可以帮助我在下面的代码中出错的地方 [英] can some one help me where I went wrong in the following code

问题描述

 <   asp：GridView     ID   =  grdnewUser     runat   =  server    AutoGenerateColumns   =  false    GridLines   = 无 >  
 <  列 > ;  
 <   asp：TemplateField  >  
 <   ItemTemplate  >  
 <   ul    < span class =code-attribute> class   =  last_post >  
 <   li  >  
 <   asp：Labe l     ID   =  lblDateposted   文字  ='  <％ #Eval（  DatePosted）％> '   字体下划线  =  false  
   
                                                                  < span class =code-attribute>                                                      < span class =code-attribute>                   runat   =  server >  <   / asp：标签 >  
 <   / li  >  
 <   li  >  <   strong  > 在：<   / strong  >  
 <   asp：标签    ID   =  Label1   文字  ='  <％ #Eval（  QuestionTitle）％> '   字体下划线  =  false  
   
                                                                                                        < span class =code-attribute>                                   runat   = 服务器 >  <   / asp ：标签 >  
 <   / li  >  
 <   li  >  <   strong  > 按：<   / strong  >  
 <   asp：LinkBut​​ton     ID   =  lnkUsername     runat   =  server   文字  ='  <％ #Eval（  UserName）％> '   字体下划线  = < span class =code-keyword> false >  <   / asp：LinkBut​​ton  >  
 <   / li  >  
 <   / ul  >  
 <   / ItemTemplate  >  
 <   / asp：TemplateField  >  
 <   /列 >  
 <   / asp：GridView  >  

  public   void  bindLastPost（）
 {
 ArrayList a =  new  ArrayList （）; 
 
  foreach （GridViewRow row  in  grdForum.Rows）
 { 
  int  quesID = Convert.ToInt16（grdForum.DataKeys [row.RowIndex] .Values [  TechID]。ToString（））; 
  var  lastpost = db.tblQuestions.Where（u = >  u.TechID.Equals （quesID））。OrderByDescending（u = >  u.DatePosted）.Take（ 1 ）。FirstOrDefault （）; 
 
 a.Add（ new 结果{DatePosted = lastpost.DatePosted，QuestionTitle = lastpost.QuestionTitle，UserName = lastpost.UserName}）; 
} 
 
  var  query = 来自结果学生  a 
 选择学生; 
 grdnewUser.DataSource = query.ToList（）; 
 grdnewUser.DataBind（）; 
} 

错误

 DataBinding：''ForumsApp.Main1 + Results''不包含属性名为''DatePosted''。

解决方案

请更改表格和网格中的DatePosted字段自动解决此错误。

<asp:GridView ID="grdnewUser" runat="server" AutoGenerateColumns="false" GridLines="None">
                                            <Columns>
                                                <asp:TemplateField>
                                                    <ItemTemplate>
                                                        <ul class="last_post">
                                                            <li>
                                                                <asp:Label ID="lblDateposted" Text='<%#Eval("DatePosted") %>' Font-Underline="false"

                                                                    runat="server"></asp:Label>
                                                            </li>
                                                            <li><strong>In:</strong>
                                                                <asp:Label ID="Label1" Text='<%#Eval("QuestionTitle") %>' Font-Underline="false"

                                                                    runat="server"></asp:Label>
                                                            </li>
                                                            <li><strong>By:</strong>
                                                                <asp:LinkButton ID="lnkUsername" runat="server" Text='<%#Eval("UserName") %>' Font-Underline="false"></asp:LinkButton>
                                                            </li>
                                                        </ul>
                                                    </ItemTemplate>
                                                </asp:TemplateField>
                                            </Columns>
                                        </asp:GridView>

public void bindLastPost()
        {
            ArrayList a = new ArrayList();

            foreach (GridViewRow row in grdForum.Rows)
            {
                int quesID = Convert.ToInt16(grdForum.DataKeys[row.RowIndex].Values["TechID"].ToString());
                var lastpost = db.tblQuestions.Where(u => u.TechID.Equals(quesID)).OrderByDescending(u => u.DatePosted).Take(1).FirstOrDefault();

                a.Add(new Results { DatePosted = lastpost.DatePosted, QuestionTitle = lastpost.QuestionTitle, UserName = lastpost.UserName });
            }

            var query = from Results student in a
                        select student;
            grdnewUser.DataSource = query.ToList();
            grdnewUser.DataBind();
}

error

DataBinding: ''ForumsApp.Main1+Results'' does not contain a property with the name ''DatePosted''.

解决方案

Please Change DatePosted Field In Table and Grid Automatically Solve this Error.

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