updatepanel中的dropdownlist不停的刷新

Question

我在updatepanel中写了个dropdownlist，但是显示出来的让我快哭了，数据没了不说，而且点开还自动缩回去了，不知道咋整了

Answer 1

我在updatepanel中写了个dropdownlist，但是显示出来的让我快哭了，数据没了不说，而且点开还自动缩回去了，不知道咋整了

请尝试：

1）把Dropdownlist绑定到一个数据源，或者在Page_Load中设置其DataSource+调用DataBind方法绑定到下拉列表。

2）然后把这个下拉列表扔到UpdatePanel中。

3）把下拉列表AutoPostBack=True即可。

实在不行，请给出你的代码（包含cs和aspx部分）。谢谢了……

---

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Answer 2

同意楼上观点

---

郭哲

Answer 3

建议给出代码..帮你检查下哪里有问题！

Answer 4

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="user.ascx.cs" Inherits="Admin_user"  EnableViewState="false"%>
<fieldset style="overflow: hidden; zoom: 1; margin-top: 10px; background-color: #f5f7f8; padding: 10px">
    <legend style="background: url(images/icon42.jpg) no-repeat 6px 50%; font-weight: bold; line-height: 45px; padding-left: 60px">成员管理</legend>
    <div style="text-align:center;">
        <div style="text-align: left;">
            <a href="#" style="text-decoration:none; color:#000000;" class="od" onclick="show('fd');return false;">添加新用户</a>
            <%--<a href="javascript://" onclick="jBox.open('div-jBoxID','div','fd','修改密码','width=280,height=400,center=true,minimizable=true,resize=true,draggable=true,model=true');"
                style="text-decoration: none; color: #000000;" class="od">
                添加新用户</a>--%>
            
        </div>
        <div id="fd" style="display: none;filter: alpha(opacity=100); opacity: 1;" >
            <div id="module_list" style="text-align: right; height: 15px; filter: alpha(opacity=100); opacity: 1;">
                <a href="#" style="text-decoration:none; color:Black;" onclick="closeed('fd');return false;">关闭</a>
            </div>
           <%-- <div id="AddNewUsers" style="display: none; filter: alpha(opacity=100); opacity: 1;">--%>
            
            <div></div>
            <fieldset style="overflow: hidden; zoom: 1; margin-top: 10px; background-color: #EDF1F8; padding: 10px">
                <legend style="background: url(images/icon42.jpg) no-repeat 6px 50%; font-weight: bold; line-height: 45px; padding-left: 60px">添加新用户</legend>
                    <table border="0" cellpadding="0" cellspacing="0">
                        <tr>
                            <td>
                                用&nbsp;&nbsp;户&nbsp;&nbsp;名：</td>
                            <td><asp:TextBox ID="AddUserName" Width="180px" runat="server" EnableViewState="false"></asp:TextBox></td>
                            <td><font color="red">*</font></td>
                        </tr>
                        <tr>
                            <td>
                                密&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;码：</td>
                            <td><asp:TextBox ID="AddUserPwd" runat="server" Width="180px" TextMode="Password" ></asp:TextBox></td>
                            <td><font color="red">*</font></td>
                        </tr>
                        <tr>
                            <td>
                                真实姓名：
                            </td>
                            <td>
                               
                                <asp:TextBox ID="AddTrueName" runat="server" Width="180px"></asp:TextBox>
                            </td>
                            <td>
                                <font color="red">*</font>
                            </td>
                        </tr>
                        <tr>
                            <td>
                                性&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;别：</td>
                            <td align="left">
                                <asp:DropDownList ID="AddUserSex" runat="server">
                                    <asp:ListItem>男</asp:ListItem>
                                    <asp:ListItem>女</asp:ListItem>
                                </asp:DropDownList>
                            </td>
                            <td><font color="red">*</font></td>
                        </tr>
                        
