, how can I access this list to add to a combobox? Here is what I have so far.
if (dtCols != null)
                        foreach (var dr in dtCols)
                            // code to add to combobox
The compiler is balking at the beginning of the foreach statement.
"foreach statement cannot operate on variables of type "" because "" does not contain a public definition for "getenumerator".
I'm not real sure what this means. Does anyone have any hints as to how to resolve this issue?
Thanks everyone!
Posted 21-Jan-13 7:44am
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Solution 1

You could do it like this:
            Dim SQLConnection As SqlConnection = New SqlConnection()
            SQLConnection.ConnectionString = DBconnectionWork
            Dim SQLCommand As SqlCommand = SQLConnection.CreateCommand()
            SQLCommand.CommandText = "select from syscolumns c (nolock), sysobjects o (nolock) " + _
                                     "where = and = 'tablename' " + _
                                     "  and <> 'timestamp' " + _
                                     "order by colid"
            Dim myReader As SqlDataReader = SQLCommand.ExecuteReader()
            Do While myReader.Read()
        Catch ex As Exception
            MsgBox(ex.ToString, MsgBoxStyle.Critical)
        End Try
joshrduncan2012 at 21-Jan-13 14:41pm
That command doesn't work for SQL Server. syscolumns is not recognized.
Wietze Bron at 21-Jan-13 14:52pm
Ofcourse it works. The SQL query is correct.
For 'tablename' you have to substitute your own table.
For DBconnectionWork you have to substitute your own connection string.
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Solution 2

foreach (DataRow dr in dtCols.Rows)
Your specific error is because you need to iterate the Rows of the DataTable not the DataTable itself.
Wietze Bron is correct, his method is exactly what you need.

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