asp.net viewstate可以存放datatable对象

private DataTable CreateDataTable() //生成一个DataTable并赋给ViewState

{

DataTable table = new DataTable();

DataColumn colum;

colum = new DataColumn();

colum.DataType = System.Type.GetType("System.Int32");

colum.ColumnName = "ProductType";

table.Columns.Add(colum);

colum = new DataColumn();

colum.DataType = System.Type.GetType("System.Int32");

colum.ColumnName = "ProductSpecID";

table.Columns.Add(colum);

colum = new DataColumn();

colum.DataType = System.Type.GetType("System.String");

colum.ColumnName = "ProductCode";

table.Columns.Add(colum);

ViewState["detailtable"] = table; //存放table

return table;

}
使用时就直接：

DataTable table = ViewState["detailtable"] as DataTable;