                        <tr>
                            <td>
                                年&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;龄：</td>
                            <td align="left">
                                <asp:TextBox ID="AddUserAge" Width="35px" runat="server" EnableViewState="false"></asp:TextBox>
                            </td>
                            <td><font color="red">*</font></td>
                        </tr>
                        <tr>
                            <td>出生日期：</td>
                            <td align="left">
                                <asp:TextBox ID="AddUserbirthday" runat="server" Width="180px" EnableViewState="false"></asp:TextBox>
                            </td>
                            <td><font color="red">*</font></td>
                        </tr>
                        <tr>
                            <td>手机号码：</td>
                            <td align="left">
                                <asp:TextBox ID="AddUserPhone" runat="server" Width="180px"></asp:TextBox>
                            </td>
                            <td><font color="red">*</font></td>
                        </tr>
                        <tr>
                            <td>电子邮箱：</td>
                            <td align="left">
                                <asp:TextBox ID="AddUserEmail" runat="server" Width="180px" 
                                validationExpression="^[/w-]+(/.[/w-]+*@[/w-]+(/.[/w=]+)+$"></asp:TextBox>
                            </td>
                            <td><font color="red">*</font></td>
                        </tr>
                        <tr>
                            <td>所在部门：</td>
                            <td align="left">
                                <%--<asp:ScriptManagerProxy ID="ScriptManagerProxy1" runat="server"></asp:ScriptManagerProxy>--%>
                                <asp:UpdatePanel ID="DepName" runat="server">
                                    <ContentTemplate>
                                        <asp:DropDownList ID="AddUserDepName" runat="server" AutoPostBack="true" DataTextField="DepName"
                                            DataValueField="DepartmentID" onselectedindexchanged="AddUserDepName_SelectedIndexChanged"></asp:DropDownList>
                                        <asp:Label ID="lable1" Visible="false" runat="server"></asp:Label>
                                    </ContentTemplate>
                                </asp:UpdatePanel>
                                <%--<asp:SqlDataSource ID="AddUsers" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
                                    SelectCommand="SELECT [DepName] FROM [Accounts_Department]"></asp:SqlDataSource>--%>
                            </td>
                            <td><font color="red">*</font></td>
                        </tr>
                        <tr>
                            <td>用户类别：
                            </td>
                            <td align="left">
                                <asp:UpdatePanel ID="UserTyoe" runat="server">
                                    <ContentTemplate>
                                        <asp:DropDownList ID="AddUserType" runat="server" AutoPostBack="true" ></asp:DropDownList>
                                    </ContentTemplate>
                                </asp:UpdatePanel>
                            </td>
                            <td><font color="red">*</font></td>
                        </tr>
                        <tr>
                            <td colspan="3">
                               <asp:Button ID="SaveInfomation" Text="保存" runat="server" 
                                    onclick="SaveInfomation_Click" />&nbsp;&nbsp;&nbsp;&nbsp;
                               <asp:Button ID="Cancle" Text="取消" runat="server" OnClientClick="closeed('fd');return false; " />
                            </td>
                            
