可以依次给comboBox的items赋valuemember属性赋值吗？
我从数据库取出两列数据，一列做items的text，另一列经过判断后，把某个小集合内的items的valuemember赋相同的值，我是下面这样做的，没有实现，请大家帮忙啊！

C# code

myConn = new SqlConnection(myConnStr);            myConn.Open();            String myCmdStr_MemberName = "Select memberID,classID From tbMember Order By memberID";            SqlCommand myCMD_MemberName = new SqlCommand(myCmdStr_MemberName,myConn);            SqlDataReader myDR_MemberName = myCMD_MemberName.ExecuteReader();            while (myDR_MemberName.Read())            {                                 if (myDR_MemberName.GetString(1) == "JXJX" || myDR_MemberName.GetString(1) == "WFWF")                {                    this.comB_MateName.Items.Add(myDR_MemberName.GetString(0));                    this.comB_MateName.ValueMember = "GD";                }                else if (myDR_MemberName.GetString(1) == "ZHZH")                {                    this.comB_MateName.Items.Add(myDR_MemberName.GetString(0));                    this.comB_MateName.ValueMember = "BKBK";                }                else                {                    this.comB_MateName.Items.Add(myDR_MemberName.GetString(0));                    this.comB_MateName.ValueMember = "JDJD";                }            }            myDR_MemberName.Close();            myConn.Close();

[解决办法]
valuemember是说的作为值的字段（属性）名，而不是值本身。你用错了。