主要包含三步：
- 设置结构体，其中的field的名字首字母大写，支持get和set
private struct keyValueList { public string Key{get;set;} // key public List<string> ValueStrList{get;set;} // the string value list for the key } - 创建对应的结构体数组
List<keyValueList> gFootprintTypeSelList; // footprint type gFootprintTypeSelList = new List<keyValueList>(); //1. option1: Guest Blogging keyValueList keyValueListGuestBlogging = new keyValueList(); keyValueListGuestBlogging.Key = "Guest Blogging"; keyValueListGuestBlogging.ValueStrList = new List<string>(); //keyValueListGuestBlogging.ValueStrList.Add("Specify Footprint"); keyValueListGuestBlogging.ValueStrList.Add("Guest Blogging"); keyValueListGuestBlogging.ValueStrList.Add("Contribute"); keyValueListGuestBlogging.ValueStrList.Add("Write for us"); keyValueListGuestBlogging.ValueStrList.Add("Guest Category"); keyValueListGuestBlogging.ValueStrList.Add("Submit Content"); gFootprintTypeSelList.Add(keyValueListGuestBlogging); - 把结构体数组赋值给ComboBox的DataSource，把DisplayMember设置为对应的结构体的field的名字（全小写）
cmbFootprintType.DataSource = gFootprintTypeSelList; cmbFootprintType.DisplayMember = "key";
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| 1.3. C#中ComboBox的使用 |  | 第 2 章 C#的网络相关处理 |