                        </tr>
                    </table>
            </fieldset>
            </div>
        </div>
        <script type="text/javascript">
            var prox;
            var proy;
            var proxc;
            var proyc;
            function show(id) {/*--打开--*/
                clearInterval(prox);
                clearInterval(proy);
                clearInterval(proxc);
                clearInterval(proyc);
                var o = document.getElementById(id);
                o.style.display = "block";
                o.style.width = "1px";
                o.style.height = "1px";
                prox = setInterval(function () { openx(o, 350) }, 10);
            }
            function openx(o, x) {/*--打开x--*/
                var cx = parseInt(o.style.width);
                if (cx < x) {
                    o.style.width = (cx + Math.ceil((x - cx) / 5)) + "px";
                }
                else {
                    clearInterval(prox);
                    proy = setInterval(function () { openy(o, 345) }, 10);
                }
            }
            function openy(o, y) {/*--打开y--*/
                var cy = parseInt(o.style.height);
                if (cy < y) {
                    o.style.height = (cy + Math.ceil((y - cy) / 5)) + "px";
                }
                else {
                    clearInterval(proy);
                }
            }
            function closeed(id) {/*--关闭--*/
                clearInterval(prox);
                clearInterval(proy);
                clearInterval(proxc);
                clearInterval(proyc);
                var o = document.getElementById(id);
                if (o.style.display == "block") {
                    proyc = setInterval(function () { closey(o) }, 10);
                }
            }
            function closey(o) {/*--打开y--*/
                var cy = parseInt(o.style.height);
                if (cy > 0) {
                    o.style.height = (cy - Math.ceil(cy / 5)) + "px";
                }
                else {
                    clearInterval(proyc);
                    proxc = setInterval(function () { closex(o) }, 10);
                }
            }
            function closex(o) {/*--打开x--*/
                var cx = parseInt(o.style.width);
                if (cx > 0) {
                    o.style.width = (cx - Math.ceil(cx / 5)) + "px";
                }
                else {
                    clearInterval(proxc);
                    o.style.display = "none";
                }
            }
            ////////////////////////////////////////////////////
          
            /*$(function (e) {
                $("m_title").bind('mouseover', function () {
                    $(this).css("cursor", "move")
                });
                var $show = $("#loader");
                var $orderlist = $("#orderkist");
                var $list = $("module_list");
                $list.sortable({
                    opacity:0.6,//设置拖动时候的透明度
                    revert:true,//缓冲效果
                    cursor:'move',//拖动的时候鼠标样式
                    handle:'m_title',//可以拖动的部位，标题部分
                });
            });
            */
           
            /*-------------------------鼠标拖动---------------------*/
           /* var od = document.getElementById("fd");
            var dx, dy, mx, my, mouseD;
            var odrag;
            var isIE = document.all ? true : false;
            document.onmousedown = function (e) {
                var e = e ? e : event;
                if (e.button == (document.all ? 1 : 0)) {
                    mouseD = true;
                }
            }
            document.onmouseup = function () {
                mouseD = false;
                odrag = "";
                if (isIE) {
                    od.releaseCapture();
                    od.filters.alpha.opacity = 100;
                }
                else {
                    window.releaseEvents(od.MOUSEMOVE);
                    od.style.opacity = 1;
                }
               
            }
            //function readyMove(e){ 
            od.onmousedown = function (e) {
                odrag = this;
                var e = e ? e : event;
                if (e.button == (document.all ? 1 : 0)) {
                    mx = e.clientX;
                    my = e.clientY;
                    od.style.left = od.offsetLeft + "px";
                    od.style.top = od.offsetTop + "px";
                    if (isIE) {
                        od.setCapture();
                        od.filters.alpha.opacity = 50;
                    }
                    else {
                        window.captureEvents(Event.MOUSEMOVE);
                        od.style.opacity = 0.5;
                    }
                    //alert(mx);
                    //alert(my);
                }
            }
            document.onmousemove = function (e) {
                var e = e ? e : event;
                //alert(mrx);
                //alert(e.button);  
                if (mouseD == true && odrag) {
                    var mrx = e.clientX - mx;
                    var mry = e.clientY - my;
                    od.style.left = parseInt(od.style.left) + mrx + "px";
                    od.style.top = parseInt(od.style.top) + mry + "px";
                    mx = e.clientX;
                    my = e.clientY;
                }
            }
            */
 
        </script>
        <asp:Label ID="value" runat="server"></asp:Label>
        <br />
        <asp:ScriptManagerProxy ID="SMP1" runat="server"></asp:ScriptManagerProxy>
        
