c++ builder 获取DBGrid多选数据某个字段的值

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TDataSet* ds = DBGrid1->DataSource->DataSet;        int count = DBGrid1->SelectedRows->Count;        for(int i=0;i<count;i++)        {                ds->GotoBookmark((void*)DBGrid1->SelectedRows->Items[i].c_str());                ShowMessage(ds->Fields->FieldByName("xm")->AsString);        }


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