I have this method:
public ActionResult dataGrid()
{
List<ExpandoObject> list = new List<ExpandoObject>();
using (OdbcCommand DbCommand = repODBC.dbConnection.CreateCommand())
{
DbCommand.CommandText = "Select * From MyTable";
OdbcDataReader reader = DbCommand.ExecuteReader();
while (reader.Read())
{
dynamic obj = new ExpandoObject();
obj.name="Peter";
obj.num=123;
obj.id=1;
list.Add(obj);
}
return View(list);
}
}
I try to access data this way. I use Grid.Mvc... :
@Html.Grid((IEnumerable<System.Dynamic.ExpandoObject>)Model).Columns(columns =>
{
columns.Add(m => m.id).Titled("ID");
columns.Add(m => m.name).Titled("Name");
columns.Add(m => m.num).Titled("OS").Filterable(true);
})
but i get this error: Cannot convert lambda expression to type 'GridMvc.Columns.IGridColumn' because it is not a delegate
How can I add columns to grid to show data of ExpandoObject?
You can't do that. IGridColumnCollection.Add has as a parameter an Expression tree:
IGridColumn<T> Add<TKey>(Expression<Func<T, TKey>> constraint)
dynamic doesn't mix well with expression trees "built by the compiler" (by "built by the compiler" I mean expression trees not built manually through the Expression class but built directly in source code)
(I had already thought of using dynamic for your other question :-) )
Now... You could try using:
columns.Add(m => ((IDictionary<string, object>)m)["id"]).Titled("ID");
(an ExpandoObject implements (privately) the interface IDictionary<string, object>), but 50% it won't work and you'll get an exception at runtime. But you can try :-)
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