        <asp:GridView ID="UserMeng" runat="server"  AutoGenerateColumns="False"  
        BackColor="White" BorderColor="#CCCCCC"  EmptyDataText="暂无数据"  onrowdeleting="UserMeng_RowDeleting"  
        onrowcancelingedit="UserMeng_RowCancelingEdit"  
        onrowediting="UserMeng_RowEditing" onrowupdating="UserMeng_RowUpdating" 
        PageSize="30" onrowdatabound="UserMeng_RowDataBound">
         
            <Columns>
            
            
            <asp:TemplateField>
                <ItemTemplate>
                    <asp:CheckBox ID="select" runat="server" />
                </ItemTemplate>
                <HeaderStyle Width="15px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
                <ItemStyle Width="15px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
            </asp:TemplateField>
            <%--<asp:BoundField DataField="UserName" HeaderText="用户名">
                <HeaderStyle Width="150px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
                <ItemStyle Width="150px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
            </asp:BoundField>--%>
            <asp:TemplateField HeaderText="用户名">
                <ItemTemplate>
                    <%#Eval("UserName") %>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="NameText" runat="server" Text='<%#Eval("UserName") %>' Width="150px"></asp:TextBox>
                </EditItemTemplate>
                <HeaderStyle Width="150px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
                <ItemStyle Width="150px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
            </asp:TemplateField>
                
            <asp:TemplateField HeaderText="真实姓名">
                <ItemTemplate>
                    <%# Eval("TrueName") %>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="TrueNameText" runat="server" Text='<%#Eval("TrueName") %>' Width="150px"></asp:TextBox>
                </EditItemTemplate>
                <HeaderStyle Width="150px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
                <ItemStyle Width="150px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa"/>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="性别">
                <ItemTemplate>
                    <%--<asp:DropDownList ID="SexDDL" DataValueField="性别" DataTextField="性别" Visible="false"  runat="server"></asp:DropDownList>--%>
                    <%# Eval("Sex") %>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:DropDownList ID="SexDD" runat="server">
                        <asp:ListItem>男</asp:ListItem>
                        <asp:ListItem>女</asp:ListItem>
                    </asp:DropDownList>
                </EditItemTemplate>
                <HeaderStyle Width="80px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
                <ItemStyle Width="80px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
            </asp:TemplateField>
            
            <asp:TemplateField HeaderText="年龄">
                <ItemTemplate>
                    <%# Eval("Age") %>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="AgeText" runat="server" Text='<%#Eval("Age") %>' Width="70px"></asp:TextBox>
                </EditItemTemplate>
                <HeaderStyle Width="70px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
                <ItemStyle Width="70px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
            </asp:TemplateField>
            <asp:BoundField DataField="BirthDay" HeaderText="出生日期" DataFormatString="{0:yyyy-MM-dd}" HtmlEncode="false">
                <HeaderStyle Width="130px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
                <ItemStyle Width="130px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
            </asp:BoundField>
            <%--<asp:TemplateField HeaderText="出生日期">
                <ItemTemplate>
                    <%# Eval("BirthDay") %>
                </ItemTemplate>
                <HeaderStyle Width="130px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
                <ItemStyle Width="130px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
            </asp:TemplateField>--%>
            
            <asp:TemplateField HeaderText="手机号码 ">
                <ItemTemplate>
                    <%#Eval("Phone") %>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="PhoneText" runat="server" Text='<%#Eval("Phone") %>' Width="150px"></asp:TextBox>
                </EditItemTemplate>
                <HeaderStyle Width="150px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
                <ItemStyle Width="150px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
            </asp:TemplateField>
           
            <asp:TemplateField HeaderText="E-Mail">
                <ItemTemplate>
                    <%# Eval("Email") %>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="EmailText" runat="server" Text='<%#Eval("Email") %>' Width="150px"></asp:TextBox>
                </EditItemTemplate>
                <HeaderStyle Width="150px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
                <ItemStyle Width="150px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
            </asp:TemplateField>
            
