如果gridview中列的值为空，则隐藏控件 [英] Hide the control if value of a column is empty in a gridview

问题描述

我已在gridview中绑定作业列表。职位，工作地点，联系信箱 - 这些是我在gridview中绑定的字段....如果contactmail为null或为空，则应用图像按钮必须为该特定工作隐藏...我该怎么做... 。



ASPX页面：



< asp：GridView ID =GridView1GridLines =None BorderStyle =无runat =serverWidth =100％AutoGenerateColumns =False

onpageindexchanging =GridView1_PageIndexChangingAllowPaging =TruePageSize =20OnRowDataBound =GridView1_RowDataBound >

< columns>

< asp：TemplateField ControlStyle-BorderStyle =无>

< itemtemplate>

<％＃Eval（Walkin_Title）％> ; - Exp。[<％＃Eval（Exp）％>] <％ #Eval（Company_Name）％> 技能：<％＃Eval（技能）％> < tr> 工作地点：<％＃Eval（LocationName）％> < asp：ImageButton ID =ImageButton1OnClick =ImageButton1_ClickCommandArgument ='<％＃Eval（WalkinID）％>'ImageUrl =〜/ images / apply.pngrunat = server/> < asp：Label ID =maillblrunat =serverText ='<％＃Eval（ ContactMail）％>'> < asp：Label ID =resltlblrunat =serverText =LabelVisible =FalseCssClass =Confirm_Msg> ;

< br $>




< pagersettings firstpagetext =lastpagetext =>

Mode =NextPreviousFirstLastNextPageText =

PreviousPageText =PreviousFirstPageImageUrl =〜/ images / First_arrow.png

LastPageImageUrl =〜/ images / Last_Arrow.png

NextPageImageUrl =〜/ images / Next_arrow.png

PreviousPageImageUrl =〜/ images / previous_arrow.png/>

< pagerstyle horizo​​ntalalign = 中心verticalalign =底部>

解决方案

您好，您可以尝试这样，

 <   asp：label     id   =  maillbl    runat   =  server    visible   ='  <％ #Eval（< span class =code-string>  ContactMail）。ToString（）！=  ？ true ： false ％ >'    text   =  <％ #Eval（  ContactMail）％>    xmlns：asp   = ＃unknown >  
 <   / asp：label  >  
 
隐藏图像按钮
 <   asp：ImageButton     ID   = < span class =code-keyword> ImageButton1   可见  ='  <％ #Eval（   ContactMail）！=  ？ true ： false ％>'    OnClick   =  ImageButton1_Click    CommandArgument   ='   <％ #Eval（ < span class =code-string> WalkinID）％>'    ImageUrl   = 〜/ images / apply.png    runat   =  server    /  >  

I have bind the job list in my gridview. job title,job location,contactmail-these are fields i have bind in the gridview....If the contactmail is null or empty then apply image button must be hide for that particular job... How can i do that....

ASPX PAGE :

<asp:GridView ID="GridView1" GridLines="None" BorderStyle="None" runat="server" Width="100%" AutoGenerateColumns="False"
onpageindexchanging="GridView1_PageIndexChanging" AllowPaging="True" PageSize="20" OnRowDataBound="GridView1_RowDataBound" >
<columns>
<asp:TemplateField ControlStyle-BorderStyle="None">
<itemtemplate>

<%# Eval("Walkin_Title") %>--Exp.[<%#Eval("Exp")%>] <%#Eval("Company_Name")%> Skills :<%#Eval("Skills")%> Job Location :<%# Eval("LocationName")%> <asp:ImageButton ID="ImageButton1" OnClick="ImageButton1_Click" CommandArgument='<%# Eval("WalkinID")%>' ImageUrl="~/images/apply.png" runat="server" /> <asp:Label ID="maillbl" runat="server" Text='<%# Eval("ContactMail")%>' > <asp:Label ID="resltlbl" runat="server" Text="Label" Visible="False" CssClass="Confirm_Msg">

<pagersettings firstpagetext="" lastpagetext="">
Mode="NextPreviousFirstLast" NextPageText=""
PreviousPageText="Previous" FirstPageImageUrl="~/images/First_arrow.png"
LastPageImageUrl="~/images/Last_Arrow.png"
NextPageImageUrl="~/images/Next_arrow.png"
PreviousPageImageUrl="~/images/previous_arrow.png" />
<pagerstyle horizontalalign="Center" verticalalign="Bottom">

解决方案

Hi you can try like this,

<asp:label id="maillbl" runat="server" visible='<%# Eval("ContactMail").ToString()!=""?true:false %>' text="<%# Eval("ContactMail")%>" xmlns:asp="#unknown">
</asp:label>

To hide the image button 
<asp:ImageButton ID="ImageButton1" Visible='<%# Eval("ContactMail")!=""?true:false %>' OnClick="ImageButton1_Click" CommandArgument='<%# Eval("WalkinID")%>' ImageUrl="~/images/apply.png" runat="server" />

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