質問: "useful value"
回答: // bind combobox to dictionary dictionary<string, string>test = new dictionary<string, string>(); test.add("1", "dfdfdf"); test.add("2", "dfdfdf"); test.add("3", "dfdfdf"); combobox1.datasource = new bindingsource(test, null); combobox1.displaymember = "value"; combobox1.valuemember = "key"; // get combobox selection (in handler) string value = ((keyvaluepair<string, string>)combobox1.selecteditem).value;