            <asp:TemplateField HeaderText=" 所在部门">
                <ItemTemplate>
                  
                 <%#Eval("DepartmentID") %>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:HiddenField ID="DepNameHDF" runat="server" Value='<%#Eval("DepartmentID") %>' />
                    <asp:DropDownList ID="DepNameDDL" runat="server" Width="180px"></asp:DropDownList>
                </EditItemTemplate>
                <HeaderStyle Width="180px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
                <ItemStyle Width="180px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="用户类别">
                <ItemTemplate>
                    <%# Eval("UserType") %>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:HiddenField ID="UserTypeHDF" runat="server" Value='<%#Eval("UserType") %>' />
                    <asp:DropDownList ID="UserTypeDDL" runat="server" Width="120px"></asp:DropDownList>
                </EditItemTemplate>
                <HeaderStyle Width="120px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
                <ItemStyle Width="120px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
            </asp:TemplateField>
            <asp:CommandField HeaderText="操作" ShowEditButton="true" ShowDeleteButton="true">
                <HeaderStyle Width="180px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
                <ItemStyle Width="180px" BorderStyle="Solid" BorderWidth="1px" BorderColor="#9BD1Fa" />
            </asp:CommandField>
    
          </Columns>
            <SelectedRowStyle BackColor="#669999" Font-Bold="true" ForeColor="White" />
            <RowStyle ForeColor="#000066" />
            <PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Center" />
            <HeaderStyle BackColor="#006699" Font-Bold="true" ForeColor="White" CssClass="Freezing" Font-Size="15px" />
            <FooterStyle BackColor="White" ForeColor="000066" />
        </asp:GridView>
       
        <div style="text-align:left; padding-top:5px; height:25px; line-height:25px;">
            <asp:CheckBox ID="SelectALL" runat="server" AutoPostBack="true" Text="全选"  OnCheckedChanged="SelectALL_CheckChaned" align="left"/>
            &nbsp;
            <asp:Button ID="canel" runat="server" Text="取消" />&nbsp;
            <asp:Button ID="Delete" runat="server" Text="删除" />
        </div>
        
        <div style="text-align: left; padding-top: 10px; color: #000066;">
            <asp:LinkButton ID="FirstPage" Text="首页" Style="text-decoration: none; color: #000066;"
                runat="server"></asp:LinkButton>&nbsp;
            <asp:LinkButton ID="PrePage" Text="上一页" Style="text-decoration: none; color: #000066;"
                runat="server"></asp:LinkButton>&nbsp;
            <asp:LinkButton ID="NextPage" Text="下一页" Style="text-decoration: none; color: #000066;"
                runat="server"></asp:LinkButton>&nbsp;
            <asp:LinkButton ID="LastPge" Text="末页" Style="text-decoration: none; color: #000066;"
                runat="server"></asp:LinkButton>&nbsp; 第<asp:Label ID="ThisPage" runat="server"></asp:Label>页&nbsp;
            共<asp:Label ID="SubPage" runat="server"></asp:Label>页&nbsp; 共<asp:Label ID="RecordCount"
                runat="server"></asp:Label>条数据
        </div>
        </asp:UpdatePanel>
    </div>
</fieldset>

using System;
using System.Data;
using System.Data.Sql;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.SessionState;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text;
using System.Security.Cryptography;
using Common;
using DBUtility;
using BLL;
using DAL;
public partial class Admin_user : System.Web.UI.UserControl
{
     
    protected void Page_Load(object sender, EventArgs e)
    {
       // GdBind();
        //AddUserDepNameBind();
        //AddUserTypeBind();
        //Response.Write(SQLHelper.connectionString);
        if (!IsPostBack)
        {
            
