gridview里面的checkbox选中后还是false

前台代码<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CopyFrom.aspx.cs" Inherits="Management_CopyFrom" %><!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>Copy From</title>
    <link rel="Stylesheet" href="../Css/mainpanel.css" />
</head>
<body>
    <form id="form1" runat="server">
    <div id="Main">
        <div id="About_top">
            <table cellpadding="0" cellspacing="0">
                <tr>
                    <td align="center" style="background-image: url('../images/tab02.gif'); width: 139px;
                        height: 33px;">
                         Copy From
                    </td>
                    <td style="vertical-align: bottom; height: 1px;">
                        <div id="tab_bg">
                            <img src="../images/tab_bg.gif" alt="" style="width: 576px" /></div>
                    </td>
                </tr>
                <tr>
                    <td colspan="2" style="background-image: url('../images/search_bg.gif'); height: 33px;
                        text-align: left">
                        &nbsp;</td>
                </tr>
            </table>
        </div>
        <div>        
                <asp:GridView ID="GridViewPrivilege" 
                    runat="server" AutoGenerateColumns="False" CellPadding="4" 
                    ForeColor="#333333" GridLines="None" Width="100%" AllowPaging="True" 
                    onpageindexchanging="GridViewPrivilege_PageIndexChanging" 
                    PageSize="6" DataKeyNames="privilegeId">
                    <PagerSettings FirstPageText="第一页" LastPageText="最后一页" NextPageText="下一页" 
                        PreviousPageText="上一页" Mode="NumericFirstLast" />
                <FooterStyle BackColor="#cccccc" />
                <RowStyle BackColor="#ffffff" />
                <Columns>
                    <asp:TemplateField>
                        <ItemTemplate>
                            <asp:CheckBox ID="cbPrivilege" runat="server" />
                            &nbsp;
                        </ItemTemplate>
                        <HeaderStyle Height="24px" Width="5%" />
                        <ItemStyle HorizontalAlign="Center" />
                    </asp:TemplateField>
                    <asp:BoundField DataField="privilegeName" HeaderText="权限名称" >
                        <HeaderStyle Height="24px" />
                        <ItemStyle HorizontalAlign="Center" Width="10%" />
                    </asp:BoundField>
                    <asp:BoundField DataField="description" HeaderText="权限说明">
                        <ItemStyle HorizontalAlign="Center" Width="20%" />
                    </asp:BoundField>
                </Columns>
                <SelectedRowStyle Font-Bold="True" />
                <HeaderStyle BackColor="#aaaaaa" Font-Bold="True" ForeColor="#ffffff" />
                <AlternatingRowStyle BackColor="#eeeeee" />
                </asp:GridView>
            <asp:Label ID="lbDisplay" runat="server" Text=""></asp:Label><br />
                <asp:Button ID="btnConfirm" runat="server" Text="应用" 
                onclick="btnConfirm_Click" />&nbsp;&nbsp;&nbsp;
                                            <asp:Button ID="btnAdd" runat="server" Text="确定" />&nbsp;&nbsp;&nbsp;
                                            <asp:Button ID="btnGiveUp" runat="server" Text="取消" />
        </div>
    </div>
    </form>
</body>
</html>
后台代码protected void btnConfirm_Click(object sender, EventArgs e)
    {
        if (Request.QueryString["uid"] != null )
        {
            string userId = Request.QueryString["uid"];
            int result = 0;
            for (int i = 0; i < GridViewPrivilege.Rows.Count; i++)
            {
                //get select items
                CheckBox cbox = (CheckBox)GridViewPrivilege.Rows[i].FindControl("cbPrivilege");
                if (cbox.Checked == true)
                {
                    string privilegeId = GridViewPrivilege.DataKeys[i].Value.ToString();
                    UserWithPrivilege userPriInfo = new UserWithPrivilege() 
                    {
                        UserId=userId,
                        PrivilegeId=privilegeId,
                        PriGroupId=""
                    };
                    result = priMgt.AddUserPrivilege(userPriInfo);
                }
            }
            if (result==0)
            {
                ClientScript.RegisterClientScriptBlock(this.GetType(), "no", "<script>alert('Add Failed!')</script>");
            }
            else
            {
                ClientScript.RegisterClientScriptBlock(this.GetType(), "yes", "<script>alert('Add successful!')</script>");
            }
        }
    }
为什么当我选中后,CheckBox cbox = (CheckBox)GridViewPrivilege.Rows[i].FindControl("cbPrivilege");cbox.Checked的值还是false。。

