C# 一些动态下拉列表不'；t update--autopostback=true

我有一个网页，只出现了一些下拉列表的问题。如图所示，autopostback=true，是的，我正在考虑！发回

业务线、董事和代理人均无任何问题发回，但高级经理和经理以列表中的第一个值发回，无论选择如何

这是asp

<asp:TableRow>
            <asp:TableCell CssClass="tc1" Width="17%">
                <asp:Label ID="lblLob" runat="server">Line Of Business: </asp:Label>              
            </asp:TableCell>
            <asp:TableCell CssClass="tc1">
                <asp:DropDownList ID="cmbLoB" runat="server" AutoPostBack="true" OnSelectedIndexChanged="reSelect"></asp:DropDownList>   
                 <asp:RequiredFieldValidator ID="rfvLoB" runat="server" ControlToValidate="cmbLoB" InitialValue="0" ErrorMessage="Please select a Line of Business"></asp:RequiredFieldValidator>                   
            </asp:TableCell>
        </asp:TableRow>
        <asp:TableRow>       
            <asp:TableCell ID="tcRange" CssClass="tc1" runat="server" Width="15%">            
                <asp:Label ID="lblDateRange" runat="server">Report Range: </asp:Label>            
            </asp:TableCell>
            <asp:TableCell CssClass="tc1">
                <asp:DropDownList ID="cmbDateRange" runat="server" AutoPostBack="true" OnSelectedIndexChanged="reSelect"></asp:DropDownList>
            </asp:TableCell>
        </asp:TableRow>    
        <asp:TableRow>
        <asp:TableCell CssClass="tc1"><asp:Label ID="lblStartDate" runat="server" Text="Start Date: "></asp:Label></asp:TableCell>
        <asp:TableCell CssClass="tc2"><asp:TextBox ID="txtStartDate" runat="server" AutoPostBack="true"></asp:TextBox><asp:CalendarExtender
                ID="calStartDate" runat="server" TargetControlID="txtStartDate" Format="yyyy-MM-dd">
            </asp:CalendarExtender>
        </asp:TableCell>
        <asp:TableCell CssClass="tc1"><asp:Label ID="lblEndDate" runat="server" Text="End Date: "></asp:Label></asp:TableCell>
        <asp:TableCell CssClass="tc2"><asp:TextBox ID="txtEndDate" runat="server" AutoPostBack="true"></asp:TextBox><asp:CalendarExtender
                ID="calEndDate" runat="server" TargetControlID="txtEndDate" Format="yyyy-MM-dd"></asp:CalendarExtender>
        </asp:TableCell>
        </asp:TableRow>        
        <asp:TableRow>
            <asp:TableCell CssClass="tc1" Width="17%">
                <asp:Label ID="lblDirector" runat="server">Senior Leader: </asp:Label>              
            </asp:TableCell>
            <asp:TableCell CssClass="tc1">
                <asp:DropDownList ID="cmbDirector" runat="server" AutoPostBack="true" OnSelectedIndexChanged="reSelect"></asp:DropDownList>                      
            </asp:TableCell>    
            <asp:TableCell CssClass="tc1" Width="17%" ID="tdlblAggregate" runat="server" Visible="false">
                <asp:Label ID="lblAggregate" runat="server">Aggregation Level: </asp:Label>              
            </asp:TableCell>
            <asp:TableCell CssClass="tc1" ID="tdcmbAggregate" runat="server" Visible="false">
                <asp:DropDownList ID="cmbAggregate" runat="server" AutoPostBack="true" OnSelectedIndexChanged="reSelect">
                <asp:ListItem Value="LoB" Text="Segment"></asp:ListItem>
                <asp:ListItem Value="SM" Text="Senior Manager"></asp:ListItem>
                </asp:DropDownList>                      
            </asp:TableCell>
        </asp:TableRow> 
        <asp:TableRow>           
            <asp:TableCell CssClass="tc1">
                <asp:Label ID="lblSManager" Visible="true" runat="server">Senior Manager: </asp:Label>              
            </asp:TableCell>
            <asp:TableCell CssClass="tc1">
                <asp:DropDownList ID="cmbSManager" runat="server" AutoPostBack="true" OnSelectedIndexChanged="reSelect"></asp:DropDownList>                      
            </asp:TableCell>
        </asp:TableRow> 
        <asp:TableRow>            
            <asp:TableCell CssClass="tc1">
                <asp:Label ID="lblManager" Visible="true" runat="server">Manager: </asp:Label>              
            </asp:TableCell>
            <asp:TableCell CssClass="tc1">
                <asp:DropDownList ID="cmbManager" runat="server" AutoPostBack="true" OnSelectedIndexChanged="reSelect"></asp:DropDownList>                      
            </asp:TableCell>
        </asp:TableRow>
        <asp:TableRow>            
            <asp:TableCell CssClass="tc1">
                <asp:Label ID="lblAgent" Visible="true" runat="server">Associate/Specialist: </asp:Label>              
            </asp:TableCell>
            <asp:TableCell CssClass="tc1">
                <asp:DropDownList ID="cmbAgent" runat="server" AutoPostBack="true" Visible="true" OnSelectedIndexChanged="reSelect"></asp:DropDownList>                      
            </asp:TableCell>
        </asp:TableRow>