            AddUserDepNameBind();
            AddUserTypeBind();
            GdBind();
            //Response.Write(this.AddUserDepName.SelectedValue);
            //this.AddUserDepName.AutoPostBack = true;
            value.Text = this.AddUserDepName.Items[9].ToString() + "  " + this.AddUserDepName.Items[9].Value;
        }
    }
    private void AddUserTypeBind()//UserType数据绑定
    {
        try
        {
            BLL.Accounts_Roles bll = new BLL.Accounts_Roles();
            DataSet ds = bll.GetAllList();
            this.AddUserType.DataSource = ds.Tables[0];
            this.AddUserType.DataTextField = "Description";
            this.AddUserType.DataValueField = "RoleID";
            this.AddUserType.DataBind();
        }
        catch (Exception ex)
        {
            Response.Write("数据库错误，错误原因：" + ex.Message);
            Response.End();
        }
    }
    private void AddUserDepNameBind()//UserDepName数据绑定
    {
        try
        {
            BLL.Accounts_Department bll = new BLL.Accounts_Department();
            DataSet ds = bll.GetAllList();
            this.AddUserDepName.DataSource = ds.Tables[0];
            this.AddUserDepName.DataTextField = "DepName";
            this.AddUserDepName.DataValueField = "DepartmentID";
            this.AddUserDepName.DataBind();
            
        }
        catch (Exception ex)
        {
            Response.Write("数据库错误，错误原因：" + ex.Message);
            Response.End();
        }
    }
    
    public void GdBind()//GridView数据绑定
    {
        try
        {
             BLL.Accounts_Users bll = new BLL.Accounts_Users();
            DataSet ds = bll.GetAllList();
            UserMeng.DataSource = ds;
            UserMeng.DataKeyNames = new string[] { "UserID" };
            UserMeng.DataBind();
        }
        catch (Exception ex)
        {
            Response.Write("数据库错误，错误原因：" + ex.Message);
            Response.End();
        }
       
    }
    //科室显示，不显示数字，显示在对应数据库中的文本数据
    /*public string Dep_Name(int DepartmentID)
    {
        BLL.Accounts_Department bll = new BLL.Accounts_Department();
        bll.GetName(DepartmentID);
        return Dep_Name(DepartmentID);
    }*/
    protected void SelectALL_CheckChaned(object sender, EventArgs e)
    {
        for (int i = 0; i <=UserMeng.Rows.Count-1; i++)
        {
            CheckBox cbox = (CheckBox)UserMeng.Rows[i].FindControl("select");
            if (SelectALL.Checked == true)
            {
                cbox.Checked = true;
            }
            else
            {
                cbox.Checked = false;
            }
        }
    }
    public static byte[] EncryptPassword(string password) 
    { 
        byte[] bytes = new UnicodeEncoding().GetBytes(password);
        SHA1 sha = new SHA1CryptoServiceProvider(); 
        return sha.ComputeHash(bytes);
    }
    protected void SaveInfomation_Click(object sender, EventArgs e)
    {
        
        string strError = "";
        if (this.AddUserName.Text.Trim().Length==0)
        {
            strError += "用户名不能为空！\\n";
        }
        if (this.AddUserPwd.Text.Trim().Length==0)
        {
            strError += "密码不能为空\\n";
        }
        if (this.AddTrueName.Text.Trim().Length==0)
        {
            strError += "真实姓名不能为空\\n";
        }
        if (!PageValidate.IsNumber(AddUserAge.Text))
        {
            strError += "年龄格式错误\\n";
        }
        if (!PageValidate.IsDateTime(AddUserbirthday.Text))
        {
            strError += "出生日期格式错误\\n";
        }
        if (this.AddUserPhone.Text.Trim().Length==0)
        {
            strError += "电话号码不能为空\\n";
        }
        
        if (this.AddUserEmail.Text.Trim().Length==0)
        {
            strError += "E-Mail不能为空\\n";
        }
        /*string EmailRegex=@"^[/w-]+(/.[/w-]+*@[/w-]+(/.[/w=]+)+$";
        if (Regex.IsMatch(AddUserEmail.Text,EmailRegex))
        {
            Response.Write("<script>alt"+"邮箱格式错误"+"</script>");
        }*/
        if (strError!="")
        {
            MessageBox.Show(this.Page,strError);
           
            return;
          