解决方案 »

  1.   

    打个断点跟踪下看看，估计你点击按钮时 if (Request.QueryString["uid"] != null )
    这个判断就是null值了。所以你应该在Page_Load事件中页面第一次加载时用ViewState保存传递过来的uid值，然后使用即可。
    public void Page_Load(object sender,EventArgs e)
    {
         if(!IsPostBack)
         {
             ViewState["uid"] = Request.QueryString["uid"];
         }
    }protected void btnConfirm_Click(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(ViewState["uid"].ToString()) )
            {
                string userId = Request.QueryString["uid"];
                int result = 0;
                for (int i = 0; i < GridViewPrivilege.Rows.Count; i++)
                {
                    //get select items
                    CheckBox cbox = (CheckBox)GridViewPrivilege.Rows[i].FindControl("cbPrivilege");
                    if (cbox.Checked == true)
                    {
                        string privilegeId = GridViewPrivilege.DataKeys[i].Value.ToString();
                        UserWithPrivilege userPriInfo = new UserWithPrivilege() 
                        {
                            UserId=userId,
                            PrivilegeId=privilegeId,
                            PriGroupId=""
                        };
                        result = priMgt.AddUserPrivilege(userPriInfo);
                    }
                }
                if (result==0)
                {
                    ClientScript.RegisterClientScriptBlock(this.GetType(), "no", "<script>alert('Add Failed!')</script>");
                }
                else
                {
                    ClientScript.RegisterClientScriptBlock(this.GetType(), "yes", "<script>alert('Add successful!')</script>");
                }
            }
        }
      

  2.   


    有值的而且GridViewPrivilege.Rows.Count也可以得到  也可以找到控件,但是不知道为什么状态一直是false.
      

  3.   

    把断点放这result = priMgt.AddUserPrivilege(userPriInfo);看这个result 的值
      

  4.   

    if (cbox.Checked == true)
                    {
                        string privilegeId = GridViewPrivilege.DataKeys[i].Value.ToString();
                        UserWithPrivilege userPriInfo = new UserWithPrivilege() 
                        {
                            UserId=userId,
                            PrivilegeId=privilegeId,
                            PriGroupId=""
                        };
                        result = priMgt.AddUserPrivilege(userPriInfo);
                    }
    值是false 。if里面都不执行的啊。
      

  5.   

    肯定勾了的,我都调试了好久.找了好多方法都不知道什么情况- -
    有个差不多的页面,调试很正常 CheckBox cbox = (CheckBox)GridViewPrivilege.Rows[i].FindControl("cbPrivilege")可以得到true,但是这里不知道为什么- -、也可以得到gridview的长度,但是一直都是false的状态.
      

  6.   

    我估计是你的Page_Load里少了if(!Page.IsPostBack)if(!Page.IsPostBack)
    {
        //把你的代码放在这里面
    }
      

  7.   

    楼上正解，我也觉得是Load里面少了if(!Page.IsPostBack)
    {
        //第一次加载进行的操作
    }如果还有问题，看看是否没有加载状态视图。 或者再看看autopost属性没有设置。
      

  8.   

    问题解决了是因为我绑定gridview的时候没有把这个写到！ISPOSTBACK里面..
    已经好了。谢谢大家了。