关于winform combobox的问题(本人新手)

Question

最近刚刚从ASP转过来研究.net(c#),先搞一个简单的东东看看,遇到以下问题:
combobox相关代码//定义一个类
public class Dropselect
        {
            public Dropselect(int id, string skey, string title)
            {
                this.Id=id;
                this.Skey=skey;
                this.Title=title;
            }
            public int Id;
            public string Skey;
            public string Title;
        }//将选项添加进去
this.comboBox5.Items.AddRange(new object[] {
                new Dropselect(0,"xx","-条件1-"),
                new Dropselect(1,"FBillNo","订单号"),
                new Dropselect(2,"FDeptId","部  门"),
                new Dropselect(3,"FEmpId","业务员"),
                new Dropselect(4,"FModel","型  号"),
                new Dropselect(5,"FItemId","品  牌"),
                new Dropselect(6,"FCustId","客  户")});
            this.comboBox5.DisplayMember = "Title";
            this.comboBox5.ValueMember = "Skey";VS没有报错,可运行出来显示的是"WindowsFormsApplication1.MainFrame.Dropselect"
不知道怎么回事?

Answer 1

办法1：
public class Dropselect
  {
   public override string ToString()
   {
       return Title;
   }
  public Dropselect(int id, string skey, string title)
  {
  this.Id=id;
  this.Skey=skey;
  this.Title=title;
  }
  public int Id;
  public string Skey;
  public string Title;
  }
办法二
public class Dropselect
  {
  public Dropselect(int id, string skey, string title)
  {
  this.Id=id;
  this.Skey=skey;
  this.Title=title;
  }
  public int Id { get; set; }
  public string Skey { get; set; }
  public string Title { get; set; }
  }

Answer 2

谢谢,再问一下,我如何获取对应的值呢?现在获取到的都是TEXT

Answer 3

呵呵,我指的是调用值的方法
例如:combobox.text.tostring()这是返回显示的项

Answer 4

string s = combobox1.SelectedValue;

Answer 5

提示无法将类型"object"隐式转换为"string"

Answer 6

string s = combobox1.SelectedValue.ToString();

Answer 7

string s = combobox1.SelectedValue.tostring();

Answer 8

还是不行,我用Messagebox.show(combobox1.SelectedValue.Tostring());提示未将对象引用设置到对象的实例

Answer 9

但是我Messagebox.show(combobox1.Text.Tostring());都是正确的

Answer 10

代码不是凑出来的。很怀疑你这基本语法都没熟悉的以前怎么写asp.net程序的如果你会下一个断点调试的话，你可以试试看，如果这都不会。我也没办法了。

Answer 11

调试了一下,还是string s = combobox1.SelectedValue.ToString();这句异常,会不会前面ValueMember没有数值?