        }
       // BLL.Accounts_Department Depbll = new BLL.Accounts_Department();
        //定义以及初始化
        string UserName = this.AddUserName.Text;
        //byte[] UserPassword = new UnicodeEncoding().GetBytes(this.AddUserPwd.Text);
        byte[] UserPassword = EncryptPassword(this.AddUserPwd.Text);
        string TrueName = this.AddTrueName.Text;
        string Sex = this.AddUserSex.SelectedValue.ToString();
        int Age = int.Parse(this.AddUserAge.Text);
        DateTime BirthDay = DateTime.Parse(this.AddUserbirthday.Text);
        string Phone = this.AddUserPhone.Text;
        string Email = this.AddUserEmail.Text;
       
        int DepName =Convert.ToInt32( this.AddUserDepName.SelectedItem.Value);
        //int DepName = Convert.ToInt32(lable1.Text);
       
        string UserType = this.AddUserType.SelectedValue.ToString();
        //赋值
       
        Model.Accounts_Users model = new Model.Accounts_Users();
        model.UserName = UserName;
        model.UserPassWord = UserPassword;
        model.TrueName = TrueName;
        model.Sex = Sex;
        model.Age = Age;
        model.BirthDay = BirthDay;
        model.Phone = Phone;
        model.Email = Email;
        model.DepartmentID = DepName;
        model.UserType = UserType;
        //业务逻辑层处理
        BLL.Accounts_Users bll = new BLL.Accounts_Users();
        bll.Add(model);
        Common.MessageBox.ShowAndRedirect(this.Page, "保存成功！", "User.aspx");
    }
    protected void AddUserDepName_SelectedIndexChanged(object sender, EventArgs e)
    {
        //int DepName = Convert.ToInt32(this.AddUserDepName.SelectedValue.ToString());
       // this.AddUserDepName.ClearSelection();
        lable1.Text = AddUserDepName.SelectedItem.Value;
        //AddUserDepNameBind();
    }
    protected void UserMeng_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        BLL.Accounts_Users bll = new BLL.Accounts_Users();
        bll.Delete(Convert.ToInt32(this.UserMeng.DataKeys[e.RowIndex].Value.ToString()));
        GdBind();
    }
    protected void UserMeng_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        Model.Accounts_Users mode = new Model.Accounts_Users();
        BLL.Accounts_Users bll = new BLL.Accounts_Users();
        bll.Update(mode);
        GdBind();
    }
    protected void UserMeng_RowEditing(object sender, GridViewEditEventArgs e)
    {
        UserMeng.EditIndex = e.NewEditIndex;
        GdBind();
    }
    protected void UserMeng_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        UserMeng.EditIndex = -1;
        GdBind();
    }
    //public string KS(int i)
    //{
    //    BLL.Accounts_Department bll = new BLL.Accounts_Department();
    //    bll.GetModel(i).ToString();
    //    return null;
    //}
    protected void UserMeng_RowDataBound(object sender, GridViewRowEventArgs e)
    {
       /* if (e.Row.RowType==DataControlRowType.DataRow)
        {
            if (e.Row.RowState==DataControlRowState.Normal||e.Row.RowState==DataControlRowState.Alternate)
            {
                ((LinkButton)e.Row.Cells[6].Controls[0]).Attributes.Add("onclick", "javascript:return confirm('您确认要删除：/'"  +e.Row.Cells[1].Text+"' / 吗？')");
            }
        }*/
        BLL.Accounts_Department bll=new BLL.Accounts_Department();
        if (((DropDownList)e.Row.FindControl("DepNameDDL"))!=null)
        {
           //生成dropdownlist的值
            DropDownList depnameddl = (DropDownList)e.Row.FindControl("DepNameDDL");
            depnameddl.Items.Clear();
            DataSet ds = bll.GetAllList();
            depnameddl.DataSource = ds.Tables[0];
            depnameddl.DataTextField = "DepName";
            depnameddl.DataValueField = "DepartmentID";
            depnameddl.DataBind();
            //选中dropdownlist
            depnameddl.SelectedValue = ((HiddenField)e.Row.FindControl("DepNameHDF")).Value;
        }
         DropDownList depnameddl1 = (DropDownList)e.Row.FindControl("DepNameDDL");
        
