Eval()不返回数据字段的值 [英] Eval() not returning values for Datafield

问题描述

你好，
我试图使用Eval返回值，但出现一条错误消息，指出该值未定义.我要附加相同的代码段.如果我使用整数值，但对于某些字符串值未定义，则该值正确返回.

 <   asp:LinkBut​​ton    文本  ="     ID   ="  deleteImageButton"  runat   ="     CommandName   ="  
 
                     span>                                                      ="   deleteButton"  OnClientClick   ='  <％#"  + Eval(" ).ToString()+ " );"   / >  

函数ConfirmationMessage(eventType){
            如果(eventType！= 空&& eventType！= ' 未定义')
                返回确认(eventType);
        } 

请让我知道我哪里错了，请帮帮我.

预先感谢，
NutanR

解决方案

如何使用Eval构造OnClientClick存在问题.

尝试:

 OnClientClick = ' <％#Eval("event_name"，返回ConfirmationMessage (\"{0} \");)％>' 

try:

 <   asp:linkbutton    文本  ="     id   ="  deleteImageButton"  runat   ="    命令名  ="                                                                           CssClass   ="     ="  返回ConfirmationMessage('< ％#Eval(" )％>')" </asp:linkbutton  >  

Hello,
I was trying to return values using Eval but got an error saying that the value is undefined. I''m attaching code snippet for same. The value returned correctly if I was using an integer value but said undefined for some string values.

<asp:LinkButton Text="" ID="deleteImageButton" runat="server" CommandName="Delete"

                                       CssClass="deleteButton" OnClientClick='<%# "return ConfirmationMessage(" + Eval("event_name").ToString() + ");" %>' />

function ConfirmationMessage(eventType) {
            if (eventType != null && eventType != 'undefined')
                return confirm(eventType);
        }

Please let me know where i am wrong and help me out please.

Thank in advance,
NutanR

解决方案

There is an issue on how you are forming your OnClientClick with Eval.

Try:

OnClientClick='<%# Eval("event_name", "return ConfirmationMessage(\"{0}\");") %>'

try :

<asp:linkbutton text="" id="deleteImageButton" runat="server" commandname="Delete"                                        CssClass="deleteButton" OnClientClick="return ConfirmationMessage('<%# Eval("event_name")%>'  )"</asp:linkbutton>

这篇关于Eval()不返回数据字段的值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！