datatable objdatatable = new datatable();
datacolumn dc;
dc = new datacolumn(customercode);
objdatatable.columns.add(dc);
viewstate[erpsystemapplicationtargetlist] = objdatatable;
datatable o = (datatable)viewstate[erpsystemapplicationtargetlist];
string customercode =111;
o.select(customercode= + customercode)
报错：未找到列 [111]。
请问错在哪里了。