       
        BLL.Accounts_Roles Rolesbll = new BLL.Accounts_Roles();
        if (((DropDownList)e.Row.FindControl("UserTypeDDL"))!=null)
        {
            //生成dropdownlist的值
            DropDownList usertypeddl = (DropDownList)e.Row.FindControl("UserTypeDDL");
            usertypeddl.Items.Clear();
            DataSet ds = Rolesbll.GetAllList();
            usertypeddl.DataSource = ds.Tables[0];
            usertypeddl.DataTextField = "Description";
            usertypeddl.DataValueField = "RoleID";
            usertypeddl.DataBind();
            //选中dropdownlist的值
            usertypeddl.SelectedValue = ((HiddenField)e.Row.FindControl("UserTypeHDF")).Value;
        }
    }
}

Answer 5

首先你把updatepanel容器去掉试试 如果还是空白的 就是代码有问题，还有我感觉你的page_load 你是绑定上去的 你确定会有10个items？

this.AddUserDepName.Items[9].ToString() + "  " + this.AddUserDepName.Items[9].Value

    protected void Page_Load(object sender, EventArgs e)
    {
       // GdBind();
        //AddUserDepNameBind();
        //AddUserTypeBind();
        //Response.Write(SQLHelper.connectionString);
        if (!IsPostBack)
        {
            
            AddUserDepNameBind();
            AddUserTypeBind();
            GdBind();
            //Response.Write(this.AddUserDepName.SelectedValue);
            //this.AddUserDepName.AutoPostBack = true;
            value.Text = this.AddUserDepName.Items[9].ToString() + "  " + this.AddUserDepName.Items[9].Value;
        }
    }

Answer 6

去掉updatepanel容器，dropdownlist加上AutoPostBack=true的话点击就会刷新，一刷新就没了数据就空白了，但是刷新之前就有

Answer 7

首先你把updatepanel容器去掉试试 如果还是空白的 就是代码有问题，还有我感觉你的page_load 你是绑定上去的 你确定会有10个items？

this.AddUserDepName.Items[9].ToString() + "  " + this.AddUserDepName.Items[9].Value

    protected void Page_Load(object sender, EventArgs e)
    {
       // GdBind();
        //AddUserDepNameBind();
        //AddUserTypeBind();
        //Response.Write(SQLHelper.connectionString);
        if (!IsPostBack)
        {
            
            AddUserDepNameBind();
            AddUserTypeBind();
            GdBind();
            //Response.Write(this.AddUserDepName.SelectedValue);
            //this.AddUserDepName.AutoPostBack = true;
            value.Text = this.AddUserDepName.Items[9].ToString() + "  " + this.AddUserDepName.Items[9].Value;
        }
    }

上面的那个是我做测试用的看看有没有既数据，连接是不是正确的

Answer 8

怎么没人帮我啊  ，急死了

Answer 9

上面的那个是我做测试用的看看有没有既数据，连接是不是正确的？

这句话我没理解..

Answer 10

也就是说那个没用，注释掉也是一样的，我是拿他看看数据对不对，有没有数据绑定到dropdownlist中，连接没有问题

Answer 11

怎么没人帮我啊  ，急死了

[e-mail] 

Answer 12

半天没人出来回答我当然急了

Answer 13

半天没人出来回答我当然急了

[e-mail] 发过去问问