如何在datalist中添加emptydatatemplate [英] How do I add emptydatatemplate in datalist

问题描述

< asp：DataList ID =dlContractrunat =server> 
< HeaderTemplate> 
< div class =row col-xs-12 col-sm-12 col-md-12 col-lg-12 pull-left label-defaultstyle =width：300px; height：50px> ; 
< h3>< asp：Label ID =Label10runat =serverText =Contract DetailsStyle =text-align：center>< / asp：Label>< / H3>< / DIV> 
< / HeaderTemplate> 
< ItemTemplate> 
< div class =row> 
< div class =infobckstyle =height：40px; width：300px; border-left-color：＃808080> 
< div class =col-xs-9 col-sm-9 col-md-9>< asp：Label ID =Label9runat =serverText =CREATED：CssClass = dlfnt >< / ASP：标签>< / DIV> 
< div class =col-xs-3 col-sm-3 col-md-3>< asp：Label ID =Label3runat =serverText ='<％＃ Eval（CREATED）％>'Style =font-size：large>< / asp：Label>< / div> 
< div class =col-xs-3 col-sm-3 col-md-3>< asp：Label ID =lblmsgrunat =serverText =今天没有交易Style =font-size：largeVisible =false>< / asp：Label>< / div> 
 
< / div> 
< div class =infobckstyle =height：40px; width：300px; border-left-color：＃808080> 
< div class =col-xs-9 col-sm-9 col-md-9>< asp：Label ID =Label7runat =serverText =SCHEDULED：CssClass = dlfnt >< / ASP：标签>< / DIV> 
< div class =col-xs-3 col-sm-3 col-md-3> < asp：Label ID =Label5runat =serverText ='<％＃Eval（SCHEDULED）％>'Style =font-size：large>< / asp：Label> < / DIV> 
< / div>< / div> 
< / ItemTemplate> 
< FooterTemplate> 
< asp：Label ID =lblNoRecordrunat =serverText =No Record Found！ Visible ='<％＃bool.Parse（（dlContract.Items.Count == 0）.ToString（））％>'>< / asp：Label> 
< / FooterTemplate> 
< / asp：DataList> 

这里它给出了例外，因为bool未被声明或因保护而无法访问等级



我尝试过的事情：

< FooterTemplate> 
< asp：Label ID =lblNoRecordrunat =serverText =No Record Found！ Visible ='<％＃bool.Parse（（dlContract.Items.Count == 0）.ToString（））％>'>< / asp：Label> 
< / FooterTemplate> 

解决方案

它说你不能使用bool。所以，改为在类中创建一个bool属性，然后使用它。如：

可见='<％＃！this.HasRecords％>'

  public   bool  HasRecords {获取; 设置;} 
 ... 
 
 
 HasRecords = dt.Rows.Count >   0  

<asp:DataList ID="dlContract" runat="server">
                        <HeaderTemplate>
                            <div class="row col-xs-12 col-sm-12 col-md-12 col-lg-12 pull-left label-default" style ="width:300px;height:50px">
                                <h3><asp:Label ID="Label10" runat="server" Text="Contract Details" Style="text-align:center"></asp:Label></h3></div>
                        </HeaderTemplate >
                        <ItemTemplate>
                            <div class="row">
                            <div class="infobck" style="height:40px;width:300px;border-left-color:#808080">
                            <div class="col-xs-9 col-sm-9 col-md-9"><asp:Label ID="Label9" runat="server" Text="CREATED :" CssClass="dlfnt"></asp:Label></div>
                             <div class="col-xs-3 col-sm-3 col-md-3"><asp:Label ID="Label3" runat="server" Text='<%#Eval("CREATED")%>' Style="font-size:large"></asp:Label></div>
                             <div class="col-xs-3 col-sm-3 col-md-3"><asp:Label ID="lblmsg" runat="server" Text="No transaction for today" Style="font-size:large" Visible="false"></asp:Label></div>
         
                            </div>
                            <div class="infobck" style="height:40px;width:300px;border-left-color:#808080">
                            <div class="col-xs-9 col-sm-9 col-md-9"><asp:Label ID="Label7" runat="server" Text="SCHEDULED :" CssClass="dlfnt"></asp:Label></div>
                             <div class ="col-xs-3 col-sm-3 col-md-3"> <asp:Label ID="Label5" runat="server" Text='<%#Eval("SCHEDULED")%>' Style="font-size:large"></asp:Label></div>
                            </div></div>
                        </ItemTemplate>
                           <FooterTemplate>
                          <asp:Label ID="lblNoRecord" runat="server" Text="No Record Found!" Visible='<%#bool.Parse((dlContract.Items.Count==0).ToString())%>' ></asp:Label>
                         </FooterTemplate>
                    </asp:DataList>

Here it gives exception as bool is not declared or may be inaccessible due to protection level

What I have tried:

<FooterTemplate>
                          <asp:Label ID="lblNoRecord" runat="server" Text="No Record Found!" Visible='<%#bool.Parse((dlContract.Items.Count==0).ToString())%>' ></asp:Label>
                         </FooterTemplate>

解决方案

It says you cannot use bool. So, instead make a bool property in the class and then use that instead. Such as:

Visible='<%# !this.HasRecords %>'

public bool HasRecords{ get;set;}
...


HasRecords = dt.Rows.Count > 0

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