DevExpress控件中，ASPxGridView里面的ASPxComboBox的值为什么显示不出来？

[civilman]

问题一：
为什么在以下程序中，ASPxComboBox的值显示不出来，按我的理解，ASPxComboBox中的TextField应该是显示的值，而ValueField应当是实际的值。可我在后台都赋值并绑定了，为什么这个ASPxComboBox的值显示不出来？
问题二：
以下几个绑定关系：
（1）GridViewDataComboBoxColumn中的FieldName="repairserviceid"
（2）ASPxComboBox中的TextField、ValueField和我另外查到的 Value='<%# Eval("name")%>'
这四个绑定关系有到底有什么区别？


前台：

 <dx:ASPxGridView ID="ASPxGridViewService" runat="server" AutoGenerateColumns="False"
            KeyFieldName="id" Width="833px">
            <SettingsBehavior AllowDragDrop="False" AllowGroup="False" AllowSort="False" />
            <Columns>
                <dx:GridViewDataTextColumn FieldName="id" ReadOnly="True" VisibleIndex="0" Width="10px"
                    Caption="序号">
                </dx:GridViewDataTextColumn>
                <dx:GridViewDataComboBoxColumn FieldName="repairserviceid" VisibleIndex="2" Caption="项目名称"
                    Width="600px">
                    <DataItemTemplate>
                        <dx:ASPxComboBox ID="ASPxComboBoxname" runat="server" CallbackPageSize="10" ValueType="System.String"
                            TextField="name" ValueField="repairserviceid" Width="400px" DropDownStyle="DropDown">
                        </dx:ASPxComboBox>
                    </DataItemTemplate>
                </dx:GridViewDataComboBoxColumn>
            </Columns>
            <SettingsBehavior AllowDragDrop="False" AllowSort="False" AllowGroup="False"></SettingsBehavior>
            <SettingsPager Visible="False" Mode="ShowAllRecords">
            </SettingsPager>
        </dx:ASPxGridView>

后台：

    public partial class WebForm4 : BasePage
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack && !IsCallback)
            {
                List<ShortInfo> listRepair = new List<ShortInfo>();
                for (int i = 0; i < 5; i++)
                {
                    ShortInfo rshortinfo = new ShortInfo();
                    rshortinfo.id = i;
                    rshortinfo.name = "汽油";
                    rshortinfo.repairserviceid =1000;
                    rshortinfo.price = 10;
                    listRepair.Add(rshortinfo);

                }
                ASPxGridViewService.DataSource = listRepair;
                ASPxGridViewService.DataBind();
               
                GridViewEditingMode mode = (GridViewEditingMode)Enum.Parse(typeof(GridViewEditingMode), "Inline");
                ASPxGridViewService.SettingsEditing.Mode = mode;
                ASPxGridViewService.SettingsEditing.NewItemRowPosition = GridViewNewItemRowPosition.Bottom;

            }

        }
    }
    public class ShortInfo
    {
        public int repairserviceid { get; set; }
        public int id { get; set; }
        public decimal price { get; set; }
        public string name { get; set; }
        public string unit { get; set; }

    }

[civilman]

前台代码是这个，CSDN把我加颜色的代码加上去了。

<dx:ASPxGridView ID="ASPxGridViewService" runat="server" AutoGenerateColumns="False"
KeyFieldName="id" Width="833px">
<SettingsBehavior AllowDragDrop="False" AllowGroup="False" AllowSort="False" />
<Columns>
<dx:GridViewDataTextColumn FieldName="id" ReadOnly="True" VisibleIndex="0" Width="10px"
Caption="序号">
</dx:GridViewDataTextColumn>
<dx:GridViewDataComboBoxColumn FieldName="repairserviceid" VisibleIndex="2" Caption="项目名称"
Width="600px">
<DataItemTemplate>
<dx:ASPxComboBox ID="ASPxComboBoxname" runat="server" CallbackPageSize="10" ValueType="System.String"
TextField="name" ValueField="repairserviceid" Width="400px" DropDownStyle="DropDown">
</dx:ASPxComboBox>
</DataItemTemplate>
</dx:GridViewDataComboBoxColumn>
</Columns>
<SettingsBehavior AllowDragDrop="False" AllowSort="False" AllowGroup="False"></SettingsBehavior>
<SettingsPager Visible="False" Mode="ShowAllRecords">
</SettingsPager>
</dx:ASPxGridView>