string xblx = dw1.GetItemString(row, "c_xblx"); string xbid = dw1.GetItemString(row, "c_xbid"); string express = "evaluate(‘sum(if(c_xblx=\"" + xblx + "\"" + " and " + "c_xbid=\"" + xbid + "\", d_cfmj, 0) for all)‘,1)"; string cfmjstr = dw1.Describe(express); double cfmj = 0; Double.TryParse(cfmjstr, out cfmj);

express 表达式结果如下:

evaluate(‘sum(if(c_xblx="xbm" and c_xbid="14330", d_cfmj, 0) for all)‘,1)

datawindow.net 动态按条件汇总字段值