大家来看看我的代码有什么问题

一个页面中有一个dropdownlist ddlDepartment和一个gridview GridviewAuditZB，我要通过ddlDepartment得到depId，再通过Gridview显示该depId对应的纪录，出现的问题是GridView没有显示，DEBUG调试又查不出错public partial class AuditReportPage : System.Web.UI.Page
{
    PRO_ZB _zb = null;//
    PRO_DEPARTMENT _depart = null;//
    /// <summary>
    /// Page_load事件，调用绑定ddlDepartment方法
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BindDdlDepartment();
        }
    }
    /// <summary>
    /// 绑定ddlDepartment方法
    /// </summary>
    protected void BindDdlDepartment()
    {
        _depart = new PRO_DEPARTMENT();
        ddlDepartment.DataSource = _depart.GetAllDepartInfo().Tables[0].DefaultView;
        ddlDepartment.DataTextField = "DEPARTMENT";
        ddlDepartment.DataValueField = "DEPARTMENT";
        ddlDepartment.DataBind();
    }
    /// <summary>
    /// 绑定GridviewAuditZB方法
    /// </summary>
    /// <param name="depId"></param>
    protected void BindGrid(long depId)
    {
        _zb = new PRO_ZB();
        DataSet ds = _zb.GetZBByWeekStaAndDepId(0, depId);
        if (ds.Tables[0].Rows.Count==0)
        {
            DataRow row = ds.Tables[0].NewRow();
            row["ZBID"] = 0;
            ds.Tables[0].Rows.Add(row);
        }
        GridViewAuditZB.DataSource = ds.Tables[0].DefaultView;
        GridViewAuditZB.DataBind();
    }
    /// <summary>
    /// ddlDepartment的selectIndexChanged事件，调用绑定GridviewAuditZB方法
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void ddlDepartment_SelectedIndexChanged(object sender, EventArgs e)
    {
        _depart = new PRO_DEPARTMENT();
        string depname = ddlDepartment.SelectedValue;
        long depId = _depart.GetIdByName(depname);
        if(depId>0)
        {
            BindGrid(depId);
        }
    }
}页面代码
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="DepartAuditReportPage.aspx.cs" Inherits="AuditReportPage" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>无标题页</title>
    <link href="StyleSheet.css" rel="stylesheet" type="text/css" />
</head>
<body topmargin="35px">
    <form id="form1" runat="server">
    <div class="main">
        <table style="width: 760px; height: 1px" id="mainTable">
            <tr>
                <td align="center" colspan="3" style="height: 36px; width: 100%; background-color: #507cd1;">
                    <strong><span style="font-size: 16pt; color: #ffffff;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;
                    报表审核</span></strong></td>
            </tr>
            <tr>
                <td align="right" colspan="3" rowspan="1" style="width: 100%; height: 19px" valign="top">
                    <asp:DropDownList ID="ddlDepartment" runat="server" OnSelectedIndexChanged="ddlDepartment_SelectedIndexChanged">
                    </asp:DropDownList></td>
            </tr>
            <tr>
                <td colspan="3" style="height: 184px; width: 100%;" rowspan="1" valign="top" align="right">
                    &nbsp;<asp:GridView ID="GridViewAuditZB" runat="server" AutoGenerateColumns="False" Height="100%" Width="100%" CellPadding="1" ForeColor="#333333" GridLines="None" BackColor="#E0E0E0" BorderWidth="1px" CaptionAlign="Right" CellSpacing="1" PageSize="25">
                        <Columns>
                            <asp:TemplateField HeaderText="报表编号">
                                <ItemTemplate>
                                    &nbsp;&nbsp;
                                    <asp:HyperLink ID="linkZBID" runat="server" NavigateUrl='<%# "~/AuditWeeklyReportDetail.aspx?zbId="+DataBinder.Eval(Container, "DataItem.ZBID") %>'
                                        Text='<%# Eval("ZBID") %>'></asp:HyperLink>
                                </ItemTemplate>
                                <ItemStyle HorizontalAlign="Center" Width="10%" />
                                <HeaderStyle HorizontalAlign="Center" />
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="汇报人">
                                <ItemTemplate>
                                    <%#Eval("USERNAME")%>
                                </ItemTemplate>
                                <ItemStyle HorizontalAlign="Center" Width="15%" />
                                <HeaderStyle HorizontalAlign="Center" />
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="汇报时间（周）">
                                <ItemTemplate>
                                    <%#Eval("WEEKNUM")%>
                                </ItemTemplate>
                                <ItemStyle HorizontalAlign="Center" Width="15%" />
                                <HeaderStyle HorizontalAlign="Center" />
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="工作开始时间">
                                <ItemTemplate>
                                    <%#Eval("WEEKSTART")%>
                                </ItemTemplate>
                                <ItemStyle HorizontalAlign="Center" Width="30%" />
                                <HeaderStyle HorizontalAlign="Center" />
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="工作结束时间">
                                <ItemTemplate>
                                    <%#Eval("WEEKEND")%>
                                </ItemTemplate>
                                <ItemStyle HorizontalAlign="Center" Width="30%" />
                                <HeaderStyle HorizontalAlign="Center" />
                            </asp:TemplateField>
                        </Columns>
                        <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
                        <RowStyle BackColor="#EFF3FB" />
                        <EditRowStyle BackColor="#EFF3FB" BorderColor="#E0E0E0" BorderStyle="None" />
                        <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
                        <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
                        <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
                        <AlternatingRowStyle BackColor="White" />
                    </asp:GridView>
                </td>
            </tr>
        </table>
    
    </div>
    </form>
</body>
</html>

解决方案 »

  1.   

    <asp:DropDownList ID="ddlDepartment" runat="server" OnSelectedIndexChanged="ddlDepartment_SelectedIndexChanged">
                        </asp:DropDownList>少设置一个属性autopostback
      

  2.   

    哦，该死该死，居然忘了设autopostback，谢谢hy_lihuan
      

  3.   

    断点调试,应该ds.Tables[0].Rows.Count==0这句是成立的.所以才没有数据if (ds.Tables[0].Rows.Count==0)
            {
                DataRow row = ds.Tables[0].NewRow();
                row["ZBID"] = 0;
                ds.Tables[0].Rows.Add(row);
                              
            }
      

  4.   

    设置dropdownlist   ddlDepartment中的autopostback="true",这样才能自动将数据返回服务器