datawindow.net 动态按条件汇总字段值

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)