有条件地显示隐藏asp.net Gridview列 [英] conditionally show hide asp.net Gridview column

问题描述

这是我如何导航到 myPage.aspx ，

  < a href ='〜/ myPage.aspx？show =<％＃Eval（id）％>'id =showEachrunat =server>显示每个< / a> 
 
< a href =〜/ myPage.aspx？show = allid =showAllrunat =server>全部显示< / a> 
  

我在 myPage.aspx

 < asp：GridView ID =GridView1runat =server> 
<列> 
< asp：BoundField HeaderText =ColumnOneVisible =true/> 
< asp：BoundField HeaderText =ColumnTwoVisible =true/> 
< /列> 
< / asp：GridView> 
  

我想要做的是，如果Query String等于 all (~/myPage.aspx?show=all），我想将GridView1的 Column2 的visible设置为true，否则设置false为false。

怎样才能做到这一点？

解决方案

您可以使用gridview列索引来隐藏特定列

代码可以是

  if（Request.QueryString.Get（ show）==all）
 GridView1.Columns [1] .Visible = true; 
 else 
 GridView1.Columns [1] .Visible = false; 
  

更多详情

GridView按代码隐藏列

编辑1

我认为是

 < asp：BoundField HeaderText = ColumnTwo
 Visible ='<％if（Request.QueryString.Get（all）==all）trueelsefalse％>'/> 
  

您必须检查syntex

编辑2

试试这个

  Visible ='<％Request.QueryString.Get（all）==all？ true：false％>'
  

编辑3

不能直接完成。

<％=％>直接输出到响应流，而asp标记不是响应流。假设<％=％>操作符正在对asp标记执行任何预处理，这是一个错误。

更多解释

为什么会<％=％>表达式作为服务器控件上的属性值导致编译错误？

This is how I navigate to myPage.aspx ,

<a href='~/myPage.aspx?show=<%#Eval("id")%>' id="showEach" runat="server">Show Each</a>

<a href="~/myPage.aspx?show=all" id="showAll" runat="server">Show All</a>

And I have a gridview in myPage.aspx

<asp:GridView ID="GridView1" runat="server">
<Columns>
<asp:BoundField  HeaderText="ColumnOne"  Visible="true"/>
<asp:BoundField  HeaderText="ColumnTwo"  Visible="true"/>
</Columns>
</asp:GridView>

What I want to do is , if Query String is equal to all(~/myPage.aspx?show=all) , I want to set GridView1's Column2's visible to true , else , set visible to false .
How can I do it ?

解决方案

you can use gridview column index to hide the particular column

Code could be

 if(Request.QueryString.Get("show")=="all")
    GridView1.Columns[1].Visible=true;
 else
    GridView1.Columns[1].Visible=false;

More detail

GridView Hide Column by code

Edit 1

I think yes

 <asp:BoundField HeaderText="ColumnTwo" 
      Visible='<% if (Request.QueryString.Get("all") == "all" ) "true" else "false" %>'/>

You will have to check for the syntex

Edit 2

Try this

 Visible='<% Request.QueryString.Get("all") == "all"? "true": "false"%>'

Edit 3

Can not be done directly.

<%= %> outputs directly to the response stream, and the asp markup is not part of the response stream. Its a mistake to assume the <%= %> operators are performing any kind of preprocessing on the asp markup.

More explanation

Why will <%= %> expressions as property values on a server-controls lead to a compile errors?

这篇关于有条件地显示隐藏asp.net Gridview列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！