How 开发者_StackOverflow社区to cast
System.Data.Linq.Table<T>
to System.Data.DataTable
DemoDBDataContext context = new DemoDBDataContext();
DataSet ds = new DataSet();
var query = context.Customers;
ds.Tables[0] = query;
How to do that? the assignment
ds.Tables[0] = query;
It throws
Property or indexer
System.Data.DataTableCollection.this[int]
cannot be assigned to it is read only.
You can't cast a System.Data.Linq.Table to a DataTable, however you can easily write an extension method on IEnumerable to convert it to a DataTable:
public static DataTable ToDataTable<T>(this IEnumerable<T> items)
{
var tb = new DataTable(typeof(T).Name);
PropertyInfo[] props = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
foreach(var prop in props)
{
tb.Columns.Add(prop.Name, prop.PropertyType);
}
foreach (var item in items)
{
var values = new object[props.Length];
for (var i=0; i<props.Length; i++)
{
values[i] = props[i].GetValue(item, null);
}
tb.Rows.Add(values);
}
return tb;
}
Source: http://www.chinhdo.com/20090402/convert-list-to-datatable/
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