写在ASPxGridView中OnCellEditorInitialize="ASPxGridView_progoods_CellEditorInitialize" 事件中：
//(新增时)初始化赋值
protected void ASPxGridView_progoods_CellEditorInitialize(object sender, DevExpress.Web.ASPxGridView.ASPxGridViewEditorEventArgs e)
{
//初始化授权商品名称
if (e.Column.FieldName == "GOODS_ID")
{
DataTable dt = bll.GetList_goods(PEOID.ToString()).Tables[0];
ASPxComboBox cmb1 = e.Editor as ASPxComboBox;
for (int i = 0; i < dt.Rows.Count; i++)
{
cmb1.Items.Add(dt.Rows[i]["GOODSNAME"].ToString(), dt.Rows[i]["GOODS_ID"].ToString());
}
}
//新增时给是否有效字段初始化赋值为‘是’（默认）
if (ASPxGridView_progoods.IsNewRowEditing == true && e.Column.FieldName == "ISVALID")
{
ASPxComboBox cmb2 = e.Editor as ASPxComboBox;
cmb2.SelectedIndex = 1;
}
}
devexpress中ASPxGridView控件初始化赋值
原文：http://www.cnblogs.com/dfxyw/p/5080103.html