---

很可能您的一个实际选项的值也为0，因此当页面刷新时，下拉列表的选定值为0，这也是默认的“选择一个”选项的值。

是数据绑定，被调用！Page.Postback…？我发布的所有内容都在asp代码中注明的“重新选择”中处理。我已经三次检查了我没有进入“重新选择”的回发。我们在看什么方法？发布完整的代码（方法应包括签名、任何javascript等）更有益，使其更有用。请发布在浏览器中为这些下拉列表生成的HTML。为什么在每个下拉列表上都有自动回写。您只需要在页面中的一个控件上使用它。这导致每次您在这些下拉列表上执行任何操作时，页面都会发回服务器。非常接近，令人尴尬的是，我让高级经理和经理字段都使用相同的ID。修复了，现在一切都很顺利。

            DataTable SLTSelectDistinct = SLTSelect.DefaultView.ToTable(true, "sltID", "sltName");
            DataView sltSelect = new DataView(SLTSelectDistinct);
            DataRow sltRow = SLTSelectDistinct.NewRow();
            sltRow[0] = "0";
            sltRow[1] = "-- Please Select --";
            SLTSelectDistinct.Rows.Add(sltRow);

            sltSelect.Sort = "sltName";
            cmbDirector.DataValueField = "sltID";
            cmbDirector.DataTextField = "sltName";
            cmbDirector.DataSource = sltSelect;
            cmbDirector.DataBind();

            DataTable SMSelectDistinct = SMSelect.DefaultView.ToTable(true, "smID", "smName");
            DataView smSelect = new DataView(SMSelectDistinct);
            DataRow smRow = SMSelectDistinct.NewRow();
            smRow[0] = "0";
            smRow[1] = "-- Please Select --";
            SMSelectDistinct.Rows.Add(smRow);

            smSelect.Sort = "smName";
            cmbSManager.DataValueField = "smID";
            cmbSManager.DataTextField = "smName";
            cmbSManager.DataSource = smSelect;
            cmbSManager.DataBind();

            DataTable MSelectDistinct = MSelect.DefaultView.ToTable(true, "mID", "mName");
            DataView mSelect = new DataView(MSelectDistinct);
            DataRow mRow = MSelectDistinct.NewRow();
            mRow[0] = "0";
            mRow[1] = "-- Please Select --";
            MSelectDistinct.Rows.Add(mRow);

            mSelect.Sort = "mName";
            cmbManager.DataValueField = "mID";
            cmbManager.DataTextField = "mName";
            cmbManager.DataSource = mSelect;
            cmbManager.DataBind();

            DataTable ASelectDistinct = LoBSelect.DefaultView.ToTable(true, "C_AGT", "aName");
            DataView aSelect = new DataView(ASelectDistinct);
            DataRow aRow = ASelectDistinct.NewRow();
            aRow[0] = "0";
            aRow[1] = "-- Please Select --";
            ASelectDistinct.Rows.Add(aRow);

            aSelect.Sort = "aName";
            cmbAgent.DataValueField = "C_AGT";
            cmbAgent.DataTextField = "aName";
            cmbAgent.DataSource = aSelect;
            cmbAgent.DataBind();