DataGrid filled from runtime created DataTable is non-editable!

[Bill Toulias]

I want to be able to display the tuples of a select query (which may change
at runtime, so no prior knowledge for column characteristics) and edit them
as well.

I used this code, that executes the select, gets schema from the datareader,
creates a table that can host data of that type, fills it with data from the
datareader and then binds it to a DataGrid.

The problem is that although i seem to do everything correctly and although
all the readonly flags are set to false, the DataGrid cannot be edited!!

Any ideas?

Here's the code:

DataRow myRow;
DataTable tbContInfo;
DataTable tbCont = new DataTable("CONTACTS");
Connection conn = new Connection();
conn.Open();
SqlCommand SQLCommand = new SqlCommand();
SQLCommand.CommandText = textBox1.Text;
SQLCommand.Connection = conn.getConn();
SqlDataReader data = SQLCommand.ExecuteReader(CommandBehavior.KeyInfo);
data.Read();
//Get schema of query results and construct the appropriate DataTable.
tbContInfo = data.GetSchemaTable();
for (int j=0;j<tbContInfo.Rows.Count;j++)
{
DataColumn myColumn = new DataColumn();
myColumn.DataType = tbContInfo.Rows[j]["DataType"].GetType();
myColumn.ColumnName = tbContInfo.Rows[j]["ColumnName"].ToString();
myColumn.ReadOnly = false;
tbCont.Columns.Add(myColumn);
}
tbCont.BeginLoadData();
//Load newly constructed DataTable with data from reader.
if (data.HasRows)
while (data.Read())
{
myRow = tbCont.NewRow();
for (int i=0;i<data.FieldCount;i++)
{
if (!data.IsDBNull(i))
myRow[i] = data.GetValue(i);
}
tbCont.Rows.Add(myRow);
}
tbCont.EndLoadData();
data.Close();
conn.Close();
dataGrid1.ReadOnly = false;
dataGrid1.SetDataBinding(tbCont,"");