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這裏是我的代碼 -不能獲得下拉框選擇的值
combo.DisplayMember = "Caption";
combo.ValueMember = "PortName";
combo.Items.Add(new { PortName = "port", Caption = "caption" });
//Null reference exception here-
String PortName = combo.SelectedValue.ToString();
我錯過了什麼?
最新情況:
//the following line has solved my problem- dynamic item = cmbPortNo.SelectedItem; string PortName = item.PortName;
你有數據源? – Badiparmagi
1.什麼**事件**您獲得選定的價值2.顯示是否良好? –